Invoke gcc with -nodefaultlibs

This will hopefully bring us closer to #11937. We're still using gcc's idea of
"startup files", but this should prevent us from leaking in dependencies that we
don't quite want (libgcc for example once compiler-rt is what we use).

1 files changed, 10 insertions, 0 deletions

diff --git a/src/libstd/rt/unwind.rs b/src/libstd/rt/unwind.rs
index 9f89becaef9..5718a27bfef 100644
--- a/src/libstd/rt/unwind.rs
+++ b/src/libstd/rt/unwind.rs
@@ -143,6 +143,16 @@ mod libunwind {
     pub type _Unwind_Exception_Cleanup_Fn = extern "C" fn(unwind_code: _Unwind_Reason_Code,
                                                           exception: *_Unwind_Exception);
 
+    #[cfg(target_os = "linux")]
+    #[cfg(target_os = "freebsd")]
+    #[cfg(target_os = "win32")]
+    #[link(name = "gcc_s")]
+    extern {}
+
+    #[cfg(target_os = "android")]
+    #[link(name = "gcc")]
+    extern {}
+
     extern "C" {
         pub fn _Unwind_RaiseException(exception: *_Unwind_Exception) -> _Unwind_Reason_Code;
         pub fn _Unwind_DeleteException(exception: *_Unwind_Exception);