Building multi-file modules

Building multi-file modules

[Arlie Stephens]

Hi Folks,

I've got a module, call it foo, presently built from a single source
file, drivers/char/foo.c It's gotten enormous, so I want to split it.
Ideally I'd keep the original name for one of the source files. So
what I want is a module named foo, build from source files foo.c,
bar.c and baz.c

kbuild is being uncooperative. 

The following works:

obj-$(CONFIG_FOO) += foo_renamed.o
foo_renamed-objs := foo.o bar.o baz.o

I'd just prefer not to rename either the module or the original source
file. Is this supposed to be possible, and if so, how?

I'm on RHEL 6.1, aka kernel 2.6.32, in case that matters.  Also, in
case that matters, I'm building the module into the kerenl ("y" not
"m" in the config.) 


----what I've tried----
The following gives me warnings from make:

obj-$(CONFIG_FOO) += foo.o
foo-objs := foo.o bar.o baz.o


The following never compiles foo.c:

obj-$(CONFIG_FOO) += foo.o
foo-objs := bar.o baz.o


Thanks for any insight,

--
Arlie

(Arlie Stephens					arlie at worldash.org)

Building multi-file modules

[Yuva Raj]

Hi Stephens,

Try this below one.

obj-$(CONFIG_FOO) +=  foo.o
foo-y := bar.o baz.o

This compiles module foo.ko from the foo.c , bar,c baz.c

Refer this for more information on Kbuild.

https://www.kernel.org/doc/Documentation/kbuild/modules.txt

Regards,
Yuva



On Tue, Apr 30, 2013 at 1:48 AM, Arlie Stephens <arlie@worldash.org> wrote:

> Hi Folks,
>
> I've got a module, call it foo, presently built from a single source
> file, drivers/char/foo.c It's gotten enormous, so I want to split it.
> Ideally I'd keep the original name for one of the source files. So
> what I want is a module named foo, build from source files foo.c,
> bar.c and baz.c
>
> kbuild is being uncooperative.
>
> The following works:
>
> obj-$(CONFIG_FOO) += foo_renamed.o
> foo_renamed-objs := foo.o bar.o baz.o
>
> I'd just prefer not to rename either the module or the original source
> file. Is this supposed to be possible, and if so, how?
>
> I'm on RHEL 6.1, aka kernel 2.6.32, in case that matters.  Also, in
> case that matters, I'm building the module into the kerenl ("y" not
> "m" in the config.)
>
>
> ----what I've tried----
> The following gives me warnings from make:
>
> obj-$(CONFIG_FOO) += foo.o
> foo-objs := foo.o bar.o baz.o
>
>
> The following never compiles foo.c:
>
> obj-$(CONFIG_FOO) += foo.o
> foo-objs := bar.o baz.o
>
>
> Thanks for any insight,
>
> --
> Arlie
>
> (Arlie Stephens                                 arlie at worldash.org)
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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