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85 lines
4 KiB
Diff
85 lines
4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
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Date: Fri, 12 Mar 2021 17:31:56 +0100
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Subject: [PATCH] compiler: Change LLVM targets
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- Change x86_64-unknown-linux-gnu to use x86_64-pc-linux-gnu
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- Change i686-unknown-linux-gnu to use i686-pc-linux-gnu
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Reintroduce the aliasing that was removed in 1.52.0 and alias the -pc-
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triples to the -unknown- triples. This avoids defining proper -pc-
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targets, as things break when this is done:
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- The crate ecosystem expects the -unknown- targets. Making -pc-
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rustc's host triple (and thus default target) would break various
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crates.
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- Firefox's build breaks when the host triple (from
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`rustc --version --verbose`) is different from the target triple
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(from `rustc --print target-list`) that best matches autoconf.
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---
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compiler/rustc_session/src/config.rs | 2 +-
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compiler/rustc_target/src/spec/mod.rs | 9 +++++++++
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.../src/spec/targets/i686_unknown_linux_gnu.rs | 2 +-
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.../src/spec/targets/x86_64_unknown_linux_gnu.rs | 2 +-
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4 files changed, 12 insertions(+), 3 deletions(-)
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diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
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index 0c21e4eb43e7..6f294790cdbb 100644
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--- a/compiler/rustc_session/src/config.rs
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+++ b/compiler/rustc_session/src/config.rs
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@@ -2255,7 +2255,7 @@ pub fn parse_target_triple(early_dcx: &EarlyDiagCtxt, matches: &getopts::Matches
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early_dcx.early_error(format!("target file {path:?} does not exist"))
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})
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}
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- Some(target) => TargetTriple::TargetTriple(target),
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+ Some(target) => TargetTriple::from_alias(target),
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_ => TargetTriple::from_triple(host_triple()),
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}
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}
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diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
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index b688c97311a0..bd8a5a7f43b2 100644
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--- a/compiler/rustc_target/src/spec/mod.rs
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+++ b/compiler/rustc_target/src/spec/mod.rs
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@@ -3485,6 +3485,15 @@ pub fn from_path(path: &Path) -> Result<Self, io::Error> {
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Ok(TargetTriple::TargetJson { path_for_rustdoc: canonicalized_path, triple, contents })
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}
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+ /// Creates a target triple from its alias
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+ pub fn from_alias(triple: String) -> Self {
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+ match triple.as_str() {
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+ "x86_64-pc-linux-gnu" => TargetTriple::from_triple("x86_64-unknown-linux-gnu"),
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+ "i686-pc-linux-gnu" => TargetTriple::from_triple("i686-unknown-linux-gnu"),
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+ _ => TargetTriple::TargetTriple(triple),
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+ }
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+ }
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+
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/// Returns a string triple for this target.
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///
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/// If this target is a path, the file name (without extension) is returned.
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diff --git a/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs
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index 3b7be48dbbc5..c23015e447ff 100644
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--- a/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs
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+++ b/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs
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@@ -9,7 +9,7 @@ pub fn target() -> Target {
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base.stack_probes = StackProbeType::Inline;
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Target {
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- llvm_target: "i686-unknown-linux-gnu".into(),
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+ llvm_target: "i686-pc-linux-gnu".into(),
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pointer_width: 32,
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data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
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f64:32:64-f80:32-n8:16:32-S128"
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diff --git a/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_gnu.rs
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index bf10f7e5d2de..c3f702f6df9e 100644
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--- a/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_gnu.rs
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+++ b/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_gnu.rs
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@@ -17,7 +17,7 @@ pub fn target() -> Target {
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base.supports_xray = true;
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Target {
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- llvm_target: "x86_64-unknown-linux-gnu".into(),
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+ llvm_target: "x86_64-pc-linux-gnu".into(),
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pointer_width: 64,
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data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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.into(),
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