-O3 -mtune=native -march=native seems to heal problem when compiling
ohartman at zedat.fu-berlin.de
Thu Jun 2 10:16:09 UTC 2011
Earlier last month I realized that some ports crashes on FreeBSD
9.0-CURRENT/smd64 (most recent sources), when compiled with CLANG. In
particular astro/stellarium and editors/leibreoffice (3.3.2) crashed.
Those crashes where recognized on all boxes with world compiled with
CLANG and default optimizations or -O2 -march=native. All boxes in
question do have Core2Duo (Core2) CPUs .
I tried now "-O3 -march=native -mtune=native" on all those boxes while
compiling with CLANG and now the crashing software in question is now
working correct as expected. This is strange!
P.S. I have a notebook with a Core-i5 based CPU (Clarkdale). This
notebook completely fails installing FreeBSD 9.0-CURRENT/amd64
compiled with CLANG (I reported this). Compiling performed with the
given defaults. I'll try to compile the OS with -O3 also and see ...
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