Bug: https://bugs.gentoo.org/741708
From: Ian Jordan <immoloism@gmail.com>
Date: Thu, 01 Nov 204 15:28:39 +0100
Subject: Change Pentium4 baseline to i586

Based on the Debian patch at https://sources.debian.org/patches/rustc/1.80.1%2Bdfsg1-1/behaviour/d-rustc-i686-baseline.patch/
This lowers baseline from Pentium4 to i586.

Thanks-to: Debian Rust Maintainers <pkg-rust-maintainers@alioth-lists.debian.net>

--- a/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs
+++ b/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs
@@ -2,7 +2,7 @@ use crate::spec::{base, Cc, LinkerFlavor, Lld, SanitizerSet, StackProbeType, Tar
 
 pub fn target() -> Target {
     let mut base = base::linux_gnu::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.supported_sanitizers = SanitizerSet::ADDRESS;
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32"]);
--- a/tests/ui/abi/homogenous-floats-target-feature-mixup.rs
+++ b/tests/ui/abi/homogenous-floats-target-feature-mixup.rs
@@ -24,7 +24,8 @@ fn main() {
     match std::env::var("TARGET") {
         Ok(s) => {
             // Skip this tests on i586-unknown-linux-gnu where sse2 is disabled
-            if s.contains("i586") {
+            // Debian: our i686 doesn't have SSE 2..
+            if s.contains("i586") || s.contains("i686") {
                 return
             }
         }
--- a/tests/ui/sse2.rs
+++ b/tests/ui/sse2.rs
@@ -16,7 +16,7 @@ fn main() {
         }
         Err(_) => return,
     }
-    if cfg!(any(target_arch = "x86", target_arch = "x86_64")) {
+    if cfg!(any(target_arch = "x86_64")) {
         assert!(cfg!(target_feature = "sse2"),
                 "SSE2 was not detected as available on an x86 platform");
     }