From 0cdcefdcc7abfadd427bbf19f1ec9c048cf2e723 Mon Sep 17 00:00:00 2001
From: Bert Belder <bertbelder@gmail.com>
Date: Tue, 8 Jan 2019 19:17:27 +0100
Subject: [PATCH] build: bring rustc --cfg flag support back

---
 build_extra/rust/rust.gni | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/build_extra/rust/rust.gni b/build_extra/rust/rust.gni
index 61731d21c7..60b33d6105 100644
--- a/build_extra/rust/rust.gni
+++ b/build_extra/rust/rust.gni
@@ -45,6 +45,7 @@ template("rust_crate") {
 
   forward_variables_from(invoker,
                          [
+                           "cfg",
                            "crate_name",
                            "crate_type",
                            "crate_version",
@@ -214,6 +215,15 @@ template("rust_crate") {
       args += invoker.args
     }
 
+    if (defined(cfg)) {
+      foreach(c, cfg) {
+        args += [
+          "--cfg",
+          "c",
+        ]
+      }
+    }
+
     if (defined(features)) {
       foreach(f, features) {
         args += [