tech-pkg: best way to add -O if no optimization is already defined?

Subject: best way to add -O if no optimization is already defined?
To: None <tech-pkg@netbsd.org>
From: Jeremy C. Reed <reed@reedmedia.net>
List: tech-pkg
Date: 02/09/2005 20:00:17

What is the correct nbmake or pkgsrc way to add -O to CFLAGS only if no
optimization (like -O2) is not defined?

I guess CCOPTS, CPPFLAGS and CFLAGS would need to be checked and then if
not set then add -O to CFLAGS.

(I need this for libdv which requires at least -O. No problem on NetBSD
because of /usr/share/mk/sys.mk.)

 Jeremy C. Reed

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