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 :/

On Mon, Feb 6, 2012 at 6:06 PM, Grant <emailgrant@gmail.com> wrote:

> > 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.
> >>
> >> Regards,
> >> Florian Philipp
>
>