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129 lines
3.7 KiB
129 lines
3.7 KiB
# canonicalize.m4 serial 28 |
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dnl Copyright (C) 2003-2007, 2009-2017 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_CHECK_FUNCS_ONCE([canonicalize_file_name]) |
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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_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink]) |
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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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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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# If we don't know, assume the worst. |
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*) gl_cv_func_realpath_works="guessing no" ;; |
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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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