Fix stage 2 builds with a custom libdir.

When copying libstd for the stage 2 compiler, the builder ignores the
configured libdir/libdir_relative configuration parameters.  This causes
the compiler to fail to find libstd, which cause any tools built with the
stage 2 compiler to fail.

To fix this, make the copy steps of rustbuild aware of the libdir_relative
parameter when the stage >= 2.  Also update the dist target to be aware of
the new location of libstd.

1 files changed, 8 insertions, 2 deletions

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 5a3785b1ed6..032231582ef 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -645,8 +645,14 @@ impl Build {
     /// Returns the libdir where the standard library and other artifacts are
     /// found for a compiler's sysroot.
     fn sysroot_libdir(&self, compiler: &Compiler, target: &str) -> PathBuf {
-        self.sysroot(compiler).join("lib").join("rustlib")
-            .join(target).join("lib")
+        if compiler.stage >= 2 {
+            if let Some(ref libdir_relative) = self.config.libdir_relative {
+                return self.sysroot(compiler).join(libdir_relative)
+                    .join("rustlib").join(target).join("lib")
+            }
+        }
+       self.sysroot(compiler).join("lib").join("rustlib")
+           .join(target).join("lib")
     }
 
     /// Returns the root directory for all output generated in a particular