On Thu, Jan 31, 2008 at 05:48:51PM +0900, Paul Mundt wrote:
> On Thu, Jan 31, 2008 at 09:38:10AM +0100, Francis Moreau wrote:
> > I'd like to clean a particular directory in the kernel tree.
> >
> > I tried several things such as:
> >
> > $ make drivers/char clean
> > $ make -f scripts/Makefile.clean obj=drivers/char
> >
> > But it doesn't work.
> >
> > Could anybody give me a hint ?
>
> make SUBDIRS=drivers/char clean
>
> should do the trick. Kbuild might have a magic incantation for it these
> days, but that's the way it used to work, and still seems to.
Makefile says:
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRS
KBUILD_EXTMOD ?= $(SUBDIRS)
endif
ifdef M
ifeq ("$(origin M)", "command line")
KBUILD_EXTMOD := $(M)
endif
endif
so M= is apparently the newfangled (and undocumented) way of doing this.
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