dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Fri, Oct 13, 2006 at 09:38:46PM +0200, Garth N. Wells wrote:
> Anders Logg wrote:
> > On Fri, Oct 13, 2006 at 09:05:47PM +0200, Garth N. Wells wrote:
> >> Anders Logg wrote:
> >>> No particular reason. There are two other options:
> >>>
> >>>   1. Don't specify CXX explicitly in the Makefile so it defaults
> >>>      to the standard compiler
> >>>
> >> We should be able to choose the compiler. There are a bunch of reasons
> >> why one might want something other than the default compiler.
> > 
> > Yes, but then one may just add a line "CXX = my_special_compiler"
> >
> 
> The flags returned by "pkg-config dolfin --cflags" are generally
> compiler-dependent, so it's necessary to know the compiler which the
> flags are for.

ok, so then we would need to add a flag to dolfin.pc that outputs the
compiler used to compile DOLFIN. It seems this is necessary.
Otherwise, the compilation of the demos may fail even if someone has
previously compiled the library (after specifying a certain compiler).

I'll add --variable=compiler to dolfin.pc.

/Anders

> >>>   2. Add a flag --variable=compiler to dolfin.pc and use the compiler
> >>>      that was used to compile DOLFIN
> >>>
> >> Seems ok to me.
> > 
> > Doesn't it look a little strange?
> > 
> >>> Any suggestions?
> >>>
> >>> What about the linker? Do we need libtool? Or can we just use CXX for
> >>> that as well?
> >>>
> >> Looks like libtool is no longer required because the location of the
> >> libraries has been added to LD_LIBRARY_PATH, so I guess we can get rid
> >> of it.
> > 
> > Good.
> > 
> > I would suggest we just remove CXX and LINKER from the Makefile.
> > 
> > Here's how the simplest Makefile would look:
> > 
> >   CFLAGS  = `pkg-config dolfin --cflags`
> >   LIBS    = `pkg-config dolfin --libs`
> > 
> >   DEST    = dolfin-poisson
> >   OBJECTS = main.o
> > 
> >   all: $(DEST)
> > 
> >   clean:
> >           -rm -f *.o core *.core $(OBJECTS) $(DEST)
> > 
> >   $(DEST): $(OBJECTS)
> >             $(CXX) -o $@ $(OBJECTS) $(CFLAGS) $(LIBS)
> > 
> >   .cpp.o:
> >           $(CXX) $(CFLAGS) -c $<
> > 
> > Could this be simplified further or this the simplest possible
> > Makefile?
> > 
> 
> As Makefiles go, this looks to me about as simple as they get.
> 
> Garth
> 
> 
> > /Anders
> > 
> > 
> >> Garth
> >>
> 
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