config test math_info has issue with INFINITY

[Ed Vogel <edward.vogel@…>]

The config test math_info contains:

#ifdef INFINITY

PRINT_EXPRESSION(INFINITY);

#endif

The test expects this program to compile/run cleanly. This may not be case. According to the standard:

INFINITY

expands to a constant expression of type float representing positive or unsigned infinity, if available; else to a positive constant of type float that overflows at translation time.192)

So...it's perfectly valid for this test to fail at compile-time.

Not sure how to easily fix this...

Thanks,

Ed

[John Maddock]

I understand that this may be a theoretical issue, but in practice, it seems to work fine. If there are particular compilers that have an issue with this, then we can add special cases for those.