stat: Update regarding AIX.

[gnulib.git] / m4 / lstat.m4

diff --git a/m4/lstat.m4 b/m4/lstat.m4
index 1544027..5dbd16e 100644 (file)
--- a/m4/lstat.m4
+++ b/m4/lstat.m4
@@ -1,27 +1,28 @@
-#serial 8
+# 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_FUNC_LSTAT
-  dnl Note: AC_FUNC_LSTAT does AC_LIBOBJ(lstat).
-  if test $ac_cv_func_lstat_empty_string_bug = yes; then
-    gl_PREREQ_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
 ])
-
-# Prerequisites of lib/lstat.c.
-AC_DEFUN([gl_PREREQ_LSTAT],
-[
-  AC_REQUIRE([AC_HEADER_STAT])
-  AC_CHECK_HEADERS_ONCE(stdlib.h)
-  AC_CHECK_DECLS_ONCE(free)
-])