Improve cross-compilation guesses for native Windows.

* m4/btowc.m4 (gl_FUNC_BTOWC): Add cross-compilation guess for native Windows. * m4/c-stack.m4 (AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Likewise. * m4/calloc.m4 (_AC_FUNC_CALLOC_IF): Likewise. * m4/canonicalize.m4 (gl_FUNC_REALPATH_WORKS): Likewise. * m4/cbrtf.m4 (gl_FUNC_CBRTF_WORKS): Likewise. * m4/cbrtl.m4 (gl_FUNC_CBRTL, gl_FUNC_CBRTL_WORKS): Likewise. * m4/ceil.m4 (gl_FUNC_CEIL): Likewise. * m4/ceilf.m4 (gl_FUNC_CEILF): Likewise. * m4/ceill.m4 (gl_FUNC_CEILL): Likewise. * m4/d-ino.m4 (gl_CHECK_TYPE_STRUCT_DIRENT_D_INO): Likewise. * m4/dup.m4 (gl_FUNC_DUP): Likewise. * m4/expl.m4 (gl_FUNC_EXPL): Likewise. * m4/exp2.m4 (gl_FUNC_EXP2_WORKS): Likewise. * m4/exp2l.m4 (gl_FUNC_EXP2L): Likewise. * m4/expm1.m4 (gl_FUNC_EXPM1): Likewise. * m4/expm1f.m4 (gl_FUNC_EXPM1F_WORKS): Likewise. * m4/exponentl.m4 (gl_LONG_DOUBLE_EXPONENT_LOCATION): Likewise. * m4/fabsl.m4 (gl_FUNC_FABSL_WORKS): Likewise. * m4/fchdir.m4 (gl_FUNC_FCHDIR): Likewise. * m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Likewise. * m4/float_h.m4 (gl_FLOAT_H): Likewise. * m4/floor.m4 (gl_FUNC_FLOOR): Likewise. * m4/floorf.m4 (gl_FUNC_FLOORF): Likewise. * m4/fma.m4 (gl_FUNC_FMA_WORKS): Likewise. * m4/fmaf.m4 (gl_FUNC_FMAF_WORKS): Likewise. * m4/fmal.m4 (gl_FUNC_FMAL_WORKS): Likewise. * m4/fmod.m4 (gl_FUNC_FMOD): Likewise. * m4/fmodf.m4 (gl_FUNC_FMODF): Likewise. * m4/fmodl.m4 (gl_FUNC_FMODL): Likewise. * m4/frexp.m4 (gl_FUNC_FREXP_WORKS): Likewise. * m4/frexpf.m4 (gl_FUNC_FREXPF_WORKS): Likewise. * m4/ftello.m4 (gl_FUNC_FTELLO): Likewise. * m4/gettimeofday.m4 (gl_FUNC_GETTIMEOFDAY_CLOBBER): Likewise. * m4/hypot.m4 (gl_FUNC_HYPOT): Likewise. * m4/hypotf.m4 (gl_FUNC_HYPOTF, gl_FUNC_HYPOTF_WORKS): Likewise. * m4/hypotl.m4 (gl_FUNC_HYPOTL, gl_FUNC_HYPOTL_WORKS): Likewise. * m4/ilogb.m4 (gl_FUNC_ILOGB_WORKS): Likewise. * m4/ilogbf.m4 (gl_FUNC_ILOGBF_WORKS): Likewise. * m4/isfinite.m4 (gl_ISFINITEL_WORKS): Likewise. * m4/isinf.m4 (gl_ISINFL_WORKS): Likewise. * m4/isnanf.m4 (gl_ISNANF_WORKS): Likewise. * m4/isnanl.m4 (gl_FUNC_ISNANL_WORKS): Likewise. * m4/ldexpl.m4 (gl_FUNC_LDEXPL_WORKS): Likewise. * m4/log.m4 (gl_FUNC_LOG, gl_FUNC_LOG_WORKS): Likewise. * m4/logf.m4 (gl_FUNC_LOGF, gl_FUNC_LOGF_WORKS): Likewise. * m4/logl.m4 (gl_FUNC_LOGL_WORKS): Likewise. * m4/log10.m4 (gl_FUNC_LOG10, gl_FUNC_LOG10_WORKS): Likewise. * m4/log10f.m4 (gl_FUNC_LOG10F, gl_FUNC_LOG10F_WORKS): Likewise. * m4/log10l.m4 (gl_FUNC_LOG10L_WORKS): Likewise. * m4/log1p.m4 (gl_FUNC_LOG1P): Likewise. * m4/log1pf.m4 (gl_FUNC_LOG1PF, gl_FUNC_LOG1PF_WORKS): Likewise. * m4/log1pl.m4 (gl_FUNC_LOG1PL): Likewise. * m4/log2.m4 (gl_FUNC_LOG2, gl_FUNC_LOG2_WORKS): Likewise. * m4/log2f.m4 (gl_FUNC_LOG2F, gl_FUNC_LOG2F_WORKS): Likewise. * m4/log2l.m4 (gl_FUNC_LOG2L_WORKS): Likewise. * m4/logb.m4 (gl_FUNC_LOGB_WORKS): Likewise. * m4/logbf.m4 (gl_FUNC_LOGBF_WORKS): Likewise. * m4/logbl.m4 (gl_FUNC_LOGBL_WORKS): Likewise. * m4/lstat.m4 (gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK): Likewise. * m4/mbrtowc.m4 (gl_MBRTOWC_EMPTY_INPUT, gl_MBRTOWC_C_LOCALE): Likewise. * m4/mkdir.m4 (gl_FUNC_MKDIR): Likewise. * m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Likewise. * m4/mktime.m4 (gl_FUNC_MKTIME_WORKS): Likewise. * m4/modf.m4 (gl_FUNC_MODF): Likewise. * m4/modff.m4 (gl_FUNC_MODFF): Likewise. * m4/modfl.m4 (gl_FUNC_MODFL): Likewise. * m4/nanosleep.m4 (gl_FUNC_NANOSLEEP): Likewise. * m4/perror.m4 (gl_FUNC_PERROR): Likewise. * m4/popen.m4 (gl_FUNC_POPEN): Likewise. * m4/posix_spawn.m4 (gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE, gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2, gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN): Likewise. * m4/ptsname_r.m4 (gl_PREREQ_PTSNAME_R): Likewise. * m4/putenv.m4 (gl_FUNC_PUTENV): Likewise. * m4/regex.m4 (gl_REGEX): Likewise. * m4/remainder.m4 (gl_FUNC_REMAINDER): Likewise. * m4/remainderf.m4 (gl_FUNC_REMAINDERF, gl_FUNC_REMAINDERF_WORKS): Likewise. * m4/remainderl.m4 (gl_FUNC_REMAINDERL, gl_FUNC_REMAINDERL_WORKS): Likewise. * m4/rename.m4 (gl_FUNC_RENAME): Likewise. * m4/rmdir-errno.m4 (gl_FUNC_RMDIR_NOTEMPTY): Likewise. * m4/rmdir.m4 (gl_FUNC_RMDIR): Likewise. * m4/round.m4 (gl_FUNC_ROUND): Likewise. * m4/roundf.m4 (gl_FUNC_ROUNDF): Likewise. * m4/roundl.m4 (gl_FUNC_ROUNDL): Likewise. * m4/signbit.m4 (gl_SIGNBIT): Likewise. * m4/sleep.m4 (gl_FUNC_SLEEP): Likewise. * m4/sqrtl.m4 (gl_FUNC_SQRTL_WORKS): Likewise. * m4/stdint.m4 (gl_STDINT_H): Likewise. * m4/strerror.m4 (gl_FUNC_STRERROR_0): Likewise. * m4/strncat.m4 (gl_FUNC_STRNCAT): Likewise. * m4/strtod.m4 (gl_FUNC_STRTOD): Likewise. * m4/strtoimax.m4 (gl_FUNC_STRTOIMAX): Likewise. * m4/strtok_r.m4 (gl_FUNC_STRTOK_R): Likewise. * m4/trunc.m4 (gl_FUNC_TRUNC): Likewise. * m4/truncf.m4 (gl_FUNC_TRUNCF): Likewise. * m4/truncl.m4 (gl_FUNC_TRUNCL): Likewise. * m4/tsearch.m4 (gl_FUNC_TSEARCH): Likewise. * m4/tzset.m4 (gl_FUNC_TZSET_CLOBBER): Likewise. * m4/ungetc.m4 (gl_FUNC_UNGETC_WORKS): Likewise. * m4/unlink-busy.m4 (gl_FUNC_UNLINK_BUSY_TEXT): Likewise. * m4/unlink.m4 (gl_FUNC_UNLINK): Likewise. * m4/usleep.m4 (gl_FUNC_USLEEP): Likewise. * m4/utimes.m4 (gl_FUNC_UTIMES): Likewise. * m4/wcrtomb.m4 (gl_FUNC_WCRTOMB): Likewise. * m4/wcsrtombs.m4 (gl_WCSRTOMBS_TERMINATION, gl_WCSRTOMBS_NULL): Likewise. * m4/wctob.m4 (gl_FUNC_WCTOB): Likewise. * m4/chown.m4 (AC_FUNC_CHOWN): Add cross-compilation guess for native Windows. Enable also on Autoconf 2.70. * m4/printf.m4 (gl_PRINTF_SIZES_C99, gl_PRINTF_LONG_DOUBLE, gl_PRINTF_INFINITE, gl_PRINTF_INFINITE_LONG_DOUBLE, gl_PRINTF_DIRECTIVE_A, gl_PRINTF_DIRECTIVE_F, gl_PRINTF_DIRECTIVE_N, gl_PRINTF_DIRECTIVE_LS, gl_PRINTF_FLAG_LEFTADJUST, gl_PRINTF_FLAG_ZERO, gl_SNPRINTF_TRUNCATION_C99, gl_SNPRINTF_RETVAL_C99, gl_SNPRINTF_DIRECTIVE_N, gl_SNPRINTF_SIZE1): Add cross-compilation guess for native Windows. (gl_PRINTF_POSITIONS, gl_PRINTF_FLAG_GROUPING, gl_VSNPRINTF_ZEROSIZE_C99): Add comment.
author: Bruno Haible <bruno@clisp.org> 2017-07-13 21:06:02 +0200
committer: Bruno Haible <bruno@clisp.org> 2017-07-13 21:07:22 +0200
commit: a9b04535c13761e33803afab625af008d33d05e3 (patch)
tree: 3c182a785c3a1e75ce922d50205c4453a090a09e /m4
parent: abc08a2630c2e89c52ef876ef650e69d7d6a2215 (diff)
download: gnulib-a9b04535c13761e33803afab625af008d33d05e3.tar.gz
106 files changed, 907 insertions, 347 deletions
diff --git a/m4/btowc.m4 b/m4/btowc.m4
index 102180938a..5e031e0742 100644
--- a/m4/btowc.m4
+++ b/m4/btowc.m4
@@ -1,4 +1,4 @@
-# btowc.m4 serial 10
+# btowc.m4 serial 11
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -50,6 +50,8 @@ changequote(,)dnl
            case "$host_os" in
                       # Guess no on Cygwin.
              cygwin*) gl_cv_func_btowc_nul="guessing no" ;;
+                      # Guess yes on native Windows.
+             mingw*)  gl_cv_func_btowc_nul="guessing yes" ;;
                       # Guess yes otherwise.
              *)       gl_cv_func_btowc_nul="guessing yes" ;;
            esac
@@ -65,10 +67,12 @@ changequote([,])dnl
         dnl is present.
 changequote(,)dnl
         case "$host_os" in
-                 # Guess no on IRIX.
-          irix*) gl_cv_func_btowc_eof="guessing no" ;;
-                 # Guess yes otherwise.
-          *)     gl_cv_func_btowc_eof="guessing yes" ;;
+                  # Guess no on IRIX.
+          irix*)  gl_cv_func_btowc_eof="guessing no" ;;
+                  # Guess yes on native Windows.
+          mingw*) gl_cv_func_btowc_eof="guessing yes" ;;
+                  # Guess yes otherwise.
+          *)      gl_cv_func_btowc_eof="guessing yes" ;;
         esac
 changequote([,])dnl
         if test $LOCALE_FR != none; then
diff --git a/m4/c-stack.m4 b/m4/c-stack.m4
index 3a85ee9309..9f9e4f8f8f 100644
--- a/m4/c-stack.m4
+++ b/m4/c-stack.m4
@@ -7,7 +7,7 @@
 
 # Written by Paul Eggert.
 
-# serial 15
+# serial 16
 
 AC_DEFUN([AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC],
   [
@@ -123,9 +123,15 @@ AC_DEFUN([AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC],
            ]])],
         [ac_cv_sys_stack_overflow_works=yes],
         [ac_cv_sys_stack_overflow_works=no],
-        [ac_cv_sys_stack_overflow_works=cross-compiling])])
+        [case "$host_os" in
+                   # Guess no on native Windows.
+           mingw*) ac_cv_sys_stack_overflow_works="guessing no" ;;
+           *)      ac_cv_sys_stack_overflow_works=cross-compiling ;;
+         esac
+        ])
+     ])
 
-  if test $ac_cv_sys_stack_overflow_works = yes; then
+  if test "$ac_cv_sys_stack_overflow_works" = yes; then
    AC_DEFINE([HAVE_STACK_OVERFLOW_HANDLING], [1],
      [Define to 1 if extending the stack slightly past the limit causes
       a SIGSEGV which can be handled on an alternate stack established
@@ -194,7 +200,7 @@ int main ()
     fi
 
    AC_CACHE_CHECK([for precise C stack overflow detection],
-     ac_cv_sys_xsi_stack_overflow_heuristic,
+     [ac_cv_sys_xsi_stack_overflow_heuristic],
      [AC_RUN_IFELSE([AC_LANG_SOURCE(
            [[
             #include <unistd.h>
diff --git a/m4/calloc.m4 b/m4/calloc.m4
index 6b9d4e5eed..04a1a62692 100644
--- a/m4/calloc.m4
+++ b/m4/calloc.m4
@@ -1,4 +1,4 @@
-# calloc.m4 serial 16
+# calloc.m4 serial 17
 
 # Copyright (C) 2004-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -40,6 +40,8 @@ AC_DEFUN([_AC_FUNC_CALLOC_IF],
        [case "$host_os" in
                   # Guess yes on glibc systems.
           *-gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                  # Guess yes on native Windows.
+          mingw*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
                   # If we don't know, assume the worst.
           *)      ac_cv_func_calloc_0_nonnull="guessing no" ;;
         esac
diff --git a/m4/canonicalize.m4 b/m4/canonicalize.m4
index c04ff8dd00..53b1597d33 100644
--- a/m4/canonicalize.m4
+++ b/m4/canonicalize.m4
@@ -1,4 +1,4 @@
-# canonicalize.m4 serial 28
+# canonicalize.m4 serial 29
 
 dnl Copyright (C) 2003-2007, 2009-2017 Free Software Foundation, Inc.
 
