I want to find the C libraries\' source code to find out more about the functions used.Is GCC the only resource I can count on?I couldn\'t use the doxygen html version of th
You may need to narrow down your question a bit. The implementation varies. Not everything related to implementation details (perhaps pretty much all of it - someone with more standard knowledge can chip in) is prescribed by the C/C++ standard.
In the end you may understand how a particular library decided to do it. It's still useful knowledge, but not THE answer.