1# fnmatch_h.m4 serial 4
2dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9AC_DEFUN_ONCE([gl_FNMATCH_H],
10[
11  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
12  m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
13  AC_CHECK_HEADERS_ONCE([fnmatch.h])
14  gl_CHECK_NEXT_HEADERS([fnmatch.h])
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  if test $ac_cv_header_fnmatch_h = yes; then
23    HAVE_FNMATCH_H=1
24  else
25    HAVE_FNMATCH_H=0
26  fi
27  AC_SUBST([HAVE_FNMATCH_H])
28
29  m4_ifdef([gl_POSIXCHECK],
30    [FNMATCH_H=fnmatch.h],
31    [FNMATCH_H=''
32     if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
33       dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE.
34       FNMATCH_H=fnmatch.h
35     else
36       if test $ac_cv_header_fnmatch_h != yes; then
37         dnl Provide a substitute <fnmatch.h> file.
38         FNMATCH_H=fnmatch.h
39       fi
40     fi
41    ])
42  AC_SUBST([FNMATCH_H])
43  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
44
45  dnl Check for declarations of anything we want to poison if the
46  dnl corresponding gnulib module is not in use.
47  gl_WARN_ON_USE_PREPARE([[#include <fnmatch.h>
48    ]],
49    [fnmatch])
50])
51
52dnl Unconditionally enables the replacement of <fnmatch.h>.
53AC_DEFUN([gl_REPLACE_FNMATCH_H],
54[
55  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
56  FNMATCH_H='fnmatch.h'
57  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
58])
59
60AC_DEFUN([gl_FNMATCH_MODULE_INDICATOR],
61[
62  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
63  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
64  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
65  dnl Define it also as a C macro, for the benefit of the unit tests.
66  gl_MODULE_INDICATOR_FOR_TESTS([$1])
67])
68
69AC_DEFUN([gl_FNMATCH_H_DEFAULTS],
70[
71  GNULIB_FNMATCH=0;          AC_SUBST([GNULIB_FNMATCH])
72  dnl Assume POSIX behavior unless another module says otherwise.
73  HAVE_FNMATCH=1;            AC_SUBST([HAVE_FNMATCH])
74  REPLACE_FNMATCH=0;         AC_SUBST([REPLACE_FNMATCH])
75])
76