On 6/12/12, Johannes Pfau <nospam at example.com> wrote: > But for simple macros, gcc -E -dM can be useful. > gcc -E -dM '/usr/include/sys/types.h' This could be useful for me, thanks. More options: http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Preprocessor-Options.html