[PATCH v1] tools build: Fix timerfd feature detection with clang

[Ian Rogers]

Clang's uninitialized-const-pointer warning causes a feature test to
fail when building perf with clang. This disables support for 'perf
kvm stat live'. Add default initialization to new_value as a
workaround.

  test-timerfd.c:15:30: error: variable 'new_value' is uninitialized when passed
			       as a const pointer argument here
			       [-Werror,-Wuninitialized-const-pointer]
     15 |         if (timerfd_settime(fd, 0, &new_value, NULL) != 0)
        |                                     ^~~~~~~~~
  1 error generated.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/build/feature/test-timerfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/build/feature/test-timerfd.c b/tools/build/feature/test-timerfd.c
index 9c72c697a9df..f88e8cc63ef3 100644
--- a/tools/build/feature/test-timerfd.c
+++ b/tools/build/feature/test-timerfd.c
@@ -6,7 +6,7 @@
 
 int main(void)
 {
-	struct itimerspec new_value;
+	struct itimerspec new_value = {};
 
 	int fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
 	if (fd < 0)
-- 
2.55.0.1007.g17ff1f9808-goog