From 56d5229471ee1634bd0eb029f1aa82a8d87c6fed Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Sun, 15 Jan 2023 17:01:13 -0800
Subject: tools build: Pass libbpf feature only if libbpf 1.0+

libbpf 1.0 represented a cleanup and stabilization of APIs. Simplify
development by only passing the feature test if libbpf 1.0 is installed.

Committer notes:

Change 'make -C tools/perf build-test' so that the LIBBPF_DYNAMIC=1 test
runs only if libbpf is >= 1.0.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Christy Lee <christylee@fb.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Monnet <quentin@isovalent.com>
Cc: Roberto Sassu <roberto.sassu@huawei.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230116010115.490713-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/build/feature/test-libbpf.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'tools/build/feature')

diff --git a/tools/build/feature/test-libbpf.c b/tools/build/feature/test-libbpf.c
index a508756cf4cc..cd9989f52119 100644
--- a/tools/build/feature/test-libbpf.c
+++ b/tools/build/feature/test-libbpf.c
@@ -1,6 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <bpf/libbpf.h>
 
+#if !defined(LIBBPF_MAJOR_VERSION) || (LIBBPF_MAJOR_VERSION < 1)
+#error At least libbpf 1.0 is required for Linux tools.
+#endif
+
 int main(void)
 {
 	return bpf_object__open("test") ? 0 : -1;
-- 
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