Re: 1.8.5p1 build failure on Solaris 10

[e-mail] wrote:
> "Daniel Berger" <[e-mail]> wrote on 29.06.2006 22:57:10:
> 
>> [e-mail] wrote:
>>> -solaris*2.10)  ac_cv_func_isinf=yes
>>> +solaris*2.10)  if test -z "$GCC"; then
>>> +                      ac_cv_func_isinf=yes
>>> +              fi
>>>                 LIBS="-lm $LIBS"
>>>                ;;
>>>  *) LIBS="-lm $LIBS";;
>>>
>>>
>> Actually, shouldn't we test for the feature instead of the platform? I 
> don't 
>> remember if older versions of Solaris have this.
>>
>> So, AC_CHECK_LIB(sunmath, isinf) && AC_CHECK_HEADER(sunmath.h, isinf), 
> with 
>> #ifdef's in the source?
>>
> 
>   I think this would add more code to source, now we only have to touch to 
> 
>   configure.in.
> 
>  - Ville
>  
> 

I don't totally understand how the build process works, which is part of my 
problem.  For example, I see a missing.h, and I can see AC_REPLACE_FUNCS in the 
configure.in file, but I'm not sure if/how they're tied together.  Within 
missing.h I see this:

#ifndef HAVE_ISINF
# if defined(HAVE_FINITE) && defined(HAVE_ISNAN)
# define isinf(x) (!finite(x) && !isnan(x))
# else
extern int isinf _((double));
# endif
#endif

So, in simple terms I think the logic should be:

a) On the Solaris platform...

b) If a) is true and the sunmath lib is present, and it contains the isinf 
function, then link against it.

c) If both a) and b) are true and the sunmath.h header file is present, and it 
contains the isinf function, then include it.

d) If a) or b) fail then resort to the implementation in missing.h.  This 
wouldn't require adding more source code from what I can gather, though I'm not 
positive.

Does that seem reasonable?  I would try to implement this myself, but I'm not 
sure how.

Regards,

Dan


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