Update gnulib files.

9 files changed, 109 insertions, 40 deletions

diff --git a/gl/m4/getcwd.m4 b/gl/m4/getcwd.m4
index 269fdd7c65..d3bbe597b3 100644
--- a/gl/m4/getcwd.m4
+++ b/gl/m4/getcwd.m4
@@ -6,7 +6,7 @@
 # with or without modifications, as long as this notice is preserved.
 
 # Written by Paul Eggert.
-# serial 7
+# serial 8
 
 AC_DEFUN([gl_FUNC_GETCWD_NULL],
   [
@@ -37,9 +37,6 @@ AC_DEFUN([gl_FUNC_GETCWD_NULL],
                return 0;
              }
 #endif
-         /* If size is non-zero, allocation must fail if size is too small */
-         if (getcwd (NULL, 1))
-           return 5;
          ]])],
         [gl_cv_func_getcwd_null=yes],
         [gl_cv_func_getcwd_null=no],
@@ -55,6 +52,24 @@ AC_DEFUN([gl_FUNC_GETCWD_NULL],
         ]])])
 ])
 
+AC_DEFUN([gl_FUNC_GETCWD_SIGNATURE],
+[
+  AC_CACHE_CHECK([for getcwd with POSIX signature],
+    [gl_cv_func_getcwd_posix_signature],
+    [AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[#include <unistd.h>]],
+         [[extern
+           #ifdef __cplusplus
+           "C"
+           #endif
+           char *getcwd (char *, size_t);
+         ]])
+      ],
+      [gl_cv_func_getcwd_posix_signature=yes],
+      [gl_cv_func_getcwd_posix_signature=no])
+   ])
+])
 
 dnl Guarantee that getcwd will malloc with a NULL first argument.  Assumes
 dnl that either the system getcwd is robust, or that calling code is okay
@@ -67,9 +82,10 @@ AC_DEFUN([gl_FUNC_GETCWD_LGPL],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+  AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE])
 
-  case $gl_cv_func_getcwd_null in
-  *yes) ;;
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature in
+  *yes,yes) ;;
   *)
     dnl Minimal replacement lib/getcwd-lgpl.c.
     REPLACE_GETCWD=1
@@ -83,6 +99,7 @@ AC_DEFUN([gl_FUNC_GETCWD],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+  AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
 
   gl_abort_bug=no
@@ -94,8 +111,8 @@ AC_DEFUN([gl_FUNC_GETCWD],
     gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);;
   esac
 
-  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in
-  *yes,yes,no) ;;
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature$gl_cv_func_getcwd_path_max,$gl_abort_bug in
+  *yes,yes,yes,no) ;;
   *)
     dnl Full replacement lib/getcwd.c, overrides LGPL replacement.
     REPLACE_GETCWD=1;;
diff --git a/gl/m4/gnulib-common.m4 b/gl/m4/gnulib-common.m4
index 9dc8fbe8e4..8fc448fdc8 100644
--- a/gl/m4/gnulib-common.m4
+++ b/gl/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 29
+# gnulib-common.m4 serial 30
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -213,6 +213,8 @@ m4_ifndef([AS_VAR_IF],
 
 # gl_PROG_AR_RANLIB
 # Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
+# The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
+# the values.
 AC_DEFUN([gl_PROG_AR_RANLIB],
 [
   dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
@@ -220,24 +222,47 @@ AC_DEFUN([gl_PROG_AR_RANLIB],
   dnl library formats. In particular, the GNU binutils programs ar, ranlib
   dnl produce libraries that work only with gcc, not with cc.
   AC_REQUIRE([AC_PROG_CC])
-  AC_EGREP_CPP([Amsterdam],
+  AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
     [
+      AC_EGREP_CPP([Amsterdam],
+        [
 #ifdef __ACK__
 Amsterdam
 #endif
-    ],
-    [AR='cc -c.a'
-     ARFLAGS='-o'
-     RANLIB=':'
-    ],
-    [dnl Use the Automake-documented default values for AR and ARFLAGS.
-     AR='ar'
-     ARFLAGS='cru'
-     dnl Use the ranlib program if it is available.
-     AC_PROG_RANLIB
+        ],
+        [gl_cv_c_amsterdam_compiler=yes],
+        [gl_cv_c_amsterdam_compiler=no])
     ])
+  if test -z "$AR"; then
+    if test $gl_cv_c_amsterdam_compiler = yes; then
+      AR='cc -c.a'
+      if test -z "$ARFLAGS"; then
+        ARFLAGS='-o'
+      fi
+    else
+      dnl Use the Automake-documented default values for AR and ARFLAGS,
+      dnl but prefer ${host}-ar over ar (useful for cross-compiling).
+      AC_CHECK_TOOL([AR], [ar], [ar])
+      if test -z "$ARFLAGS"; then
+        ARFLAGS='cru'
+      fi
+    fi
+  else
+    if test -z "$ARFLAGS"; then
+      ARFLAGS='cru'
+    fi
+  fi
   AC_SUBST([AR])
   AC_SUBST([ARFLAGS])
+  if test -z "$RANLIB"; then
+    if test $gl_cv_c_amsterdam_compiler = yes; then
+      RANLIB=':'
+    else
+      dnl Use the ranlib program if it is available.
+      AC_PROG_RANLIB
+    fi
+  fi
+  AC_SUBST([RANLIB])
 ])
 
