isnan() and isinf() checks

[Hasso Tepper]

Alexander Neundorf wrote:
> Using "-lm" is no good idea, as Christian already stated.

Mkay. Better now?
 
> Please take a look at kdelibs/cmake/modules/MacroPushRequiredVars.cmake, it 
> offers two macros:
> 
> # Usage:
> # MACRO_PUSH_REQUIRED_VARS()
> # SET(CMAKE_REQUIRED_DEFINITIONS
>       ${CMAKE_REQUIRED_DEFINITIONS} -DSOME_MORE_DEF)
> # CHECK_FUNCTION_EXISTS(...)
> # MACRO_POP_REQUIRED_VARS()

Thanks for info.

> Can you please check whether check_symbol_exists() (from  
> Modules/CheckSymbolExists.cmake) does what you need instead of using 
> check_c_source_compiles() directly ?

Indeed. I didn't realise that it does work for macros as well. Updated
patch is attached.


regards,

-- 
Hasso Tepper
KDE Estonian Team
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