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9c9d63b1 | 1 | # canonicalize.m4 serial 35 |
98399780 | 2 | |
9c9d63b1 | 3 | dnl Copyright (C) 2003-2007, 2009-2021 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]) | |
9c9d63b1 PM |
14 | AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) |
15 | AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat]) | |
98399780 YQ |
16 | AC_REQUIRE([gl_DOUBLE_SLASH_ROOT]) |
17 | AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) | |
18 | if test $ac_cv_func_canonicalize_file_name = no; then | |
19 | HAVE_CANONICALIZE_FILE_NAME=0 | |
20 | else | |
21 | case "$gl_cv_func_realpath_works" in | |
22 | *yes) ;; | |
23 | *) REPLACE_CANONICALIZE_FILE_NAME=1 ;; | |
24 | esac | |
25 | fi | |
26 | ]) | |
27 | ||
28 | # Provides canonicalize_file_name and realpath. | |
29 | AC_DEFUN([gl_CANONICALIZE_LGPL], | |
30 | [ | |
31 | AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) | |
32 | AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE]) | |
33 | if test $ac_cv_func_canonicalize_file_name = no; then | |
34 | HAVE_CANONICALIZE_FILE_NAME=0 | |
35 | if test $ac_cv_func_realpath = no; then | |
36 | HAVE_REALPATH=0 | |
37 | else | |
38 | case "$gl_cv_func_realpath_works" in | |
c0c3707f CB |
39 | *yes) ;; |
40 | *) REPLACE_REALPATH=1 ;; | |
98399780 YQ |
41 | esac |
42 | fi | |
43 | else | |
44 | case "$gl_cv_func_realpath_works" in | |
45 | *yes) | |
46 | ;; | |
47 | *) | |
48 | REPLACE_CANONICALIZE_FILE_NAME=1 | |
49 | REPLACE_REALPATH=1 | |
50 | ;; | |
51 | esac | |
52 | fi | |
53 | ]) | |
54 | ||
55 | # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation | |
56 | # (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ). | |
57 | AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE], | |
58 | [ | |
59 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
9c9d63b1 PM |
60 | AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) |
61 | AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat]) | |
62 | ||
63 | dnl On native Windows, we use _getcwd(), regardless whether getcwd() is | |
64 | dnl available through the linker option '-loldnames'. | |
65 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
66 | case "$host_os" in | |
67 | mingw*) ;; | |
68 | *) AC_CHECK_FUNCS([getcwd]) ;; | |
69 | esac | |
70 | ||
98399780 YQ |
71 | AC_REQUIRE([gl_DOUBLE_SLASH_ROOT]) |
72 | AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) | |
73 | AC_CHECK_HEADERS_ONCE([sys/param.h]) | |
74 | ]) | |
75 | ||
76 | # Check whether realpath works. Assume that if a platform has both | |
77 | # realpath and canonicalize_file_name, but the former is broken, then | |
78 | # so is the latter. | |
79 | AC_DEFUN([gl_FUNC_REALPATH_WORKS], | |
80 | [ | |
81 | AC_CHECK_FUNCS_ONCE([realpath]) | |
82 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
83 | AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [ | |
9c9d63b1 | 84 | rm -rf conftest.a conftest.d |
98399780 YQ |
85 | touch conftest.a |
86 | mkdir conftest.d | |
87 | AC_RUN_IFELSE([ | |
88 | AC_LANG_PROGRAM([[ | |
89 | ]GL_NOCRASH[ | |
90 | #include <stdlib.h> | |
91 | #include <string.h> | |
92 | ]], [[ | |
93 | int result = 0; | |
94 | { | |
95 | char *name = realpath ("conftest.a", NULL); | |
96 | if (!(name && *name == '/')) | |
97 | result |= 1; | |
49e4877c | 98 | free (name); |
98399780 YQ |
99 | } |
100 | { | |
101 | char *name = realpath ("conftest.b/../conftest.a", NULL); | |
102 | if (name != NULL) | |
103 | result |= 2; | |
49e4877c | 104 | free (name); |
98399780 YQ |
105 | } |
106 | { | |
107 | char *name = realpath ("conftest.a/", NULL); | |
108 | if (name != NULL) | |
109 | result |= 4; | |
49e4877c | 110 | free (name); |
98399780 YQ |
111 | } |
112 | { | |
113 | char *name1 = realpath (".", NULL); | |
114 | char *name2 = realpath ("conftest.d//./..", NULL); | |
49e4877c | 115 | if (! name1 || ! name2 || strcmp (name1, name2)) |
98399780 | 116 | result |= 8; |
49e4877c PA |
117 | free (name1); |
118 | free (name2); | |
98399780 YQ |
119 | } |
120 | return result; | |
121 | ]]) | |
122 | ], | |
123 | [gl_cv_func_realpath_works=yes], | |
124 | [gl_cv_func_realpath_works=no], | |
125 | [case "$host_os" in | |
126 | # Guess yes on glibc systems. | |
127 | *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;; | |
c0c3707f CB |
128 | # Guess yes on musl systems. |
129 | *-musl*) gl_cv_func_realpath_works="guessing yes" ;; | |
130 | # Guess no on native Windows. | |
131 | mingw*) gl_cv_func_realpath_works="guessing no" ;; | |
132 | # If we don't know, obey --enable-cross-guesses. | |
133 | *) gl_cv_func_realpath_works="$gl_cross_guess_normal" ;; | |
98399780 YQ |
134 | esac |
135 | ]) | |
136 | rm -rf conftest.a conftest.d | |
137 | ]) | |
138 | case "$gl_cv_func_realpath_works" in | |
139 | *yes) | |
140 | AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath() | |
141 | can malloc memory, always gives an absolute path, and handles | |
142 | trailing slash correctly.]) | |
143 | ;; | |
144 | esac | |
145 | ]) |