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Rollup merge of #108017 - chbaker0:fix-105967, r=chbaker0

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Add `--no-undefined-version` link flag and fix associated breakage

LLVM upstream sets `--no-undefined-version` by default in lld: https://reviews.llvm.org/D135402.

Due to a bug in how version scripts are generated, this breaks the `dylib` output type for most crates. See https://github.com/rust-lang/rust/issues/105967#issuecomment-1428671533 for details.

This PR adds the flag to gcc flavor linkers in anticipation of this LLVM change rolling in, and patches `rustc` to not attempt to export `__rust_*` allocator symbols when they weren't generated.

Fixes #105967
This commit is contained in:
Matthias Krüger 2023-03-10 21:15:45 +01:00 committed by GitHub
commit b23a3a36ed
1 changed files with 10 additions and 18 deletions
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28
src/allocator.rs
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@ -4,6 +4,7 @@
use crate::prelude::*;
use rustc_ast::expand::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
use rustc_codegen_ssa::base::allocator_kind_for_codegen;
use rustc_session::config::OomStrategy;
use rustc_span::symbol::sym;
@ -13,24 +14,15 @@ pub(crate) fn codegen(
module: &mut impl Module,
unwind_context: &mut UnwindContext,
) -> bool {
let any_dynamic_crate = tcx.dependency_formats(()).iter().any(|(_, list)| {
use rustc_middle::middle::dependency_format::Linkage;
list.iter().any(|&linkage| linkage == Linkage::Dynamic)
});
if any_dynamic_crate {
false
} else if let Some(kind) = tcx.allocator_kind(()) {
codegen_inner(
module,
unwind_context,
kind,
tcx.alloc_error_handler_kind(()).unwrap(),
tcx.sess.opts.unstable_opts.oom,
);
true
} else {
false
}
let Some(kind) = allocator_kind_for_codegen(tcx) else { return false };
codegen_inner(
module,
unwind_context,
kind,
tcx.alloc_error_handler_kind(()).unwrap(),
tcx.sess.opts.unstable_opts.oom,
);
true
}
fn codegen_inner(