bootstrap: pass crt-static for the compiler host as well

Author: mixi

src/bootstrap/bin/rustc.rs

@@ -268,6 +268,15 @@ fn main() {
         if let Ok(host_linker) = env::var("RUSTC_HOST_LINKER") {
             cmd.arg(format!("-Clinker={}", host_linker));
         }
+
+        if let Ok(s) = env::var("RUSTC_HOST_CRT_STATIC") {
+            if s == "true" {
+                cmd.arg("-C").arg("target-feature=+crt-static");
+            }
+            if s == "false" {
+                cmd.arg("-C").arg("target-feature=-crt-static");
+            }
+        }
     }
 
     if env::var_os("RUSTC_PARALLEL_QUERIES").is_some() {

src/bootstrap/builder.rs

@@ -842,6 +842,10 @@ impl<'a> Builder<'a> {
             cargo.env("RUSTC_CRT_STATIC", x.to_string());
         }
 
+        if let Some(x) = self.crt_static(compiler.host) {
+            cargo.env("RUSTC_HOST_CRT_STATIC", x.to_string());
+        }
+
         // Enable usage of unstable features
         cargo.env("RUSTC_BOOTSTRAP", "1");
         self.add_rust_test_threads(&mut cargo);