@@ -113,6 +113,8 @@ AC_DEFUN([gl_FUNC_REALPATH_WORKS],
      [case "$host_os" in
                        # Guess yes on glibc systems.
         *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
+                       # Guess no on native Windows.
+        mingw*)        gl_cv_func_realpath_works="guessing no" ;;
                        # If we don't know, assume the worst.
         *)             gl_cv_func_realpath_works="guessing no" ;;
       esac
diff --git a/m4/cbrtf.m4 b/m4/cbrtf.m4
index 290036d98b..e603d1b65e 100644
--- a/m4/cbrtf.m4
+++ b/m4/cbrtf.m4
@@ -1,4 +1,4 @@
-# cbrtf.m4 serial 3
+# cbrtf.m4 serial 4
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -91,8 +91,10 @@ int main ()
         [gl_cv_func_cbrtf_works=yes],
         [gl_cv_func_cbrtf_works=no],
         [case "$host_os" in
-           irix*) gl_cv_func_cbrtf_works="guessing no";;
-           *)     gl_cv_func_cbrtf_works="guessing yes";;
+           irix*)  gl_cv_func_cbrtf_works="guessing no";;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_cbrtf_works="guessing yes";;
+           *)      gl_cv_func_cbrtf_works="guessing yes";;
          esac
         ])
     ])
diff --git a/m4/cbrtl.m4 b/m4/cbrtl.m4
index e3771ae551..3fe797982c 100644
--- a/m4/cbrtl.m4
+++ b/m4/cbrtl.m4
@@ -1,4 +1,4 @@
-# cbrtl.m4 serial 5
+# cbrtl.m4 serial 6
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -74,6 +74,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_cbrtl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_cbrtl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_cbrtl_ieee="guessing no" ;;
                esac
@@ -144,6 +146,8 @@ int main ()
         [gl_cv_func_cbrtl_works=no],
         [case "$host_os" in
            openbsd*) gl_cv_func_cbrtl_works="guessing no";;
+                     # Guess yes on native Windows.
+           mingw*)   gl_cv_func_cbrtl_works="guessing yes";;
            *)        gl_cv_func_cbrtl_works="guessing yes";;
          esac
         ])
diff --git a/m4/ceil.m4 b/m4/ceil.m4
index f58a998991..72443a739c 100644
--- a/m4/ceil.m4
+++ b/m4/ceil.m4
@@ -1,4 +1,4 @@
-# ceil.m4 serial 9
+# ceil.m4 serial 10
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -48,6 +48,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_ceil_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_ceil_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_ceil_ieee="guessing no" ;;
              esac
diff --git a/m4/ceilf.m4 b/m4/ceilf.m4
index 9770fb6422..7c83e05ab9 100644
--- a/m4/ceilf.m4
+++ b/m4/ceilf.m4
@@ -1,4 +1,4 @@
-# ceilf.m4 serial 14
+# ceilf.m4 serial 15
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -55,6 +55,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_ceilf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_ceilf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_ceilf_ieee="guessing no" ;;
                esac
diff --git a/m4/ceill.m4 b/m4/ceill.m4
index e981c7bcf7..54bf8dd35d 100644
--- a/m4/ceill.m4
+++ b/m4/ceill.m4
@@ -1,4 +1,4 @@
-# ceill.m4 serial 15
+# ceill.m4 serial 16
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -54,6 +54,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_ceill_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_ceill_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_ceill_ieee="guessing no" ;;
                esac
@@ -83,10 +85,13 @@ int main (int argc, char *argv[])
 long double d = 0.3L;]],
              [[return (!(ceill (d) == 1)); ]])],
              [gl_cv_func_ceill_buggy=no], [gl_cv_func_ceill_buggy=yes],
-             [case $host_os in
-                openbsd*) gl_cv_func_ceill_buggy="guessing yes";;
-                *) gl_cv_func_ceill_buggy="guessing no";;
-              esac])
+             [case "$host_os" in
+                openbsd*) gl_cv_func_ceill_buggy="guessing yes" ;;
+                          # Guess no on native Windows.
+                mingw*)   gl_cv_func_ceill_buggy="guessing no" ;;
+                *)        gl_cv_func_ceill_buggy="guessing no" ;;
+              esac
+             ])
           LIBS="$save_LIBS"
         ])
     case "$gl_cv_func_ceill_buggy" in
diff --git a/m4/chown.m4 b/m4/chown.m4
index 36487d9d08..588b6bae4e 100644
--- a/m4/chown.m4
+++ b/m4/chown.m4
@@ -1,4 +1,4 @@
-# serial 27
+# serial 28
 # Determine whether we need the chown wrapper.
 
 dnl Copyright (C) 1997-2001, 2003-2005, 2007, 2009-2017 Free Software
@@ -14,8 +14,6 @@ dnl with or without modifications, as long as this notice is preserved.
 
 # From Jim Meyering.
 
-m4_version_prereq([2.70], [] ,[
-
 # This is taken from the following Autoconf patch:
 # http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9
 AC_DEFUN([AC_FUNC_CHOWN],
@@ -49,21 +47,23 @@ AC_DEFUN([AC_FUNC_CHOWN],
        [ac_cv_func_chown_works=no],
        [case "$host_os" in # ((
                   # Guess yes on glibc systems.
-          *-gnu*) ac_cv_func_chown_works=yes ;;
+          *-gnu*) ac_cv_func_chown_works="guessing yes" ;;
+                  # Guess no on native Windows.
+          mingw*) ac_cv_func_chown_works="guessing no" ;;
                   # If we don't know, assume the worst.
-          *)      ac_cv_func_chown_works=no ;;
+          *)      ac_cv_func_chown_works="guessing no" ;;
         esac
        ])
      rm -f conftest.chown
     ])
-  if test $ac_cv_func_chown_works = yes; then
-    AC_DEFINE([HAVE_CHOWN], [1],
-      [Define to 1 if your system has a working `chown' function.])
-  fi
+  case "$ac_cv_func_chown_works" in
+    *yes)
+      AC_DEFINE([HAVE_CHOWN], [1],
+        [Define to 1 if your system has a working `chown' function.])
+      ;;
+  esac
 ])# AC_FUNC_CHOWN
 
-])
-
 AC_DEFUN_ONCE([gl_FUNC_CHOWN],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
@@ -83,11 +83,13 @@ AC_DEFUN_ONCE([gl_FUNC_CHOWN],
     fi
 
     dnl Some old systems tried to use uid/gid -1 literally.
-    if test $ac_cv_func_chown_works = no; then
-      AC_DEFINE([CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE], [1],
-        [Define if chown is not POSIX compliant regarding IDs of -1.])
-      REPLACE_CHOWN=1
-    fi
+    case "$ac_cv_func_chown_works" in
+      *no)
+        AC_DEFINE([CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE], [1],
+          [Define if chown is not POSIX compliant regarding IDs of -1.])
+        REPLACE_CHOWN=1
+        ;;
+    esac
 
     dnl Solaris 9 ignores trailing slash.
     dnl FreeBSD 7.2 mishandles trailing slash on symlinks.
diff --git a/m4/d-ino.m4 b/m4/d-ino.m4
index fa599ed56d..376045cc3b 100644
--- a/m4/d-ino.m4
+++ b/m4/d-ino.m4
@@ -1,4 +1,4 @@
-# serial 17
+# serial 18
 
 dnl From Jim Meyering.
 dnl
@@ -42,6 +42,8 @@ AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
            [case "$host_os" in
                            # Guess yes on glibc systems with Linux kernel.
               linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                           # Guess no on native Windows.
+              mingw*)      gl_cv_struct_dirent_d_ino="guessing no" ;;
                            # If we don't know, assume the worst.
               *)           gl_cv_struct_dirent_d_ino="guessing no" ;;
             esac
diff --git a/m4/dup.m4 b/m4/dup.m4
index 75307cbb89..42ef5d7a1a 100644
--- a/m4/dup.m4
+++ b/m4/dup.m4
@@ -1,4 +1,4 @@
-# dup.m4 serial 5
+# dup.m4 serial 6
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_DUP],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   m4_ifdef([gl_MSVC_INVAL], [
     AC_REQUIRE([gl_MSVC_INVAL])
     if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
@@ -33,7 +34,12 @@ AC_DEFUN([gl_FUNC_DUP],
       ],
       [gl_cv_func_dup_works=yes],
       [gl_cv_func_dup_works=no],
-      [gl_cv_func_dup_works='guessing yes'])
+      [case "$host_os" in
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_dup_works="guessing no" ;;
+         *)      gl_cv_func_dup_works="guessing yes" ;;
+       esac
+      ])
     ])
   case "$gl_cv_func_dup_works" in
     *yes) ;;
diff --git a/m4/exp2.m4 b/m4/exp2.m4
index 6aa76f72d3..3c522f6af0 100644
--- a/m4/exp2.m4
+++ b/m4/exp2.m4
@@ -1,4 +1,4 @@
-# exp2.m4 serial 1
+# exp2.m4 serial 2
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -136,8 +136,10 @@ int main ()
         [gl_cv_func_exp2_works=yes],
         [gl_cv_func_exp2_works=no],
         [case "$host_os" in
-           openbsd*) gl_cv_func_exp2_works="guessing no";;
-           *)        gl_cv_func_exp2_works="guessing yes";;
+           openbsd*) gl_cv_func_exp2_works="guessing no" ;;
+                     # Guess yes on native Windows.
+           mingw*)   gl_cv_func_exp2_works="guessing yes" ;;
+           *)        gl_cv_func_exp2_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/exp2l.m4 b/m4/exp2l.m4
index a964034236..93edca305a 100644
--- a/m4/exp2l.m4
+++ b/m4/exp2l.m4
@@ -1,4 +1,4 @@
-# exp2l.m4 serial 3
+# exp2l.m4 serial 4
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -66,6 +66,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_exp2l_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_exp2l_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_exp2l_ieee="guessing no" ;;
                esac
diff --git a/m4/expl.m4 b/m4/expl.m4
index 530bad8f4b..2eddf0a19e 100644
--- a/m4/expl.m4
+++ b/m4/expl.m4
@@ -1,4 +1,4 @@
-# expl.m4 serial 9
+# expl.m4 serial 10
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -71,9 +71,12 @@ AC_DEFUN([gl_FUNC_EXPL],
                       isnan(expl(-0.4)); ]])],
              [gl_cv_func_expl_buggy=no], [gl_cv_func_expl_buggy=yes],
              [case $host_os in
-                openbsd*) gl_cv_func_expl_buggy="guessing yes";;
-                *) gl_cv_func_expl_buggy="guessing no";;
-              esac])
+                openbsd*) gl_cv_func_expl_buggy="guessing yes" ;;
+                          # Guess no on native Windows.
+                mingw*)   gl_cv_func_expl_buggy="guessing no" ;;
+                *)        gl_cv_func_expl_buggy="guessing no" ;;
+              esac
+             ])
           LIBS="$save_LIBS"
         ])
     case "$gl_cv_func_expl_buggy" in
diff --git a/m4/expm1.m4 b/m4/expm1.m4
index d43a08d5d7..fa62f8727c 100644
--- a/m4/expm1.m4
+++ b/m4/expm1.m4
@@ -1,4 +1,4 @@
-# expm1.m4 serial 3
+# expm1.m4 serial 4
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -87,6 +87,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_expm1_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_expm1_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_expm1_ieee="guessing no" ;;
                esac
diff --git a/m4/expm1f.m4 b/m4/expm1f.m4
index 6f00472537..3fa9608049 100644
--- a/m4/expm1f.m4
+++ b/m4/expm1f.m4
@@ -1,4 +1,4 @@
-# expm1f.m4 serial 2
+# expm1f.m4 serial 3
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -63,8 +63,10 @@ int main ()
         [gl_cv_func_expm1f_works=yes],
         [gl_cv_func_expm1f_works=no],
         [case "$host_os" in
-           irix*) gl_cv_func_expm1f_works="guessing no";;
-           *)     gl_cv_func_expm1f_works="guessing yes";;
+           irix*)  gl_cv_func_expm1f_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_expm1f_works="guessing yes" ;;
+           *)      gl_cv_func_expm1f_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/exponentl.m4 b/m4/exponentl.m4
index c9cb81dd82..ebfebe496b 100644
--- a/m4/exponentl.m4
+++ b/m4/exponentl.m4
@@ -1,4 +1,4 @@
-# exponentl.m4 serial 3
+# exponentl.m4 serial 4
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -6,6 +6,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_LONG_DOUBLE_EXPONENT_LOCATION],
 [
   AC_REQUIRE([gl_BIGENDIAN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([where to find the exponent in a 'long double'],
     [gl_cv_cc_long_double_expbit0],
     [
@@ -79,9 +80,24 @@ int main ()
         [gl_cv_cc_long_double_expbit0=`cat conftest.out`],
         [gl_cv_cc_long_double_expbit0="unknown"],
         [
-          dnl When cross-compiling, we don't know. It depends on the
+          dnl When cross-compiling, in general we don't know. It depends on the
           dnl ABI and compiler version. There are too many cases.
           gl_cv_cc_long_double_expbit0="unknown"
+          case "$host_os" in
+            mingw*) # On native Windows (little-endian), we know the result
+                    # in two cases: mingw, MSVC.
+              AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+                ], [gl_cv_cc_long_double_expbit0="word 2 bit 0"])
+              AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                ], [gl_cv_cc_long_double_expbit0="word 1 bit 20"])
+              ;;
+          esac
         ])
       rm -f conftest.out
     ])
diff --git a/m4/fabsl.m4 b/m4/fabsl.m4
index 9d853483bf..93bf760c77 100644
--- a/m4/fabsl.m4
+++ b/m4/fabsl.m4
@@ -1,4 +1,4 @@
-# fabsl.m4 serial 2
+# fabsl.m4 serial 3
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -66,8 +66,10 @@ int main ()
         [gl_cv_func_fabsl_works=yes],
         [gl_cv_func_fabsl_works=no],
         [case "$host_os" in
-           irix*) gl_cv_func_fabsl_works="guessing no";;
-           *)     gl_cv_func_fabsl_works="guessing yes";;
+           irix*)  gl_cv_func_fabsl_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_fabsl_works="guessing yes" ;;
+           *)      gl_cv_func_fabsl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/fchdir.m4 b/m4/fchdir.m4
index b3d1b0b20b..0ef04ed8e9 100644
--- a/m4/fchdir.m4
+++ b/m4/fchdir.m4
@@ -1,4 +1,4 @@
-# fchdir.m4 serial 21
+# fchdir.m4 serial 22
 dnl Copyright (C) 2006-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -33,6 +33,8 @@ AC_DEFUN([gl_FUNC_FCHDIR],
         [case "$host_os" in
                    # Guess yes on glibc systems.
            *-gnu*) gl_cv_func_open_directory_works="guessing yes" ;;
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_open_directory_works="guessing no" ;;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_open_directory_works="guessing no" ;;
          esac
diff --git a/m4/fcntl-o.m4 b/m4/fcntl-o.m4
index 3c3b63c525..b388d8935a 100644
--- a/m4/fcntl-o.m4
+++ b/m4/fcntl-o.m4
@@ -1,4 +1,4 @@
-# fcntl-o.m4 serial 4
+# fcntl-o.m4 serial 5
 dnl Copyright (C) 2006, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -18,6 +18,7 @@ AC_DEFUN([gl_FCNTL_O_FLAGS],
     [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
     [AC_REQUIRE([AC_GNU_SOURCE])])
 
