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Tatsh
Apprentice
Joined: 22 Jul 2007
Posts: 187
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 Posted: Sat Jan 14, 2012 11:16 am Post subject: AMD Bulldozer CPU (8-Core); can't build icu, glibc, gcc |
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I get either segfaults or illegal instruction during building. For GCC 4.6, can't even get the past configuration because linking with mpfr fails (and no I cannot build mpfr either).
I was just able to compile big things like Chromium, LibreOffice, parts of KDE with:
| Code: | | CFLAGS="-O2 -pipe -march=amdfam10 -mtune=amdfam10 -mcx16 -msahf -maes -mpclmul -mpopcnt -mabm -mlwp -mavx" |
But I decided I wanted to have my system fully on a specific GCC version, namely 4.6 because that actually has support for Bulldozer (-march=bdver1).
Is my only hope to reinstall everything?  |
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your_WooDness
Tux's lil' helper
Joined: 25 Oct 2007
Posts: 77
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| Posted: Sat Jan 14, 2012 2:59 pm Post subject: |
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Hej,
you should update to the latest GCC compiler to include BMI and TBM ( -mbmi / -mtbm ). At the office we played a bit with the -mbmi GCC option with a GCC 4.6.2 and had a real performance boost with benchmarks and this flag. Not sure if the -mtbm also boosts performance, need more time for playing...
WooD |
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Tatsh
Apprentice
Joined: 22 Jul 2007
Posts: 187
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| Posted: Sun Jan 15, 2012 1:43 am Post subject: |
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| your_WooDness wrote: | Hej,
you should update to the latest GCC compiler to include BMI and TBM ( -mbmi / -mtbm ). At the office we played a bit with the -mbmi GCC option with a GCC 4.6.2 and had a real performance boost with benchmarks and this flag. Not sure if the -mtbm also boosts performance, need more time for playing...
WooD |
That really doesn't work. I tried htop and curl and both compile but start and quit with 'Illegal instruction.'
These are my CFLAGS (on GCC 4.6.2):
| Code: | | CFLAGS="-O2 -pipe -fomit-frame-pointer -march=bdver1 -mtune=bdver1 -mcx16 -msahf -mpclmul -mabm -mlwp -mavx" |
I ended up reinstalling everything (but actually I may have only had to turn the memory speed back to 1333; this what was causing major problems during compilation). I guess the AMD Phenom II X4 and the Bulldozer are just too different to 'just work' (although 99% of things work; it's the 1% that's the problem). |
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nlsa8z6zoz7lyih3ap
Guru
Joined: 25 Sep 2007
Posts: 388
Location: Canada
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Portage & Programming
