Avoid "guessing no" guesses when cross-compiling to glibc systems.

* m4/cbrtl.m4 (gl_FUNC_CBRTL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_cbrtl_ieee to "guessing yes".
* m4/ceil.m4 (gl_FUNC_CEIL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_ceil_ieee to "guessing yes".
* m4/ceilf.m4 (gl_FUNC_CEILF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_ceilf_ieee to "guessing yes".
* m4/ceill.m4 (gl_FUNC_CEILL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_ceill_ieee to "guessing yes".
* m4/chown.m4 (gl_FUNC_CHOWN): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_chown_slash_works,
gl_cv_func_chown_ctime_works to "guessing yes".
* m4/lchown.m4 (gl_FUNC_LCHOWN): Update.
* m4/exp2l.m4 (gl_FUNC_EXP2L): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_exp2l_ieee to "guessing yes".
* m4/expm1.m4 (gl_FUNC_EXPM1): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_expm1_ieee to "guessing yes".
* m4/fchdir.m4 (gl_FUNC_FCHDIR): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_open_directory_works to
"guessing yes".
* m4/fstat.m4 (gl_FUNC_FSTAT): Update.
* m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_fdopendir_works to
"guessing yes".
* m4/floor.m4 (gl_FUNC_FLOOR): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_floor_ieee to "guessing yes".
* m4/floorf.m4 (gl_FUNC_FLOORF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_floorf_ieee to
"guessing yes".
* m4/fmod.m4 (gl_FUNC_FMOD): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_fmod_ieee to "guessing yes".
* m4/fmodf.m4 (gl_FUNC_FMODF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_fmodf_ieee to "guessing yes".
* m4/fmodl.m4 (gl_FUNC_FMODL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_fmodl_ieee to "guessing yes".
* m4/getgroups.m4 (gl_FUNC_GETGROUPS): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_getgroups_works to
"guessing yes".
* m4/hypot.m4 (gl_FUNC_HYPOT): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_hypot_ieee to "guessing yes".
* m4/hypotf.m4 (gl_FUNC_HYPOTF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_hypotf_ieee to
"guessing yes".
* m4/hypotl.m4 (gl_FUNC_HYPOTL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_hypotl_ieee to
"guessing yes".
* m4/link.m4 (gl_FUNC_LINK): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_link_works to "guessing yes".
* m4/log.m4 (gl_FUNC_LOG): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log_ieee to "guessing yes".
* m4/logf.m4 (gl_FUNC_LOGF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_logf_ieee to "guessing yes".
* m4/log10.m4 (gl_FUNC_LOG10): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log10_ieee to "guessing yes".
* m4/log10f.m4 (gl_FUNC_LOG10F): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log10f_ieee to
"guessing yes".
* m4/log1p.m4 (gl_FUNC_LOG1P): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log1p_ieee to "guessing yes".
* m4/log1pf.m4 (gl_FUNC_LOG1PF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log1pf_ieee to
"guessing yes".
* m4/log1pl.m4 (gl_FUNC_LOG1PL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log1pl_ieee to
"guessing yes".
* m4/log2.m4 (gl_FUNC_LOG2): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log2_ieee to "guessing yes".
* m4/log2f.m4 (gl_FUNC_LOG2F): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_log2f_ieee to "guessing yes".
* m4/mkdir.m4 (gl_FUNC_MKDIR): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_mkdir_trailing_slash_works,
gl_cv_func_mkdir_trailing_dot_works to "guessing yes".
* m4/mkfifo.m4 (gl_FUNC_MKFIFO): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_mkfifo_works to
"guessing yes".
* m4/mknod.m4 (gl_FUNC_MKNOD): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_mknod_works to
"guessing yes".
* m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_working_mkstemp to
"guessing yes".
* m4/modf.m4 (gl_FUNC_MODF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_modf_ieee to "guessing yes".
* m4/modff.m4 (gl_FUNC_MODFF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_modff_ieee to "guessing yes".
* m4/modfl.m4 (gl_FUNC_MODFL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_modfl_ieee to "guessing yes".
* m4/putenv.m4 (gl_FUNC_PUTENV): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_svid_putenv to
"guessing yes".
* m4/readlink.m4 (gl_FUNC_READLINK): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_readlink_works to
"guessing yes".
* m4/remainder.m4 (gl_FUNC_REMAINDER): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_remainder_ieee to
"guessing yes".
* m4/remainderf.m4 (gl_FUNC_REMAINDERF): Require AC_CANONICAL_HOST.
When cross-compiling to glibc systems, set gl_cv_func_remainderf_ieee
to "guessing yes".
* m4/remainderl.m4 (gl_FUNC_REMAINDERL): Require AC_CANONICAL_HOST.
When cross-compiling to glibc systems, set gl_cv_func_remainderl_ieee
to "guessing yes".
* m4/rmdir.m4 (gl_FUNC_RMDIR): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_rmdir_works to
"guessing yes".
* m4/unlink.m4 (gl_FUNC_UNLINK): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_unlink_honors_slashes,
gl_cv_func_unlink_parent_fails to "guessing yes".
* m4/remove.m4 (gl_FUNC_REMOVE): Update.
* m4/rename.m4 (gl_FUNC_RENAME): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_rename_slash_dst_works,
gl_cv_func_rename_slash_src_works, gl_cv_func_rename_link_works,
gl_cv_func_rename_dest_works to "guessing yes".
* m4/round.m4 (gl_FUNC_ROUND): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_round_ieee to "guessing yes".
* m4/roundf.m4 (gl_FUNC_ROUNDF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_roundf_ieee to
"guessing yes".
* m4/roundl.m4 (gl_FUNC_ROUNDL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_roundl_ieee to
"guessing yes".
* m4/setenv.m4 (gl_FUNC_SETENV): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_setenv_works to
"guessing yes".
(gl_FUNC_UNSETENV): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_unsetenv_works to
"guessing yes".
* m4/sleep.m4 (gl_FUNC_SLEEP): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_sleep_works to
"guessing yes".
* m4/stat.m4 (gl_FUNC_STAT): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_stat_file_slash to
"guessing yes".
* m4/symlink.m4 (gl_FUNC_SYMLINK): Require AC_CANONICAL_HOST. When
cross-compiling to glibc systems, set gl_cv_func_symlink_works to
"guessing yes".
* m4/trunc.m4 (gl_FUNC_TRUNC): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_trunc_ieee to "guessing yes".
* m4/truncf.m4 (gl_FUNC_TRUNCF): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_truncf_ieee to
"guessing yes".
* m4/truncl.m4 (gl_FUNC_TRUNCL): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_truncl_ieee to
"guessing yes".
* m4/usleep.m4 (gl_FUNC_USLEEP): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_usleep_works to
"guessing yes".
* m4/utimens.m4 (gl_UTIMENS): Require AC_CANONICAL_HOST. When cross-
compiling to glibc systems, set gl_cv_func_futimesat_works to
"guessing yes".

