From e87abdbf447ad5474ce81c5f11ffc9fa96740f98 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= <matthias.krueger@famsik.de>
Date: Thu, 8 Mar 2018 16:21:08 +0100
Subject: [PATCH] bootstrap: when we detect travis-ci or appveyor, use 16
 codegen-units when building stage0.

---
 src/bootstrap/builder.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index fab7a2b3fcc5c..34efca27f14f6 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -778,6 +778,12 @@ impl<'a> Builder<'a> {
             if cmd != "bench" {
                 cargo.arg("--release");
             }
+            if compiler.stage == 0 &&
+                (env::var_os("TRAVIS").is_some() || env::var_os("APPVEYOR").is_some()) {
+                // If we run on travis-ci or appveyor, build stage0 with
+                // several codegenunits for lower build times.
+                cargo.env("RUSTC_CODEGEN_UNITS", "16");
+            }
         }
 
         if self.config.locked_deps {