 # AC_PROG_MKDIR_P
diff --git a/gl/m4/largefile.m4 b/gl/m4/largefile.m4
index 6986244b39..d83fea1233 100644
--- a/gl/m4/largefile.m4
+++ b/gl/m4/largefile.m4
@@ -19,8 +19,8 @@ m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES],
     incorrectly reject 9223372036854775807.  */
 @%:@define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
-		      ? 1 : -1]];[]dnl
+                       && LARGE_OFF_T % 2147483647 == 1)
+                      ? 1 : -1]];[]dnl
 ])
 
 
@@ -58,7 +58,7 @@ rm -rf conftest*[]dnl
 # http://www.unix-systems.org/version2/whatsnew/lfs20mar.html
 AC_DEFUN([AC_SYS_LARGEFILE],
 [AC_ARG_ENABLE(largefile,
-	       [  --disable-largefile     omit support for large files])
+               [  --disable-largefile     omit support for large files])
 if test "$enable_largefile" != no; then
 
   AC_CACHE_CHECK([for special C compiler options needed for large files],
@@ -67,13 +67,13 @@ if test "$enable_largefile" != no; then
      if test "$GCC" != yes; then
        ac_save_CC=$CC
        while :; do
-	 # IRIX 6.2 and later do not support large files by default,
-	 # so use the C compiler's -n32 option if that helps.
-	 AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])])
-	 AC_COMPILE_IFELSE([], [break])
-	 CC="$CC -n32"
-	 AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break])
-	 break
+         # IRIX 6.2 and later do not support large files by default,
+         # so use the C compiler's -n32 option if that helps.
+         AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])])
+         AC_COMPILE_IFELSE([], [break])
+         CC="$CC -n32"
+         AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break])
+         break
        done
        CC=$ac_save_CC
        rm -f conftest.$ac_ext
diff --git a/gl/tests/init.sh b/gl/tests/init.sh
index 0da6c1e328..e6f5f1c42c 100644
--- a/gl/tests/init.sh
+++ b/gl/tests/init.sh
@@ -208,8 +208,10 @@ export MALLOC_PERTURB_
 # a partition, or to undo any other global state changes.
 cleanup_ () { :; }
 
-if ( diff --version < /dev/null 2>&1 | grep GNU ) > /dev/null 2>&1; then
+if ( diff -u "$0" "$0" < /dev/null ) > /dev/null 2>&1; then
   compare () { diff -u "$@"; }
+elif ( diff -c "$0" "$0" < /dev/null ) > /dev/null 2>&1; then
+  compare () { diff -c "$@"; }
 elif ( cmp --version < /dev/null 2>&1 | grep GNU ) > /dev/null 2>&1; then
   compare () { cmp -s "$@"; }
 else
diff --git a/gl/tests/lstat.c b/gl/tests/lstat.c
index b26065ede2..d786288f2b 100644
--- a/gl/tests/lstat.c
+++ b/gl/tests/lstat.c
@@ -17,6 +17,10 @@
 
 /* written by Jim Meyering */
 
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_lstat doesn't recurse to
+   rpl_lstat.  */
+#define __need_system_sys_stat_h
 #include <config.h>
 