1 files changed, 32 insertions, 13 deletions

diff --git a/m4/chown.m4 b/m4/chown.m4
index 5f20e1b1cf..bb7b29598e 100644
--- a/m4/chown.m4
+++ b/m4/chown.m4
@@ -1,4 +1,4 @@
-# serial 25
+# serial 26
 # Determine whether we need the chown wrapper.
 
 dnl Copyright (C) 1997-2001, 2003-2005, 2007, 2009-2012 Free Software
@@ -20,6 +20,7 @@ AC_DEFUN_ONCE([gl_FUNC_CHOWN],
   AC_REQUIRE([AC_TYPE_UID_T])
   AC_REQUIRE([AC_FUNC_CHOWN])
   AC_REQUIRE([gl_FUNC_CHOWN_FOLLOWS_SYMLINK])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_FUNCS_ONCE([chown fchown])
 
   dnl mingw lacks chown altogether.
@@ -53,13 +54,22 @@ AC_DEFUN_ONCE([gl_FUNC_CHOWN],
         ]])],
         [gl_cv_func_chown_slash_works=yes],
         [gl_cv_func_chown_slash_works=no],
-        [gl_cv_func_chown_slash_works="guessing no"])
+        [case "$host_os" in
+                   # Guess yes on glibc systems.
+           *-gnu*) gl_cv_func_chown_slash_works="guessing yes" ;;
+                   # If we don't know, assume the worst.
+           *)      gl_cv_func_chown_slash_works="guessing no" ;;
+         esac
+        ])
       rm -f conftest.link conftest.file])
-    if test "$gl_cv_func_chown_slash_works" != yes; then
-      AC_DEFINE([CHOWN_TRAILING_SLASH_BUG], [1],
-        [Define to 1 if chown mishandles trailing slash.])
-      REPLACE_CHOWN=1
-    fi
+    case "$gl_cv_func_chown_slash_works" in
+      *yes) ;;
+      *)
+        AC_DEFINE([CHOWN_TRAILING_SLASH_BUG], [1],
+          [Define to 1 if chown mishandles trailing slash.])
+        REPLACE_CHOWN=1
+        ;;
+    esac
 
     dnl OpenBSD fails to update ctime if ownership does not change.
     AC_CACHE_CHECK([whether chown always updates ctime],
@@ -80,13 +90,22 @@ AC_DEFUN_ONCE([gl_FUNC_CHOWN],
         ]])],
         [gl_cv_func_chown_ctime_works=yes],
         [gl_cv_func_chown_ctime_works=no],
-        [gl_cv_func_chown_ctime_works="guessing no"])
+        [case "$host_os" in
+                   # Guess yes on glibc systems.
+           *-gnu*) gl_cv_func_chown_ctime_works="guessing yes" ;;
+                   # If we don't know, assume the worst.
+           *)      gl_cv_func_chown_ctime_works="guessing no" ;;
+         esac
+        ])
       rm -f conftest.file])
-    if test "$gl_cv_func_chown_ctime_works" != yes; then
-      AC_DEFINE([CHOWN_CHANGE_TIME_BUG], [1], [Define to 1 if chown fails
-        to change ctime when at least one argument was not -1.])
-      REPLACE_CHOWN=1
-    fi
+    case "$gl_cv_func_chown_ctime_works" in
+      *yes) ;;
+      *)
+        AC_DEFINE([CHOWN_CHANGE_TIME_BUG], [1], [Define to 1 if chown fails
+          to change ctime when at least one argument was not -1.])
+        REPLACE_CHOWN=1
+        ;;
+    esac
   fi
 ])