ffs: fix m4 prerequisite

[gnulib.git] / m4 / ffs.m4

diff --git a/m4/ffs.m4 b/m4/ffs.m4
index 2a35078..12df085 100644 (file)
--- a/m4/ffs.m4
+++ b/m4/ffs.m4
@@ -1,4 +1,4 @@
-# ffs.m4 serial 1
+# ffs.m4 serial 2
 dnl Copyright (C) 2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -6,6 +6,7 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_FUNC_FFS],
 [
+  AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS])
   AC_CHECK_FUNCS_ONCE([ffs])
   if test $ac_cv_func_ffs = no; then
     HAVE_FFS=0