I recently compiled a small executable program writtern in C with the Visual Studio C++ Express. The output was a 56K executable, which ok is pretty small, but actually in terms of programs its really large.
So I looked into compiling my program with the TinyCC compiler.
First I downloaded the compiler, however it quickly came apparent that the libraries and includes that come with the compiler were just a minimal set. What I needed was the includes from MinGW. Its only necceccery to download the Windows 32 API package.
My program needed to be linked with winsock2 so first i needed to run
This will generate a ws2_32.def file. I was then able to simply compile the program with.
tcc program.c ws2_32.def
The output of which is an executable of 1K. I asume because the compiler itself is small, and the compiler compiles itself that it would produce rather small executables. I have yet to test compiling the same program using mingw and GCC -Os.