$(OBJEXT) equivalent for .lo files?

[Rhys Ulerich]

Hi all,

Explicit dependencies look like
    foo.$(OBJEXT) : $(srcdir)/foo.F90 bar.$(OBJEXT)
where $(OBJEXT) serves to insulate one from whether or not the suffix
is .o for an object file.

What's the $(OBJEXT) equivalent for a .lo file?  I'm providing
explicit dependencies for some Fortran files and need to express
things like
    foo.lo : $(srcdir)/foo.F90 bar.lo

Or, is the .lo extension guaranteed across platforms?

Thanks,
Rhys