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authorJesper Dangaard Brouer <brouer@redhat.com>2016-04-28 14:21:09 +0200
committerDavid S. Miller <davem@davemloft.net>2016-04-29 14:25:33 -0400
commitb62a796c109ca0be3e49de620a8ea8248412446d (patch)
tree94408914e03cc326e3e8764a71c72ce6a1259d43
parent1c97566d515de2ef66873e30288b150f0154f3b3 (diff)
downloadlinux-b62a796c109ca0be3e49de620a8ea8248412446d.tar.gz
samples/bpf: allow make to be run from samples/bpf/ directory
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@redhat.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--samples/bpf/Makefile8
-rw-r--r--samples/bpf/README.rst3
2 files changed, 11 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 45859c99f573..dd63521832d8 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 *~
+
# Verify LLVM compiler is available and bpf target is supported
.PHONY: verify_cmd_llc verify_target_bpf
diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst
index 6f133f3f0075..e36687d900c8 100644
--- a/samples/bpf/README.rst
+++ b/samples/bpf/README.rst
@@ -36,6 +36,9 @@ top level directory::
Do notice the "/" slash after the directory name.
+It is also possible to call make from this directory. This will just
+hide the the invocation of make as above with the appended "/".
+
Manually compiling LLVM with 'bpf' support
------------------------------------------