lint: Add test for no_mangle

Author: richo

src/libstd/rt/unwind.rs

@@ -254,7 +254,6 @@ pub mod eabi {
     }
 
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
     pub extern "C" fn rust_eh_personality_catch(
         _version: c_int,
         actions: uw::_Unwind_Action,
@@ -293,7 +292,7 @@ pub mod eabi {
 
     #[lang="eh_personality"]
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
+    #[allow(private_no_mangle_fns)]
     pub extern "C" fn rust_eh_personality(
         version: c_int,
         actions: uw::_Unwind_Action,
@@ -309,7 +308,6 @@ pub mod eabi {
     }
 
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
     pub extern "C" fn rust_eh_personality_catch(
         _version: c_int,
         actions: uw::_Unwind_Action,
@@ -348,7 +346,7 @@ pub mod eabi {
 
     #[lang="eh_personality"]
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
+    #[allow(private_no_mangle_fns)]
     extern "C" fn rust_eh_personality(
         state: uw::_Unwind_State,
         ue_header: *mut uw::_Unwind_Exception,
@@ -361,7 +359,6 @@ pub mod eabi {
     }
 
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
     pub extern "C" fn rust_eh_personality_catch(
         state: uw::_Unwind_State,
         _ue_header: *mut uw::_Unwind_Exception,
@@ -439,7 +436,7 @@ pub mod eabi {
 
     #[lang="eh_personality"]
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
+    #[allow(private_no_mangle_fns)]
     extern "C" fn rust_eh_personality(
         exceptionRecord: *mut EXCEPTION_RECORD,
         establisherFrame: *mut c_void,
@@ -454,7 +451,6 @@ pub mod eabi {
     }
 
     #[no_mangle] // referenced from rust_try.ll
-    #[allow(unexported_no_mangle)]
     pub extern "C" fn rust_eh_personality_catch(
         exceptionRecord: *mut EXCEPTION_RECORD,
         establisherFrame: *mut c_void,

src/test/compile-fail/lint-unexported-no-mangle.rs

@@ -0,0 +1,25 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags:-F private_no_mangle_fns
+
+// FIXME(#19495) no_mangle'ing main ICE's.
+#[no_mangle]
+fn foo() { //~ ERROR function foo is marked #[no_mangle], but not exported
+}
+
+#[no_mangle]
+pub fn bar()  {
+}
+
+fn main() {
+    foo();
+    bar();
+}