Find documentation etc. on this patch under
	http://free.acrconsulting.co.uk/
diff -Nru mess822-0.58/conf-cc mess822-0.58_cc_clean/conf-cc
--- mess822-0.58/conf-cc	1998-09-05 03:33:37.000000000 +0100
+++ mess822-0.58_cc_clean/conf-cc	2010-07-25 11:56:08.000000000 +0100
@@ -1,3 +1,3 @@
-gcc -O2
+gcc -O2 -include /usr/include/errno.h
 
 This will be used to compile .c files.
diff -Nru mess822-0.58/Makefile mess822-0.58_cc_clean/Makefile
--- mess822-0.58/Makefile	1998-09-05 03:33:37.000000000 +0100
+++ mess822-0.58_cc_clean/Makefile	2010-07-25 11:56:08.000000000 +0100
@@ -240,6 +240,10 @@
 it instcheck
 	./instcheck
 
+clean: \
+TARGETS
+	rm -f `cat TARGETS`
+
 commands.o: \
 compile commands.c commands.h substdio.h stralloc.h gen_alloc.h str.h \
 case.h