From 7706f36d0d5a844655e67cb89d532fc62daecde1 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 31 Jul 2019 17:55:33 +0200
Subject: [PATCH] rustc: Enable profiling support

This matches the upstream binary releases (see
https://github.com/rust-lang/rust/blob/beta/src/ci/docker/x86_64-gnu/Dockerfile).

Upstream also enables sanitizer support but that adds another 39 MiB
to the package size, and who needs sanitizers in Rust anyway ;-)
---
 pkgs/development/compilers/rust/rustc.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 615e71984b6..d7776958390 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -86,6 +86,8 @@ in stdenv.mkDerivation rec {
     "${setBuild}.llvm-config=${llvmSharedForBuild}/bin/llvm-config"
     "${setHost}.llvm-config=${llvmSharedForHost}/bin/llvm-config"
     "${setTarget}.llvm-config=${llvmSharedForTarget}/bin/llvm-config"
+  ] ++ optional stdenv.isLinux [
+    "--enable-profiler" # build libprofiler_builtins
   ];
 
   # The bootstrap.py will generated a Makefile that then executes the build.