sudar/Arduino-Makefile — pull request #3 by WizenedEE (2012-08-27 20:12:00+00:00)
Title: Making other *FLAGS += rather than =

CPPFLAGS uses += for its options, and the other similar flags (CFLAGS, LDFLAGS, etc) should be the same.

This can be used to modify LDFLAGS to link in the floating point version of printf.