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Do not propagate host RUSTFLAGS when checking for WASM toolchain #9926

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Oct 4, 2021
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Do not propagate host RUSTFLAGS when checking for WASM toolchain #9926

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Do not propagate host RUSTFLAGS when checking for WASM toolchain
koute Oct 4, 2021
3196155
Update utils/wasm-builder/src/prerequisites.rs
bkchr Oct 4, 2021
657e355
Update utils/wasm-builder/src/prerequisites.rs
bkchr Oct 4, 2021
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5 changes: 5 additions & 0 deletions utils/wasm-builder/src/prerequisites.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,11 @@ fn check_wasm_toolchain_installed(
build_cmd.env_remove("CARGO_TARGET_DIR");
run_cmd.env_remove("CARGO_TARGET_DIR");

// Make sure the host's flags aren't used here, e.g. if an alternative linker is specified
// in the RUSTFLAGS then the check we do here will break unless we clear these.
build_cmd.env("CARGO_ENCODED_RUSTFLAGS", "");
run_cmd.env("CARGO_ENCODED_RUSTFLAGS", "");
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build_cmd.output().map_err(|_| err_msg.clone()).and_then(|s| {
if s.status.success() {
let version = run_cmd.output().ok().and_then(|o| String::from_utf8(o.stdout).ok());
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