X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Flstat.m4;h=5dbd16e28ffe875a46d4696df5a4a164b32b929f;hb=0167c1923d0791e0e1491a856292b0945621c4e2;hp=59d7191f68a90a748fe4007fe8f2409af6b4382a;hpb=0d1d61835135da48448b5f09ada9f67c35ca4b97;p=gnulib.git

diff --git a/m4/lstat.m4 b/m4/lstat.m4
index 59d7191f6..5dbd16e28 100644
--- a/m4/lstat.m4
+++ b/m4/lstat.m4
@@ -1,24 +1,28 @@
-#serial 13
+# serial 20
 
-# Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 Free Software
-# Foundation, Inc.
+# 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 SunOS 4.1.4 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([gl_FUNC_LSTAT],
 [
-  AC_REQUIRE([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
-  dnl Note: AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK does AC_LIBOBJ(lstat).
-  :
+  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
 ])