1# canonicalize.m4 serial 23 2 3dnl Copyright (C) 2003-2007, 2009-2011 Free Software Foundation, Inc. 4 5dnl This file is free software; the Free Software Foundation 6dnl gives unlimited permission to copy and/or distribute it, 7dnl with or without modifications, as long as this notice is preserved. 8 9# Provides canonicalize_file_name and canonicalize_filename_mode, but does 10# not provide or fix realpath. 11AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE], 12[ 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 $ac_cv_func_canonicalize_file_name = no; then 18 HAVE_CANONICALIZE_FILE_NAME=0 19 elif test "$gl_cv_func_realpath_works" != yes; then 20 REPLACE_CANONICALIZE_FILE_NAME=1 21 fi 22]) 23 24# Provides canonicalize_file_name and realpath. 25AC_DEFUN([gl_CANONICALIZE_LGPL], 26[ 27 AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) 28 AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE]) 29 if test $ac_cv_func_canonicalize_file_name = no; then 30 HAVE_CANONICALIZE_FILE_NAME=0 31 if test $ac_cv_func_realpath = no; then 32 HAVE_REALPATH=0 33 elif test "$gl_cv_func_realpath_works" != yes; then 34 REPLACE_REALPATH=1 35 fi 36 elif test "$gl_cv_func_realpath_works" != yes; then 37 REPLACE_CANONICALIZE_FILE_NAME=1 38 REPLACE_REALPATH=1 39 fi 40]) 41 42# Like gl_CANONICALIZE_LGPL, except prepare for separate compilation 43# (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ). 44AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE], 45[ 46 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) 47 AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink]) 48 AC_REQUIRE([gl_DOUBLE_SLASH_ROOT]) 49 AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) 50 AC_CHECK_HEADERS_ONCE([sys/param.h]) 51]) 52 53# Check whether realpath works. Assume that if a platform has both 54# realpath and canonicalize_file_name, but the former is broken, then 55# so is the latter. 56AC_DEFUN([gl_FUNC_REALPATH_WORKS], 57[ 58 AC_CHECK_FUNCS_ONCE([realpath]) 59 AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [ 60 touch conftest.a 61 mkdir conftest.d 62 AC_RUN_IFELSE([ 63 AC_LANG_PROGRAM([[ 64 ]GL_NOCRASH[ 65 #include <stdlib.h> 66 #include <string.h> 67 ]], [[ 68 int result = 0; 69 { 70 char *name = realpath ("conftest.a", NULL); 71 if (!(name && *name == '/')) 72 result |= 1; 73 } 74 { 75 char *name = realpath ("conftest.b/../conftest.a", NULL); 76 if (name != NULL) 77 result |= 2; 78 } 79 { 80 char *name = realpath ("conftest.a/", NULL); 81 if (name != NULL) 82 result |= 4; 83 } 84 { 85 char *name1 = realpath (".", NULL); 86 char *name2 = realpath ("conftest.d//./..", NULL); 87 if (strcmp (name1, name2) != 0) 88 result |= 8; 89 } 90 return result; 91 ]]) 92 ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no], 93 [gl_cv_func_realpath_works="guessing no"]) 94 rm -rf conftest.a conftest.d 95 ]) 96 if test "$gl_cv_func_realpath_works" = yes; then 97 AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath() 98 can malloc memory, always gives an absolute path, and handles 99 trailing slash correctly.]) 100 fi 101]) 102