first pass of merging in warp (doesn't build)

.cargo/config.toml

@@ -8,11 +8,18 @@
 # `script/bundle`.
 MACOSX_DEPLOYMENT_TARGET = "10.14"
 
-[build]
-rustflags = ["-C", "symbol-mangling-version=v0", "-C", "link-args=-Wl,-headerpad_max_install_names"]
-
 [net]
 git-fetch-with-cli = true
 
+# Use the v0 symbol mangling scheme on every target. It encodes generic
+# instantiations (which the legacy scheme hashes away irreversibly), improving
+# demangled names in backtraces and Sentry symbolication. On wasm the shipped
+# bundle strips symbol names, so this only enriches the split-off debug artifact.
+[target.'cfg(all())']
+rustflags = ["-C", "symbol-mangling-version=v0"]
+
+[target.'cfg(target_os = "macos")']
+rustflags = ["-C", "link-args=-Wl,-headerpad_max_install_names"]
+
 [target.'cfg(target_family = "wasm")']
 rustflags = ["--cfg=web_sys_unstable_apis"]