Getting out-of-kernel modules compiled

Getting out-of-kernel modules compiled

[linux-os (Dick Johnson)]

Back in 2004, we make the following to compile
out-of-kernel modules. It worked.

Now, the kernel build doesn't "know" how to handle "asm.S"
files and always thinks a "name.o" file is the result of
a "name.c" file, so I can't buld them no  matter how hard
I try!

What do I need to do????

#
#	Project Makefile for kernel versions over 6 
#	Created 05-OCT-2004	Richard B. Johnson
#

VER	:=	$(shell uname -r)
PWD	:=	$(shell pwd)

all:		driver

driver:
 		make V=1 -C /usr/src/linux-$(VER) SUBDIRS=$(PWD) modules

rtc_hwr.o:	rtc_hwr.S
 		as -o $@ $<

obj-m		= 	rtc.o
obj-m		+= 	rtc_hwr.o

clean:
 		rm -rf *.o *.ko *.mod.c \.*.cmd

make[2]: *** No rule to make target `/root/BCS/rtc/rtc_hwr.c', needed by `/root/BCS/rtc/rtc_hwr.o'.  Stop.
make[1]: *** [_module_/root/BCS/rtc] Error 2
make: *** [driver] Error 2


Cheers,
Dick Johnson
Penguin : Linux version 2.6.25.17 on an i686 machine (4784.32 BogoMips).
My book : http://www.AbominableFirebug.com/
.


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Thank you.

Re: Getting out-of-kernel modules compiled

[Sam Ravnborg]

On Wed, Jan 21, 2009 at 10:57:25AM -0500, linux-os (Dick Johnson) wrote:
> 
> Back in 2004, we make the following to compile
> out-of-kernel modules. It worked.
> 
> Now, the kernel build doesn't "know" how to handle "asm.S"
> files and always thinks a "name.o" file is the result of
> a "name.c" file, so I can't buld them no  matter how hard
> I try!
> 
> What do I need to do????
> 
> #
> #	Project Makefile for kernel versions over 6 
> #	Created 05-OCT-2004	Richard B. Johnson
> #
> 
> VER	:=	$(shell uname -r)
> PWD	:=	$(shell pwd)
> 
> all:		driver
> 
> driver:
>  		make V=1 -C /usr/src/linux-$(VER) SUBDIRS=$(PWD) modules
> 
> rtc_hwr.o:	rtc_hwr.S
>  		as -o $@ $<
> 
> obj-m		= 	rtc.o
> obj-m		+= 	rtc_hwr.o

kbuild has never (at least for a very long time) not
supported to implement a module only in assembler.

So you will have no luck trying to build the
module rtc_hrw.ko

What you can do is to define a module like htis:
obj-m := dick.o
dick-y := rtc.o rtc_hwr.o

This will properly build rtc_hwr.S => rtc_hwr.o

	Sam

Re: Getting out-of-kernel modules compiled

[linux-os (Dick Johnson)]

On Wed, 21 Jan 2009, Sam Ravnborg wrote:
[SNIPPED...]

> dick-y := rtc.o rtc_hwr.o
>
> This will properly build rtc_hwr.S => rtc_hwr.o
>
> 	Sam
>
Yes, thanks. It works!

Cheers,
Dick Johnson
Penguin : Linux version 2.6.25.17 on an i686 machine (4784.32 BogoMips).
My book : http://www.AbominableFirebug.com/
.


****************************************************************
The information transmitted in this message is confidential and may be privileged. Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is prohibited. If you are not the intended recipient, please notify Analogic Corporation immediately - by replying to this message or by sending an email to DeliveryErrors@analogic.com - and destroy all copies of this information, including any attachments, without reading or disclosing them.

Thank you.