1 # canonicalize.m4 serial 22
3 dnl Copyright (C) 2003-2007, 2009-2011 Free Software Foundation, Inc.
5 dnl This file is free software; the Free Software Foundation
6 dnl gives unlimited permission to copy and/or distribute it,
7 dnl with or without modifications, as long as this notice is preserved.
9 # Provides canonicalize_file_name and canonicalize_filename_mode, but does
10 # not provide or fix realpath.
11 AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
13 AC_LIBOBJ([canonicalize])
15 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
16 AC_CHECK_FUNCS_ONCE([canonicalize_file_name])
17 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
18 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
19 if test $ac_cv_func_canonicalize_file_name = no; then
20 HAVE_CANONICALIZE_FILE_NAME=0
21 elif test "$gl_cv_func_realpath_works" != yes; then
22 REPLACE_CANONICALIZE_FILE_NAME=1
26 # Provides canonicalize_file_name and realpath.
27 AC_DEFUN([gl_CANONICALIZE_LGPL],
29 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
30 AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
31 if test $ac_cv_func_canonicalize_file_name = no; then
32 HAVE_CANONICALIZE_FILE_NAME=0
33 if test $ac_cv_func_realpath = no; then
35 elif test "$gl_cv_func_realpath_works" != yes; then
38 elif test "$gl_cv_func_realpath_works" != yes; then
39 REPLACE_CANONICALIZE_FILE_NAME=1
44 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
45 # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
46 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
48 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
49 AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink])
50 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
51 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
52 AC_CHECK_HEADERS_ONCE([sys/param.h])
55 # Check whether realpath works. Assume that if a platform has both
56 # realpath and canonicalize_file_name, but the former is broken, then
58 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
60 AC_CHECK_FUNCS_ONCE([realpath])
61 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
72 char *name = realpath ("conftest.a", NULL);
73 if (!(name && *name == '/'))
77 char *name = realpath ("conftest.b/../conftest.a", NULL);
82 char *name = realpath ("conftest.a/", NULL);
87 char *name1 = realpath (".", NULL);
88 char *name2 = realpath ("conftest.d//./..", NULL);
89 if (strcmp (name1, name2) != 0)
94 ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
95 [gl_cv_func_realpath_works="guessing no"])
96 rm -rf conftest.a conftest.d
98 if test "$gl_cv_func_realpath_works" = yes; then
99 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
100 can malloc memory, always gives an absolute path, and handles
101 trailing slash correctly.])