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CHECK_FUNCS_ONCE([symlink])
   AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
@@ -116,7 +117,13 @@ AC_DEFUN([gl_FCNTL_O_FLAGS],
         68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
          *) gl_cv_header_working_fcntl_h='no';;
         esac],
-       [gl_cv_header_working_fcntl_h=cross-compiling])])
+       [case "$host_os" in
+                  # Guess 'no' on native Windows.
+          mingw*) gl_cv_header_working_fcntl_h='no' ;;
+          *)      gl_cv_header_working_fcntl_h=cross-compiling ;;
+        esac
+       ])
+    ])
 
   case $gl_cv_header_working_fcntl_h in #(
   *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
diff --git a/m4/float_h.m4 b/m4/float_h.m4
index 40dc1021c4..4c42176b6f 100644
--- a/m4/float_h.m4
+++ b/m4/float_h.m4
@@ -1,4 +1,4 @@
-# float_h.m4 serial 10
+# float_h.m4 serial 11
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -76,7 +76,9 @@ int main ()
                [gl_cv_func_itold_works="guessing no"],
                [gl_cv_func_itold_works="guessing yes"])
              ;;
-           *) gl_cv_func_itold_works="guessing yes" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_itold_works="guessing yes" ;;
+           *)      gl_cv_func_itold_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/floor.m4 b/m4/floor.m4
index 713e7b346e..0f99200407 100644
--- a/m4/floor.m4
+++ b/m4/floor.m4
@@ -1,4 +1,4 @@
-# floor.m4 serial 8
+# floor.m4 serial 9
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -44,6 +44,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_floor_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_floor_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_floor_ieee="guessing no" ;;
              esac
diff --git a/m4/floorf.m4 b/m4/floorf.m4
index f456aaa7b4..2f7e604fa0 100644
--- a/m4/floorf.m4
+++ b/m4/floorf.m4
@@ -1,4 +1,4 @@
-# floorf.m4 serial 13
+# floorf.m4 serial 14
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -51,6 +51,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_floorf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_floorf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_floorf_ieee="guessing no" ;;
                esac
diff --git a/m4/fma.m4 b/m4/fma.m4
index 9ec564bcaf..4f1686ab86 100644
--- a/m4/fma.m4
+++ b/m4/fma.m4
@@ -1,4 +1,4 @@
-# fma.m4 serial 2
+# fma.m4 serial 3
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -167,8 +167,18 @@ int main()
 }]])],
         [gl_cv_func_fma_works=yes],
         [gl_cv_func_fma_works=no],
-        [dnl Guess no, even on glibc systems.
+        [dnl Guess yes on native Windows with MSVC.
+         dnl Otherwise guess no, even on glibc systems.
          gl_cv_func_fma_works="guessing no"
+         case "$host_os" in
+           mingw*)
+             AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+               ], [gl_cv_func_fma_works="guessing yes"])
+             ;;
+         esac
         ])
     ])
   LIBS="$save_LIBS"
diff --git a/m4/fmaf.m4 b/m4/fmaf.m4
index 57d553c452..1da8690ca9 100644
--- a/m4/fmaf.m4
+++ b/m4/fmaf.m4
@@ -1,4 +1,4 @@
-# fmaf.m4 serial 3
+# fmaf.m4 serial 4
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -171,8 +171,18 @@ int main()
 }]])],
         [gl_cv_func_fmaf_works=yes],
         [gl_cv_func_fmaf_works=no],
-        [dnl Guess no, even on glibc systems.
+        [dnl Guess yes on native Windows with MSVC.
+         dnl Otherwise guess no, even on glibc systems.
          gl_cv_func_fmaf_works="guessing no"
+         case "$host_os" in
+           mingw*)
+             AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+               ], [gl_cv_func_fmaf_works="guessing yes"])
+             ;;
+         esac
         ])
     ])
   LIBS="$save_LIBS"
diff --git a/m4/fmal.m4 b/m4/fmal.m4
index eb8dc1a062..b8913cdd10 100644
--- a/m4/fmal.m4
+++ b/m4/fmal.m4
@@ -1,4 +1,4 @@
-# fmal.m4 serial 5
+# fmal.m4 serial 6
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -369,8 +369,18 @@ int main()
 }]])],
         [gl_cv_func_fmal_works=yes],
         [gl_cv_func_fmal_works=no],
-        [dnl Guess no, even on glibc systems.
+        [dnl Guess yes on native Windows with MSVC.
+         dnl Otherwise guess no, even on glibc systems.
          gl_cv_func_fmal_works="guessing no"
+         case "$host_os" in
+           mingw*)
+             AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+               ], [gl_cv_func_fmal_works="guessing yes"])
+             ;;
+         esac
         ])
     ])
   LIBS="$save_LIBS"
diff --git a/m4/fmod.m4 b/m4/fmod.m4
index e064b50df0..efc1dc968e 100644
--- a/m4/fmod.m4
+++ b/m4/fmod.m4
@@ -1,4 +1,4 @@
-# fmod.m4 serial 4
+# fmod.m4 serial 5
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -60,6 +60,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_fmod_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_fmod_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_fmod_ieee="guessing no" ;;
              esac
diff --git a/m4/fmodf.m4 b/m4/fmodf.m4
index 99944dae1a..fb5c88eabb 100644
--- a/m4/fmodf.m4
+++ b/m4/fmodf.m4
@@ -1,4 +1,4 @@
-# fmodf.m4 serial 6
+# fmodf.m4 serial 7
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -61,6 +61,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_fmodf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_fmodf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_fmodf_ieee="guessing no" ;;
                esac
diff --git a/m4/fmodl.m4 b/m4/fmodl.m4
index 74e60b072c..110ba8fed0 100644
--- a/m4/fmodl.m4
+++ b/m4/fmodl.m4
@@ -1,4 +1,4 @@
-# fmodl.m4 serial 6
+# fmodl.m4 serial 7
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -72,6 +72,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_fmodl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_fmodl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_fmodl_ieee="guessing no" ;;
                esac
diff --git a/m4/frexp.m4 b/m4/frexp.m4
index 73f50b3e35..425765be92 100644
--- a/m4/frexp.m4
+++ b/m4/frexp.m4
@@ -1,4 +1,4 @@
-# frexp.m4 serial 15
+# frexp.m4 serial 16
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -164,8 +164,17 @@ int main()
         [gl_cv_func_frexp_works=yes],
         [gl_cv_func_frexp_works=no],
         [case "$host_os" in
-           netbsd* | irix* | mingw*) gl_cv_func_frexp_works="guessing no";;
-           *)                        gl_cv_func_frexp_works="guessing yes";;
+           netbsd* | irix*) gl_cv_func_frexp_works="guessing no" ;;
+           mingw*) # Guess yes with MSVC, no with mingw.
+             AC_EGREP_CPP([Good], [
+#ifdef _MSC_VER
+ Good
+#endif
+               ],
+               [gl_cv_func_frexp_works="guessing yes"],
+               [gl_cv_func_frexp_works="guessing no"])
+             ;;
+           *) gl_cv_func_frexp_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/frexpf.m4 b/m4/frexpf.m4
index 1e35fdd4e9..9b7842537d 100644
--- a/m4/frexpf.m4
+++ b/m4/frexpf.m4
@@ -1,4 +1,4 @@
-# frexpf.m4 serial 5
+# frexpf.m4 serial 6
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -88,8 +88,17 @@ int main()
         [gl_cv_func_frexpf_works=yes],
         [gl_cv_func_frexpf_works=no],
         [case "$host_os" in
-           irix* | mingw*) gl_cv_func_frexpf_works="guessing no";;
-           *)              gl_cv_func_frexpf_works="guessing yes";;
+           irix*) gl_cv_func_frexpf_works="guessing no" ;;
+           mingw*) # Guess yes with MSVC, no with mingw.
+             AC_EGREP_CPP([Good], [
+#ifdef _MSC_VER
+ Good
+#endif
+               ],
+               [gl_cv_func_frexpf_works="guessing yes"],
+               [gl_cv_func_frexpf_works="guessing no"])
+             ;;
+           *) gl_cv_func_frexpf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/ftello.m4 b/m4/ftello.m4
index 8a4cdc5308..cce13ae4bd 100644
--- a/m4/ftello.m4
+++ b/m4/ftello.m4
@@ -1,4 +1,4 @@
-# ftello.m4 serial 12
+# ftello.m4 serial 13
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -53,6 +53,8 @@ changequote(,)dnl
           case "$host_os" in
                       # Guess no on Solaris.
             solaris*) gl_cv_func_ftello_works="guessing no" ;;
+                      # Guess yes on native Windows.
+            mingw*)   gl_cv_func_ftello_works="guessing yes" ;;
                       # Guess yes otherwise.
             *)        gl_cv_func_ftello_works="guessing yes" ;;
           esac
diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4
index 8ee206eea2..efa114dfaf 100644
--- a/m4/gettimeofday.m4
+++ b/m4/gettimeofday.m4
@@ -1,4 +1,4 @@
-# serial 23
+# serial 24
 
 # Copyright (C) 2001-2003, 2005, 2007, 2009-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -105,6 +105,8 @@ AC_DEFUN([gl_FUNC_GETTIMEOFDAY_CLOBBER],
       case "$host_os" in
                 # Guess all is fine on glibc systems.
         *-gnu*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
+                # Guess no on native Windows.
+        mingw*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
                 # If we don't know, assume the worst.
         *)      gl_cv_func_gettimeofday_clobber="guessing yes" ;;
       esac
diff --git a/m4/hypot.m4 b/m4/hypot.m4
index d5bc7f3e85..0684792911 100644
--- a/m4/hypot.m4
+++ b/m4/hypot.m4
@@ -1,4 +1,4 @@
-# hypot.m4 serial 4
+# hypot.m4 serial 5
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -57,6 +57,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_hypot_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_hypot_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_hypot_ieee="guessing no" ;;
              esac
diff --git a/m4/hypotf.m4 b/m4/hypotf.m4
index 2876739209..d012cd822f 100644
--- a/m4/hypotf.m4
+++ b/m4/hypotf.m4
@@ -1,4 +1,4 @@
-# hypotf.m4 serial 5
+# hypotf.m4 serial 6
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -73,6 +73,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_hypotf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_hypotf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_hypotf_ieee="guessing no" ;;
                esac
@@ -139,8 +141,10 @@ int main ()
         [gl_cv_func_hypotf_works=yes],
         [gl_cv_func_hypotf_works=no],
         [case "$host_os" in
-           netbsd* | openbsd*) gl_cv_func_hypotf_works="guessing no";;
-           *)                  gl_cv_func_hypotf_works="guessing yes";;
+           netbsd* | openbsd*) gl_cv_func_hypotf_works="guessing no" ;;
+                               # Guess yes on native Windows.
+           mingw*)             gl_cv_func_hypotf_works="guessing yes" ;;
+           *)                  gl_cv_func_hypotf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/hypotl.m4 b/m4/hypotl.m4
index ec39707505..64f7af21cf 100644
--- a/m4/hypotl.m4
+++ b/m4/hypotl.m4
@@ -1,4 +1,4 @@
-# hypotl.m4 serial 6
+# hypotl.m4 serial 7
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -73,6 +73,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_hypotl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_hypotl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_hypotl_ieee="guessing no" ;;
                esac
@@ -172,8 +174,10 @@ int main ()
         [gl_cv_func_hypotl_works=yes],
         [gl_cv_func_hypotl_works=no],
         [case "$host_os" in
-           openbsd*) gl_cv_func_hypotl_works="guessing no";;
-           *)        gl_cv_func_hypotl_works="guessing yes";;
+           openbsd*) gl_cv_func_hypotl_works="guessing no" ;;
+                     # Guess yes on native Windows.
+           mingw*)   gl_cv_func_hypotl_works="guessing yes" ;;
+           *)        gl_cv_func_hypotl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/ilogb.m4 b/m4/ilogb.m4
index 07639ccb51..1d56ecbf44 100644
--- a/m4/ilogb.m4
+++ b/m4/ilogb.m4
@@ -1,4 +1,4 @@
-# ilogb.m4 serial 1
+# ilogb.m4 serial 2
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -104,8 +104,10 @@ int main (int argc, char *argv[])
         [gl_cv_func_ilogb_works=no],
         [case "$host_os" in
            aix* | openbsd* | netbsd* | solaris*)
-              gl_cv_func_ilogb_works="guessing no";;
-           *) gl_cv_func_ilogb_works="guessing yes";;
+                   gl_cv_func_ilogb_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_ilogb_works="guessing yes" ;;
+           *)      gl_cv_func_ilogb_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/ilogbf.m4 b/m4/ilogbf.m4
index db539021d7..4e16e07aab 100644
--- a/m4/ilogbf.m4
+++ b/m4/ilogbf.m4
@@ -1,4 +1,4 @@
-# ilogbf.m4 serial 1
+# ilogbf.m4 serial 2
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -99,8 +99,11 @@ int main (int argc, char *argv[])
         [gl_cv_func_ilogbf_works=yes],
         [gl_cv_func_ilogbf_works=no],
         [case "$host_os" in
-           openbsd* | netbsd*) gl_cv_func_ilogbf_works="guessing no";;
-           *)                  gl_cv_func_ilogbf_works="guessing yes";;
+           openbsd* | netbsd*)
+                   gl_cv_func_ilogbf_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_ilogbf_works="guessing yes" ;;
+           *)      gl_cv_func_ilogbf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/isfinite.m4 b/m4/isfinite.m4
index fab12be863..09bb8cbaec 100644
--- a/m4/isfinite.m4
+++ b/m4/isfinite.m4
@@ -1,4 +1,4 @@
-# isfinite.m4 serial 15
+# isfinite.m4 serial 16
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -143,7 +143,14 @@ int main ()
 #endif
 
   return result;
-}]])], [gl_cv_func_isfinitel_works=yes], [gl_cv_func_isfinitel_works=no],
-      [gl_cv_func_isfinitel_works="guessing yes"])
+}]])],
+      [gl_cv_func_isfinitel_works=yes],
+      [gl_cv_func_isfinitel_works=no],
+      [case "$host_os" in
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_isfinitel_works="guessing no" ;;
+         *)      gl_cv_func_isfinitel_works="guessing yes" ;;
+       esac
+      ])
     ])
 ])
diff --git a/m4/isinf.m4 b/m4/isinf.m4
index 146529d9d1..92cbb271f0 100644
--- a/m4/isinf.m4
+++ b/m4/isinf.m4
@@ -1,4 +1,4 @@
-# isinf.m4 serial 11
+# isinf.m4 serial 12
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -150,7 +150,23 @@ int main ()
 #endif
 
