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-rw-r--r--m4/memmem.m43
1 files changed, 2 insertions, 1 deletions
diff --git a/m4/memmem.m4 b/m4/memmem.m4
index f4a167b483..6dac766128 100644
--- a/m4/memmem.m4
+++ b/m4/memmem.m4
@@ -1,4 +1,4 @@
-# memmem.m4 serial 28
+# memmem.m4 serial 29
dnl Copyright (C) 2002-2004, 2007-2021 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -50,6 +50,7 @@ AC_DEFUN([gl_FUNC_MEMMEM_SIMPLE],
dnl Assume that it works on all other platforms (even if not linear).
AC_EGREP_CPP([Lucky user],
[
+#include <string.h> /* for __GNU_LIBRARY__ */
#ifdef __GNU_LIBRARY__
#include <features.h>
#if ((__GLIBC__ == 2 && ((__GLIBC_MINOR > 0 && __GLIBC_MINOR__ < 9) \