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bpf/preload: Make sure Makefile cleans up after itself, and add .gitignore 

The Makefile in bpf/preload builds a local copy of libbpf, but does not
properly clean up after itself. This can lead to subsequent compilation
failures, since the feature detection cache is kept around which can lead
subsequent detection to fail.

Fix this by properly setting clean-files, and while we're at it, also add a
.gitignore for the directory to ignore the build artifacts.

Fixes: d71fa5c976 ("bpf: Add kernel module with user mode driver that populates bpffs.")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200927193005.8459-1-toke@redhat.com
This commit is contained in:
Toke Høiland-Jørgensen 2020-09-27 21:30:05 +02:00 committed by Alexei Starovoitov
parent 3aae4a3806
commit 9d9aae53b9
2 changed files with 6 additions and 0 deletions
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4
kernel/bpf/preload/.gitignore vendored Normal file
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@ -0,0 +1,4 @@
/FEATURE-DUMP.libbpf
/bpf_helper_defs.h
/feature
/bpf_preload_umd

2
kernel/bpf/preload/Makefile
View File

@ -12,6 +12,8 @@ userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
userprogs := bpf_preload_umd
clean-files := $(userprogs) bpf_helper_defs.h FEATURE-DUMP.libbpf staticobjs/ feature/
bpf_preload_umd-objs := iterators/iterators.o
bpf_preload_umd-userldlibs := $(LIBBPF_A) -lelf -lz