   return result;
-}]])], [gl_cv_func_isinfl_works=yes], [gl_cv_func_isinfl_works=no],
-      [gl_cv_func_isinfl_works="guessing yes"])
+}]])],
+      [gl_cv_func_isinfl_works=yes],
+      [gl_cv_func_isinfl_works=no],
+      [case "$host_os" in
+         mingw*) # Guess yes on mingw, no on MSVC.
+           AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+             ],
+             [gl_cv_func_isinfl_works="guessing yes"],
+             [gl_cv_func_isinfl_works="guessing no"])
+           ;;
+         *)
+           gl_cv_func_isinfl_works="guessing yes"
+           ;;
+       esac
+      ])
     ])
 ])
diff --git a/m4/isnanf.m4 b/m4/isnanf.m4
index 1a0d03e636..856234ab8f 100644
--- a/m4/isnanf.m4
+++ b/m4/isnanf.m4
@@ -1,4 +1,4 @@
-# isnanf.m4 serial 14
+# isnanf.m4 serial 15
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -180,8 +180,17 @@ int main()
         [gl_cv_func_isnanf_works=yes],
         [gl_cv_func_isnanf_works=no],
         [case "$host_os" in
-           irix* | solaris*) gl_cv_func_isnanf_works="guessing no";;
-           *)                gl_cv_func_isnanf_works="guessing yes";;
+           irix* | solaris*) gl_cv_func_isnanf_works="guessing no" ;;
+           mingw*) # Guess yes on mingw, no on MSVC.
+             AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+               ],
+               [gl_cv_func_isnanf_works="guessing yes"],
+               [gl_cv_func_isnanf_works="guessing no"])
+             ;;
+           *) gl_cv_func_isnanf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/isnanl.m4 b/m4/isnanl.m4
index a42cfc0753..9578d2d2df 100644
--- a/m4/isnanl.m4
+++ b/m4/isnanl.m4
@@ -1,4 +1,4 @@
-# isnanl.m4 serial 19
+# isnanl.m4 serial 20
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -231,6 +231,18 @@ int main ()
 }]])],
         [gl_cv_func_isnanl_works=yes],
         [gl_cv_func_isnanl_works=no],
-        [gl_cv_func_isnanl_works="guessing yes"])
+        [case "$host_os" in
+           mingw*) # Guess yes on mingw, no on MSVC.
+             AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+               ],
+               [gl_cv_func_isnanl_works="guessing yes"],
+               [gl_cv_func_isnanl_works="guessing no"])
+             ;;
+           *) gl_cv_func_isnanl_works="guessing yes" ;;
+         esac
+        ])
     ])
 ])
diff --git a/m4/ldexpl.m4 b/m4/ldexpl.m4
index 0bffca1e92..5989b9939a 100644
--- a/m4/ldexpl.m4
+++ b/m4/ldexpl.m4
@@ -1,4 +1,4 @@
-# ldexpl.m4 serial 16
+# ldexpl.m4 serial 17
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -124,8 +124,10 @@ int main()
         [
 changequote(,)dnl
          case "$host_os" in
-           aix | aix[3-6]*) gl_cv_func_ldexpl_works="guessing no";;
-           *)               gl_cv_func_ldexpl_works="guessing yes";;
+           aix | aix[3-6]*) gl_cv_func_ldexpl_works="guessing no" ;;
+                            # Guess yes on native Windows.
+           mingw*)          gl_cv_func_ldexpl_works="guessing yes" ;;
+           *)               gl_cv_func_ldexpl_works="guessing yes" ;;
          esac
 changequote([,])dnl
         ])
diff --git a/m4/log.m4 b/m4/log.m4
index 90dee2403a..200c0571d1 100644
--- a/m4/log.m4
+++ b/m4/log.m4
@@ -1,4 +1,4 @@
-# log.m4 serial 4
+# log.m4 serial 5
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -60,6 +60,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_log_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_log_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_log_ieee="guessing no" ;;
              esac
@@ -99,8 +101,10 @@ int main ()
         [gl_cv_func_log_works=yes],
         [gl_cv_func_log_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_log_works="guessing no";;
-           *)    gl_cv_func_log_works="guessing yes";;
+           osf*)   gl_cv_func_log_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_log_works="guessing yes" ;;
+           *)      gl_cv_func_log_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log10.m4 b/m4/log10.m4
index ff5be88f39..8b1a34211d 100644
--- a/m4/log10.m4
+++ b/m4/log10.m4
@@ -1,4 +1,4 @@
-# log10.m4 serial 4
+# log10.m4 serial 5
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -60,6 +60,8 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_log10_ieee="guessing yes" ;;
+                       # Guess yes on native Windows.
+               mingw*) gl_cv_func_log10_ieee="guessing yes" ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_log10_ieee="guessing no" ;;
              esac
@@ -99,8 +101,10 @@ int main ()
         [gl_cv_func_log10_works=yes],
         [gl_cv_func_log10_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_log10_works="guessing no";;
-           *)    gl_cv_func_log10_works="guessing yes";;
+           osf*)   gl_cv_func_log10_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_log10_works="guessing yes" ;;
+           *)      gl_cv_func_log10_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log10f.m4 b/m4/log10f.m4
index 95154f6a24..699e3a1592 100644
--- a/m4/log10f.m4
+++ b/m4/log10f.m4
@@ -1,4 +1,4 @@
-# log10f.m4 serial 7
+# log10f.m4 serial 8
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -70,6 +70,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log10f_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log10f_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log10f_ieee="guessing no" ;;
                esac
@@ -123,8 +125,10 @@ int main ()
         [gl_cv_func_log10f_works=yes],
         [gl_cv_func_log10f_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_log10f_works="guessing no";;
-           *)    gl_cv_func_log10f_works="guessing yes";;
+           osf*)   gl_cv_func_log10f_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_log10f_works="guessing yes" ;;
+           *)      gl_cv_func_log10f_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log10l.m4 b/m4/log10l.m4
index be9e43962e..999910212a 100644
--- a/m4/log10l.m4
+++ b/m4/log10l.m4
@@ -1,4 +1,4 @@
-# log10l.m4 serial 4
+# log10l.m4 serial 5
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -94,8 +94,10 @@ int main ()
         [gl_cv_func_log10l_works=yes],
         [gl_cv_func_log10l_works=no],
         [case "$host_os" in
-           aix* | irix* | osf*) gl_cv_func_log10l_works="guessing no";;
-           *)                   gl_cv_func_log10l_works="guessing yes";;
+           aix* | irix* | osf*) gl_cv_func_log10l_works="guessing no" ;;
+                                # Guess yes on native Windows.
+           mingw*)              gl_cv_func_log10l_works="guessing yes" ;;
+           *)                   gl_cv_func_log10l_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log1p.m4 b/m4/log1p.m4
index f55ac549ee..ae8fc53e62 100644
--- a/m4/log1p.m4
+++ b/m4/log1p.m4
@@ -1,4 +1,4 @@
-# log1p.m4 serial 3
+# log1p.m4 serial 4
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -54,6 +54,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log1p_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log1p_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log1p_ieee="guessing no" ;;
                esac
diff --git a/m4/log1pf.m4 b/m4/log1pf.m4
index 0a47c19a94..8c8a714d09 100644
--- a/m4/log1pf.m4
+++ b/m4/log1pf.m4
@@ -1,4 +1,4 @@
-# log1pf.m4 serial 3
+# log1pf.m4 serial 4
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -63,6 +63,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log1pf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log1pf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log1pf_ieee="guessing no" ;;
                esac
@@ -110,8 +112,10 @@ int main ()
         [gl_cv_func_log1pf_works=yes],
         [gl_cv_func_log1pf_works=no],
         [case "$host_os" in
-           irix*) gl_cv_func_log1pf_works="guessing no";;
-           *)     gl_cv_func_log1pf_works="guessing yes";;
+           irix*)  gl_cv_func_log1pf_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_log1pf_works="guessing yes" ;;
+           *)      gl_cv_func_log1pf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log1pl.m4 b/m4/log1pl.m4
index 92d1a9e538..519507f44f 100644
--- a/m4/log1pl.m4
+++ b/m4/log1pl.m4
@@ -1,4 +1,4 @@
-# log1pl.m4 serial 3
+# log1pl.m4 serial 4
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -54,6 +54,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log1pl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log1pl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log1pl_ieee="guessing no" ;;
                esac
diff --git a/m4/log2.m4 b/m4/log2.m4
index ecda18e840..d7e6d3a6e8 100644
--- a/m4/log2.m4
+++ b/m4/log2.m4
@@ -1,4 +1,4 @@
-# log2.m4 serial 3
+# log2.m4 serial 4
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -81,6 +81,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log2_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log2_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log2_ieee="guessing no" ;;
                esac
@@ -161,8 +163,10 @@ int main ()
         [gl_cv_func_log2_works=yes],
         [gl_cv_func_log2_works=no],
         [case "$host_os" in
-           cygwin* | osf*) gl_cv_func_log2_works="guessing no";;
-           *)              gl_cv_func_log2_works="guessing yes";;
+           cygwin* | osf*) gl_cv_func_log2_works="guessing no" ;;
+                           # Guess yes on native Windows.
+           mingw*)         gl_cv_func_log2_works="guessing yes" ;;
+           *)              gl_cv_func_log2_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log2f.m4 b/m4/log2f.m4
index 1743d3c41a..e65db5455c 100644
--- a/m4/log2f.m4
+++ b/m4/log2f.m4
@@ -1,4 +1,4 @@
-# log2f.m4 serial 3
+# log2f.m4 serial 4
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -82,6 +82,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_log2f_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_log2f_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_log2f_ieee="guessing no" ;;
                esac
@@ -168,8 +170,10 @@ int main ()
         [gl_cv_func_log2f_works=yes],
         [gl_cv_func_log2f_works=no],
         [case "$host_os" in
-           cygwin* | osf*) gl_cv_func_log2f_works="guessing no";;
-           *)              gl_cv_func_log2f_works="guessing yes";;
+           cygwin* | osf*) gl_cv_func_log2f_works="guessing no" ;;
+                           # Guess yes on native Windows.
+           mingw*)         gl_cv_func_log2f_works="guessing yes" ;;
+           *)              gl_cv_func_log2f_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/log2l.m4 b/m4/log2l.m4
index 1497d91f92..fad929548e 100644
--- a/m4/log2l.m4
+++ b/m4/log2l.m4
@@ -1,4 +1,4 @@
-# log2l.m4 serial 1
+# log2l.m4 serial 2
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -100,8 +100,10 @@ int main ()
         [gl_cv_func_log2l_works=yes],
         [gl_cv_func_log2l_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_log2l_works="guessing no";;
-           *)    gl_cv_func_log2l_works="guessing yes";;
+           osf*)   gl_cv_func_log2l_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_log2l_works="guessing yes" ;;
+           *)      gl_cv_func_log2l_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/logb.m4 b/m4/logb.m4
index 1e0fb30982..1f6a7deb90 100644
--- a/m4/logb.m4
+++ b/m4/logb.m4
@@ -1,4 +1,4 @@
-# logb.m4 serial 6
+# logb.m4 serial 7
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -117,8 +117,17 @@ int main ()
         [gl_cv_func_logb_works=yes],
         [gl_cv_func_logb_works=no],
         [case "$host_os" in
-           *gnu* | solaris* | cygwin*) gl_cv_func_logb_works="guessing no";;
-           *)                          gl_cv_func_logb_works="guessing yes";;
+           *gnu* | solaris* | cygwin*) gl_cv_func_logb_works="guessing no" ;;
+           mingw*) # Guess yes on MSVC, no on mingw.
+             AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+               ],
+               [gl_cv_func_logb_works="guessing yes"],
+               [gl_cv_func_logb_works="guessing no"])
+             ;;
+           *) gl_cv_func_logb_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/logbf.m4 b/m4/logbf.m4
index 6423644d14..7913dbad1b 100644
--- a/m4/logbf.m4
+++ b/m4/logbf.m4
@@ -1,4 +1,4 @@
-# logbf.m4 serial 1
+# logbf.m4 serial 2
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -73,8 +73,17 @@ int main ()
         [gl_cv_func_logbf_works=yes],
         [gl_cv_func_logbf_works=no],
         [case "$host_os" in
-           *gnu* | solaris*) gl_cv_func_logbf_works="guessing no";;
-           *)                gl_cv_func_logbf_works="guessing yes";;
+           *gnu* | solaris*) gl_cv_func_logbf_works="guessing no" ;;
+           mingw*) # Guess yes on MSVC, no on mingw.
+             AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+               ],
+               [gl_cv_func_logbf_works="guessing yes"],
+               [gl_cv_func_logbf_works="guessing no"])
+             ;;
+           *) gl_cv_func_logbf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/logbl.m4 b/m4/logbl.m4
index 5e236f5de6..42e04f5234 100644
--- a/m4/logbl.m4
+++ b/m4/logbl.m4
@@ -1,4 +1,4 @@
-# logbl.m4 serial 3
+# logbl.m4 serial 4
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -107,8 +107,10 @@ int main ()
         [gl_cv_func_logbl_works=yes],
         [gl_cv_func_logbl_works=no],
         [case "$host_os" in
-           *gnu* | solaris*) gl_cv_func_logbl_works="guessing no";;
-           *)                gl_cv_func_logbl_works="guessing yes";;
+           *gnu* | solaris*) gl_cv_func_logbl_works="guessing no" ;;
+                             # Guess yes on native Windows.
+           mingw*)           gl_cv_func_logbl_works="guessing yes" ;;
+           *)                gl_cv_func_logbl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/logf.m4 b/m4/logf.m4
index d4dcfb0b54..096c679fb2 100644
--- a/m4/logf.m4
+++ b/m4/logf.m4
@@ -1,4 +1,4 @@
-# logf.m4 serial 7
+# logf.m4 serial 8
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -70,6 +70,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_logf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_logf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_logf_ieee="guessing no" ;;
                esac
@@ -123,8 +125,10 @@ int main ()
         [gl_cv_func_logf_works=yes],
         [gl_cv_func_logf_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_logf_works="guessing no";;
-           *)    gl_cv_func_logf_works="guessing yes";;
+           osf*)   gl_cv_func_logf_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_logf_works="guessing yes" ;;
+           *)      gl_cv_func_logf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/logl.m4 b/m4/logl.m4
index 4d1580daba..b12bfb0580 100644
--- a/m4/logl.m4
+++ b/m4/logl.m4
@@ -1,4 +1,4 @@
-# logl.m4 serial 9
+# logl.m4 serial 10
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -126,8 +126,10 @@ int main ()
         [gl_cv_func_logl_works=yes],
         [gl_cv_func_logl_works=no],
         [case "$host_os" in
-           osf*) gl_cv_func_logl_works="guessing no";;
-           *)    gl_cv_func_logl_works="guessing yes";;
+           osf*)   gl_cv_func_logl_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_logl_works="guessing yes" ;;
+           *)      gl_cv_func_logl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/lstat.m4 b/m4/lstat.m4
index 931f3b2727..0b6e5d70cb 100644
--- a/m4/lstat.m4
+++ b/m4/lstat.m4
@@ -1,4 +1,4 @@
-# serial 28
+# serial 29
 
 # Copyright (C) 1997-2001, 2003-2017 Free Software Foundation, Inc.
 #
@@ -55,6 +55,9 @@ AC_DEFUN([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK],
           *-gnu*)
             # Guess yes on glibc systems.
             gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          mingw*)
+            # Guess no on native Windows.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;;
           *)
             # If we don't know, assume the worst.
             gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;;
diff --git a/m4/mbrtowc.m4 b/m4/mbrtowc.m4
index 4982b4bf9e..216594eb94 100644
--- a/m4/mbrtowc.m4
+++ b/m4/mbrtowc.m4
@@ -1,4 +1,4 @@
-# mbrtowc.m4 serial 28  -*- coding: utf-8 -*-
+# mbrtowc.m4 serial 29  -*- coding: utf-8 -*-
 dnl Copyright (C) 2001-2002, 2004-2005, 2008-2017 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -563,9 +563,11 @@ AC_DEFUN([gl_MBRTOWC_EMPTY_INPUT],
       dnl is present.
 changequote(,)dnl
       case "$host_os" in
-                     # Guess no on AIX and glibc systems.
+                    # Guess no on AIX and glibc systems.
         aix* | *-gnu*)
                     gl_cv_func_mbrtowc_empty_input="guessing no" ;;
+                    # Guess yes on native Windows.
+        mingw*)     gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
         *)          gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
       esac
 changequote([,])dnl
@@ -592,6 +594,7 @@ dnl https://sourceware.org/bugzilla/show_bug.cgi?id=19932
 
