Non-sucking Win32 C compiler

I need a small (not bloated to hell, clean, not system ruining / service installing) compiler for tiny C programs with POSIX-like semantics (i.e. C library that doesn't suck and stuff like read() instead of ReadFileWEX(WHANDLE, WSHARINGMODE, WSECURITYCONTEXT, NULL, NULL, NULL, NULL) - true POSIX stuff like fork() et al is not needed).

Visual Studio or cygwin are out of the question. Some GCC distro like mingw might be OK depending on how much the installation sucks (ideally there wouldn't be any installation at all).

Any ideas or do I give up to ENTERPRISE-quality software?

>>35
NOTE: TCC is still somewhat experimental and is not recommended for production use.  The code it generates is much less optimized than what GCC produces, and compiler bugs can have serious security consequences for your program.
It's useful if compiler size is and sometimes -O0 compiler speed is what you're after, but how often is that?