rustbuild: Compile with the build compiler

This switches the defaults to ensure that everything is built with the build
compiler rather than the host compiler itself (which we're not guaranteed to be
able to run)

diff --git a/src/bootstrap/build/step.rs b/src/bootstrap/build/step.rs
index d97bc064c984803828be549cb1cec46bd0bc63e1..acbfdca0b6d774e02a459b7034ae66fc25ccf6dc 100644 (file)
--- a/src/bootstrap/build/step.rs
+++ b/src/bootstrap/build/step.rs
@@ -93,13 +93,13 @@ fn top_level(build: &Build) -> Vec<Step> {
                 continue
             }
             let host = t.target(host);
-            targets.push(host.librustc(stage, host.compiler(stage)));
+            targets.push(host.librustc(stage, t.compiler(stage)));
             for target in build.config.target.iter() {
                 if !build.flags.target.contains(target) {
                     continue
                 }
                 targets.push(host.target(target)
-                                 .libstd(stage, host.compiler(stage)));
+                                 .libstd(stage, t.compiler(stage)));
             }
         }
     }