PI in math.h

[kaliber]

Please remove following lines from math.h:

#define PI                              M_PI
#define PI2                             M_PI_2

It breaks build of some applications and it isn't POSIX ​http://opengroup.org/onlinepubs/007908775/xsh/math.h.html

[umccullough]

Ah, yes... this explains why I had problems compiling SETI@home. I worked around it differently in that case by changing their definition to PI_

I had meant to look into it myself, but got pre-occupied :)

[aljen]

yeah, while porting llvm to haiku i needed to #undef PI too :/

[axeld]

Fixed in hrev31250.