Counting functions in C source code

Question

I have complete project in C, which can be built with gcc or Visual Studio. There are no calls to external libraries.

I would like to know how many functions there

Answer 1

With gcc:

$ nm elf_file | grep "T " | grep -v " _" | wc -l

Note that gcc can inline some functions even with optimizations disabled, so you should compile with:

-O0 -fno-builtin -fno-inline-functions-called-once

(-finline-functions-called-once is enabled by default even in -O0)