help w/ kbuild

rrlangly · 03-19-2010, 08:08 PM

I'm trying to make a kernel module, but I'm getting stuck on the kbuild system. Can anyone advise of my problem w/ this Makefile? I'm using kernel 2.6.31-r6

Code:

obj-$(CONFIG_ABC) += abc.o

abc-objs := dabc.o

modules:
    $(MAKE) -C $(KERNELDIR) M=$(PWD) modules

modules_install:
    $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install

all: 
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

And when I try to build, here's the error I get.

Code:

$ make
make -C  M=/home/projects/ABC/ksrc/net/abc modules
make: *** M=/home/projects/ABC/ksrc/net/abc: No such file or directory.  Stop.
make: *** [modules] Error 2

/home/projects/ABC/ksrc/net/abc is the directory where I've placed the Makefile and source files.

neonsignal · 03-21-2010, 06:05 AM

The problem is that '$(KERNELDIR)' is not defined (it should be the path to the kernel source directory), so it expands to nothing.

Quote:

Code:

make -C  M=/home/projects/ABC/ksrc/net/abc modules

Because of that, the '-C' flag is using the following argument 'M=/home/projects...' as the destination directory. This directory does not exist (ie, there is no directory named 'M=...').