X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Flstat.m4;h=5dbd16e28ffe875a46d4696df5a4a164b32b929f;hb=6101082ea07a4877e51042244c9c3b57920c2b62;hp=e93beef3f58fc3b16b296a9f51b2be01322ae914;hpb=a965c0038c4b72af2497d3ec44aeb4587c2478d5;p=gnulib.git

diff --git a/m4/lstat.m4 b/m4/lstat.m4
index e93beef3f..5dbd16e28 100644
--- a/m4/lstat.m4
+++ b/m4/lstat.m4
@@ -1,40 +1,28 @@
-#serial 6
+# serial 20
+
+# Copyright (C) 1997-2001, 2003-2010 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 lstat has the bug that it succeeds when given the
-dnl zero-length file name argument.  The lstat from SunOS4.1.4 and the Hurd
-dnl (as of 1998-11-01) do this.
-dnl
-dnl If it does, then define HAVE_LSTAT_EMPTY_STRING_BUG and arrange to
-dnl compile the wrapper function.
-dnl
 
-AC_DEFUN(jm_FUNC_LSTAT,
+AC_DEFUN([gl_FUNC_LSTAT],
 [
- AC_REQUIRE([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
- AC_CACHE_CHECK([whether lstat accepts an empty string],
-  jm_cv_func_lstat_empty_string_bug,
-  [AC_TRY_RUN([
-#   include <sys/types.h>
-#   include <sys/stat.h>
-
-    int
-    main ()
-    {
-      struct stat sbuf;
-      exit (lstat ("", &sbuf) ? 1 : 0);
-    }
-	  ],
-	 jm_cv_func_lstat_empty_string_bug=yes,
-	 jm_cv_func_lstat_empty_string_bug=no,
-	 dnl When crosscompiling, assume lstat is broken.
-	 jm_cv_func_lstat_empty_string_bug=yes)
-  ])
-  if test $jm_cv_func_lstat_empty_string_bug = yes; then
-    AC_LIBOBJ([lstat])
-    AC_DEFINE_UNQUOTED(HAVE_LSTAT_EMPTY_STRING_BUG, 1,
-[Define if lstat has the bug that it succeeds when given the zero-length
-   file name argument.  The lstat from SunOS4.1.4 and the Hurd as of 1998-11-01)
-   do this. ])
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  dnl If lstat does not exist, the replacement <sys/stat.h> does
+  dnl "#define lstat stat", and lstat.c is a no-op.
+  AC_CHECK_FUNCS_ONCE([lstat])
+  if test $ac_cv_func_lstat = yes; then
+    AC_REQUIRE([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+    if test $ac_cv_func_lstat_dereferences_slashed_symlink = no; then
+      dnl Note: AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK does AC_LIBOBJ([lstat]).
+      REPLACE_LSTAT=1
+    fi
+    # Prerequisites of lib/lstat.c.
+    AC_REQUIRE([AC_C_INLINE])
+  else
+    HAVE_LSTAT=0
   fi
 ])