Marco Zanon <info@xxxxxxxxxxxxxx> writes: > Would it be possible to port GCC to a non-POSIX operating system and > make it work? Sure. For example, gcc runs on MS-DOS. > Or: Suppose I created an operating system kernel. What would I have to > implement in order for gcc to run on top of it? Would a POSIX-compliant > libc be necessary? gcc is a complicated program, but in operating systems terms it is pretty close to being a filter which reads one file and writes another. It does not require much in the way of operating system support. It does need most of the ISO C library (fopen, printf, malloc, etc.). It also needs to be able to start another process, and it needs to be able to read a directory. There may be a couple of other things here and there. Ian
