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| -rw-r--r-- | src/bootstrap/compile.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs index 7d94bac66f7..8cfd8559016 100644 --- a/src/bootstrap/compile.rs +++ b/src/bootstrap/compile.rs @@ -660,6 +660,16 @@ impl Step for CodegenBackend { builder.ensure(Rustc { compiler, target }); + if let Some(keep_stage) = builder.config.keep_stage { + if keep_stage <= compiler.stage { + println!("Warning: Using a potentially old codegen backend. \ + This may not behave well."); + // Codegen backends are linked separately from this step today, so we don't do + // anything here. + return; + } + } + if builder.force_use_stage1(compiler, target) { builder.ensure(CodegenBackend { compiler: builder.compiler(1, builder.config.build), |