1 # canonicalize.m4 serial 15
3 dnl Copyright (C) 2003-2007, 2009 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_FUNC_REALPATH_WORKS])
18 if test $ac_cv_func_canonicalize_file_name = no; then
19 HAVE_CANONICALIZE_FILE_NAME=0
20 elif test $gl_cv_func_realpath_works != yes; then
21 REPLACE_CANONICALIZE_FILE_NAME=1
25 # Provides canonicalize_file_name and realpath.
26 AC_DEFUN([gl_CANONICALIZE_LGPL],
28 AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
29 if test $ac_cv_func_canonicalize_file_name = no; then
30 HAVE_CANONICALIZE_FILE_NAME=0
31 AC_LIBOBJ([canonicalize-lgpl])
32 if test $ac_cv_func_realpath = no; then
34 elif test $gl_cv_func_realpath_works != yes; then
37 elif test $gl_cv_func_realpath_works != yes; then
38 AC_LIBOBJ([canonicalize-lgpl])
40 REPLACE_CANONICALIZE_FILE_NAME=1
44 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
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_FUNC_REALPATH_WORKS])
51 AC_CHECK_HEADERS_ONCE([sys/param.h])
54 # Check whether realpath works. Assume that if a platform has both
55 # realpath and canonicalize_file_name, but the former is broken, then
57 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
59 AC_CHECK_FUNCS_ONCE([realpath])
60 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
66 char *name1 = realpath ("conftest.a", NULL);
67 char *name2 = realpath ("conftest.b/../conftest.a", NULL);
68 char *name3 = realpath ("conftest.a/", NULL);
69 return !(name1 && *name1 == '/' && !name2 && !name3);
71 ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
72 [gl_cv_func_realpath_works="guessing no"])
74 if test $gl_cv_func_realpath_works = yes; then
75 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
76 can malloc memory, always gives an absolute path, and handles
77 trailing slash correctly.])