--- gcc-10.4.0.old/gcc/config/host-linux.cc
+++ gcc-10.4.0/gcc/config/host-linux.cc
@@ -23,6 +23,9 @@
 #include "hosthooks.h"
 #include "hosthooks-def.h"
 
+#ifndef SSIZE_MAX
+#define SSIZE_MAX INTTYPE_MAXIMUM(ssize_t)
+#endif
 
 /* Linux has a feature called exec-shield-randomize that perturbs the
    address of non-fixed mapped segments by a (relatively) small amount.