[libcxx] [libcxxabi] [libunwind] [libunwind][libcxx][libcxxabi] Fix Exception Handling build for wasm (PR #79667)

[Louis Dionne via cfe-commits]

================
@@ -12,6 +12,7 @@
 #include <libunwind.h>
 
 #include "config.h"
+#ifndef __wasm__
----------------
ldionne wrote:

Similar question as above here. If this file is basically empty on wasm, we should instead avoid adding it in the CMakeLists.txt.

https://github.com/llvm/llvm-project/pull/79667