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selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir

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Reorder includes search path to ensure $(OUTPUT) and $(CURDIR) go before
libbpf's directory. Also fix bpf_helpers.h to include bpf_helper_defs.h in
such a way as to leverage includes search path. This allows selftests to not
use libbpf's local and potentially stale bpf_helper_defs.h. It's important
because selftests/bpf's Makefile only re-generates bpf_helper_defs.h in
seltests' output directory, not the one in libbpf's directory.

Also force regeneration of bpf_helper_defs.h when libbpf.a is updated to
reduce staleness.

Fixes: fa633a0f8919 ("libbpf: Fix build on read-only filesystems")
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200110051716.1591485-3-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2020-01-09 21:17:15 -08:00
committed by Andrii Nakryiko
parent 1ef23426e7
commit 2c8602eb54
1 changed files with 1 additions and 1 deletions
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2
src/bpf_helpers.h
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@@ -2,7 +2,7 @@
#ifndef __BPF_HELPERS__
#define __BPF_HELPERS__
#include "bpf_helper_defs.h"
#include <bpf_helper_defs.h>
#define __uint(name, val) int (*name)[val]
#define __type(name, val) typeof(val) *name