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Rollup merge of #89025 - ricobbe:raw-dylib-link-ordinal, r=michaelwoerister

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Implement `#[link_ordinal(n)]`

Allows the use of `#[link_ordinal(n)]` with `#[link(kind = "raw-dylib")]`, allowing Rust to link against DLLs that export symbols by ordinal rather than by name.  As long as the ordinal matches, the name of the function in Rust is not required to match the name of the corresponding function in the exporting DLL.

Part of #58713.
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2021-10-07 20:26:11 -07:00
committed by GitHub
parent 2b6d7f75f7 142f6c0b07
commit 6c17601a2e
20 changed files with 201 additions and 23 deletions
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2
compiler/rustc_middle/src/middle/codegen_fn_attrs.rs
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@@ -22,7 +22,7 @@ pub struct CodegenFnAttrs {
/// imported function has in the dynamic library. Note that this must not
/// be set when `link_name` is set. This is for foreign items with the
/// "raw-dylib" kind.
pub link_ordinal: Option<usize>,
pub link_ordinal: Option<u16>,
/// The `#[target_feature(enable = "...")]` attribute and the enabled
/// features (only enabled features are supported right now).
pub target_features: Vec<Symbol>,