Looks your variable MAKEOPT in make.conf. Decrease the "-jX" flag for "-j1"
can solve the problem but your problem it's still strange.
It is possible that this comes from a lack of ram.

regards,

On Wed, Feb 8, 2012 at 5:03 AM, Grant <emailgrant@gmail.com> wrote:

> > I'using CFLAGS="-march=core2 -O2 -pipe -msse4.1"
> >
> > Firefox builds with success for me. gcc is 4.5.3 for me. It's strange.
> > I had a similar problem but it had a bad kernel configuration. When I
> have
> > this problem it's gcc receive SIGSEV signal.
> > I don't think that you have the same problem like me.
> > I test in a virtual machine and firefox compile with success: CFLAGS are
> > "-march=native -pipe -O2"
> >
> > I've not really idea for your problem :/
>
> Thanks everyone for the help with this.  I was able to compile
> gcc-4.5.3-r1 and now it looks like firefox-9.0 will compile if I can
> keep it from running out of memory.  I'm going to compile without
> -pipe soon and if that doesn't work I've got more RAM on the way.
>
> - Grant
>
>
> >> > At first glance firefox uses the arithmetic pointer and
> >> > Wno-pointer-arith
> >> > lifts warnings or errors when used.
> >> > This is what gcc says : error: pointer of type 'void *' used in
> >> > arithmetic
> >> >
> >> > What it gives without this flag and Is there a particular reason for
> >> > using
> >> > this one ?
> >>
> >> I'm having trouble following.  I'm using:
> >>
> >> CFLAGS="-march=native -O2 -pipe"
> >>
> >> Should I try with different flags?
> >>
> >> - Grant
> >>
> >>
> >> >> >> Does anyone have any ideas on this?  I just completed an emerge -e
> >> >> >> world so I don't think anything needs to be re-emerged.
>  Everything
> >> >> >> compiles fine except for gcc-4.5.3-r1 (I'm on gcc-4.3.4) and
> >> >> >> firefox-9.0:
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >>
> /var/tmp/portage/www-client/firefox-9.0/work/mozilla-release/js/src/jsgcchunk.cpp:
> >> >> >> In function 'void* MapAlignedPages(size_t, size_t)':
> >> >> >>
> >> >> >>
> >> >> >>
> /var/tmp/portage/www-client/firefox-9.0/work/mozilla-release/js/src/jsgcchunk.cpp:243:
> >> >> >> error: pointer of type 'void *' used in arithmetic
> >> >> >>
> >> >> >>
> >> >> >>
> /var/tmp/portage/www-client/firefox-9.0/work/mozilla-release/js/src/jsgcchunk.cpp:243:
> >> >> >> error: pointer of type 'void *' used in arithmetic
> >> >> >
> >> >> > That looks like a change in how the compiler treats bad code, or
> the
> >> >> > introduction of bad code in an updated version of Firefox. The
> >> >> > compiler can't sanely do pointer arithmetic without knowing the
> >> >> > pointer type. Looks like the version you're compiling with throws
> an
> >> >> > error on that.
> >> >> >
> >> >> > Are using anything like -Werror and/or -Wall in your CFLAGS?
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >>
> >> >> Yes, enabling --Wno-pointer-arith should help.
>
>