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Add primary marker on codegen unit to take charge of main_wrapper for non-local cases.

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This commit is contained in:
Charles Lew 2021-04-24 13:16:34 +08:00
parent 49920bc581
commit 89a67051a7
5 changed files with 20 additions and 31 deletions
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17
compiler/rustc_codegen_ssa/src/base.rs
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@ -357,20 +357,9 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
if !cx.codegen_unit().contains_item(&MonoItem::Fn(instance)) {
return None;
}
} else {
// FIXME: Add support for non-local main fn codegen
let span = cx.tcx().main_def.unwrap().span;
let n = 28937;
cx.sess()
.struct_span_err(span, "entry symbol `main` from foreign crate is not yet supported.")
.note(&format!(
"see issue #{} <https://github.com/rust-lang/rust/issues/{}> \
for more information",
n, n,
))
.emit();
cx.sess().abort_if_errors();
bug!();
} else if !cx.codegen_unit().is_primary() {
// We want to create the wrapper only when the codegen unit is the primary one
return None;
}
let main_llfn = cx.get_fn_addr(instance);