An autoconf macro for its associated module.

[gnulib.git] / m4 / memrchr.m4

diff --git a/m4/memrchr.m4 b/m4/memrchr.m4
new file mode 100644 (file)
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+++ b/m4/memrchr.m4
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+# memrchr.m4 serial 1
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+AC_DEFUN([gl_FUNC_MEMRCHR],
+[
+  dnl Persuade glibc <string.h> to declare memrchr().
+  AC_REQUIRE([AC_GNU_SOURCE])
+
+  AC_REPLACE_FUNCS(memrchr)
+  if test $ac_cv_func_memrchr = no; then
+    gl_PREREQ_MEMRCHR
+  fi
+])
+
+# Prerequisites of lib/memrchr.c.
+AC_DEFUN([gl_PREREQ_MEMRCHR], [
+  AC_CHECK_HEADERS_ONCE(limits.h)
+])