Update NUCCOR Makefile to improve scriptability for automation

Author: tamara-laranga

Fortran/NUCCOR/Makefile

@@ -1,16 +1,17 @@
-FC = gfortran -O3 -fopenmp
+FC ?= gfortran
+FLAGS ?= -O3 -fopenmp
 objects = mtc_patch.o mtc.o mtc_openmp.o mtc_main.o
 
 INCLUDE=
 
 all: ${objects}
-	${FC} -o mtc.x ${objects}
+	${FC} ${FLAGS} -o mtc.x ${objects}
 
 %.o: %.f90
-	${FC} -c $< ${INCLUDE}
+	${FC} ${FLAGS} -c $< ${INCLUDE}
 
 %.o: %.F90
-	${FC} -c $< ${INCLUDE}
+	${FC} ${FLAGS} -c $< ${INCLUDE}
 
 .PHONY. : clean
 clean: