Index: Makefile
--- Makefile.orig	2021-12-26 00:01:40.140165000 +0100
+++ Makefile	2021-12-26 00:01:59.935506000 +0100
@@ -19,6 +19,7 @@
 ### Shared code between Tarsnap projects.
 
 all:	toplevel
+	export CC="$${CC}}"; \
 	export CFLAGS="$${CFLAGS:-${CFLAGS_DEFAULT}}";	\
 	. ./posix-flags.sh;				\
 	. ./cpusupport-config.h;			\