Hello All!

most compiler (if not all) have an internal ID number  which can be used
either to display the compiler characteristics or to maintain multiple
source.
for example

 printf("Compiled on "__DATE__" {at} " __TIME__".");
#if defined(__ZTC__)
  printf(" with Zortech C++ ver. %x.%xr%x\n",
            __ZTC__ >> 8, (__ZTC__ >> 4) & 0xf, __ZTC__ & 0xf);
#elif defined(__POWERC)
      printf (" with MIX Power C ver. %d.%d
\n",(__POWERC/100),(__POWERC%100));
#endif

My question is: what are the internal codes for GNU C, dos and os/2 versions ?

                             -= Francois =-
                             Thunus{at}innet.lu
                     http://www.innet.net/~pub00071
"Yes, Life, the Universe, and Everything ... there is an answer. But,
I'll have to think about it." -- Deep Thought

--- GoldED 2.50+