Commit | Line | Data |
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7a6dbc2f | 1 | # canonicalize.m4 serial 29 |
98399780 | 2 | |
7a6dbc2f | 3 | dnl Copyright (C) 2003-2007, 2009-2018 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 | |
7a6dbc2f SDJ |
38 | *yes) ;; |
39 | *) REPLACE_REALPATH=1 ;; | |
98399780 YQ |
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; | |
49e4877c | 86 | free (name); |
98399780 YQ |
87 | } |
88 | { | |
89 | char *name = realpath ("conftest.b/../conftest.a", NULL); | |
90 | if (name != NULL) | |
91 | result |= 2; | |
49e4877c | 92 | free (name); |
98399780 YQ |
93 | } |
94 | { | |
95 | char *name = realpath ("conftest.a/", NULL); | |
96 | if (name != NULL) | |
97 | result |= 4; | |
49e4877c | 98 | free (name); |
98399780 YQ |
99 | } |
100 | { | |
101 | char *name1 = realpath (".", NULL); | |
102 | char *name2 = realpath ("conftest.d//./..", NULL); | |
49e4877c | 103 | if (! name1 || ! name2 || strcmp (name1, name2)) |
98399780 | 104 | result |= 8; |
49e4877c PA |
105 | free (name1); |
106 | free (name2); | |
98399780 YQ |
107 | } |
108 | return result; | |
109 | ]]) | |
110 | ], | |
111 | [gl_cv_func_realpath_works=yes], | |
112 | [gl_cv_func_realpath_works=no], | |
113 | [case "$host_os" in | |
114 | # Guess yes on glibc systems. | |
115 | *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;; | |
7a6dbc2f SDJ |
116 | # Guess no on native Windows. |
117 | mingw*) gl_cv_func_realpath_works="guessing no" ;; | |
98399780 YQ |
118 | # If we don't know, assume the worst. |
119 | *) gl_cv_func_realpath_works="guessing no" ;; | |
120 | esac | |
121 | ]) | |
122 | rm -rf conftest.a conftest.d | |
123 | ]) | |
124 | case "$gl_cv_func_realpath_works" in | |
125 | *yes) | |
126 | AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath() | |
127 | can malloc memory, always gives an absolute path, and handles | |
128 | trailing slash correctly.]) | |
129 | ;; | |
130 | esac | |
131 | ]) |