1 # canonicalize.m4 serial 23
3 dnl Copyright (C) 2003-2007, 2009-2012 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_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
14 AC_CHECK_FUNCS_ONCE([canonicalize_file_name])
15 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
16 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
17 if test $ac_cv_func_canonicalize_file_name = no; then
18 HAVE_CANONICALIZE_FILE_NAME=0
19 elif test "$gl_cv_func_realpath_works" != yes; then
20 REPLACE_CANONICALIZE_FILE_NAME=1
24 # Provides canonicalize_file_name and realpath.
25 AC_DEFUN([gl_CANONICALIZE_LGPL],
27 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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 if test $ac_cv_func_realpath = no; then
33 elif test "$gl_cv_func_realpath_works" != yes; then
36 elif test "$gl_cv_func_realpath_works" != yes; then
37 REPLACE_CANONICALIZE_FILE_NAME=1
42 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
43 # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
44 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
46 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
47 AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink])
48 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
49 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
50 AC_CHECK_HEADERS_ONCE([sys/param.h])
53 # Check whether realpath works. Assume that if a platform has both
54 # realpath and canonicalize_file_name, but the former is broken, then
56 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
58 AC_CHECK_FUNCS_ONCE([realpath])
59 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
70 char *name = realpath ("conftest.a", NULL);
71 if (!(name && *name == '/'))
75 char *name = realpath ("conftest.b/../conftest.a", NULL);
80 char *name = realpath ("conftest.a/", NULL);
85 char *name1 = realpath (".", NULL);
86 char *name2 = realpath ("conftest.d//./..", NULL);
87 if (strcmp (name1, name2) != 0)
92 ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
93 [gl_cv_func_realpath_works="guessing no"])
94 rm -rf conftest.a conftest.d
96 if test "$gl_cv_func_realpath_works" = yes; then
97 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
98 can malloc memory, always gives an absolute path, and handles
99 trailing slash correctly.])