Re: CPPFLAGS for LIBOBJS

[Ralf Wildenhues]

* Russ Allbery wrote on Wed, Apr 23, 2008 at 10:51:11PM CEST:
> Ralf Wildenhues <address@hidden> writes:
> 
> > Yes, they don't get per-target preprocessor or compile flags.  That
> > doesn't work, because then they would have to be renamed:  $(LIBOBJS)
> > may be added to several outputs, each with different per-target flags.
> 
> This is why I want LIBOBJS_CPPFLAGS, which would globally specify the
> CPPFLAGS used for building those objects.  I don't need to build them
> multiple times with different flags.  I only need to build them once, but
> possibly with flags different than what are used by the rest of the
> project.  I think this would avoid the problems you mention above.

Yes.  This is a useful TODO item.

I think you should be able to work around it by using
AC_CONFIG_LIBOBJ_DIR and putting all LIBOJBS in a separate directory,
with separate Makefile.am, ensuring that they are built early enough,
and setting AM_CPPFLAGS and AM_CFLAGS there.  I suppose you know all
this already, but don't want to spoil your nonrecursive build.  ;-)

Cheers,
Ralf