assert!(cfg!(target_feature = "sse") && cfg!(target_feature = "sse2")) panic at build on i386, i586, FreeBSD, or many target_os=none x86 targets. about ring HOT 5 OPEN

What are the steps to reproduce? cargo build --target=????

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See the attached log above ☝️

Looks like

--target i686-unknown-freebsd

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What do you get when you do this?

$ rustc --print=cfg --target i686-unknown-freebsd | grep sse
debug_assertions
target_feature="sse"
target_feature="sse2"

For me, rustc indicates that sse and sse2 are there.

I see in your build log that there are warnings that CARGO_CFG_TARGET_FEATURE not set. THat might be a clue.

Make sure you're not disabling SSE/SSSE2 in .cargo/config.toml or otherwise.

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% rustc --print=cfg --target i686-unknown-freebsd | grep sse
debug_assertions

Seems like rust is configured for pentiumpro (no SSEx) in the FreeBSD ports tree?

See https://github.com/freebsd/freebsd-ports/blob/main/lang/rust/files/patch-compiler_rustc__target_src_spec_targets_i686__unknown__freebsd.rs

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At https://www.freebsd.org/releases/14.0R/hardware/#proc-i386, it is written:

2.3. i386 Architecture Support
FreeBSD maintains support for i386 (x86) as a Tier 2 architecture. It is not recommended for new installations.

Support for this architecture will be removed in FreeBSD 15.0.

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