1 files changed, 75 insertions, 0 deletions
diff --git a/m4/fnmatch_h.m4 b/m4/fnmatch_h.m4
new file mode 100644
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+++ b/m4/fnmatch_h.m4
@@ -0,0 +1,75 @@
+# fnmatch_h.m4 serial 4
+dnl Copyright (C) 2009-2020 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_DEFUN_ONCE([gl_FNMATCH_H],
+[
+  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
+  m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
+  AC_CHECK_HEADERS_ONCE([fnmatch.h])
+  gl_CHECK_NEXT_HEADERS([fnmatch.h])
+
+  dnl Persuade glibc <fnmatch.h> to declare FNM_CASEFOLD etc.
+  dnl This is only needed if gl_fnmatch_required = GNU. It would be possible
+  dnl to avoid this dependency for gl_FUNC_FNMATCH_POSIX by putting
+  dnl gl_FUNC_FNMATCH_GNU into a separate .m4 file.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  if test $ac_cv_header_fnmatch_h = yes; then
+    HAVE_FNMATCH_H=1
+  else
+    HAVE_FNMATCH_H=0
+  fi
+  AC_SUBST([HAVE_FNMATCH_H])
+
+  m4_ifdef([gl_POSIXCHECK],
+    [FNMATCH_H=fnmatch.h],
+    [FNMATCH_H=''
+     if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
+       dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE.
+       FNMATCH_H=fnmatch.h
+     else
+       if test $ac_cv_header_fnmatch_h != yes; then
+         dnl Provide a substitute <fnmatch.h> file.
+         FNMATCH_H=fnmatch.h
+       fi
+     fi
+    ])
+  AC_SUBST([FNMATCH_H])
+  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <fnmatch.h>
+    ]],
+    [fnmatch])
+])
+
+dnl Unconditionally enables the replacement of <fnmatch.h>.
+AC_DEFUN([gl_REPLACE_FNMATCH_H],
+[
+  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
+  FNMATCH_H='fnmatch.h'
+  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
+])
+
+AC_DEFUN([gl_FNMATCH_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+AC_DEFUN([gl_FNMATCH_H_DEFAULTS],
+[
+  GNULIB_FNMATCH=0;          AC_SUBST([GNULIB_FNMATCH])
+  dnl Assume POSIX behavior unless another module says otherwise.
+  HAVE_FNMATCH=1;            AC_SUBST([HAVE_FNMATCH])
+  REPLACE_FNMATCH=0;         AC_SUBST([REPLACE_FNMATCH])
+])