gcc bug in fc 3

[Richard Hubbell]

I installed a plain vanilla FC3, it only has xdm and xfce, no gnome or kde.
I was unable to run neither mozilla (dies in PR_dtoa) nor firefox
(dies in JS_dtostr).

Digging and digging I found out that gcc seems to be the problem, maybe.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17560

The only part that doesn't fit is that I wasn't using any optimizations
as far as I know, unless the they occur even with --enable-debug  

I tried a Makefile patch I ran across that explicitly turns off optimizations
for prdtoa.c.  The problem shows up later during the build when PR_dtoa
gets used by shlibsign.

Anyone know what's going wrong?  Please tell me I just need to install
some package to fix this.

tia,
Richard