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SubjectRe: Export objs from an external Makefile?
On Fri, Oct 12, 2001 at 10:14:38AM +1000, Keith Owens wrote:
> On Thu, 11 Oct 2001 16:57:34 -0700,
> Tom Rini <trini@kernel.crashing.org> wrote:
> >On Fri, Oct 12, 2001 at 09:42:05AM +1000, Keith Owens wrote:
> >> On Thu, 11 Oct 2001 09:35:32 -0700,
> >> Tom Rini <trini@kernel.crashing.org> wrote:
> >> >Hey all. How do you do the 'export-objs' bits in a kernel module that's
> >> >outside of the kernel? Thanks..
> >>
> >> Compile with -DMODULE -DEXPORT_SYMTAB. If the kernel has modversions,
> >> add -DMODVERSIONS -include $(HPATH)/linux/modversions.h. The safest
> >> way is to compile a module in the kernel that exports the objects then
> >> copy the command, substituting the file names.
> >
> >I think I managed to get things right. I added -DEXPORT_SYMTAB to the
> >default flags and added:
> >CFLAGS_EXTRA += $(shell if [ -f $(KERNEL_HEADERS)/linux/modversions.h ]; \
> > then echo -include \
> > $(KERNEL_HEADERS)/linux/modversions.h; fi)
>
> You need -DMODVERSIONS as well.

D'oh...

> Testing for the presence of modversions.h will not work in kbuild 2.5,
> that file is always created with error messages to catch people who
> include it "by hand". OTOH, kbuild 2.5 has support for compiling
> outside the standard kernel tree so who cares :)?

Right. I'm sure some changes will have to be made for external modules
once 2.5 is underway...

--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/
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