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1 # Check for fnmatch - serial 4.
2
3 # Copyright (C) 2000-2007, 2009-2010 Free Software Foundation, Inc.
4 # This file is free software; the Free Software Foundation
5 # gives unlimited permission to copy and/or distribute it,
6 # with or without modifications, as long as this notice is preserved.
7
8 # Autoconf defines AC_FUNC_FNMATCH, but that is obsolescent.
9 # New applications should use the macros below instead.
10
11 # Request a POSIX compliant fnmatch function.
12 AC_DEFUN([gl_FUNC_FNMATCH_POSIX],
13 [
14   m4_divert_text([DEFAULTS], [gl_fnmatch_required=POSIX])
15
16   dnl Persuade glibc <fnmatch.h> to declare FNM_CASEFOLD etc.
17   dnl This is only needed if gl_fnmatch_required = GNU. It would be possible
18   dnl to avoid this dependency for gl_FUNC_FNMATCH_POSIX by putting
19   dnl gl_FUNC_FNMATCH_GNU into a separate .m4 file.
20   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
21
22   FNMATCH_H=
23   gl_fnmatch_required_lowercase=`
24     echo $gl_fnmatch_required | tr '[[A-Z]]' '[[a-z]]'
25   `
26   gl_fnmatch_cache_var="gl_cv_func_fnmatch_${gl_fnmatch_required_lowercase}"
27   AC_CACHE_CHECK([for working $gl_fnmatch_required fnmatch],
28     [$gl_fnmatch_cache_var],
29     [dnl Some versions of Solaris, SCO, and the GNU C Library
30      dnl have a broken or incompatible fnmatch.
31      dnl So we run a test program.  If we are cross-compiling, take no chance.
32      dnl Thanks to John Oleynick, François Pinard, and Paul Eggert for this
33      dnl test.
34      if test $gl_fnmatch_required = GNU; then
35        gl_fnmatch_gnu_start=
36        gl_fnmatch_gnu_end=
37      else
38        gl_fnmatch_gnu_start='#if 0'
39        gl_fnmatch_gnu_end='#endif'
40      fi
41      AC_RUN_IFELSE(
42        [AC_LANG_PROGRAM(
43           [[#include <fnmatch.h>
44             static int
45             y (char const *pattern, char const *string, int flags)
46             {
47               return fnmatch (pattern, string, flags) == 0;
48             }
49             static int
50             n (char const *pattern, char const *string, int flags)
51             {
52               return fnmatch (pattern, string, flags) == FNM_NOMATCH;
53             }
54           ]],
55           [[char const *Apat = 'A' < '\\\\' ? "[A-\\\\\\\\]" : "[\\\\\\\\-A]";
56             char const *apat = 'a' < '\\\\' ? "[a-\\\\\\\\]" : "[\\\\\\\\-a]";
57             static char const A_1[] = { 'A' - 1, 0 };
58             static char const A01[] = { 'A' + 1, 0 };
59             static char const a_1[] = { 'a' - 1, 0 };
60             static char const a01[] = { 'a' + 1, 0 };
61             static char const bs_1[] = { '\\\\' - 1, 0 };
62             static char const bs01[] = { '\\\\' + 1, 0 };
63             return
64              !(n ("a*", "", 0)
65                && y ("a*", "abc", 0)
66                && n ("d*/*1", "d/s/1", FNM_PATHNAME)
67                && y ("a\\\\bc", "abc", 0)
68                && n ("a\\\\bc", "abc", FNM_NOESCAPE)
69                && y ("*x", ".x", 0)
70                && n ("*x", ".x", FNM_PERIOD)
71                && y (Apat, "\\\\", 0) && y (Apat, "A", 0)
72                && y (apat, "\\\\", 0) && y (apat, "a", 0)
73                && n (Apat, A_1, 0) == ('A' < '\\\\')
74                && n (apat, a_1, 0) == ('a' < '\\\\')
75                && y (Apat, A01, 0) == ('A' < '\\\\')
76                && y (apat, a01, 0) == ('a' < '\\\\')
77                && y (Apat, bs_1, 0) == ('A' < '\\\\')
78                && y (apat, bs_1, 0) == ('a' < '\\\\')
79                && n (Apat, bs01, 0) == ('A' < '\\\\')
80                && n (apat, bs01, 0) == ('a' < '\\\\')
81                $gl_fnmatch_gnu_start
82                && y ("xxXX", "xXxX", FNM_CASEFOLD)
83                && y ("a++(x|yy)b", "a+xyyyyxb", FNM_EXTMATCH)
84                && n ("d*/*1", "d/s/1", FNM_FILE_NAME)
85                && y ("*", "x", FNM_FILE_NAME | FNM_LEADING_DIR)
86                && y ("x*", "x/y/z", FNM_FILE_NAME | FNM_LEADING_DIR)
87                && y ("*c*", "c/x", FNM_FILE_NAME | FNM_LEADING_DIR)
88                $gl_fnmatch_gnu_end
89               );
90           ]])],
91        [eval "$gl_fnmatch_cache_var=yes"],
92        [eval "$gl_fnmatch_cache_var=no"],
93        [eval "$gl_fnmatch_cache_var=\"guessing no\""])
94     ])
95   eval "gl_fnmatch_result=\"\$$gl_fnmatch_cache_var\""
96   if test "$gl_fnmatch_result" = yes; then
97     dnl Not strictly necessary. Only to avoid spurious leftover files if people
98     dnl don't do "make distclean".
99     rm -f "$gl_source_base/fnmatch.h"
100   else
101     FNMATCH_H=fnmatch.h
102     AC_LIBOBJ([fnmatch])
103     dnl We must choose a different name for our function, since on ELF systems
104     dnl a broken fnmatch() in libc.so would override our fnmatch() if it is
105     dnl compiled into a shared library.
106     AC_DEFINE_UNQUOTED([fnmatch], [${gl_fnmatch_required_lowercase}_fnmatch],
107       [Define to a replacement function name for fnmatch().])
108     dnl Prerequisites of lib/fnmatch.c.
109     AC_REQUIRE([AC_TYPE_MBSTATE_T])
110     AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
111     AC_CHECK_FUNCS_ONCE([btowc isblank iswctype mbsrtowcs mempcpy wmemchr wmemcpy wmempcpy])
112     AC_CHECK_HEADERS_ONCE([wctype.h])
113   fi
114   AC_SUBST([FNMATCH_H])
115 ])
116
117 # Request a POSIX compliant fnmatch function with GNU extensions.
118 AC_DEFUN([gl_FUNC_FNMATCH_GNU],
119 [
120   m4_divert_text([INIT_PREPARE], [gl_fnmatch_required=GNU])
121
122   AC_REQUIRE([gl_FUNC_FNMATCH_POSIX])
123 ])