-#serial 3
+# canonicalize.m4 serial 17
-# Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+dnl Copyright (C) 2003-2007, 2009-2011 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
+# Provides canonicalize_file_name and canonicalize_filename_mode, but does
+# not provide or fix realpath.
+AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
+[
+ AC_LIBOBJ([canonicalize])
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_FUNCS_ONCE([canonicalize_file_name])
+ AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
+ AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
+ if test $ac_cv_func_canonicalize_file_name = no; then
+ HAVE_CANONICALIZE_FILE_NAME=0
+ elif test "$gl_cv_func_realpath_works" != yes; then
+ REPLACE_CANONICALIZE_FILE_NAME=1
+ fi
+])
-# Written by Jim Meyering.
+# Provides canonicalize_file_name and realpath.
+AC_DEFUN([gl_CANONICALIZE_LGPL],
+[
+ AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
+ if test $ac_cv_func_canonicalize_file_name = no; then
+ HAVE_CANONICALIZE_FILE_NAME=0
+ AC_LIBOBJ([canonicalize-lgpl])
+ if test $ac_cv_func_realpath = no; then
+ HAVE_REALPATH=0
+ elif test "$gl_cv_func_realpath_works" != yes; then
+ REPLACE_REALPATH=1
+ fi
+ elif test "$gl_cv_func_realpath_works" != yes; then
+ AC_LIBOBJ([canonicalize-lgpl])
+ REPLACE_REALPATH=1
+ REPLACE_CANONICALIZE_FILE_NAME=1
+ fi
+])
-AC_DEFUN([AC_FUNC_CANONICALIZE_FILE_NAME],
- [
- AC_REQUIRE([AC_HEADER_STDC])
- AC_CHECK_HEADERS(string.h sys/param.h stddef.h)
- AC_CHECK_FUNCS(resolvepath canonicalize_file_name)
- AC_REQUIRE([AC_HEADER_STAT])
+# Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
+# (no AC_LIBOBJ).
+AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
+[
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink])
+ AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
+ AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
+ AC_CHECK_HEADERS_ONCE([sys/param.h])
+])
+
+# Check whether realpath works. Assume that if a platform has both
+# realpath and canonicalize_file_name, but the former is broken, then
+# so is the latter.
+AC_DEFUN([gl_FUNC_REALPATH_WORKS],
+[
+ AC_CHECK_FUNCS_ONCE([realpath])
+ AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
+ touch conftest.a
+ AC_RUN_IFELSE([
+ AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ ]], [[
+ int result = 0;
+ {
+ char *name = realpath ("conftest.a", NULL);
+ if (!(name && *name == '/'))
+ result |= 1;
+ }
+ {
+ char *name = realpath ("conftest.b/../conftest.a", NULL);
+ if (name != NULL)
+ result |= 2;
+ }
+ {
+ char *name = realpath ("conftest.a/", NULL);
+ if (name != NULL)
+ result |= 4;
+ }
+ return result;
+ ]])
+ ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
+ [gl_cv_func_realpath_works="guessing no"])
])
+ if test "$gl_cv_func_realpath_works" = yes; then
+ AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
+ can malloc memory, always gives an absolute path, and handles
+ trailing slash correctly.])
+ fi
+])