• https://www.rapidtables.com/code/linux/gcc/gcc-l.html
• https://blog.jessfraz.com/post/top-10-favorite-ldflags/
• https://solarianprogrammer.com/2017/05/04/building-gcc-wsl-windows-subsystem-linux/
• https://kristerw.blogspot.com/2017/09/useful-gcc-warning-options-not-enabled.html
• http://www.productive-cpp.com/hardening-cpp-programs-stack-protector/
• https://developers.redhat.com/blog/2018/03/21/compiler-and-linker-flags-gcc/, https://www.reddit.com/r/programming/comments/861ad8/recommended_compiler_and_linker_flags_for_gcc/

http://blog.httrack.com/blog/2014/03/09/what-are-your-gcc-flags/, https://news.ycombinator.com/item?id=7371806

dump all defines:
gcc -dM -E - < /dev/null

dump config (including build-in include paths):
gcc -E -x c++ - -v < /dev/null

static linking: http://stackoverflow.com/questions/4156055/gcc-static-linking-only-some-libraries/17712841#17712841