ioq: Check for io_uring_register_iowq_max_workers() before using itHEADmain

This allows us to build against liburing as old as version 2.0, which is
apparently shipped by the latest Amazon Linux distribution.

Fixes: https://github.com/tavianator/bfs/issues/147

1 files changed, 11 insertions, 0 deletions

diff --git a/build/has/io-uring-max-workers.c b/build/has/io-uring-max-workers.c
new file mode 100644
index 0000000..34ab5b7
--- /dev/null
+++ b/build/has/io-uring-max-workers.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <liburing.h>
+
+int main(void) {
+	struct io_uring ring;
+	io_uring_queue_init(1, &ring, 0);
+	unsigned int values[] = {0, 0};
+	return io_uring_register_iowq_max_workers(&ring, values);
+}