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

[Marcelo E. M. <mar...@bi...>]

>> "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.

 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?

-- 
Marcelo