Jan 22 2010

Display list of all predefined macros in GCC

Tag: C/C++ — Dan @ 5:17 pm

Something I always forget and have to look up.

1) Print predefined macros:

gcc -dM -E - </dev/null | sort | less

2) Print predefined macros and macros introduced by a specific header

echo “#include <stdlib.h>” > foo.h

gcc -dM -E foo.h | sort | less

Reference for -dM is in the cpp man page.