[GCC-XML] missing builtin for gcc4.3

[Marco Clemencic]

Hi,

I have source file that uses std::isfinite from cmath.
gccxml fails on it because __builtin_isfinite is not defined.

I fixed it locally adding the line:

#define __builtin_isfinite(x) (1)

to share/.../GCC/4.3/gccxml_builtins.h

Cheers
Marco