[Xorg-driver-geode] proposal: always build with -march=geode

Gaetan Nadon memsize at videotron.ca
Tue Jun 22 14:04:59 PDT 2010

On Tue, 2010-06-22 at 23:41 +0300, Martin-Éric Racine wrote:

> On Tue, Jun 22, 2010 at 11:27 PM, Gaetan Nadon <memsize at videotron.ca> wrote:
> > On Tue, 2010-06-22 at 22:12 +0300, Martin-Éric Racine wrote:
> >
> > In addition to exiting gracefully with a warning at ./configure time
> > if the build host is non-x86, what if we enforced -march=geode if GCC
> >
> > You may want to look at AX_GCC_X86_CPUID and AX_GCC_ARCHFLAG which would do
> > that for you.
> > http://www.gnu.org/software/autoconf-archive/The-Macros.html#The-Macros
> Unless I misunderstood the description, these macros guess the target
> based on the build host's architecture?

They use host_cpu (e.g. i*86) first and then look at the cpuid. You
might have cross-compiling in mind. 
Generally speaking, there is not much one can do in configure.ac for

> Martin-Éric
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