added wasm port

rdraught-w4/.cargo/config.toml

@@ -0,0 +1,20 @@
+[build]
+target = "wasm32-unknown-unknown"
+
+[target.wasm32-unknown-unknown]
+rustflags = [
+    "-A", "dead_code",
+
+    # Import memory from WASM-4
+    "-C", "link-arg=--import-memory",
+    "-C", "link-arg=--initial-memory=65536",
+    "-C", "link-arg=--max-memory=65536",
+    # "-C", "link-args=--relocatable",
+
+    # Reserve 2044 bytes of stack space, offset from 6580.
+    # Bump this value, 16-byte aligned, if the framebuffer gets corrupted.
+    "-C", "link-arg=-zstack-size=14752",
+
+    # Not working? https://github.com/rust-lang/rust/issues/46645#issuecomment-423912553
+    # "-C", "link-arg=--global-base=14752",
+]