[Bug 223300] www/firefox (firefox-56.0.2_3,1) with rust-1.21.0 on amd64: error[E0432]: unresolved import `x86::sse2`

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223300

--- Comment #13 from Jan Beich <jbeich at FreeBSD.org> ---
(In reply to vvd from comment #12)
> OPTIONS_FILE_SET+=PORT_LLVM

Can you try without? Rust uses patched LLVM 4.0 by default which maybe required
for cfg_target_feature to detect SSE2.

https://github.com/rust-lang/rust/pull/31709
https://github.com/rust-lang/rust/blob/690ff045949a/src/rustllvm/PassWrapper.cpp#L200
https://github.com/rust-lang/rust/blob/690ff045949a/src/bootstrap/compile.rs#L543
https://github.com/rust-lang/rust/blob/690ff045949a/src/bootstrap/lib.rs#L505

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