X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstat.m4;h=1ae327b3684511fe1e6ab5dec7b973c13416d03e;hb=46f5f314f34a08c9305758482d7d2fdb0e999d09;hp=87d3e540dfeab0f02ec590f9f8833c49a30ca886;hpb=a965c0038c4b72af2497d3ec44aeb4587c2478d5;p=gnulib.git

diff --git a/m4/stat.m4 b/m4/stat.m4
index 87d3e540d..1ae327b36 100644
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,40 +1,71 @@
-#serial 6
+# serial 11
 
-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 SunOS4.1.4 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
+# Copyright (C) 2009-2014 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.
 
-AC_DEFUN(jm_FUNC_STAT,
+AC_DEFUN([gl_FUNC_STAT],
 [
- AC_REQUIRE([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
- AC_CACHE_CHECK([whether stat accepts an empty string],
-  jm_cv_func_stat_empty_string_bug,
-  [AC_TRY_RUN([
-#   include <sys/types.h>
-#   include <sys/stat.h>
-
-    int
-    main ()
-    {
-      struct stat sbuf;
-      exit (stat ("", &sbuf) ? 1 : 0);
-    }
-	  ],
-	 jm_cv_func_stat_empty_string_bug=yes,
-	 jm_cv_func_stat_empty_string_bug=no,
-	 dnl When crosscompiling, assume stat is broken.
-	 jm_cv_func_stat_empty_string_bug=yes)
-  ])
-  if test $jm_cv_func_stat_empty_string_bug = yes; then
-    AC_LIBOBJ([stat])
-    AC_DEFINE_UNQUOTED(HAVE_STAT_EMPTY_STRING_BUG, 1,
-[Define if stat has the bug that it succeeds when given the zero-length
-   file name argument.  The stat from SunOS4.1.4 and the Hurd as of 1998-11-01)
-   do this. ])
-  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], [:])