From dba5e877b87050fa63bf3264d2d00e2d9dca2795 Mon Sep 17 00:00:00 2001
From: Ivan Tham <pickfire@riseup.net>
Date: Tue, 22 Sep 2020 14:39:13 +0800
Subject: [PATCH] Add alternative extern syntax

---
 compiler/rustc_error_codes/src/error_codes/E0756.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/rustc_error_codes/src/error_codes/E0756.md b/compiler/rustc_error_codes/src/error_codes/E0756.md
index ffdc421aab584..19d24a76afdda 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0756.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0756.md
@@ -21,6 +21,9 @@ extern "C" {
     #[ffi_const] // ok!
     pub fn strlen(s: *const i8) -> i32;
 }
+
+#[ffi_pure]
+extern "C" pub fn foo() {} // ok!
 # fn main() {}
 ```