145 lines
4.4 KiB
Text
145 lines
4.4 KiB
Text
# canonicalize.m4 serial 35
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dnl Copyright (C) 2003-2007, 2009-2021 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# Provides canonicalize_file_name and canonicalize_filename_mode, but does
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# not provide or fix realpath.
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AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
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[
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
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AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
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AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
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AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
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if test $ac_cv_func_canonicalize_file_name = no; then
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HAVE_CANONICALIZE_FILE_NAME=0
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else
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case "$gl_cv_func_realpath_works" in
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*yes) ;;
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*) REPLACE_CANONICALIZE_FILE_NAME=1 ;;
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esac
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fi
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])
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# Provides canonicalize_file_name and realpath.
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AC_DEFUN([gl_CANONICALIZE_LGPL],
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[
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
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if test $ac_cv_func_canonicalize_file_name = no; then
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HAVE_CANONICALIZE_FILE_NAME=0
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if test $ac_cv_func_realpath = no; then
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HAVE_REALPATH=0
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else
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case "$gl_cv_func_realpath_works" in
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*yes) ;;
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*) REPLACE_REALPATH=1 ;;
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esac
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fi
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else
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case "$gl_cv_func_realpath_works" in
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*yes)
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;;
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*)
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REPLACE_CANONICALIZE_FILE_NAME=1
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REPLACE_REALPATH=1
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;;
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esac
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fi
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])
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# Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
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# (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
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AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
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[
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
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AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
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dnl On native Windows, we use _getcwd(), regardless whether getcwd() is
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dnl available through the linker option '-loldnames'.
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AC_REQUIRE([AC_CANONICAL_HOST])
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case "$host_os" in
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mingw*) ;;
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*) AC_CHECK_FUNCS([getcwd]) ;;
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esac
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AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
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AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
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AC_CHECK_HEADERS_ONCE([sys/param.h])
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])
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# Check whether realpath works. Assume that if a platform has both
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# realpath and canonicalize_file_name, but the former is broken, then
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# so is the latter.
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AC_DEFUN([gl_FUNC_REALPATH_WORKS],
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[
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AC_CHECK_FUNCS_ONCE([realpath])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
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rm -rf conftest.a conftest.d
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touch conftest.a
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mkdir conftest.d
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AC_RUN_IFELSE([
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AC_LANG_PROGRAM([[
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]GL_NOCRASH[
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#include <stdlib.h>
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#include <string.h>
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]], [[
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int result = 0;
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{
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char *name = realpath ("conftest.a", NULL);
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if (!(name && *name == '/'))
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result |= 1;
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free (name);
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}
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{
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char *name = realpath ("conftest.b/../conftest.a", NULL);
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if (name != NULL)
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result |= 2;
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free (name);
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}
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{
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char *name = realpath ("conftest.a/", NULL);
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if (name != NULL)
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result |= 4;
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free (name);
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}
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{
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char *name1 = realpath (".", NULL);
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char *name2 = realpath ("conftest.d//./..", NULL);
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if (! name1 || ! name2 || strcmp (name1, name2))
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result |= 8;
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free (name1);
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free (name2);
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}
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return result;
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]])
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],
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[gl_cv_func_realpath_works=yes],
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[gl_cv_func_realpath_works=no],
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[case "$host_os" in
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_realpath_works="guessing yes" ;;
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# Guess no on native Windows.
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mingw*) gl_cv_func_realpath_works="guessing no" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
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esac
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])
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rm -rf conftest.a conftest.d
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])
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case "$gl_cv_func_realpath_works" in
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*yes)
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AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()
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can malloc memory, always gives an absolute path, and handles
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trailing slash correctly.])
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;;
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esac
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])
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