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# canonicalize.m4 serial 16
dnl Copyright (C) 2003-2007, 2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Provides canonicalize_file_name and canonicalize_filename_mode, but does
# not provide or fix realpath.
AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
[
AC_LIBOBJ([canonicalize])
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_FUNCS_ONCE([canonicalize_file_name])
AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
if test $ac_cv_func_canonicalize_file_name = no; then
HAVE_CANONICALIZE_FILE_NAME=0
elif test "$gl_cv_func_realpath_works" != yes; then
REPLACE_CANONICALIZE_FILE_NAME=1
fi
])
# Provides canonicalize_file_name and realpath.
AC_DEFUN([gl_CANONICALIZE_LGPL],
[
AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
if test $ac_cv_func_canonicalize_file_name = no; then
HAVE_CANONICALIZE_FILE_NAME=0
AC_LIBOBJ([canonicalize-lgpl])
if test $ac_cv_func_realpath = no; then
HAVE_REALPATH=0
elif test "$gl_cv_func_realpath_works" != yes; then
REPLACE_REALPATH=1
fi
elif test "$gl_cv_func_realpath_works" != yes; then
AC_LIBOBJ([canonicalize-lgpl])
REPLACE_REALPATH=1
REPLACE_CANONICALIZE_FILE_NAME=1
fi
])
# Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
# (no AC_LIBOBJ).
AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
[
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink])
AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
AC_CHECK_HEADERS_ONCE([sys/param.h])
])
# Check whether realpath works. Assume that if a platform has both
# realpath and canonicalize_file_name, but the former is broken, then
# so is the latter.
AC_DEFUN([gl_FUNC_REALPATH_WORKS],
[
AC_CHECK_FUNCS_ONCE([realpath])
AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
touch conftest.a
AC_RUN_IFELSE([
AC_LANG_PROGRAM([[
#include <stdlib.h>
]], [[
char *name1 = realpath ("conftest.a", NULL);
char *name2 = realpath ("conftest.b/../conftest.a", NULL);
char *name3 = realpath ("conftest.a/", NULL);
return !(name1 && *name1 == '/' && !name2 && !name3);
]])
], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
[gl_cv_func_realpath_works="guessing no"])
])
if test "$gl_cv_func_realpath_works" = yes; then
AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
can malloc memory, always gives an absolute path, and handles
trailing slash correctly.])
fi
])
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