Add a test that the const extern fn macro works

tgross35 · tgross35 · commit 0304ed535e94 · 2024-11-25T05:54:29.000-05:00
By default, any functions defined in this macro (such as `CMSG_SPACE`)
should be `const`.
diff --git a/tests/const_fn.rs b/tests/const_fn.rs
@@ -0,0 +1,3 @@
+#[cfg(target_os = "linux")]
+const _FOO: libc::c_uint = unsafe { libc::CMSG_SPACE(1) };
+//^ if CMSG_SPACE is not const, this will fail to compile

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+#[cfg(target_os = "linux")]`
	`2`	`+const _FOO: libc::c_uint = unsafe { libc::CMSG_SPACE(1) };`
	`3`	`+//^ if CMSG_SPACE is not const, this will fail to compile`