[PATCH] tools/perf/tests: Fix Basic BPF llvm compile to check for libbpf support

[Athira Rajeev <atrajeev@linux.vnet.ibm.com>]

Basic BPF llvm compile fails in systems with libbpf
that doesn't support BTF. Log shows below information.

	libbpf: BTF is required, but is missing or corrupted.
	Failed to parse test case 'Basic BPF llvm compile'
	test child finished with -2
	---- end ----

Here BPF llvm compile fails due to missing BTF support.
Fix the llvm test to skip the test incase BTF support is
missing.

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
---
 tools/perf/tests/llvm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index 0bc25a56cfef..4c73c9eab0bb 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -4,6 +4,7 @@
 #include <string.h>
 #include "tests.h"
 #include "debug.h"
+#include <errno.h>
 
 #ifdef HAVE_LIBBPF_SUPPORT
 #include <bpf/libbpf.h>
@@ -14,8 +15,12 @@ static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
 	struct bpf_object *obj;
 
 	obj = bpf_object__open_mem(obj_buf, obj_buf_sz, NULL);
-	if (libbpf_get_error(obj))
+	if (libbpf_get_error(obj)) {
+		/* Skip if there is no BTF support */
+		if (errno == ENOENT)
+			return TEST_SKIP;
 		return TEST_FAIL;
+	}
 	bpf_object__close(obj);
 	return TEST_OK;
 }
-- 
2.27.0