* Reinoud Koornstra: > One more question, for FORTIFY_SOURCE=2, can I use either -O1 or -O2 > optimization flags? I noticed it doesn't like -Os. Thanks, Historically, I think the expectation was that 1 should be used with -O1 and 2 with -O2. But I think the required passes run at -O1 as well. Thanks, Florian