GCC 4.3.2 in AIX 5.3

[Vardhan, Sundara (GE Infra, Energy)]

Hi All

Found that when compiling GCC-4.3.2 on AIX 5.3 using either xlc or an
existing gcc, it is required to set CFLAGS and CXXFLAGS to -U__MATH__.
This is required for the various math functions defined in AIX clashes
with those that are being defined in GCC. This is not just true for gcc,
I had to include this flag in my application compilation too when using
xlc to avoid math subroutine redefinition errros. Just wanted to share
this.

With Regards

Vardhan