--- gcc/config/i386/xm-dos.h	2018/04/24 18:23:23	1.1.1.2
+++ gcc/config/i386/xm-dos.h	2018/04/24 18:31:07	1.1.1.3
@@ -15,3 +15,6 @@
 #define MKTEMP_EACH_FILE 1
 
 #define NO_PRECOMPILES 1
+
+/* sys_errlist proto in cccp.c doesn't match djgpp */
+#define HAVE_STRERROR