If in my Makefile I have: USE_GCC= 4.7+ USE_FORTRAN= yes and then I type "make test-gcc", I get CC=gcc47 - CXX=g++47 - CPP=cpp47 - CFLAGS="-pipe -Wl,-rpath=/usr/local/lib/gcc47" F77=gfortran46 - FC=gfortran46 - FFLAGS="-pipe -Wl,-rpath=/usr/local/lib/gcc47" LDFLAGS=" -Wl,-rpath=/usr/local/lib/gcc47" Shouldn't F77 and FC be gfortran47?