[CentOS-devel] CentOS 7 (1503) i686 Beta Architecture

On 06/05/2015 05:46 AM, Vladimir Stackov wrote:
> Greetings,
> 
> currently we are maintaining own CentOS 7 i686 rebuild and I would like to
> kindly ask you to replace following macros from gcc.spec:
> 
> %if 0%{?rhel} >= 7
> %ifarch %{ix86}
>    --with-arch=x86-64 \
> %endif
> %ifarch x86_64
>    --with-arch_32=x86-64 \
> %endif
> 
> with that:
> 
> %if 0%{?rhel} >= 7
> %ifarch %{ix86}
>         --with-arch=i686 \
> %endif
> %ifarch x86_64
>         --with-arch_32=i686 \
> %endif
> 
> x86-64 causes gcc to use extended instruction set for produced code and
> it's impossible to run CentOS 7 i686 on older systems without SSE2
> instruction because of SIGILL.
> This affects Pentium 3, old VIA CPUs, old Xeons and some others.
> 
> Is that possible?



Overall, I'm hesitant here as folks (some of the epel devs as well as
others) are looking at this as a way to supplement the 32bit environment
for the base distro for building things like wine. I don't want to mix
gcc build options for things that may live in both places.



-- 
Jim Perrin
The CentOS Project | http://www.centos.org
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