Adding includes path to Makefile

[jsaksris]

How can I add include path to Makefile?
The file is in Project/src/core
And I have tried added the following to Makefile

SOURCE_DIRS = lib_logging/api \
src/core/* \
src/extensions/*

INCLUDE_DIRS = lib_logging/api/debug_print.h \
src/core/* \
src/extensions/*