1 # canonicalize.m4 serial 35
3 dnl Copyright (C) 2003-2007, 2009-2021 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_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
15 AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
16 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
17 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
18 if test $ac_cv_func_canonicalize_file_name = no; then
19 HAVE_CANONICALIZE_FILE_NAME=0
21 case "$gl_cv_func_realpath_works" in
23 *) REPLACE_CANONICALIZE_FILE_NAME=1 ;;
28 # Provides canonicalize_file_name and realpath.
29 AC_DEFUN([gl_CANONICALIZE_LGPL],
31 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
32 AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
33 if test $ac_cv_func_canonicalize_file_name = no; then
34 HAVE_CANONICALIZE_FILE_NAME=0
35 if test $ac_cv_func_realpath = no; then
38 case "$gl_cv_func_realpath_works" in
40 *) REPLACE_REALPATH=1 ;;
44 case "$gl_cv_func_realpath_works" in
48 REPLACE_CANONICALIZE_FILE_NAME=1
55 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
56 # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
57 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
59 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
60 AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
61 AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
63 dnl On native Windows, we use _getcwd(), regardless whether getcwd() is
64 dnl available through the linker option '-loldnames'.
65 AC_REQUIRE([AC_CANONICAL_HOST])
68 *) AC_CHECK_FUNCS([getcwd]) ;;
71 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
72 AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
73 AC_CHECK_HEADERS_ONCE([sys/param.h])
76 # Check whether realpath works. Assume that if a platform has both
77 # realpath and canonicalize_file_name, but the former is broken, then
79 AC_DEFUN([gl_FUNC_REALPATH_WORKS],
81 AC_CHECK_FUNCS_ONCE([realpath])
82 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
83 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
84 rm -rf conftest.a conftest.d
95 char *name = realpath ("conftest.a", NULL);
96 if (!(name && *name == '/'))
101 char *name = realpath ("conftest.b/../conftest.a", NULL);
107 char *name = realpath ("conftest.a/", NULL);
113 char *name1 = realpath (".", NULL);
114 char *name2 = realpath ("conftest.d//./..", NULL);
115 if (! name1 || ! name2 || strcmp (name1, name2))
123 [gl_cv_func_realpath_works=yes],
124 [gl_cv_func_realpath_works=no],
126 # Guess yes on glibc systems.
127 *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
128 # Guess yes on musl systems.
129 *-musl*) gl_cv_func_realpath_works="guessing yes" ;;
130 # Guess no on native Windows.
131 mingw*) gl_cv_func_realpath_works="guessing no" ;;
132 # If we don't know, obey --enable-cross-guesses.
133 *) gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
136 rm -rf conftest.a conftest.d
138 case "$gl_cv_func_realpath_works" in
140 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
141 can malloc memory, always gives an absolute path, and handles
142 trailing slash correctly.])