diff options
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/back/linker.rs | 10 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/middle/exported_symbols.rs | 3 |
2 files changed, 8 insertions, 5 deletions
diff --git a/compiler/rustc_codegen_ssa/src/back/linker.rs b/compiler/rustc_codegen_ssa/src/back/linker.rs index 3d8ff3fbf56..556aa4ed616 100644 --- a/compiler/rustc_codegen_ssa/src/back/linker.rs +++ b/compiler/rustc_codegen_ssa/src/back/linker.rs @@ -1882,11 +1882,11 @@ pub(crate) fn linked_symbols( // We really only need symbols from upstream rlibs to end up in the linked symbols list. // The rest are in separate object files which the linker will always link in and // doesn't have rules around the order in which they need to appear. - // When doing LTO, some of the symbols in the linked symbols list may end up getting - // internalized, which then prevents referencing them from symbols.o. When doing LTO, - // all object files that get linked in will be local object files rather than pulled in - // from rlibs, so an empty linked symbols list works fine to avoid referencing all those - // internalized symbols from symbols.o. + // When doing LTO, some of the symbols in the linked symbols list happen to be + // internalized by LTO, which then prevents referencing them from symbols.o. When doing + // LTO, all object files that get linked in will be local object files rather than + // pulled in from rlibs, so an empty linked symbols list works fine to avoid referencing + // all those internalized symbols from symbols.o. return Vec::new(); } } diff --git a/compiler/rustc_middle/src/middle/exported_symbols.rs b/compiler/rustc_middle/src/middle/exported_symbols.rs index 491bba98c19..c70ff398cea 100644 --- a/compiler/rustc_middle/src/middle/exported_symbols.rs +++ b/compiler/rustc_middle/src/middle/exported_symbols.rs @@ -31,6 +31,9 @@ pub enum SymbolExportKind { /// The `SymbolExportInfo` of a symbols specifies symbol-related information /// that is relevant to code generation and linking. +/// +/// The difference between `used` and `rustc_std_internal_symbol` is that the +/// former is exported by LTO while the latter isn't. #[derive(Eq, PartialEq, Debug, Copy, Clone, TyEncodable, TyDecodable, HashStable)] pub struct SymbolExportInfo { pub level: SymbolExportLevel, |