X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstat.m4;h=a8b79f5bcbaad568ac3e245fc0f10a8426fcbe9c;hb=9f1f81e4362dd265a2fa54b30b16ceed123cd4e5;hp=d87064518b268d4e544543f33629f6604d373451;hpb=44d7c1c1f004fa9bfb8ec3948de2671a7958cf5b;p=gnulib.git

diff --git a/m4/stat.m4 b/m4/stat.m4
index d87064518..a8b79f5bc 100644
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,32 +1,75 @@
-#serial 11
+# serial 10
 
-# Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004 Free Software
-# Foundation, Inc.
+# Copyright (C) 2009-2012 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-dnl From Jim Meyering.
-dnl Determine whether stat has the bug that it succeeds when given the
-dnl zero-length file name argument.  The stat from SunOS 4.1.4 and the Hurd
-dnl (as of 1998-11-01) do this.
-dnl
-dnl If it does, then define HAVE_STAT_EMPTY_STRING_BUG and arrange to
-dnl compile the wrapper function.
-dnl
-
 AC_DEFUN([gl_FUNC_STAT],
 [
-  AC_FUNC_STAT
-  dnl Note: AC_FUNC_STAT does AC_LIBOBJ(stat).
-  if test $ac_cv_func_stat_empty_string_bug = yes; then
-    gl_PREREQ_STAT
-  fi
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([lstat])
+  dnl mingw is the only known platform where stat(".") and stat("./") differ
+  AC_CACHE_CHECK([whether stat handles trailing slashes on directories],
+      [gl_cv_func_stat_dir_slash],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+           [[#include <sys/stat.h>
+]], [[struct stat st; return stat (".", &st) != stat ("./", &st);]])],
+         [gl_cv_func_stat_dir_slash=yes], [gl_cv_func_stat_dir_slash=no],
+         [case $host_os in
+            mingw*) gl_cv_func_stat_dir_slash="guessing no";;
+            *) gl_cv_func_stat_dir_slash="guessing yes";;
+          esac])])
+  dnl AIX 7.1, Solaris 9, mingw64 mistakenly succeed on stat("file/").
+  dnl (For mingw, this is due to a broken stat() override in libmingwex.a.)
+  dnl FreeBSD 7.2 mistakenly succeeds on stat("link-to-file/").
+  AC_CACHE_CHECK([whether stat handles trailing slashes on files],
+      [gl_cv_func_stat_file_slash],
+      [touch conftest.tmp
+       # Assume that if we have lstat, we can also check symlinks.
+       if test $ac_cv_func_lstat = yes; then
+         ln -s conftest.tmp conftest.lnk
+       fi
+       AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+           [[#include <sys/stat.h>
+]], [[int result = 0;
+      struct stat st;
+      if (!stat ("conftest.tmp/", &st))
+        result |= 1;
+#if HAVE_LSTAT
+      if (!stat ("conftest.lnk/", &st))
+        result |= 2;
+#endif
+      return result;
+           ]])],
+         [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
+         [case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-gnu*) gl_cv_func_stat_file_slash="guessing yes" ;;
+                    # If we don't know, assume the worst.
+            *)      gl_cv_func_stat_file_slash="guessing no" ;;
+          esac
+         ])
+       rm -f conftest.tmp conftest.lnk])
+  case $gl_cv_func_stat_dir_slash in
+    *no) REPLACE_STAT=1
+      AC_DEFINE([REPLACE_FUNC_STAT_DIR], [1], [Define to 1 if stat needs
+        help when passed a directory name with a trailing slash]);;
+  esac
+  case $gl_cv_func_stat_file_slash in
+    *no) REPLACE_STAT=1
+      AC_DEFINE([REPLACE_FUNC_STAT_FILE], [1], [Define to 1 if stat needs
+        help when passed a file name with a trailing slash]);;
+  esac
 ])
 
 # Prerequisites of lib/stat.c.
 AC_DEFUN([gl_PREREQ_STAT],
 [
+  AC_REQUIRE([AC_C_INLINE])
   :
 ])