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Bug#: 196245
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Status: RESOLVED
Resolution: FIXED
Assigned To: Gentoo Toolchain Maintainers <toolchain@gentoo.org>
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Reporter: Tom Gall <tgall@gentoo.org>
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Description:   Opened: 2007-10-18 07:20 0000 
gcc 4.2.x is a bit more agressive on inlining and as a result breaks the glibc
build. The manifestation is when glibc tries to run rpcgen which is the first
binary that is run as the build is progressing. 

The fix is not a gcc fix but a glibc fix. It makes sure call_gmon_start is not
inlined. (It isn't inlined with 4.1.x so the past behavior here isn't being
changed with the fix.

Supposedly this hits all architectures but I only have validated this on ppc64

Reproducible: Always

------- Comment #1 From Tom Gall 2007-10-18 07:23:31 0000 ------- 
The patch from the following post I have validated does fix the problem.

http://sourceware.org/ml/libc-alpha/2006-05/msg00017.html

------- Comment #2 From Tom Gall 2007-10-18 07:26:08 0000 ------- 
I do believe with this fix that gcc 4.2.2 could be viable for 2007.1. (least on
ppc64) :-)

------- Comment #3 From SpanKY 2007-10-18 07:59:17 0000 ------- 
less common arches are certainly free to stabilize gcc-4.2.x, but i dont plan
on recommending stabilizing <=4.2.2 for any architecture ...

------- Comment #4 From Tom Gall 2007-10-18 18:16:44 0000 ------- 
Understood. We haven't decided if we're going to 4.2.2 or not yet. That'll be a
team discussion.

On our part we have motivations for power6.

Is the toolchain team ok with pulling in this patch to glibc then ?

------- Comment #5 From SpanKY 2007-10-19 06:38:45 0000 ------- 
yeah, patch looks fine ... i'll queue it up

------- Comment #6 From SpanKY 2007-10-24 06:10:57 0000 ------- 
added to glibc-2.7
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