--- gnulib/lib/malloc/scratch_buffer.h	2018-08-18 01:02:45.685731224 +0100
+++ lib/malloc/scratch_buffer.h	2018-08-18 01:08:42.942494699 +0100
@@ -18,7 +18,11 @@
 
 #ifndef _SCRATCH_BUFFER_H
 #define _SCRATCH_BUFFER_H
 
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
 /* Scratch buffers with a default stack allocation and fallback to
    heap allocation.  It is expected that this function is used in this
    way: