Bug 179218 – sys-devel/gcc-4.2.0 does not work on ppc64

• Product: Gentoo Linux
• Status: VERIFIED WONTFIX

[Description Markus Rothe (RETIRED) 2007-05-20 13:20:01 UTC]

I tried to use gcc 4.2.0 in a chroot. Although it doesn't work too good.

First I used an existing chroot and updated from 4.1.1-r3 to 4.2. After compiling this and that paludis (one of the compiled packages) didn't work anymore. It only produced segmentation faults from then on.

As I was not able to recompile paludis without a working paludis I started from scratch.

I unpacked a stage1, unmasked gcc 4.2.0 and ran bootstrap.sh. Now I got a segfault while compiling glibc.

What's this bug about? Please don't add ~ppc64 to gcc 4.2.0 unless those problems are sorted out.

[Comment 1 Markus Rothe (RETIRED) 2007-05-20 13:24:55 UTC]

Created attachment 119787 [details]
log for glibc merge (incl. segfault)

[Comment 2 SpanKY 2007-05-20 16:52:28 UTC]

ive been using gcc-4.2.0 on my quad without troubles, but that only extends so far to ppc64 ... and we've shown in the past that ppc64 tends to be much more unstable than ppc in the toolchain ...

[Comment 3 Markus Rothe (RETIRED) 2007-05-20 19:02:33 UTC]

ok. so let's find out the differences between your and mine config. could you please send me your 'emerge --info' output?

[Comment 4 SpanKY 2007-05-20 23:08:50 UTC]

when i said "ppc" i meant "ppc" :)

i havent tried ppc64, just ppc32

[Comment 5 Markus Rothe (RETIRED) 2007-05-21 05:31:13 UTC]

(In reply to comment #4)
> when i said "ppc" i meant "ppc" :)
> 
> i havent tried ppc64, just ppc32
> 

Sorry, I think I don't understand that "ive been using gcc-4.2.0 on my quad without troubles, but that only extends so far to ppc64" then :-/

/me catches a dictionary..

[Comment 6 Brent Baude (RETIRED) 2007-05-21 13:52:01 UTC]

I think he means he's using a 32bit userland corsair...

[Comment 7 Markus Rothe (RETIRED) 2007-05-21 19:19:19 UTC]

ahh.. stupid /me. I didn't thought about that possibility. thanks..

[Comment 8 SpanKY 2007-05-21 19:43:46 UTC]

yeah, the ppc64 userland is just too unstable for me to use as a desktop, so i have a 64bit kernel with a 32bit userland ... i need KDE/firefox actually functioning :)

sorry about that

[Comment 9 Brent Baude (RETIRED) 2007-05-21 20:36:52 UTC]

fwiw, firefox and thunderbird work quite nicely on ppc64 64ul now thanks to some patches from the moz Gentoo team.  Sorry to derail the point of this bug...

[Comment 10 SpanKY 2007-05-21 20:45:10 UTC]

unless anyone has crazy ideas as to the source of the troubles, i think the way to tackle this would be to take a stage3/gcc-4.1.2 system and install gcc-4.2.0 in parallel ...

then locate the simplest C-only package you can find and get it to bomb only when compiled with gcc-4.2 ...

[Comment 11 Bugs Bunny 2007-05-28 13:58:06 UTC]

Check for out of memory issues, There is a major regression on 64bit systems as far as gcc is concerned. More detail can be found here :

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30052

It does include a patch but needs to be updated in two locations to fix the ice it introduces on fortran.

[Comment 12 Tom Gall (RETIRED) 2007-10-14 06:18:38 UTC]

going to close this bug ...  gcc 4.2.2 seems to be dramatically improved ... still under test .. but it's not dead yet. 4.2.0 has no chance of going stable and we ain't fixing it.

[Comment 13 Tom Gall (RETIRED) 2007-10-18 07:27:35 UTC]

as this bug was referenced by external parties I will document this here.

http://sourceware.org/ml/libc-alpha/2006-05/msg00017.html fixes this issue for gcc 4.2.x

[Comment 14 Markus Rothe (RETIRED) 2007-10-25 14:48:07 UTC]

added ~ppc64 to gcc-4.2.2