control libunwind linkage mode via crt-static on gnullvm targets

Co-authored-by: Kleis Auke Wolthuizen <[email protected]>

Author: 2 people

unwind/src/lib.rs

@@ -178,3 +178,8 @@ cfg_if::cfg_if! {
 #[cfg(target_os = "hurd")]
 #[link(name = "gcc_s")]
 extern "C" {}
+
+#[cfg(all(target_os = "windows", target_env = "gnu", target_abi = "llvm"))]
+#[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
+extern "C" {}

unwind/src/libunwind.rs

@@ -102,12 +102,9 @@ pub type _Unwind_Exception_Cleanup_Fn =
 // rustc_codegen_ssa::src::back::symbol_export, rustc_middle::middle::exported_symbols
 // and RFC 2841
 #[cfg_attr(
-    any(
-        all(
-            feature = "llvm-libunwind",
-            any(target_os = "fuchsia", target_os = "linux", target_os = "xous")
-        ),
-        all(target_os = "windows", target_env = "gnu", target_abi = "llvm")
+    all(
+        feature = "llvm-libunwind",
+        any(target_os = "fuchsia", target_os = "linux", target_os = "xous")
     ),
     link(name = "unwind", kind = "static", modifiers = "-bundle")
 )]