FreeBSD 6

Kövesdán Gábor gabor.kovesdan at t-hosting.hu
Wed Jul 27 17:07:53 GMT 2005


Nikolas Britton wrote:

>On 7/27/05, Kövesdán Gábor <gabor.kovesdan at t-hosting.hu> wrote:
>  
>
>>Nikolas Britton wrote:
>>
>>    
>>
>>>On 7/26/05, Kövesdán Gábor <gabor.kovesdan at t-hosting.hu> wrote:
>>>
>>>
>>>      
>>>
>>>>Nikolas Britton wrote:
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>>>Is it just me or is -O2 now the default for kernel builds? What about
>>>>>-Os, safe to use?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>So is it for me. But if I specify some CFLAGS, for example -O3
>>>>-march=athlon64, the
>>>>building fails, but CFLAGS mustn't affect the kernel compiling process
>>>>afaik. There is
>>>>COPTFLAGS for that reason. I've also made a PR about this new, unwanted
>>>>behaviour,
>>>>but haven't got any answers so yet.
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>You are right, COPTCLAGS is for the kernel only. -O3 is not officially
>>>supported for CFLAGS or COPTFLAGS. If you use -O3 for CFLAGS it will
>>>break some ports. Also from my experience using anything higher then
>>>CPUTYPE=p2 will break ports (like gstreamer).
>>>
>>>This is what I normally add to my make.conf file:
>>>CPUTYPE=p2
>>>CFLAGS= -Os -pipes
>>>COPTFLAGS= -Os -pipes
>>>#CXXFLAGS= don't remember what I set this too, don't use it a lot.
>>>
>>>If I want a port to build with different settings I just tell it to
>>>inline... make CPUTYPE=p4 install clean etc.
>>>
>>>
>>>
>>>      
>>>
>>Yes, I know -O3 isn't supported for either, but I didn't mean ports. The
>>kernel building
>>fails with this:
>>CFLAGS=-O3 -march=athlon64
>>#COPTFLAGS=-O3 -march=athlon64   <-This is commenred out!
>>And this breaks the kernel compiling. See this:
>>
>>http://www.freebsd.org/cgi/query-pr.cgi?pr=83995
>>    
>>
>
>Isn't their a way to overide any setting in make.conf by putting it (
>-O flags ) inside the kernel config file, I seem to remember doing
>something like that in the passed. Or you could do it all inline again
>like: nice -20 make -j2 CYPUTYPE=p4 "CFLAGS= -Os -pipe"
>KERNCONF=ME_COLONEL buildkernel
>  
>
IIRC, the makeoptions option is to do this in the kernel config file.
E.g. makeoptions   MODULES_OVERRIDE="" to skip modules building.


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