 AC_DEFUN([gl_MBRTOWC_C_LOCALE],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether the C locale is free of encoding errors],
     [gl_cv_C_locale_sans_EILSEQ],
     [
@@ -622,7 +625,12 @@ AC_DEFUN([gl_MBRTOWC_C_LOCALE],
           ]])],
       [gl_cv_C_locale_sans_EILSEQ=yes],
       [gl_cv_C_locale_sans_EILSEQ=no],
-      [:])])
+      [case "$host_os" in
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_C_locale_sans_EILSEQ="guessing yes" ;;
+       esac
+      ])
+    ])
 ])
 
 # Prerequisites of lib/mbrtowc.c.
diff --git a/m4/mkdir.m4 b/m4/mkdir.m4
index 5eec622eff..fa15b15789 100644
--- a/m4/mkdir.m4
+++ b/m4/mkdir.m4
@@ -1,4 +1,4 @@
-# serial 11
+# serial 12
 
 # Copyright (C) 2001, 2003-2004, 2006, 2008-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -25,6 +25,15 @@ AC_DEFUN([gl_FUNC_MKDIR],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
+                 # Guess yes on MSVC, no on mingw.
+         mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                   ],
+                   [gl_cv_func_mkdir_trailing_slash_works="guessing yes"],
+                   [gl_cv_func_mkdir_trailing_slash_works="guessing no"])
+                 ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_mkdir_trailing_slash_works="guessing no" ;;
        esac
@@ -51,6 +60,8 @@ AC_DEFUN([gl_FUNC_MKDIR],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_mkdir_trailing_dot_works="guessing no" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_mkdir_trailing_dot_works="guessing no" ;;
        esac
diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index 31b9b8bb67..82f02864f3 100644
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,4 +1,4 @@
-#serial 23
+#serial 24
 
 # Copyright (C) 2001, 2003-2007, 2009-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -59,6 +59,8 @@ AC_DEFUN([gl_FUNC_MKSTEMP],
           [case "$host_os" in
                      # Guess yes on glibc systems.
              *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
+                     # Guess no on native Windows.
+             mingw*) gl_cv_func_working_mkstemp="guessing no" ;;
                      # If we don't know, assume the worst.
              *)      gl_cv_func_working_mkstemp="guessing no" ;;
            esac
diff --git a/m4/mktime.m4 b/m4/mktime.m4
index 31da65e8b2..85666844e2 100644
--- a/m4/mktime.m4
+++ b/m4/mktime.m4
@@ -1,4 +1,4 @@
-# serial 28
+# serial 29
 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2017 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -25,6 +25,7 @@ dnl Test whether mktime works. Set gl_cv_func_working_mktime.
 AC_DEFUN([gl_FUNC_MKTIME_WORKS],
 [
   AC_REQUIRE([gl_TIME_T_IS_SIGNED])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
 
   dnl We don't use AC_FUNC_MKTIME any more, because it is no longer maintained
   dnl in Autoconf and because it invokes AC_LIBOBJ.
@@ -239,7 +240,12 @@ main ()
 }]])],
        [gl_cv_func_working_mktime=yes],
        [gl_cv_func_working_mktime=no],
-       [gl_cv_func_working_mktime="guessing no"])
+       [case "$host_os" in
+                  # Guess no on native Windows.
+          mingw*) gl_cv_func_working_mktime="guessing no" ;;
+          *)      gl_cv_func_working_mktime="guessing no" ;;
+        esac
+       ])
     ])
 ])
 
diff --git a/m4/modf.m4 b/m4/modf.m4
index 8a6f708e8b..7cb8c3d60f 100644
--- a/m4/modf.m4
+++ b/m4/modf.m4
@@ -1,4 +1,4 @@
-# modf.m4 serial 3
+# modf.m4 serial 4
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -63,6 +63,15 @@ int main (int argc, char *argv[])
             [case "$host_os" in
                        # Guess yes on glibc systems.
                *-gnu*) gl_cv_func_modf_ieee="guessing yes" ;;
+                       # Guess yes on MSVC, no on mingw.
+               mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                         ],
+                         [gl_cv_func_modf_ieee="guessing yes"],
+                         [gl_cv_func_modf_ieee="guessing no"])
+                       ;;
                        # If we don't know, assume the worst.
                *)      gl_cv_func_modf_ieee="guessing no" ;;
              esac
diff --git a/m4/modff.m4 b/m4/modff.m4
index b461018299..e32d5372eb 100644
--- a/m4/modff.m4
+++ b/m4/modff.m4
@@ -1,4 +1,4 @@
-# modff.m4 serial 5
+# modff.m4 serial 6
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -71,6 +71,15 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_modff_ieee="guessing yes" ;;
+                         # Guess yes on MSVC, no on mingw.
+                 mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                           ],
+                           [gl_cv_func_modff_ieee="guessing yes"],
+                           [gl_cv_func_modff_ieee="guessing no"])
+                         ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_modff_ieee="guessing no" ;;
                esac
diff --git a/m4/modfl.m4 b/m4/modfl.m4
index 1cba70f6d1..152109f77a 100644
--- a/m4/modfl.m4
+++ b/m4/modfl.m4
@@ -1,4 +1,4 @@
-# modfl.m4 serial 3
+# modfl.m4 serial 4
 dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -65,6 +65,15 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_modfl_ieee="guessing yes" ;;
+                         # Guess yes on MSVC, no on mingw.
+                 mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                           ],
+                           [gl_cv_func_modfl_ieee="guessing yes"],
+                           [gl_cv_func_modfl_ieee="guessing no"])
+                         ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_modfl_ieee="guessing no" ;;
                esac
diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index 5590696b4f..aa1ea9cbbd 100644
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -1,4 +1,4 @@
-# serial 36
+# serial 37
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
@@ -106,6 +106,8 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
        [case "$host_os" in dnl ((
           linux*) # Guess it halfway works when the kernel is Linux.
             gl_cv_func_nanosleep='guessing no (mishandles large arguments)' ;;
+          mingw*) # Guess no on native Windows.
+            gl_cv_func_nanosleep='guessing no' ;;
           *)      # If we don't know, assume the worst.
             gl_cv_func_nanosleep='guessing no' ;;
         esac
diff --git a/m4/perror.m4 b/m4/perror.m4
index 752cb44be1..ea3cdc74a7 100644
--- a/m4/perror.m4
+++ b/m4/perror.m4
@@ -1,4 +1,4 @@
-# perror.m4 serial 6
+# perror.m4 serial 7
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -10,6 +10,7 @@ AC_DEFUN([gl_FUNC_PERROR],
   AC_REQUIRE([gl_HEADER_ERRNO_H])
   AC_REQUIRE([gl_FUNC_STRERROR_R])
   AC_REQUIRE([gl_FUNC_STRERROR_0])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   dnl We intentionally do not check for the broader REPLACE_STRERROR_R,
   dnl since on glibc systems, strerror_r is replaced only for signature
   dnl issues, and perror is just fine.  Rather, we only want to
@@ -46,13 +47,18 @@ AC_DEFUN([gl_FUNC_PERROR],
             fi
             rm -rf conftest.txt1 conftest.txt2],
            [gl_cv_func_perror_works=no],
-           [dnl Guess no when cross-compiling.
-            gl_cv_func_perror_works="guessing no"
+           [case "$host_os" in
+                      # Guess yes on native Windows.
+              mingw*) gl_cv_func_perror_works="guessing yes" ;;
+                      # Otherwise guess no.
+              *)      gl_cv_func_perror_works="guessing no" ;;
+            esac
            ])
         ])
-      if test "$gl_cv_func_perror_works" != yes; then
-        REPLACE_PERROR=1
-      fi
+      case "$gl_cv_func_perror_works" in
+        *yes) ;;
+        *) REPLACE_PERROR=1 ;;
+      esac
       ;;
     *)
       dnl The system's perror() probably inherits the bugs in the
diff --git a/m4/popen.m4 b/m4/popen.m4
index 101e924db0..d6138a1885 100644
--- a/m4/popen.m4
+++ b/m4/popen.m4
@@ -1,4 +1,4 @@
-# popen.m4 serial 5
+# popen.m4 serial 6
 dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_POPEN],
 [
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_FUNCS_ONCE([popen])
   if test $ac_cv_func_popen = no; then
     HAVE_POPEN=0
@@ -30,12 +31,19 @@ AC_DEFUN([gl_FUNC_POPEN],
              ]])],
           [gl_cv_func_popen_works=yes],
           [gl_cv_func_popen_works=no],
-          dnl For now, only cygwin 1.5 or older is known to be broken.
-          [gl_cv_func_popen_works='guessing yes'])
+          [case "$host_os" in
+                      # For now, only cygwin 1.5 or older is known to be broken.
+             cygwin*) gl_cv_func_popen_works="guessing no" ;;
+                      # Guess yes on native Windows.
+             mingw*)  gl_cv_func_popen_works="guessing yes" ;;
+             *)       gl_cv_func_popen_works="guessing yes" ;;
+           esac
+          ])
       ])
-    if test "$gl_cv_func_popen_works" = no; then
-      REPLACE_POPEN=1
-    fi
+    case "$gl_cv_func_popen_works" in
+      *yes) ;;
+      *) REPLACE_POPEN=1 ;;
+    esac
   fi
 ])
 
