--- native/Makefile.orig	Mon Mar  6 21:59:50 2017
+++ native/Makefile	Mon Mar  6 22:00:22 2017
@@ -81,7 +81,7 @@ LIBPFX=lib
 LIBSFX=.so
 ARSFX=.a
 JNISFX=$(LIBSFX)
-CC=gcc
+CC?=gcc
 LD=$(CC)
 LIBS=
 # CC_OPTS only applied to objects build for jnidispatch, not for libffi
@@ -95,7 +95,7 @@ LIBS=
 #                   variables is ignored.
 LOC_CC_OPTS=-Wno-unknown-warning-option -Werror -Wno-clobbered
 # Default to Sun recommendations for JNI compilation
-COPT=-O2 -fno-omit-frame-pointer -fno-strict-aliasing
+COPT=${PORTS_CFLAGS} -fno-omit-frame-pointer -fno-strict-aliasing
 CASM=-S
 ifeq ($(DEBUG),true)
 CDEBUG=-g