1 # canonicalize.m4 serial 33
3 dnl Copyright (C) 2003-2007, 2009-2020 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 $ac_cv_func_canonicalize_file_name = no; then
18 HAVE_CANONICALIZE_FILE_NAME=0
20 case "$gl_cv_func_realpath_works" in
22 *) REPLACE_CANONICALIZE_FILE_NAME=1 ;;
27 # Provides canonicalize_file_name and realpath.
28 AC_DEFUN([gl_CANONICALIZE_LGPL],
30 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
31 AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
32 if test $ac_cv_func_canonicalize_file_name = no; then
33 HAVE_CANONICALIZE_FILE_NAME=0
34 if test $ac_cv_func_realpath = no; then
37 case "$gl_cv_func_realpath_works" in
39 *) REPLACE_REALPATH=1 ;;
43 case "$gl_cv_func_realpath_works" in
47 REPLACE_CANONICALIZE_FILE_NAME=1
54 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
55 # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
56 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
58 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
59 AC_CHECK_FUNCS_ONCE([canonicalize_file_name readlink])
61 dnl On native Windows, we use _getcwd(), regardless whether getcwd() is
62 dnl available through the linker option '-loldnames'.
63 AC_REQUIRE([AC_CANONICAL_HOST])
66 *) AC_CHECK_FUNCS([getcwd]) ;;
69 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
70 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
71 AC_CHECK_HEADERS_ONCE([sys/param.h])
74 # Check whether realpath works. Assume that if a platform has both
75 # realpath and canonicalize_file_name, but the former is broken, then
77 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
79 AC_CHECK_FUNCS_ONCE([realpath])
80 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
81 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
82 rm -rf conftest.a conftest.d
93 char *name = realpath ("conftest.a", NULL);
94 if (!(name && *name == '/'))
99 char *name = realpath ("conftest.b/../conftest.a", NULL);
105 char *name = realpath ("conftest.a/", NULL);
111 char *name1 = realpath (".", NULL);
112 char *name2 = realpath ("conftest.d//./..", NULL);
113 if (! name1 || ! name2 || strcmp (name1, name2))
121 [gl_cv_func_realpath_works=yes],
122 [gl_cv_func_realpath_works=no],
124 # Guess yes on glibc systems.
125 *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
126 # Guess yes on musl systems.
127 *-musl*) gl_cv_func_realpath_works="guessing yes" ;;
128 # Guess no on native Windows.
129 mingw*) gl_cv_func_realpath_works="guessing no" ;;
130 # If we don't know, obey --enable-cross-guesses.
131 *) gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
134 rm -rf conftest.a conftest.d
136 case "$gl_cv_func_realpath_works" in
138 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
139 can malloc memory, always gives an absolute path, and handles
140 trailing slash correctly.])