diff --git a/m4/posix_spawn.m4 b/m4/posix_spawn.m4
index 7bc38ba33d..40131dcddf 100644
--- a/m4/posix_spawn.m4
+++ b/m4/posix_spawn.m4
@@ -1,4 +1,4 @@
-# posix_spawn.m4 serial 11
+# posix_spawn.m4 serial 12
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -430,8 +430,10 @@ int main ()
          [gl_cv_func_posix_spawn_file_actions_addclose_works=no],
          [# Guess no on Solaris, yes otherwise.
           case "$host_os" in
-            solaris*) gl_cv_func_posix_spawn_file_actions_addclose_works="guessing no";;
-            *)        gl_cv_func_posix_spawn_file_actions_addclose_works="guessing yes";;
+            solaris*) gl_cv_func_posix_spawn_file_actions_addclose_works="guessing no" ;;
+                      # Guess no on native Windows.
+            mingw*)   gl_cv_func_posix_spawn_file_actions_addclose_works="guessing no" ;;
+            *)        gl_cv_func_posix_spawn_file_actions_addclose_works="guessing yes" ;;
           esac
          ])
       ])
@@ -472,6 +474,8 @@ int main ()
          [# Guess no on Solaris, yes otherwise.
           case "$host_os" in
             solaris*) gl_cv_func_posix_spawn_file_actions_adddup2_works="guessing no";;
+                      # Guess no on native Windows.
+            mingw*)   gl_cv_func_posix_spawn_file_actions_adddup2_works="guessing no" ;;
             *)        gl_cv_func_posix_spawn_file_actions_adddup2_works="guessing yes";;
           esac
          ])
@@ -515,6 +519,8 @@ int main ()
          [# Guess no on Solaris, yes otherwise.
           case "$host_os" in
             solaris*) gl_cv_func_posix_spawn_file_actions_addopen_works="guessing no";;
+                      # Guess no on native Windows.
+            mingw*)   gl_cv_func_posix_spawn_file_actions_addopen_works="guessing no" ;;
             *)        gl_cv_func_posix_spawn_file_actions_addopen_works="guessing yes";;
           esac
          ])
diff --git a/m4/printf.m4 b/m4/printf.m4
index 37c9a3c576..d3ee2531de 100644
--- a/m4/printf.m4
+++ b/m4/printf.m4
@@ -1,4 +1,4 @@
-# printf.m4 serial 54
+# printf.m4 serial 55
 dnl Copyright (C) 2003, 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -58,8 +58,8 @@ int main ()
         [gl_cv_func_printf_sizes_c99=yes],
         [gl_cv_func_printf_sizes_c99=no],
         [
-changequote(,)dnl
          case "$host_os" in
+changequote(,)dnl
                                  # Guess yes on glibc systems.
            *-gnu*)               gl_cv_func_printf_sizes_c99="guessing yes";;
                                  # Guess yes on FreeBSD >= 5.
@@ -79,10 +79,19 @@ changequote(,)dnl
            netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
                                  gl_cv_func_printf_sizes_c99="guessing no";;
            netbsd*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_sizes_c99="guessing yes"],
+                                   [gl_cv_func_printf_sizes_c99="guessing no"])
+                                 ;;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_printf_sizes_c99="guessing no";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -122,14 +131,19 @@ int main ()
 }]])],
         [gl_cv_func_printf_long_double=yes],
         [gl_cv_func_printf_long_double=no],
-        [
-changequote(,)dnl
-         case "$host_os" in
-           beos*)        gl_cv_func_printf_long_double="guessing no";;
-           mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
-           *)            gl_cv_func_printf_long_double="guessing yes";;
+        [case "$host_os" in
+           beos*)  gl_cv_func_printf_long_double="guessing no";;
+                   # Guess yes on MSVC, no on mingw.
+           mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                     ],
+                     [gl_cv_func_printf_long_double="guessing yes"],
+                     [gl_cv_func_printf_long_double="guessing no"])
+                   ;;
+           *)      gl_cv_func_printf_long_double="guessing yes";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -217,8 +231,8 @@ int main ()
         [gl_cv_func_printf_infinite=yes],
         [gl_cv_func_printf_infinite=no],
         [
-changequote(,)dnl
          case "$host_os" in
+changequote(,)dnl
                                  # Guess yes on glibc systems.
            *-gnu*)               gl_cv_func_printf_infinite="guessing yes";;
                                  # Guess yes on FreeBSD >= 6.
@@ -236,10 +250,19 @@ changequote(,)dnl
            netbsd*)              gl_cv_func_printf_infinite="guessing yes";;
                                  # Guess yes on BeOS.
            beos*)                gl_cv_func_printf_infinite="guessing yes";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_infinite="guessing yes"],
+                                   [gl_cv_func_printf_infinite="guessing no"])
+                                 ;;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_printf_infinite="guessing no";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -419,13 +442,12 @@ int main ()
 }]])],
             [gl_cv_func_printf_infinite_long_double=yes],
             [gl_cv_func_printf_infinite_long_double=no],
-            [
-changequote(,)dnl
-             case "$host_cpu" in
+            [case "$host_cpu" in
                                      # Guess no on ia64, x86_64, i386.
                ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
                *)
                  case "$host_os" in
+changequote(,)dnl
                                          # Guess yes on glibc systems.
                    *-gnu*)               gl_cv_func_printf_infinite_long_double="guessing yes";;
                                          # Guess yes on FreeBSD >= 6.
@@ -434,12 +456,21 @@ changequote(,)dnl
                                          # Guess yes on HP-UX >= 11.
                    hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
                    hpux*)                gl_cv_func_printf_infinite_long_double="guessing yes";;
+changequote([,])dnl
+                                         # Guess yes on MSVC, no on mingw.
+                   mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                           ],
+                                           [gl_cv_func_printf_infinite_long_double="guessing yes"],
+                                           [gl_cv_func_printf_infinite_long_double="guessing no"])
+                                         ;;
                                          # If we don't know, assume the worst.
                    *)                    gl_cv_func_printf_infinite_long_double="guessing no";;
                  esac
                  ;;
              esac
-changequote([,])dnl
             ])
         ])
       ;;
@@ -535,6 +566,8 @@ int main ()
                [gl_cv_func_printf_directive_a="guessing yes"],
                [gl_cv_func_printf_directive_a="guessing no"])
              ;;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_printf_directive_a="guessing no";;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_printf_directive_a="guessing no";;
          esac
@@ -577,8 +610,8 @@ int main ()
         [gl_cv_func_printf_directive_f=yes],
         [gl_cv_func_printf_directive_f=no],
         [
-changequote(,)dnl
          case "$host_os" in
+changequote(,)dnl
                                  # Guess yes on glibc systems.
            *-gnu*)               gl_cv_func_printf_directive_f="guessing yes";;
                                  # Guess yes on FreeBSD >= 6.
@@ -590,10 +623,19 @@ changequote(,)dnl
                                  # Guess yes on Solaris >= 2.10.
            solaris2.[1-9][0-9]*) gl_cv_func_printf_directive_f="guessing yes";;
            solaris*)             gl_cv_func_printf_directive_f="guessing no";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_directive_f="guessing yes"],
+                                   [gl_cv_func_printf_directive_f="guessing no"])
+                                 ;;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_printf_directive_f="guessing no";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -645,13 +687,11 @@ int main ()
 }]])],
         [gl_cv_func_printf_directive_n=yes],
         [gl_cv_func_printf_directive_n=no],
-        [
-changequote(,)dnl
-         case "$host_os" in
+        [case "$host_os" in
+                   # Guess no on native Windows.
            mingw*) gl_cv_func_printf_directive_n="guessing no";;
            *)      gl_cv_func_printf_directive_n="guessing yes";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -726,12 +766,14 @@ int main ()
         [
 changequote(,)dnl
          case "$host_os" in
-           openbsd*)        gl_cv_func_printf_directive_ls="guessing no";;
-           irix*)           gl_cv_func_printf_directive_ls="guessing no";;
-           solaris*)        gl_cv_func_printf_directive_ls="guessing no";;
-           cygwin*)         gl_cv_func_printf_directive_ls="guessing no";;
-           beos* | haiku*)  gl_cv_func_printf_directive_ls="guessing no";;
-           *)               gl_cv_func_printf_directive_ls="guessing yes";;
+           openbsd*)       gl_cv_func_printf_directive_ls="guessing no";;
+           irix*)          gl_cv_func_printf_directive_ls="guessing no";;
+           solaris*)       gl_cv_func_printf_directive_ls="guessing no";;
+           cygwin*)        gl_cv_func_printf_directive_ls="guessing no";;
+           beos* | haiku*) gl_cv_func_printf_directive_ls="guessing no";;
+                           # Guess yes on native Windows.
+           mingw*)         gl_cv_func_printf_directive_ls="guessing yes";;
+           *)              gl_cv_func_printf_directive_ls="guessing yes";;
          esac
 changequote([,])dnl
         ])
@@ -770,6 +812,7 @@ changequote(,)dnl
            netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
                          gl_cv_func_printf_positions="guessing no";;
            beos*)        gl_cv_func_printf_positions="guessing no";;
+                         # Guess no on native Windows.
            mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
            *)            gl_cv_func_printf_positions="guessing yes";;
          esac
@@ -808,6 +851,7 @@ changequote(,)dnl
          case "$host_os" in
            cygwin*)      gl_cv_func_printf_flag_grouping="guessing no";;
            netbsd*)      gl_cv_func_printf_flag_grouping="guessing no";;
+                         # Guess no on native Windows.
            mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
            *)            gl_cv_func_printf_flag_grouping="guessing yes";;
          esac
@@ -850,6 +894,8 @@ changequote(,)dnl
            hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
                     # Guess no on HP-UX 10 and older.
            hpux*)   gl_cv_func_printf_flag_leftadjust="guessing no";;
+                    # Guess yes on native Windows.
+           mingw*)  gl_cv_func_printf_flag_leftadjust="guessing yes";;
                     # Guess yes otherwise.
            *)       gl_cv_func_printf_flag_leftadjust="guessing yes";;
          esac
@@ -893,6 +939,8 @@ changequote(,)dnl
            *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
                    # Guess yes on BeOS.
            beos*)  gl_cv_func_printf_flag_zero="guessing yes";;
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_printf_flag_zero="guessing no";;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_printf_flag_zero="guessing no";;
          esac
@@ -1160,6 +1208,8 @@ changequote(,)dnl
            netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
                                  # Guess yes on BeOS.
            beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_snprintf_truncation_c99="guessing no";;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_snprintf_truncation_c99="guessing no";;
          esac
@@ -1223,9 +1273,8 @@ int main ()
 }]])],
         [gl_cv_func_snprintf_retval_c99=yes],
         [gl_cv_func_snprintf_retval_c99=no],
-        [
+        [case "$host_os" in
 changequote(,)dnl
-         case "$host_os" in
                                  # Guess yes on glibc systems.
            *-gnu*)               gl_cv_func_snprintf_retval_c99="guessing yes";;
                                  # Guess yes on FreeBSD >= 5.
@@ -1250,10 +1299,19 @@ changequote(,)dnl
            netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
                                  # Guess yes on BeOS.
            beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_snprintf_retval_c99="guessing yes"],
+                                   [gl_cv_func_snprintf_retval_c99="guessing no"])
+                                 ;;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_snprintf_retval_c99="guessing no";;
          esac
-changequote([,])dnl
         ])
     ])
 ])
@@ -1333,6 +1391,8 @@ changequote(,)dnl
            netbsd*)              gl_cv_func_snprintf_directive_n="guessing yes";;
                                  # Guess yes on BeOS.
            beos*)                gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_snprintf_directive_n="guessing no";;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_snprintf_directive_n="guessing no";;
          esac
@@ -1349,6 +1409,7 @@ dnl Result is gl_cv_func_snprintf_size1.
 AC_DEFUN([gl_SNPRINTF_SIZE1],
 [
   AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_REQUIRE([gl_SNPRINTF_PRESENCE])
   AC_CACHE_CHECK([whether snprintf respects a size of 1],
     [gl_cv_func_snprintf_size1],
@@ -1378,7 +1439,12 @@ int main()
 }]])],
         [gl_cv_func_snprintf_size1=yes],
         [gl_cv_func_snprintf_size1=no],
-        [gl_cv_func_snprintf_size1="guessing yes"])
+        [case "$host_os" in
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_snprintf_size1="guessing yes" ;;
+           *)      gl_cv_func_snprintf_size1="guessing yes" ;;
+         esac
+        ])
     ])
 ])
 
@@ -1474,7 +1540,7 @@ changequote(,)dnl
            netbsd*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
                                  # Guess yes on BeOS.
            beos*)                gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on mingw.
+                                 # Guess yes on native Windows.
            mingw* | pw*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
                                  # If we don't know, assume the worst.
            *)                    gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
diff --git a/m4/ptsname_r.m4 b/m4/ptsname_r.m4
index 687872c1f1..362e1003a9 100644
--- a/m4/ptsname_r.m4
+++ b/m4/ptsname_r.m4
@@ -1,4 +1,4 @@
-# ptsname_r.m4 serial 3
+# ptsname_r.m4 serial 4
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -68,10 +68,19 @@ AC_DEFUN([gl_PREREQ_PTSNAME_R], [
        [gl_cv_func_isatty_sets_errno=yes],
        [gl_cv_func_isatty_sets_errno=no],
        [case "$host_os" in
-          irix* | solaris* | mingw*)
-            gl_cv_func_isatty_sets_errno="guessing no";;
+          irix* | solaris*)
+            gl_cv_func_isatty_sets_errno="guessing no" ;;
+          mingw*) # Guess yes on mingw, no on MSVC.
+            AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+              ],
+              [gl_cv_func_isatty_sets_errno="guessing yes"],
+              [gl_cv_func_isatty_sets_errno="guessing no"])
+            ;;
           *)
-            gl_cv_func_isatty_sets_errno="guessing yes";;
+            gl_cv_func_isatty_sets_errno="guessing yes" ;;
         esac
        ])
     ])
diff --git a/m4/putenv.m4 b/m4/putenv.m4
index a8e3ab33dc..08ae41697a 100644
--- a/m4/putenv.m4
+++ b/m4/putenv.m4
@@ -1,4 +1,4 @@
-# putenv.m4 serial 20
+# putenv.m4 serial 21
 dnl Copyright (C) 2002-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -36,6 +36,8 @@ AC_DEFUN([gl_FUNC_PUTENV],
              [case "$host_os" in
                         # Guess yes on glibc systems.
                 *-gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
+                        # Guess no on native Windows.
+                mingw*) gl_cv_func_svid_putenv="guessing no" ;;
                         # If we don't know, assume the worst.
                 *)      gl_cv_func_svid_putenv="guessing no" ;;
               esac
diff --git a/m4/regex.m4 b/m4/regex.m4
index 61ff09872b..23fe46a16c 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-# serial 66
+# serial 67
 
 # Copyright (C) 1996-2001, 2003-2017 Free Software Foundation, Inc.
 #
@@ -13,6 +13,7 @@ AC_PREREQ([2.50])
 
 AC_DEFUN([gl_REGEX],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_ARG_WITH([included-regex],
     [AS_HELP_STRING([--without-included-regex],
                     [don't compile regex; this is the default on systems
@@ -226,13 +227,19 @@ AC_DEFUN([gl_REGEX],
 
             return result;
           ]])],
-       [gl_cv_func_re_compile_pattern_working=yes],
-       [gl_cv_func_re_compile_pattern_working=no],
-       dnl When crosscompiling, assume it is not working.
-       [gl_cv_func_re_compile_pattern_working=no])])
-    case $gl_cv_func_re_compile_pattern_working in #(
-    yes) ac_use_included_regex=no;; #(
-    no) ac_use_included_regex=yes;;
+        [gl_cv_func_re_compile_pattern_working=yes],
+        [gl_cv_func_re_compile_pattern_working=no],
+        [case "$host_os" in
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_re_compile_pattern_working="guessing no" ;;
+                   # Otherwise, assume it is not working.
+           *)      gl_cv_func_re_compile_pattern_working="guessing no" ;;
+         esac
+        ])
+      ])
+    case "$gl_cv_func_re_compile_pattern_working" in #(
+      *yes) ac_use_included_regex=no;; #(
+      *no) ac_use_included_regex=yes;;
     esac
     ;;
   *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
diff --git a/m4/remainder.m4 b/m4/remainder.m4
index 518cf68a5f..f9a9177513 100644
--- a/m4/remainder.m4
+++ b/m4/remainder.m4
@@ -1,4 +1,4 @@
-# remainder.m4 serial 4
+# remainder.m4 serial 5
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -94,6 +94,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_remainder_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_remainder_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_remainder_ieee="guessing no" ;;
                esac
diff --git a/m4/remainderf.m4 b/m4/remainderf.m4
index 0ddbb3d5fb..fcce7b0808 100644
--- a/m4/remainderf.m4
+++ b/m4/remainderf.m4
@@ -1,4 +1,4 @@
-# remainderf.m4 serial 8
+# remainderf.m4 serial 9
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -97,6 +97,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_remainderf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_remainderf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_remainderf_ieee="guessing no" ;;
                esac
@@ -184,8 +186,10 @@ int main ()
         [gl_cv_func_remainderf_works=yes],
         [gl_cv_func_remainderf_works=no],
         [case "$host_os" in
-           irix*) gl_cv_func_remainderf_works="guessing no";;
-           *)     gl_cv_func_remainderf_works="guessing yes";;
+           irix*)  gl_cv_func_remainderf_works="guessing no" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_remainderf_works="guessing yes" ;;
+           *)      gl_cv_func_remainderf_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/remainderl.m4 b/m4/remainderl.m4
index 3c291e3b7f..294ec093d2 100644
--- a/m4/remainderl.m4
+++ b/m4/remainderl.m4
@@ -1,4 +1,4 @@
-# remainderl.m4 serial 7
+# remainderl.m4 serial 8
 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -102,6 +102,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_remainderl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_remainderl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_remainderl_ieee="guessing no" ;;
                esac
@@ -183,8 +185,10 @@ int main ()
         [gl_cv_func_remainderl_works=yes],
         [gl_cv_func_remainderl_works=no],
         [case "$host_os" in
-           openbsd*) gl_cv_func_remainderl_works="guessing no";;
-           *)        gl_cv_func_remainderl_works="guessing yes";;
+           openbsd*) gl_cv_func_remainderl_works="guessing no" ;;
+                     # Guess yes on native Windows.
+           mingw*)   gl_cv_func_remainderl_works="guessing yes" ;;
+           *)        gl_cv_func_remainderl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/rename.m4 b/m4/rename.m4
index 7c3ffe7c28..9a3730735c 100644
--- a/m4/rename.m4
+++ b/m4/rename.m4
@@ -1,4 +1,4 @@
-# serial 26
+# serial 27
 
 # Copyright (C) 2001, 2003, 2005-2006, 2009-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -57,6 +57,8 @@ AC_DEFUN([gl_FUNC_RENAME],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_rename_slash_dst_works="guessing no" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_rename_slash_dst_works="guessing no" ;;
        esac
@@ -109,6 +111,8 @@ AC_DEFUN([gl_FUNC_RENAME],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_rename_slash_src_works="guessing no" ;;
        esac
@@ -158,6 +162,8 @@ AC_DEFUN([gl_FUNC_RENAME],
            [case "$host_os" in
                       # Guess yes on glibc systems.
               *-gnu*) gl_cv_func_rename_link_works="guessing yes" ;;
+                      # Guess yes on native Windows.
+              mingw*) gl_cv_func_rename_link_works="guessing yes" ;;
                       # If we don't know, assume the worst.
               *)      gl_cv_func_rename_link_works="guessing no" ;;
             esac
@@ -207,6 +213,8 @@ AC_DEFUN([gl_FUNC_RENAME],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_rename_dest_works="guessing yes" ;;
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_rename_dest_works="guessing no" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_rename_dest_works="guessing no" ;;
        esac
diff --git a/m4/rmdir-errno.m4 b/m4/rmdir-errno.m4
index 65fb8a88f9..8ed15462b6 100644
--- a/m4/rmdir-errno.m4
+++ b/m4/rmdir-errno.m4
@@ -1,4 +1,4 @@
-# serial 12
+# serial 13
 
