--- Makefile.old	2017-11-29 16:36:53.468179187 +0200
+++ Makefile	2017-12-07 21:41:00.092175195 +0200
@@ -24,7 +24,7 @@
 inchworm_target:
 	@echo Using $(TRINITY_COMPILER) compiler for Inchworm and Chrysalis
 	cd Inchworm && (test -e configure || autoreconf) \
-                && sh ./configure --prefix=`pwd` $(INCHWORM_CONFIGURE_FLAGS) && $(MAKE) install
+                && sh ./configure --prefix=`pwd`  CC=${PREFIX}/bin/gcc $(INCHWORM_CONFIGURE_FLAGS) CXX=${PREFIX}/bin/g++ CFLAGS="-fopenmp" CXXFLAGS="-fopenmp" && $(MAKE) install
 
 chrysalis_target:
 	cd Chrysalis && $(MAKE) UNSUPPORTED=yes $(CHRYSALIS_MAKE_FLAGS)