Imported Upstream version 1.4

[debian/gzip] / m4 / stat.m4

diff --git a/m4/stat.m4 b/m4/stat.m4
index 0a10de14f3cf784518311a89709417f93b539707..acd32d86a084ea6cbfcbd47bf1c3a756b94ccf61 100644 (file)
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,6 +1,6 @@
-# serial 2
+# serial 4
 
-# Copyright (C) 2009 Free Software Foundation, Inc.
+# Copyright (C) 2009, 2010 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -11,6 +11,7 @@ AC_DEFUN([gl_FUNC_STAT],
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_REQUIRE([gl_AC_DOS])
   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],
@@ -24,15 +25,26 @@ AC_DEFUN([gl_FUNC_STAT],
             *) gl_cv_func_stat_dir_slash="guessing yes";;
           esac])])
   dnl Solaris 9 mistakenly succeeds on stat("file/")
+  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>
-]], [[struct stat st; return !stat ("conftest.tmp/", &st);]])],
+]], [[struct stat st;
+      if (!stat ("conftest.tmp/", &st)) return 1;
+#if HAVE_LSTAT
+      if (!stat ("conftest.lnk/", &st)) return 2;
+#endif
+           ]])],
          [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
-         [gl_cv_func_stat_file_slash="guessing no"])])
+         [gl_cv_func_stat_file_slash="guessing no"])
+       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
@@ -45,5 +57,7 @@ AC_DEFUN([gl_FUNC_STAT],
   esac
   if test $REPLACE_STAT = 1; then
     AC_LIBOBJ([stat])
+    dnl Prerequisites of lib/stat.c.
+    AC_REQUIRE([AC_C_INLINE])
   fi
 ])