ebuild selected require cpu_flags_x86_sse2 [SOLVED]

[yookoala]

I'm trying to install Gentoo on an old laptop.

I have arrived at the step to run grub-install and it failed. Turns out the grub installation was not successful. Through out the installation process, I think I missed several signs that some previous step has failed.

If I read the error correctly, it says something like "because some of my selected package requires rust, and rust needs my CPU to support SSE2, the installation fails."

So my questions are:

• How do I unselect packages that cause the installation problem(s)?
  
• I can do my installation without GNOME. Is there a way I can install a systemd-boot setup without rust?
  
• If I cannot use systemd, then how do I revert my installation enough for a sysinitv installation without redo all my installation procedures?
  

Contexts:

If I now run:

[fedeliallalinea]

I think it is the gnome-base/librsvg package that requires rust to compile, but there are other packages that may require rust.
You can install the precompiled dev-lang/rust-bin instead of dev-lang/rust.
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[Hu]

Welcome to the forums.

Unfortunately, even rust-bin requires SSE2. This is a known issue upstream, which the Rust project refuses to fix. They only provide rust compilers that require SSE2. I think some users (possibly eccerr0r?) have managed to get a no-SSE2 Rust to build, but it requires some special work. Avoiding Rust entirely on no-SSE2 systems is probably the path of less frustration. A quick search for rust sse2 x86 leads me to https://docs.rs/safe_arch which claims:

[yookoala]

Thank you both for replying.

[sMueggli]

Please show

[fedeliallalinea]

[yookoala]

[Hu]

I think that is the wrong solution. It may solve this particular problem, but in general there is no guarantee that the kernel names shown in /proc/cpuinfo are all CPU_FLAGS_X86 values. Why did you do that instead of using the tool that was suggested to you?

[yookoala]

[Hu]

I don't think that's correct, either. The recommended package has minimal dependencies, and should have been possible to install without sse2 support. What errors did you get when you tried to install it?

[eccerr0r]

I think the main reason why the rust upstream devs don't want to supply a non-SSE2 bootstrapping binary is because that would mean they would have to maintain the non-SSE2 output stream...which they don't want to do and want other people to submit patches, in hopes the code stream would eventually get deleted due to "but nobody uses it..." which they can't say if the bootstrap code uses the stream! :\

Anyway AFAIK all 64-bit capable CPUs support SSE2. The only 32-bit only CPUs that support SSE2 are:

Pentium 4 Northwood (meaning, all P4's support SSE2)
Atom Bonnell (meaning all Atoms support SSE2)
Pentium M
Core Solo/Core Duo (Meaning all of Core, Core 2, Core i- xyz support SSE2)

I was able to build a mostly working rust compiler at some point long ago that worked enough to build librsvg but would not build rust to run on an Athlon XP. I have since given up on that path as I no longer have any worthwhile 32-bit machines/cpus that can run SMP and can't run 64-bit as the Athlon XP is unreliable due to defective northbridge/motherboard.

Known CPUs to not have SSE2:
Athlon XP (including Barton) and older
Pentium III (including Tualatin) and older

If you need librsvg for gnome, the preferred path if you have one of these old cpus is use an old version of librsvg which is written in C. Mask all versions of librsvg over 2.42 I believe is the best way, IIRC it was around then that they switched to rust.
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

[yookoala]

[Chiitoo]