[OE-core] [PATCH V3 0/2]fix native package compile error with gcc 4.3.4 on x86 host

[Hongxu Jia]

On 03/01/2013 07:57 AM, Richard Purdie wrote:
> On Thu, 2013-02-28 at 07:49 -0800, Khem Raj wrote:
>> On Thu, Feb 28, 2013 at 3:06 AM, Burton, Ross <ross.burton at intel.com> wrote:
>>> On 28 February 2013 07:09, Hongxu Jia <hongxu.jia at windriver.com> wrote:
>>>> Change from V2: as Khem Raj suggested, use `-march=native' to cause the
>>>> compiler to auto-detect the architecture of the build computer, if the
>>>> auto-detect is unsuccessful the option has no effect.
>>> What happens if you're in an environment where you're sharing sstate
>>> between multiple developers, and the build machine is an i7 but
>>> another developer's machine is a Core2?    These machines have
>>> different sets of extensions available
>> yes I thought about it later on. adding march=i686 when host is 32bit
>> and march=x86-64 which build host is 64bit in bitbake.conf is probably
>> one way but I feel its overkill to please an old compiler and for one recipe
>> so may be you should try to deduce the version of gcc. i think best is to
>> fix the autoconf on glib-2.0 where you would add a test to find the version
>> of compiler and inject the needed option to flags
>>
>>
>>> Using the architecture as determined by bitbake seems like a better
>>> idea (which was V1, right?) as that's embedded in the sstate hash.
> How about we patch sanity.bbclass to test the gcc version and if its
> 4.3.4 and march isn't in BUILD_CFLAGS, we ask the user to add:
>
> BUILD_CFLAGS_append = " -march=native"
>
> to their local.conf, mentioning this is to fix an issue with older gccs?
Got it, I will work on it.

Thanks
Hongxu

> Cheers,
>
> Richard
>
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core at lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core