Compiler flags and memory usage
Reindl Harald
h.reindl at thelounge.net
Sun Jun 15 22:37:44 UTC 2014
Am 16.06.2014 00:12, schrieb Kevin Kofler:
> Antonio Trande wrote:
>> To pass these problems, I had to decrease '-O' optimization flag
>> gradually to '-O1' or '-O0', latest attempt is the removal of '-pipe'
>> from RPM_OPT_FLAGS.
>>
>> What's best choice in these cases?
>
> Definitely not -O0, that generates really crappy (slow and large) code. I'd
> also not recommend -O1. If you must change something, remove -pipe, that
> only makes builds slower (given sufficient RAM for the piping), but does not
> affect the quality of the generated code
i would add here
%_smp_mflags -j1
if it comes to reduce memory due compile
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