Question on compiling a kernel Module

Question on compiling a kernel Module

[Madhav Bhamidipati]

Hello,


I have the following source tree, objective is to get a single kernel
module.ko object.


module/
module/sub-module1
module/sub-module2
module/include
module/objs/


module folder has a Makefile, it may or may not have *.c files, it
invokes sub-* Makefiles
which build respective objects, these objects need to go into objs
folder, finally makefile in 'objs'
builds the module.ko linking all sub-module *.o.

I could not find much information for my requirement in the file
linux/Documentation/kbuild/makefiles.txt

any information with an example for my requirement is greatly
appreciated. Also let me know
how do I expose module/include in sub-module/ c files, looks like
-I../include is not working

-Madhav

Re: Question on compiling a kernel Module

[Jan Engelhardt]

>
> module/
> module/sub-module1
> module/sub-module2
> module/include
> module/objs/


obj-m += my.o
my-objs := sub1/foo.o sub1/bar.o sub2/abc.o sub2/xyz.o
EXTRA_CFLAGS += -I$(src)/include


Should be straightforward.

> module folder has a Makefile, it may or may not have *.c files, it
> invokes sub-* Makefiles
> which build respective objects, these objects need to go into objs
> folder, finally makefile in 'objs'
> builds the module.ko linking all sub-module *.o.
>
> I could not find much information for my requirement in the file
> linux/Documentation/kbuild/makefiles.txt
>
> any information with an example for my requirement is greatly
> appreciated. Also let me know
> how do I expose module/include in sub-module/ c files, looks like
> -I../include is not working


Jan Engelhardt
-- 

Re: Question on compiling a kernel Module

[Alexey Dobriyan]

On Fri, Sep 15, 2006 at 12:10:14PM +0200, Jan Engelhardt wrote:
> >
> > module/
> > module/sub-module1
> > module/sub-module2
> > module/include
> > module/objs/
>
>
> obj-m += my.o
> my-objs := sub1/foo.o sub1/bar.o sub2/abc.o sub2/xyz.o
> EXTRA_CFLAGS += -I$(src)/include
>
>
> Should be straightforward.

XFS does this and makes

	make fs/xfs/linux-2.6/xfs_stats.i

impossible.

>
> > module folder has a Makefile, it may or may not have *.c files, it
> > invokes sub-* Makefiles
> > which build respective objects, these objects need to go into objs
> > folder, finally makefile in 'objs'
> > builds the module.ko linking all sub-module *.o.
> >
> > I could not find much information for my requirement in the file
> > linux/Documentation/kbuild/makefiles.txt
> >
> > any information with an example for my requirement is greatly
> > appreciated. Also let me know
> > how do I expose module/include in sub-module/ c files, looks like
> > -I../include is not working

Re: Question on compiling a kernel Module

[Sam Ravnborg]

On Fri, Sep 15, 2006 at 03:32:06PM +0530, Madhav Bhamidipati wrote:
> Hello,
> 
> 
> I have the following source tree, objective is to get a single kernel
> module.ko object.
> 
> 
> module/
> module/sub-module1
> module/sub-module2
> module/include
> module/objs/
> 
> 
> module folder has a Makefile, it may or may not have *.c files, it
> invokes sub-* Makefiles
> which build respective objects, these objects need to go into objs
> folder, finally makefile in 'objs'
> builds the module.ko linking all sub-module *.o.
> 
> I could not find much information for my requirement in the file
> linux/Documentation/kbuild/makefiles.txt
Please read modules.txt in same dir.

Let me know if you miss info (patchewelcome!).

	Sam