 #if !HAVE_LSTAT
@@ -27,7 +31,6 @@ typedef int dummy;
 #else /* HAVE_LSTAT */
 
 /* Get the original definition of lstat.  It might be defined as a macro.  */
-# define __need_system_sys_stat_h
 # include <sys/types.h>
 # include <sys/stat.h>
 # undef __need_system_sys_stat_h
@@ -39,7 +42,10 @@ orig_lstat (const char *filename, struct stat *buf)
 }
 
 /* Specification.  */
-# include <sys/stat.h>
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+# include "sys/stat.h"
 
 # include <string.h>
 # include <errno.h>
diff --git a/gl/tests/open.c b/gl/tests/open.c
index e60b619949..8dc36ef1e4 100644
--- a/gl/tests/open.c
+++ b/gl/tests/open.c
@@ -16,13 +16,16 @@
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
+/* If the user's config.h happens to include <fcntl.h>, let it include only
+   the system's <fcntl.h> here, so that orig_open doesn't recurse to
+   rpl_open.  */
+#define __need_system_fcntl_h
 #include <config.h>
 
 /* Get the original definition of open.  It might be defined as a macro.  */
-#define __need_system_fcntl_h
 #include <fcntl.h>
-#undef __need_system_fcntl_h
 #include <sys/types.h>
+#undef __need_system_fcntl_h
 
 static inline int
 orig_open (const char *filename, int flags, mode_t mode)
@@ -31,7 +34,9 @@ orig_open (const char *filename, int flags, mode_t mode)
 }
 
 /* Specification.  */
-#include <fcntl.h>
+/* Write "fcntl.h" here, not <fcntl.h>, otherwise OSF/1 5.1 DTK cc eliminates
+   this include because of the preliminary #include <fcntl.h> above.  */
+#include "fcntl.h"
 
 #include <errno.h>
 #include <stdarg.h>
diff --git a/gl/tests/stat.c b/gl/tests/stat.c
index f07370dd06..1002f161bf 100644
--- a/gl/tests/stat.c
+++ b/gl/tests/stat.c
@@ -16,10 +16,13 @@
 
 /* written by Eric Blake */
 
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_stat doesn't recurse to
+   rpl_stat.  */
+#define __need_system_sys_stat_h
 #include <config.h>
 
 /* Get the original definition of stat.  It might be defined as a macro.  */
-#define __need_system_sys_stat_h
 #include <sys/types.h>
 #include <sys/stat.h>
 #undef __need_system_sys_stat_h
@@ -31,7 +34,10 @@ orig_stat (const char *filename, struct stat *buf)
 }
 
 /* Specification.  */
-#include <sys/stat.h>
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+#include "sys/stat.h"
 
 #include <errno.h>
 #include <limits.h>
diff --git a/gl/tests/test-float.c b/gl/tests/test-float.c
index 530181306f..57a472faea 100644
--- a/gl/tests/test-float.c
+++ b/gl/tests/test-float.c
@@ -298,7 +298,14 @@ test_long_double (void)
 
   /* Check that 'long double' is at least as wide as 'double'.  */
   ASSERT (LDBL_MANT_DIG >= DBL_MANT_DIG);
-  ASSERT (LDBL_MIN_EXP <= DBL_MIN_EXP);
+
+  /* Normally, we would also assert this:
+       ASSERT (LDBL_MIN_EXP <= DBL_MIN_EXP);
+     but at least on powerpc64 with gcc-4.4.4, it would fail:
+     $ :|gcc -dD -E -include stddef.h -|grep -E 'L?DBL_MIN_EXP'
+     #define __DBL_MIN_EXP__ (-1021)
+     #define __LDBL_MIN_EXP__ (-968)
+  */
   ASSERT (LDBL_MAX_EXP >= DBL_MAX_EXP);
 
   /* Check the value of LDBL_DIG.  */
diff --git a/gl/unistd.in.h b/gl/unistd.in.h
index 769ecf0d43..119cd142f4 100644
--- a/gl/unistd.in.h
+++ b/gl/unistd.in.h
@@ -85,7 +85,8 @@
 /* mingw declares getcwd in <io.h>, not in <unistd.h>.  */
 #if ((@GNULIB_GETCWD@ || defined GNULIB_POSIXCHECK) \
      && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
-# include <io.h>
+# include <io.h>     /* mingw32, mingw64 */
+# include <direct.h> /* mingw64 */
 #endif
 
 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.