building external library under 2.6

building external library under 2.6

[Frederic Dumoulin]

Hi,

I succeeded to build an externel module under 2.6 with the following Makefile:

ifneq ($(KERNELRELEASE),)
obj-m		:= testKernel.o
testKernel-objs	:= $(OBJS)
else
KDIR		:= /lib/modules/$(shell uname -r)/build
PWD		:= $(shell pwd)
testKernel.ko :
	$(MAKE) -C $(KDIR) M=$(PWD) modules
endif



I made modifications in order to build a library:

ifneq ($(KERNELRELEASE),)
lib-y		:= $(OBJS)
else
KDIR		:= /lib/modules/$(shell uname -r)/build
PWD		:= $(shell pwd)
lib.a :
	$(MAKE) -C $(KDIR) M=$(PWD) modules
endif

I've just the following output:

make -C /lib/modules/2.6.8.1/build M=xxx/testKernel modules
make[1]: Entering directory `/usr/src/linux-2.6.8.1'
   Building modules, stage 2.
   MODPOST
make[1]: Leaving directory `/usr/src/linux-2.6.8.1'

I've got neither .o nor .a files

What's wrong?



Fred

Re: building external library under 2.6

[Sam Ravnborg]

> Hi,
>
> I succeeded to build an externel module under 2.6 with the following
> Makefile:
>
> ifneq ($(KERNELRELEASE),)
> obj-m		:= testKernel.o
> testKernel-objs	:= $(OBJS)
> else
> KDIR		:= /lib/modules/$(shell uname -r)/build
> PWD		:= $(shell pwd)
> testKernel.ko :
> 	$(MAKE) -C $(KDIR) M=$(PWD) modules
> endif
Look ok except the way you use testKernel.ko.
Much better to use all: since this will not conflict
with a potential output file.

>
> I made modifications in order to build a library:
>
> ifneq ($(KERNELRELEASE),)
> lib-y		:= $(OBJS)
> else
> KDIR		:= /lib/modules/$(shell uname -r)/build
> PWD		:= $(shell pwd)
> lib.a :
> 	$(MAKE) -C $(KDIR) M=$(PWD) modules
> endif

Try wil all: as replacement for lib.a:
It should cure things.

No access to Linux box atm so I cannot check.

   Sam

Re: building external library under 2.6

[Frederic Dumoulin]

It doesn't change anything!

Sam Ravnborg wrote:
>>Hi,
>>
>>I succeeded to build an externel module under 2.6 with the following
>>Makefile:
>>
>>ifneq ($(KERNELRELEASE),)
>>obj-m		:= testKernel.o
>>testKernel-objs	:= $(OBJS)
>>else
>>KDIR		:= /lib/modules/$(shell uname -r)/build
>>PWD		:= $(shell pwd)
>>testKernel.ko :
>>	$(MAKE) -C $(KDIR) M=$(PWD) modules
>>endif
> 
> Look ok except the way you use testKernel.ko.
> Much better to use all: since this will not conflict
> with a potential output file.
> 
> 
>>I made modifications in order to build a library:
>>
>>ifneq ($(KERNELRELEASE),)
>>lib-y		:= $(OBJS)
>>else
>>KDIR		:= /lib/modules/$(shell uname -r)/build
>>PWD		:= $(shell pwd)
>>lib.a :
>>	$(MAKE) -C $(KDIR) M=$(PWD) modules
>>endif
> 
> 
> Try wil all: as replacement for lib.a:
> It should cure things.
> 
> No access to Linux box atm so I cannot check.
> 
>    Sam
>