#if defined _MSC_VER
// This is Microsoft 'C'

#elif defined __GNUC__
// This is GCC

#elif defined __BORLANDC__
// This is Borland C

#elif defined _CC51 
// This is the Tasking 8051 Compiler

#elif defined __C51__ 
// This is the Keil C51 Compiler 

#else
#error Unsupported Compiler!
#endif