Merge pull request #2365 from alexcrichton/fix-rustflags-for-native

Fix build when RUSTFLAGS is set for native builds

build.rs

@@ -10,6 +10,10 @@ use cargo_target_dep::build_target_dep;
 const TIMER_TRIGGER_INTEGRATION_TEST: &str = "examples/spin-timer/app-example";
 
 fn main() {
+    // Don't inherit flags from our own invocation of cargo into sub-invocations
+    // since the flags are intended for the host and we're compiling for wasm.
+    std::env::remove_var("CARGO_ENCODED_RUSTFLAGS");
+
     // Extract environment information to be passed to plugins.
     // Git information will be set to defaults if Spin is not
     // built within a Git worktree.