Re: [Mesa3d-dev] Re: [Xpert]mesa assuming glibc 2.2? (Cannot compile 4.1 on RedHat 6.2)

[Brian P. <br...@va...>]

"Marcelo E. Magallon" wrote:
> 
> >> "Sven M. Hallberg" <pe...@gm...> writes:
> 
>  > As far as autoconf is concerned, a simple test case will find out
>  > whether fpstate.magic is defined. The code would use an #ifdef. The
>  > usual way, really.
> 
>  Yes, the problem is doing this with Imakefiles.  You depend on whatever
>  the
> 
>  I have looked a bit more into this...
> 
>  The solution Brian is looking for looks like:
> 
> #include <signal.h>
> /* ... */
> #if defined(USE_KATMAI_ASM) && defined(X86_FXSR_MAGIC)
> /* ... */
> #endif
> 
>  this compiles the SSE support only if the glibc kernel headers are 2.4
>  headers (or patched 2.2 ones).  I don't like it, it's ugly.

I've committed this solution (basically).  I don't think it's ugly.


>  The proper solution is teaching config/imake/imake.c about
>  DefaultHasKatmaiSupport.  Include signal.h and define this as YES if
>  X86_FXSR_MAGIC is defined, and NO in other case.  Massage other files
>  to use this.  Of course this doesn't solve the case where the user
>  intentionally sets HasKatmaiSupport to YES but doesn't have the correct
>  headers.  With the imake system you can't solve that.
> 
>  This is Linux specific, I have no idea how to handle this in other X86
>  OS.  Anyone with a clue?

I think simply patching the source file with the test for X86_FXSR_MAGIC
is sufficient.

-Brian