Re: Destination directory for object files

[Jeff Ward]

Thanks for quick reply.

> Hello Jeff,
>
> * Jeff Ward wrote on Tue, Mar 03, 2009 at 07:58:37PM CET:
> > I have an automake project setup but I would like the object files  
> > to be
> > placed in a specified directory.  For example:
> >
> > Foo/Foo.cpp
> > Foo/obj
> > Foo/Makefile.am
> >
> > I would like to have the Foo.o in the obj directory after compilation
> > and not in directory Foo.  Is this possible?  If so how do I go about
> > setting that up?   This would really cleanup my directory.
>
> Do not use a directory named "obj",
> <http://www.gnu.org/software/autoconf/manual/html_node/obj_002f-and-Make.html 
> >

"obj" was simply for the mock scenario really it could be called  
anything hopefully configurable.  Thanks for the heads up though.
> Get to know how VPATH builds work:
> <http://www.gnu.org/software/automake/manual/html_node/VPATH-Builds.html 
> >
> They achieve something similar to what you want and are much more
> flexible in practice.
The VPATH is definitely a nice solution for a parallel build tree.  In  
my case I was hoping for a more crude solution.  In then end what I  
was hoping for is an option that would change the rule for .cpp.o: in  
the generated makefile.

Currently it looks something like this:
.cpp.o:
    if $(CXXCOMPILE) -MT $@ -MD -MP -MF "$(DEPDIR)/$*.Tpo" -c -o $@  
$<; \ ...

What I was hoping for was an ability to make the rule look something  
like the following:
.cpp.o:
    if $(CXXCOMPILE) -MT $@ -MD -MP -MF "$(DEPDIR)/$*.Tpo" -c -o  
objects/$@ $<; \

This would cause my object files to be placed somewhere other than the  
current directory.  I know this is probably a stretch and might be  
going against the core capabilities and features of the tool.  But I  
can hope.

> Hope that helps.
>
> Cheers,
> Ralf

Thanks again,
- Jeff