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Auto merge of #84171 - ricobbe:raw-dylib-via-llvm, r=petrochenkov

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Partial support for raw-dylib linkage

First cut of functionality for issue #58713: add support for `#[link(kind = "raw-dylib")]` on `extern` blocks in lib crates compiled to .rlib files.  Does not yet support `#[link_name]` attributes on functions, or the `#[link_ordinal]` attribute, or `#[link(kind = "raw-dylib")]` on `extern` blocks in bin crates; I intend to publish subsequent PRs to fill those gaps.  It's also not yet clear whether this works for functions in `extern "stdcall"` blocks; I also intend to investigate that shortly and make any necessary changes as a follow-on PR.

This implementation calls out to an LLVM function to construct the actual `.idata` sections as temporary `.lib` files on disk and then links those into the generated .rlib.
This commit is contained in:
bors 2021-06-06 03:59:17 +00:00
commit 9a576175cc
27 changed files with 481 additions and 20 deletions
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7
compiler/rustc_middle/src/middle/cstore.rs
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@ -95,6 +95,13 @@ pub struct NativeLib {
pub foreign_module: Option<DefId>,
pub wasm_import_module: Option<Symbol>,
pub verbatim: Option<bool>,
pub dll_imports: Vec<DllImport>,
}
#[derive(Clone, Debug, Encodable, Decodable, HashStable)]
pub struct DllImport {
pub name: Symbol,
pub ordinal: Option<u16>,
}
#[derive(Clone, TyEncodable, TyDecodable, HashStable, Debug)]