diff -r cd82c24373cd -r b2c5a721f360 progs/README
--- a/progs/README	Tue Oct 11 14:22:37 2016 +0100
+++ b/progs/README	Tue Oct 11 15:14:59 2016 +0100
@@ -19,7 +19,11 @@
 
   emacs -nw ...file....     (is also an alias)
 
-  gcc -O file file.c
+Compiler
+
+  gcc -O0 -o file file.c
+
+Backtick is key §/±.
 
 C0.c
 ====