Pass --target to lint docs

Otherwise, we may not have a standard library built for the native "host" target
of the rustc being run.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index f90e76a4f4e..cf9211bc7ea 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -752,6 +752,7 @@ impl Step for RustcBook {
         let out_listing = out_base.join("src/lints");
         builder.cp_r(&builder.src.join("src/doc/rustc"), &out_base);
         builder.info(&format!("Generating lint docs ({})", self.target));
+
         let rustc = builder.rustc(self.compiler);
         // The tool runs `rustc` for extracting output examples, so it needs a
         // functional sysroot.
@@ -762,7 +763,8 @@ impl Step for RustcBook {
         cmd.arg("--out");
         cmd.arg(&out_listing);
         cmd.arg("--rustc");
-        cmd.arg(rustc);
+        cmd.arg(&rustc);
+        cmd.arg("--rustc-target").arg(&self.target.rustc_target_arg());
         if builder.config.verbose() {
             cmd.arg("--verbose");
         }