OpenMP vs. <math.h>

Dave Korn dave.korn.cygwin@googlemail.com
Tue Jan 12 21:41:00 GMT 2010


Andy Koppe wrote:
> 2010/1/12 Yaakov (Cygwin/X)
>> But thinking about this further, there's just no way that these macros would ever be safe with C++.
> 
> Yep, and the C++98 standard actually outlaws them, in §17.4.1.2 :
> 
> Names that are defined as functions in C shall be defined as functions
> in the C++ Standard Library.*
> 
>     [Footnote: This disallows the practice, allowed in C, of providing
> a "masking macro" in addition to the function prototype. The only way
> to achieve equivalent "inline" behavior in C++ is to provide a
> definition as an extern inline function. --- end foonote]

  Ah, that's clear.  So yes, we should not emit any of these macros in C++ and
Yaakov's patch is correct.  Thanks for digging that reference up.

    cheers,
      DaveK



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