How can i use gcc to produce code for 8086 cpu?

More important, how can i tell gcc not to trash my code with msvcrt crap?

You can't. GCC doesn't support segmented memory, or, by inclusion, real mode. BCC is a good C compiler for real mode. http://linux.die.net/man/1/bcc

Finish the 16-bit GCC support (project abandoned unfinished years ago).

Or use WATCOM



1. M$WCRT.DLL doesn't run on 8086 anyway AFAIK.
2. It's not GCC's fault, it's MinGW AFAIK.
3. Use some C lib (see CC386 or WATCOM compilers).
4. Go to MinGW maintainers and present this problem there

about trashing, -nostdlib fixed problem. But gcc cant make real mode code.
bye gcc.

Did you expect a Window's compiler not to link to a Window's library?

If you want a cross compiler(for any architecture), you need to build it.