 # Copyright (C) 2000-2001, 2005-2006, 2009-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -12,6 +12,7 @@
 # test runs a test to determine the actual numeric value.
 AC_DEFUN([gl_FUNC_RMDIR_NOTEMPTY],
 [dnl
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CACHE_CHECK([for rmdir-not-empty errno value],
     [gl_cv_func_rmdir_errno_not_empty],
@@ -39,11 +40,16 @@ AC_DEFUN([gl_FUNC_RMDIR_NOTEMPTY],
         ]])],
         [gl_cv_func_rmdir_errno_not_empty=`cat confdir2/errno`],
         [gl_cv_func_rmdir_errno_not_empty='configure error in rmdir-errno.m4'],
-        [gl_cv_func_rmdir_errno_not_empty=ENOTEMPTY])
+        [case "$host_os" in
+                   # Guess ENOTEMPTY = 41 on native Windows.
+           mingw*) gl_cv_func_rmdir_errno_not_empty=ENOTEMPTY ;;
+           *)      gl_cv_func_rmdir_errno_not_empty=ENOTEMPTY ;;
+         esac
+        ])
     ]
   )
 
   AC_DEFINE_UNQUOTED([RMDIR_ERRNO_NOT_EMPTY],
-    $gl_cv_func_rmdir_errno_not_empty,
+    [$gl_cv_func_rmdir_errno_not_empty],
     [the value to which errno is set when rmdir fails on a nonempty directory])
 ])
diff --git a/m4/rmdir.m4 b/m4/rmdir.m4
index f585c27697..37237d2afe 100644
--- a/m4/rmdir.m4
+++ b/m4/rmdir.m4
@@ -1,4 +1,4 @@
-# rmdir.m4 serial 13
+# rmdir.m4 serial 14
 dnl Copyright (C) 2002, 2005, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -35,6 +35,8 @@ AC_DEFUN([gl_FUNC_RMDIR],
        [case "$host_os" in
                   # Guess yes on glibc systems.
           *-gnu*) gl_cv_func_rmdir_works="guessing yes" ;;
+                  # Guess no on native Windows.
+          mingw*) gl_cv_func_rmdir_works="guessing no" ;;
                   # If we don't know, assume the worst.
           *)      gl_cv_func_rmdir_works="guessing no" ;;
         esac
diff --git a/m4/round.m4 b/m4/round.m4
index ede34b29d6..d982e592cd 100644
--- a/m4/round.m4
+++ b/m4/round.m4
@@ -1,4 +1,4 @@
-# round.m4 serial 17
+# round.m4 serial 18
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -60,8 +60,17 @@ int main()
   return (x < 0.5 && round (x) != 0.0);
 }]])], [gl_cv_func_round_works=yes], [gl_cv_func_round_works=no],
         [case "$host_os" in
-           netbsd* | aix*) gl_cv_func_round_works="guessing no";;
-           *)              gl_cv_func_round_works="guessing yes";;
+           netbsd* | aix*) gl_cv_func_round_works="guessing no" ;;
+                           # Guess yes on MSVC, no on mingw.
+           mingw*)         AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                             ],
+                             [gl_cv_func_round_works="guessing yes"],
+                             [gl_cv_func_round_works="guessing no"])
+                           ;;
+           *)              gl_cv_func_round_works="guessing yes" ;;
          esac
         ])
         LIBS="$save_LIBS"
@@ -106,6 +115,15 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_round_ieee="guessing yes" ;;
+                         # Guess yes on MSVC, no on mingw.
+                 mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                           ],
+                           [gl_cv_func_round_ieee="guessing yes"],
+                           [gl_cv_func_round_ieee="guessing no"])
+                         ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_round_ieee="guessing no" ;;
                esac
diff --git a/m4/roundf.m4 b/m4/roundf.m4
index f623b554a7..0baacc9f51 100644
--- a/m4/roundf.m4
+++ b/m4/roundf.m4
@@ -1,4 +1,4 @@
-# roundf.m4 serial 18
+# roundf.m4 serial 19
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -57,8 +57,16 @@ int main()
   return (x < 0.5f && roundf (x) != 0.0f);
 }]])], [gl_cv_func_roundf_works=yes], [gl_cv_func_roundf_works=no],
         [case "$host_os" in
-           mingw*) gl_cv_func_roundf_works="guessing no";;
-           *)      gl_cv_func_roundf_works="guessing yes";;
+                   # Guess yes on MSVC, no on mingw.
+           mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                     ],
+                     [gl_cv_func_roundf_works="guessing yes"],
+                     [gl_cv_func_roundf_works="guessing no"])
+                   ;;
+           *)      gl_cv_func_roundf_works="guessing yes" ;;
          esac
         ])
         LIBS="$save_LIBS"
@@ -107,6 +115,15 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_roundf_ieee="guessing yes" ;;
+                         # Guess yes on MSVC, no on mingw.
+                 mingw*) AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                           ],
+                           [gl_cv_func_roundf_ieee="guessing yes"],
+                           [gl_cv_func_roundf_ieee="guessing no"])
+                         ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_roundf_ieee="guessing no" ;;
                esac
diff --git a/m4/roundl.m4 b/m4/roundl.m4
index 7f8c03b747..47db26b9cc 100644
--- a/m4/roundl.m4
+++ b/m4/roundl.m4
@@ -1,4 +1,4 @@
-# roundl.m4 serial 15
+# roundl.m4 serial 16
 dnl Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -66,6 +66,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_roundl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_roundl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_roundl_ieee="guessing no" ;;
                esac
diff --git a/m4/signbit.m4 b/m4/signbit.m4
index f387ee91d6..db60ab724a 100644
--- a/m4/signbit.m4
+++ b/m4/signbit.m4
@@ -1,4 +1,4 @@
-# signbit.m4 serial 14
+# signbit.m4 serial 15
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -31,6 +31,8 @@ AC_DEFUN([gl_SIGNBIT],
         [case "$host_os" in
                    # Guess yes on glibc systems.
            *-gnu*) gl_cv_func_signbit="guessing yes" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_signbit="guessing yes" ;;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_signbit="guessing no" ;;
          esac
@@ -60,6 +62,13 @@ AC_DEFUN([gl_SIGNBIT],
         [case "$host_os" in
                    # Guess yes on glibc systems.
            *-gnu*) gl_cv_func_signbit_gcc="guessing yes" ;;
+                   # Guess yes on mingw, no on MSVC.
+           mingw*) if test -n "$GCC"; then
+                     gl_cv_func_signbit_gcc="guessing yes"
+                   else
+                     gl_cv_func_signbit_gcc="guessing no"
+                   fi
+                   ;;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_signbit_gcc="guessing no" ;;
          esac
diff --git a/m4/sleep.m4 b/m4/sleep.m4
index 2d92ea8e2d..e2d27be275 100644
--- a/m4/sleep.m4
+++ b/m4/sleep.m4
@@ -1,4 +1,4 @@
-# sleep.m4 serial 7
+# sleep.m4 serial 8
 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -48,6 +48,8 @@ handle_alarm (int sig)
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_sleep_works="guessing yes" ;;
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_sleep_works="guessing no" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_sleep_works="guessing no" ;;
        esac
diff --git a/m4/sqrtl.m4 b/m4/sqrtl.m4
index 1c2b0e11da..e114da89cb 100644
--- a/m4/sqrtl.m4
+++ b/m4/sqrtl.m4
@@ -1,4 +1,4 @@
-# sqrtl.m4 serial 9
+# sqrtl.m4 serial 10
 dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -154,8 +154,10 @@ int main ()
         [gl_cv_func_sqrtl_works=yes],
         [gl_cv_func_sqrtl_works=no],
         [case "$host_os" in
-           openbsd*) gl_cv_func_sqrtl_works="guessing no";;
-           *)        gl_cv_func_sqrtl_works="guessing yes";;
+           openbsd*) gl_cv_func_sqrtl_works="guessing no" ;;
+                     # Guess yes on native Windows.
+           mingw*)   gl_cv_func_sqrtl_works="guessing yes" ;;
+           *)        gl_cv_func_sqrtl_works="guessing yes" ;;
          esac
         ])
     ])
diff --git a/m4/stdint.m4 b/m4/stdint.m4
index 4ac854d519..4bf3e47451 100644
--- a/m4/stdint.m4
+++ b/m4/stdint.m4
@@ -1,4 +1,4 @@
-# stdint.m4 serial 50
+# stdint.m4 serial 51
 dnl Copyright (C) 2001-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -10,6 +10,7 @@ dnl Test whether <stdint.h> is supported or must be substituted.
 AC_DEFUN_ONCE([gl_STDINT_H],
 [
   AC_PREREQ([2.59])dnl
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
 
   AC_REQUIRE([gl_LIMITS_H])
   AC_REQUIRE([gt_TYPE_WINT_T])
@@ -288,8 +289,12 @@ static const char *macro_values[] =
 ]])],
               [gl_cv_header_working_stdint_h=yes],
               [],
-              [dnl When cross-compiling, assume it works.
-               gl_cv_header_working_stdint_h=yes
+              [case "$host_os" in
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
+                         # In general, assume it works.
+                 *)      gl_cv_header_working_stdint_h="guessing yes" ;;
+               esac
               ])
          ])
       ])
@@ -299,15 +304,16 @@ static const char *macro_values[] =
   HAVE_SYS_BITYPES_H=0
   HAVE_SYS_INTTYPES_H=0
   STDINT_H=stdint.h
-  if test "$gl_cv_header_working_stdint_h" = yes; then
-    HAVE_C99_STDINT_H=1
-    dnl Now see whether the system <stdint.h> works without
-    dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
-    AC_CACHE_CHECK([whether stdint.h predates C++11],
-      [gl_cv_header_stdint_predates_cxx11_h],
-      [gl_cv_header_stdint_predates_cxx11_h=yes
-       AC_COMPILE_IFELSE([
-         AC_LANG_PROGRAM([[
+  case "$gl_cv_header_working_stdint_h" in
+    *yes)
+      HAVE_C99_STDINT_H=1
+      dnl Now see whether the system <stdint.h> works without
+      dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
+      AC_CACHE_CHECK([whether stdint.h predates C++11],
+        [gl_cv_header_stdint_predates_cxx11_h],
+        [gl_cv_header_stdint_predates_cxx11_h=yes
+         AC_COMPILE_IFELSE([
+           AC_LANG_PROGRAM([[
 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
 #include <stdint.h>
 ]
@@ -315,45 +321,47 @@ gl_STDINT_INCLUDES
 [
 intmax_t im = INTMAX_MAX;
 int32_t i32 = INT32_C (0x7fffffff);
-         ]])],
-         [gl_cv_header_stdint_predates_cxx11_h=no])])
+           ]])],
+           [gl_cv_header_stdint_predates_cxx11_h=no])])
 
-    if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
-      AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
-                [Define to 1 if the system <stdint.h> predates C++11.])
-      AC_DEFINE([__STDC_LIMIT_MACROS], [1],
-                [Define to 1 if the system <stdint.h> predates C++11.])
-    fi
-    AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
-      [gl_cv_header_stdint_width],
-      [gl_cv_header_stdint_width=no
-       AC_COMPILE_IFELSE(
-         [AC_LANG_PROGRAM([[
-            /* Work if build is not clean.  */
-            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
-            #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
-             #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
-            #endif
-            #include <stdint.h>
-            ]gl_STDINT_INCLUDES[
-            int iw = UINTMAX_WIDTH;
-            ]])],
-         [gl_cv_header_stdint_width=yes])])
-    if test "$gl_cv_header_stdint_width" = yes; then
-      STDINT_H=
-    fi
-  else
-    dnl Check for <sys/inttypes.h>, and for
-    dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
-    AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
-    if test $ac_cv_header_sys_inttypes_h = yes; then
-      HAVE_SYS_INTTYPES_H=1
-    fi
-    if test $ac_cv_header_sys_bitypes_h = yes; then
-      HAVE_SYS_BITYPES_H=1
-    fi
-    gl_STDINT_TYPE_PROPERTIES
-  fi
+      if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
+        AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
+                  [Define to 1 if the system <stdint.h> predates C++11.])
+        AC_DEFINE([__STDC_LIMIT_MACROS], [1],
+                  [Define to 1 if the system <stdint.h> predates C++11.])
+      fi
+      AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
+        [gl_cv_header_stdint_width],
+        [gl_cv_header_stdint_width=no
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
+              /* Work if build is not clean.  */
+              #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
+              #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+               #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+              #endif
+              #include <stdint.h>
+              ]gl_STDINT_INCLUDES[
+              int iw = UINTMAX_WIDTH;
+              ]])],
+           [gl_cv_header_stdint_width=yes])])
+      if test "$gl_cv_header_stdint_width" = yes; then
+        STDINT_H=
+      fi
+      ;;
+    *)
+      dnl Check for <sys/inttypes.h>, and for
+      dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
+      AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
+      if test $ac_cv_header_sys_inttypes_h = yes; then
+        HAVE_SYS_INTTYPES_H=1
+      fi
+      if test $ac_cv_header_sys_bitypes_h = yes; then
+        HAVE_SYS_BITYPES_H=1
+      fi
+      gl_STDINT_TYPE_PROPERTIES
+      ;;
+  esac
 
   dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
   LIMITS_H=limits.h
diff --git a/m4/strerror.m4 b/m4/strerror.m4
index 460ddc9571..279efd60f6 100644
--- a/m4/strerror.m4
+++ b/m4/strerror.m4
@@ -1,4 +1,4 @@
-# strerror.m4 serial 17
+# strerror.m4 serial 18
 dnl Copyright (C) 2002, 2007-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -80,6 +80,8 @@ AC_DEFUN([gl_FUNC_STRERROR_0],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_strerror_0_works="guessing yes" ;;
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_func_strerror_0_works="guessing yes" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_strerror_0_works="guessing no" ;;
        esac
diff --git a/m4/strncat.m4 b/m4/strncat.m4
index 27d15ee0a9..e77ecb38b7 100644
--- a/m4/strncat.m4
+++ b/m4/strncat.m4
@@ -1,4 +1,4 @@
-# strncat.m4 serial 2
+# strncat.m4 serial 3
 dnl Copyright (C) 2002-2004, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -84,9 +84,11 @@ AC_DEFUN_ONCE([gl_FUNC_STRNCAT],
        [
         case "$host_os" in
                     # Guess no on Solaris.
-          solaris*) gl_cv_func_strncat_works="guessing no";;
+          solaris*) gl_cv_func_strncat_works="guessing no" ;;
+                    # Guess yes on native Windows.
+          mingw*)   gl_cv_func_strncat_works="guessing yes" ;;
                     # Guess yes otherwise.
-          *)        gl_cv_func_strncat_works="guessing yes";;
+          *)        gl_cv_func_strncat_works="guessing yes" ;;
         esac
        ])
     ])
diff --git a/m4/strtod.m4 b/m4/strtod.m4
index ca12cd5278..cad57993df 100644
--- a/m4/strtod.m4
+++ b/m4/strtod.m4
@@ -1,4 +1,4 @@
-# strtod.m4 serial 22
+# strtod.m4 serial 23
 dnl Copyright (C) 2002-2003, 2006-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_STRTOD],
 [
   AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   m4_ifdef([gl_FUNC_STRTOD_OBSOLETE], [
     dnl Test whether strtod is declared.
     dnl Don't call AC_FUNC_STRTOD, because it does not have the right guess
@@ -113,7 +114,14 @@ numeric_equal (double x, double y)
 #endif
            ],
            [gl_cv_func_strtod_works="guessing yes"],
-           [gl_cv_func_strtod_works="guessing no"])])])
+           [case "$host_os" in
+                      # Guess yes on native Windows.
+              mingw*) gl_cv_func_strtod_works="guessing yes" ;;
+              *)      gl_cv_func_strtod_works="guessing no" ;;
+            esac
+           ])
+        ])
+      ])
     case "$gl_cv_func_strtod_works" in
       *yes) ;;
       *)
diff --git a/m4/strtoimax.m4 b/m4/strtoimax.m4
index f0586f1a80..61809c8b5d 100644
--- a/m4/strtoimax.m4
+++ b/m4/strtoimax.m4
@@ -1,4 +1,4 @@
-# strtoimax.m4 serial 14
+# strtoimax.m4 serial 15
 dnl Copyright (C) 2002-2004, 2006, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -61,10 +61,12 @@ int main ()
          [gl_cv_func_strtoimax=yes],
          [gl_cv_func_strtoimax=no],
          [case "$host_os" in
-                   # Guess no on AIX 5.
-            aix5*) gl_cv_func_strtoimax="guessing no" ;;
-                   # Guess yes otherwise.
-            *)     gl_cv_func_strtoimax="guessing yes" ;;
+                    # Guess no on AIX 5.
+            aix5*)  gl_cv_func_strtoimax="guessing no" ;;
+                    # Guess yes on native Windows.
+            mingw*) gl_cv_func_strtoimax="guessing yes" ;;
+                    # Guess yes otherwise.
+            *)      gl_cv_func_strtoimax="guessing yes" ;;
           esac
          ])
       ])
diff --git a/m4/strtok_r.m4 b/m4/strtok_r.m4
index cb551cc61d..65c2148c45 100644
--- a/m4/strtok_r.m4
+++ b/m4/strtok_r.m4
@@ -1,4 +1,4 @@
-# strtok_r.m4 serial 13
+# strtok_r.m4 serial 14
 dnl Copyright (C) 2002-2004, 2006-2007, 2009-2017 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -41,14 +41,13 @@ AC_DEFUN([gl_FUNC_STRTOK_R],
          ],
          [gl_cv_func_strtok_r_works=yes],
          [gl_cv_func_strtok_r_works=no],
-         [
-changequote(,)dnl
-          case "$host_os" in
+         [case "$host_os" in
                     # Guess no on glibc systems.
-            *-gnu*) gl_cv_func_strtok_r_works="guessing no";;
-            *)      gl_cv_func_strtok_r_works="guessing yes";;
+            *-gnu*) gl_cv_func_strtok_r_works="guessing no" ;;
+                    # Guess yes on native Windows.
+            mingw*) gl_cv_func_strtok_r_works="guessing yes" ;;
+            *)      gl_cv_func_strtok_r_works="guessing yes" ;;
           esac
-changequote([,])dnl
          ])
       ])
     case "$gl_cv_func_strtok_r_works" in
diff --git a/m4/trunc.m4 b/m4/trunc.m4
index a070d78285..f13bb3c7ec 100644
--- a/m4/trunc.m4
+++ b/m4/trunc.m4
@@ -1,4 +1,4 @@
-# trunc.m4 serial 9
+# trunc.m4 serial 10
 dnl Copyright (C) 2007, 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -72,6 +72,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_trunc_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_trunc_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_trunc_ieee="guessing no" ;;
                esac
diff --git a/m4/truncf.m4 b/m4/truncf.m4
index 83eaf0be3c..fd29ea389b 100644
--- a/m4/truncf.m4
+++ b/m4/truncf.m4
@@ -1,4 +1,4 @@
-# truncf.m4 serial 9
+# truncf.m4 serial 10
 dnl Copyright (C) 2007, 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -72,6 +72,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_truncf_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_truncf_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_truncf_ieee="guessing no" ;;
                esac
diff --git a/m4/truncl.m4 b/m4/truncl.m4
index 37d2b717c5..5fd0411c18 100644
--- a/m4/truncl.m4
+++ b/m4/truncl.m4
@@ -1,4 +1,4 @@
-# truncl.m4 serial 11
+# truncl.m4 serial 12
 dnl Copyright (C) 2007-2008, 2010-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -62,8 +62,10 @@ int main()
           [gl_cv_func_truncl_works=yes],
           [gl_cv_func_truncl_works=no],
           [case "$host_os" in
-             osf4*) gl_cv_func_truncl_works="guessing no";;
-             *)     gl_cv_func_truncl_works="guessing yes";;
+             osf4*)  gl_cv_func_truncl_works="guessing no" ;;
+                     # Guess yes on native Windows.
+             mingw*) gl_cv_func_truncl_works="guessing yes" ;;
+             *)      gl_cv_func_truncl_works="guessing yes" ;;
            esac
           ])
       ])
@@ -103,6 +105,8 @@ int main (int argc, char *argv[])
               [case "$host_os" in
                          # Guess yes on glibc systems.
                  *-gnu*) gl_cv_func_truncl_ieee="guessing yes" ;;
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_func_truncl_ieee="guessing yes" ;;
                          # If we don't know, assume the worst.
                  *)      gl_cv_func_truncl_ieee="guessing no" ;;
                esac
diff --git a/m4/tsearch.m4 b/m4/tsearch.m4
index 24b35ce2d0..8e45124c75 100644
--- a/m4/tsearch.m4
+++ b/m4/tsearch.m4
@@ -1,4 +1,4 @@
-# tsearch.m4 serial 6
+# tsearch.m4 serial 7
 dnl Copyright (C) 2006-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -38,8 +38,10 @@ main ()
   return result;
 }]])], [gl_cv_func_tdelete_works=yes], [gl_cv_func_tdelete_works=no],
             [case "$host_os" in
-               openbsd*) gl_cv_func_tdelete_works="guessing no";;
-               *)        gl_cv_func_tdelete_works="guessing yes";;
+               openbsd*) gl_cv_func_tdelete_works="guessing no" ;;
+                         # Guess yes on native Windows.
+               mingw*)   gl_cv_func_tdelete_works="guessing yes" ;;
+               *)        gl_cv_func_tdelete_works="guessing yes" ;;
              esac
             ])
       ])
diff --git a/m4/tzset.m4 b/m4/tzset.m4
index f8f7736548..11ceeabed6 100644
--- a/m4/tzset.m4
+++ b/m4/tzset.m4
@@ -1,4 +1,4 @@
-# serial 9
+# serial 10
 
 # Copyright (C) 2003, 2007, 2009-2017 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -70,6 +70,8 @@ main ()
        [case "$host_os" in
                   # Guess all is fine on glibc systems.
           *-gnu*) gl_cv_func_tzset_clobber="guessing no" ;;
+                  # Guess no on native Windows.
+          mingw*) gl_cv_func_tzset_clobber="guessing no" ;;
                   # If we don't know, assume the worst.
           *)      gl_cv_func_tzset_clobber="guessing yes" ;;
         esac
diff --git a/m4/ungetc.m4 b/m4/ungetc.m4
index 72e833490f..9f41c0e1b6 100644
--- a/m4/ungetc.m4
+++ b/m4/ungetc.m4
@@ -1,4 +1,4 @@
-# ungetc.m4 serial 4
+# ungetc.m4 serial 5
 dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -42,8 +42,10 @@ AC_DEFUN_ONCE([gl_FUNC_UNGETC_WORKS],
         [gl_cv_func_ungetc_works=yes], [gl_cv_func_ungetc_works=no],
         [case "$host_os" in
                    # Guess yes on glibc and bionic systems.
-           *-gnu*|*-android*)
+           *-gnu* | *-android*)
                    gl_cv_func_ungetc_works="guessing yes" ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_ungetc_works="guessing yes" ;;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_ungetc_works="guessing no" ;;
          esac
diff --git a/m4/unlink-busy.m4 b/m4/unlink-busy.m4
index 331ac7a61c..9f51353bca 100644
--- a/m4/unlink-busy.m4
+++ b/m4/unlink-busy.m4
@@ -1,4 +1,4 @@
-#serial 13
+#serial 14
 
 dnl From J. David Anglin.
 
@@ -29,12 +29,17 @@ AC_DEFUN([gl_FUNC_UNLINK_BUSY_TEXT],
             }]])],
         [gl_cv_func_unlink_busy_text=yes],
         [gl_cv_func_unlink_busy_text=no],
-        [gl_cv_func_unlink_busy_text=no]
+        [case "$host_os" in
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_unlink_busy_text="guessing no" ;;
+           *)      gl_cv_func_unlink_busy_text="guessing no" ;;
+         esac
+        ]
       )
     ]
   )
 
-  if test $gl_cv_func_unlink_busy_text = no; then
-    INSTALL=$ac_install_sh
-  fi
+  case "$gl_cv_func_unlink_busy_text" in
+    *no) INSTALL=$ac_install_sh ;;
+  esac
 ])
diff --git a/m4/unlink.m4 b/m4/unlink.m4
index dee6c35695..ac86e7fe31 100644
--- a/m4/unlink.m4
+++ b/m4/unlink.m4
@@ -1,4 +1,4 @@
-# unlink.m4 serial 11
+# unlink.m4 serial 12
 dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -45,6 +45,8 @@ AC_DEFUN([gl_FUNC_UNLINK],
       [case "$host_os" in
                  # Guess yes on glibc systems.
          *-gnu*) gl_cv_func_unlink_honors_slashes="guessing yes" ;;
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_unlink_honors_slashes="guessing no" ;;
                  # If we don't know, assume the worst.
          *)      gl_cv_func_unlink_honors_slashes="guessing no" ;;
        esac
diff --git a/m4/usleep.m4 b/m4/usleep.m4
index caa580adf9..e69ed85b24 100644
--- a/m4/usleep.m4
+++ b/m4/usleep.m4
@@ -1,4 +1,4 @@
-# usleep.m4 serial 3
+# usleep.m4 serial 4
 dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -31,6 +31,8 @@ AC_DEFUN([gl_FUNC_USLEEP],
         [case "$host_os" in
                    # Guess yes on glibc systems.
            *-gnu*) gl_cv_func_usleep_works="guessing yes" ;;
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_usleep_works="guessing no" ;;
                    # If we don't know, assume the worst.
            *)      gl_cv_func_usleep_works="guessing no" ;;
          esac
diff --git a/m4/utimes.m4 b/m4/utimes.m4
index 518824f218..847b2eba78 100644
--- a/m4/utimes.m4
+++ b/m4/utimes.m4
@@ -1,5 +1,5 @@
 # Detect some bugs in glibc's implementation of utimes.
-# serial 4
+# serial 5
 
 dnl Copyright (C) 2003-2005, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
@@ -20,10 +20,10 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_FUNC_UTIMES],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether the utimes function works],
                  [gl_cv_func_working_utimes],
-  [
-  AC_RUN_IFELSE([AC_LANG_SOURCE([[
+    [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -142,9 +142,17 @@ main ()
   ]])],
        [gl_cv_func_working_utimes=yes],
        [gl_cv_func_working_utimes=no],
-       [gl_cv_func_working_utimes=no])])
+       [case "$host_os" in
+                  # Guess no on native Windows.
+          mingw*) gl_cv_func_working_utimes="guessing no" ;;
+          *)      gl_cv_func_working_utimes="guessing no" ;;
+        esac
+       ])
+    ])
 
-  if test $gl_cv_func_working_utimes = yes; then
-    AC_DEFINE([HAVE_WORKING_UTIMES], [1], [Define if utimes works properly.])
-  fi
+  case "$gl_cv_func_working_utimes" in
+    *yes)
+      AC_DEFINE([HAVE_WORKING_UTIMES], [1], [Define if utimes works properly.])
+      ;;
+  esac
 ])
diff --git a/m4/wcrtomb.m4 b/m4/wcrtomb.m4
index 0aa040df3d..fcc3f8c82a 100644
--- a/m4/wcrtomb.m4
+++ b/m4/wcrtomb.m4
@@ -1,4 +1,4 @@
-# wcrtomb.m4 serial 11
+# wcrtomb.m4 serial 12
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -51,6 +51,8 @@ changequote(,)dnl
           case "$host_os" in
                                      # Guess no on AIX 4, OSF/1 and Solaris.
             aix4* | osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;
+                                     # Guess yes on native Windows.
+            mingw*)                  gl_cv_func_wcrtomb_retval="guessing yes" ;;
                                      # Guess yes otherwise.
             *)                       gl_cv_func_wcrtomb_retval="guessing yes" ;;
           esac
diff --git a/m4/wcsrtombs.m4 b/m4/wcsrtombs.m4
index 2c3bf8dbf2..51a2e5cb05 100644
--- a/m4/wcsrtombs.m4
+++ b/m4/wcsrtombs.m4
@@ -1,4 +1,4 @@
-# wcsrtombs.m4 serial 11
+# wcsrtombs.m4 serial 12
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -71,10 +71,12 @@ AC_DEFUN([gl_WCSRTOMBS_TERMINATION],
       dnl is present.
 changequote(,)dnl
       case "$host_os" in
-              # Guess no on OSF/1.
-        osf*) gl_cv_func_wcsrtombs_termination="guessing no" ;;
-              # Guess yes otherwise.
-        *)    gl_cv_func_wcsrtombs_termination="guessing yes" ;;
+                # Guess no on OSF/1.
+        osf*)   gl_cv_func_wcsrtombs_termination="guessing no" ;;
+                # Guess yes on native Windows.
+        mingw*) gl_cv_func_wcsrtombs_termination="guessing yes" ;;
+                # Guess yes otherwise.
+        *)      gl_cv_func_wcsrtombs_termination="guessing yes" ;;
       esac
 changequote([,])dnl
       if test $LOCALE_FR != none; then
@@ -135,6 +137,8 @@ changequote(,)dnl
       case "$host_os" in
                                # Guess no on HP-UX, OSF/1, mingw.
         hpux* | osf* | mingw*) gl_cv_func_wcsrtombs_null="guessing no" ;;
+                               # Guess yes on native Windows.
+        mingw*)                gl_cv_func_wcsrtombs_null="guessing yes" ;;
                                # Guess yes otherwise.
         *)                     gl_cv_func_wcsrtombs_null="guessing yes" ;;
       esac
diff --git a/m4/wctob.m4 b/m4/wctob.m4
index 492f4c8d71..9de4960149 100644
--- a/m4/wctob.m4
+++ b/m4/wctob.m4
@@ -1,4 +1,4 @@
-# wctob.m4 serial 10
+# wctob.m4 serial 11
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -31,6 +31,9 @@ changequote(,)dnl
             # Guess no on Solaris <= 9 and Cygwin.
           solaris2.[1-9] | solaris2.[1-9].* | cygwin*)
             gl_cv_func_wctob_works="guessing no" ;;
+            # Guess no on native Windows.
+          mingw*)
+            gl_cv_func_wctob_works="guessing no" ;;
             # Guess yes otherwise.
           *) gl_cv_func_wctob_works="guessing yes" ;;
         esac
author	Bruno Haible <bruno@clisp.org>	2017-07-13 21:06:02 +0200
committer	Bruno Haible <bruno@clisp.org>	2017-07-13 21:07:22 +0200
commit	a9b04535c13761e33803afab625af008d33d05e3 (patch)
tree	3c182a785c3a1e75ce922d50205c4453a090a09e /m4
parent	abc08a2630c2e89c52ef876ef650e69d7d6a2215 (diff)
download	gnulib-a9b04535c13761e33803afab625af008d33d05e3.tar.gz