[project @ 2001-12-18 13:03:12 by simonmar]

Nuke -O2-for-C, since it can cause gcc to generate incorrect code, and
doesn't seem to help much.  Add a comment about this in the 5.02
release notes, saying you can still use -optc-O2 if you really want
to.

(merged from rev. 1.47.2.3)