The old system of just defining macros available in some other platform
was susceptible to silently using the wrong code if you forgot to
include a particular header. This fixes a crash on non-Windows platforms
introduced by e1fbac3c.

This was RE'd from the errdisp applet.

the helper macro for padding to common_funcs.h

Involves making asserts use printf instead of the log functions (log functions are asynchronous and, as such, the log won't be printed in time)
As such, the log type argument was removed (printf obviously can't use it, and it's made obsolete by the file and line printing)

Also removed some GEKKO cruft.

Also replaced C headers with the C++ equivalent ones

fix for issue Linux build #9, not sure why this is broken but its unused code I'm just getting rid of it