Update Makefile_MT
AR ?= ar
-FC = $(FORTRAN_COMPILER)
+FC ?= gfortran
+CC ?= gcc
CFLAGS += -Wall -O3 -fopenmp -I $(SPOOLES_INCLUDE_DIR) -DARCH="Linux" -DSPOOLES -DARPACK -DMATRIXSTORAGE -DUSE_MT=1
FFLAGS += -Wall -O3 -fopenmp
