diag: Try to make diagnostics signal-safer

Link: https://sourceware.org/bugzilla/show_bug.cgi?id=16060

1 files changed, 8 insertions, 0 deletions

diff --git a/build/has/dprintf.c b/build/has/dprintf.c
new file mode 100644
index 0000000..c206fa3
--- /dev/null
+++ b/build/has/dprintf.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <stdio.h>
+
+int main(void) {
+	return dprintf(1, "%s\n", "Hello world!");
+}