Current glibc defines a gettid function, which results in the following error: io_uring-bench.c:133:12: error: static declaration of ‘gettid’ follows non-static declaration 133 | static int gettid(void) | ^~~~~~ In file included from /usr/include/unistd.h:1170, from io_uring-bench.c:27: /usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: previous declaration of ‘gettid’ was here 34 | extern __pid_t gettid (void) __THROW; | ^~~~~~ Rename the syscall-based gettid to sys_gettid to avoid a name conflict. Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx> --- Another alternative would be for io_uring-bench to count on recent glibc, and call settid without defining its own version. tools/io_uring/io_uring-bench.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/io_uring/io_uring-bench.c b/tools/io_uring/io_uring-bench.c index 0f257139b003..850f0ee90828 100644 --- a/tools/io_uring/io_uring-bench.c +++ b/tools/io_uring/io_uring-bench.c @@ -130,7 +130,7 @@ static int io_uring_register_files(struct submitter *s) s->nr_files); } -static int gettid(void) +static int sys_gettid(void) { return syscall(__NR_gettid); } @@ -281,7 +281,7 @@ static void *submitter_fn(void *data) struct io_sq_ring *ring = &s->sq_ring; int ret, prepped; - printf("submitter=%d\n", gettid()); + printf("submitter=%d\n", sys_gettid()); srand48_r(pthread_self(), &s->rand); -- 2.28.0.rc0