wavm: fix build with Clang 13. (#227)

Signed-off-by: Piotr Sikora <[email protected]>

Author: PiotrSikora

bazel/external/wavm.patch

@@ -0,0 +1,14 @@
+# Fix build with Clang 13. (https://github.com/WAVM/WAVM/pull/332)
+
+diff --git a/Lib/Platform/POSIX/ThreadPOSIX.cpp b/Lib/Platform/POSIX/ThreadPOSIX.cpp
+index e1f232f6..d3241349 100644
+--- a/Lib/Platform/POSIX/ThreadPOSIX.cpp
++++ b/Lib/Platform/POSIX/ThreadPOSIX.cpp
+@@ -173,6 +173,7 @@ WAVM_NO_ASAN static void touchStackPages(U8* minAddr, Uptr numBytesPerPage)
+ 		sum += *touchAddr;
+ 		if(touchAddr < minAddr + numBytesPerPage) { break; }
+ 	}
++	WAVM_SUPPRESS_UNUSED(sum);
+ }
+ 
+ bool Platform::initThreadAndGlobalSignalsOnce()

bazel/repositories.bzl

@@ -117,6 +117,8 @@ def proxy_wasm_cpp_host_repositories():
         sha256 = "bf2b2aec8a4c6a5413081c0527cb40dd16cb67e9c74a91f8a82fe1cf27a3c5d5",
         strip_prefix = "WAVM-c8997ebf154f3b42e688e670a7d0fa045b7a32a0",
         url = "https://github.com/WAVM/WAVM/archive/c8997ebf154f3b42e688e670a7d0fa045b7a32a0.tar.gz",
+        patches = ["@proxy_wasm_cpp_host//bazel/external:wavm.patch"],
+        patch_args = ["-p1"],
     )
 
     native.bind(