1 # canonicalize.m4 serial 21
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 AC_LIBOBJ([canonicalize-lgpl])
34 if test $ac_cv_func_realpath = no; then
36 elif test "$gl_cv_func_realpath_works" != yes; then
39 elif test "$gl_cv_func_realpath_works" != yes; then
40 AC_LIBOBJ([canonicalize-lgpl])
42 REPLACE_CANONICALIZE_FILE_NAME=1
46 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
47 # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
48 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
50 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
51 AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink])
52 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
53 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
54 AC_CHECK_HEADERS_ONCE([sys/param.h])
57 # Check whether realpath works. Assume that if a platform has both
58 # realpath and canonicalize_file_name, but the former is broken, then
60 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
62 AC_CHECK_FUNCS_ONCE([realpath])
63 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
74 char *name = realpath ("conftest.a", NULL);
75 if (!(name && *name == '/'))
79 char *name = realpath ("conftest.b/../conftest.a", NULL);
84 char *name = realpath ("conftest.a/", NULL);
89 char *name1 = realpath (".", NULL);
90 char *name2 = realpath ("conftest.d//./..", NULL);
91 if (strcmp (name1, name2) != 0)
96 ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
97 [gl_cv_func_realpath_works="guessing no"])
98 rm -rf conftest.a conftest.d
100 if test "$gl_cv_func_realpath_works" = yes; then
101 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
102 can malloc memory, always gives an absolute path, and handles
103 trailing slash correctly.])