Imported Upstream version 1.4

[debian/gzip] / m4 / memrchr.m4

diff --git a/m4/memrchr.m4 b/m4/memrchr.m4
new file mode 100644 (file)
index 0000000..57ed978
--- /dev/null
+++ b/m4/memrchr.m4
@@ -0,0 +1,26 @@
+# memrchr.m4 serial 9
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2010 Free Software Foundation,
+dnl 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.
+
+AC_DEFUN([gl_FUNC_MEMRCHR],
+[
+  dnl Persuade glibc <string.h> to declare memrchr().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([memrchr])
+  if test $ac_cv_have_decl_memrchr = no; then
+    HAVE_DECL_MEMRCHR=0
+  fi
+
+  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], [:])