projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 98399780 YQ |
1 | # canonicalize.m4 serial 26 |
| 2 | ||
| 4a626d0a | 3 | dnl Copyright (C) 2003-2007, 2009-2015 Free Software Foundation, Inc. |
| 98399780 YQ |
4 | |
| 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. | |
| 8 | ||
| 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], | |
| 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 $ac_cv_func_canonicalize_file_name = no; then | |
| 18 | HAVE_CANONICALIZE_FILE_NAME=0 | |
| 19 | else | |
| 20 | case "$gl_cv_func_realpath_works" in | |
| 21 | *yes) ;; | |
| 22 | *) REPLACE_CANONICALIZE_FILE_NAME=1 ;; | |
| 23 | esac | |
| 24 | fi | |
| 25 | ]) | |
| 26 | ||
| 27 | # Provides canonicalize_file_name and realpath. | |
| 28 | AC_DEFUN([gl_CANONICALIZE_LGPL], | |
| 29 | [ | |
| 30 | AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) | |
| 31 | AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE]) | |
| 32 | if test $ac_cv_func_canonicalize_file_name = no; then | |
| 33 | HAVE_CANONICALIZE_FILE_NAME=0 | |
| 34 | if test $ac_cv_func_realpath = no; then | |
| 35 | HAVE_REALPATH=0 | |
| 36 | else | |
| 37 | case "$gl_cv_func_realpath_works" in | |
| 38 | *yes) ;; | |
| 39 | *) REPLACE_REALPATH=1 ;; | |
| 40 | esac | |
| 41 | fi | |
| 42 | else | |
| 43 | case "$gl_cv_func_realpath_works" in | |
| 44 | *yes) | |
| 45 | ;; | |
| 46 | *) | |
| 47 | REPLACE_CANONICALIZE_FILE_NAME=1 | |
| 48 | REPLACE_REALPATH=1 | |
| 49 | ;; | |
| 50 | esac | |
| 51 | fi | |
| 52 | ]) | |
| 53 | ||
| 54 | # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation | |
| 55 | # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ). | |
| 56 | AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE], | |
| 57 | [ | |
| 58 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
| 59 | AC_CHECK_FUNCS_ONCE([canonicalize_file_name getcwd readlink]) | |
| 60 | AC_REQUIRE([gl_DOUBLE_SLASH_ROOT]) | |
| 61 | AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) | |
| 62 | AC_CHECK_HEADERS_ONCE([sys/param.h]) | |
| 63 | ]) | |
| 64 | ||
| 65 | # Check whether realpath works. Assume that if a platform has both | |
| 66 | # realpath and canonicalize_file_name, but the former is broken, then | |
| 67 | # so is the latter. | |
| 68 | AC_DEFUN([gl_FUNC_REALPATH_WORKS], | |
| 69 | [ | |
| 70 | AC_CHECK_FUNCS_ONCE([realpath]) | |
| 71 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
| 72 | AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [ | |
| 73 | touch conftest.a | |
| 74 | mkdir conftest.d | |
| 75 | AC_RUN_IFELSE([ | |
| 76 | AC_LANG_PROGRAM([[ | |
| 77 | ]GL_NOCRASH[ | |
| 78 | #include <stdlib.h> | |
| 79 | #include <string.h> | |
| 80 | ]], [[ | |
| 81 | int result = 0; | |
| 82 | { | |
| 83 | char *name = realpath ("conftest.a", NULL); | |
| 84 | if (!(name && *name == '/')) | |
| 85 | result |= 1; | |
| 86 | } | |
| 87 | { | |
| 88 | char *name = realpath ("conftest.b/../conftest.a", NULL); | |
| 89 | if (name != NULL) | |
| 90 | result |= 2; | |
| 91 | } | |
| 92 | { | |
| 93 | char *name = realpath ("conftest.a/", NULL); | |
| 94 | if (name != NULL) | |
| 95 | result |= 4; | |
| 96 | } | |
| 97 | { | |
| 98 | char *name1 = realpath (".", NULL); | |
| 99 | char *name2 = realpath ("conftest.d//./..", NULL); | |
| 100 | if (strcmp (name1, name2) != 0) | |
| 101 | result |= 8; | |
| 102 | } | |
| 103 | return result; | |
| 104 | ]]) | |
| 105 | ], | |
| 106 | [gl_cv_func_realpath_works=yes], | |
| 107 | [gl_cv_func_realpath_works=no], | |
| 108 | [case "$host_os" in | |
| 109 | # Guess yes on glibc systems. | |
| 110 | *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;; | |
| 111 | # If we don't know, assume the worst. | |
| 112 | *) gl_cv_func_realpath_works="guessing no" ;; | |
| 113 | esac | |
| 114 | ]) | |
| 115 | rm -rf conftest.a conftest.d | |
| 116 | ]) | |
| 117 | case "$gl_cv_func_realpath_works" in | |
| 118 | *yes) | |
| 119 | AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath() | |
| 120 | can malloc memory, always gives an absolute path, and handles | |
| 121 | trailing slash correctly.]) | |
| 122 | ;; | |
| 123 | esac | |
| 124 | ]) |