From: Alexei Starovoitov > Sent: 26 April 2016 15:35 > On Tue, Apr 26, 2016 at 01:09:32PM +0200, Jesper Dangaard Brouer wrote: > > It is not intuitive that 'make' must be run from the top level > > directory with argument "samples/bpf/" to compile these eBPF samples. > > > > Introduce a kbuild make file trick that allow make to be run from the > > "samples/bpf/" directory itself. It basically change to the top level > > directory and call "make samples/bpf/" with the "/" slash after the > > directory name. > > > > Also add a clean target that only cleans this directory, by taking > > advantage of the kbuild external module setting M=$PWD. > > > > Signed-off-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> > > --- > > samples/bpf/Makefile | 8 ++++++++ > > samples/bpf/README.rst | 3 +++ > > 2 files changed, 11 insertions(+) > > > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > > index 7ac66f5bbbf5..7370dfee482f 100644 > > --- a/samples/bpf/Makefile > > +++ b/samples/bpf/Makefile > > @@ -85,6 +85,14 @@ HOSTLOADLIBES_test_overhead += -lelf -lrt > > # make samples/bpf/ LLC=~/git/llvm/build/bin/llc > > LLC ?= llc > > > > +# Trick to allow make to be run from this directory > > +all: > > + $(MAKE) -C ../../ $$PWD/ > > + > > +clean: > > + $(MAKE) -C ../../ M=$$PWD clean > > + @rm -f *~ > > + > > nice trick! Another nice 'trick' is to write a GNUmakefie containing the local rules. GNU make will read it in preference to Makefile and makefile. David -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
