Ignacio Fernández Galván wrote: > a.mod a.o: a.f90 b.mod > gfortran -c $< > > b.mod b.o: b.f90 > gfortran -c $<
The reason that this misbehaves is that it violates rule number 2: <http://make.paulandlesley.org/rules.html>. Specifically, what you are telling make with the above is: "to update a.mod, run gfortran -c a.f90". But that command does not necessarily update a.mod, so it's a lie, and make gets confused. Did you not see FX's reply on the fortran list? <http://gcc.gnu.org/ml/fortran/2007-11/msg00013.html> His solution is cleaner, since it effectively communicates to make that a.mod depends on a.f90 and a.o, but without implying that the module can be rebuilt by calling gfortran -c a.f90. I think the @true part is even extraneous if it looks too ugly. Brian _______________________________________________ Help-make mailing list Help-make@gnu.org http://lists.gnu.org/mailman/listinfo/help-make