From: Michael R. Crusoe <crusoe@debian.org>
Subject: Use CPPFLAGS, CFLAGS, and LDFLAGS
Forwarded: https://github.com/biocore/unifrac-binaries/pull/46

--- a/test/Makefile
+++ b/test/Makefile
@@ -1,8 +1,5 @@
 .PHONY: test_binaries test
 
-CFLAGS := 
-LDFLAGS :=
-
 ifeq ($(PREFIX),)
 	PREFIX := $(CONDA_PREFIX)
 endif
