From 6adf2585a1e070e38ab130e3a908bab3743b588e Mon Sep 17 00:00:00 2001
From: Yi Kong <yikong@google.com>
Date: Sun, 17 Apr 2022 15:01:06 +0800
Subject: [PATCH] Expose Clang wrapper's dump usage stats option

This allows us to track how much time is spent in Clang.

Test: TOOLCHAIN_RUSAGE_OUTPUT=/tmp/rusage.txt m
Change-Id: Ib2961904f363bc59bd9d928bb055a96740cb9f17
---
 ui/build/dumpvars.go | 3 +++
 ui/build/ninja.go    | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index 11311f997..285f1569b 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -205,6 +205,9 @@ func runMakeProductConfig(ctx Context, config Config) {
 		"CCACHE_SLOPPINESS",
 		"CCACHE_BASEDIR",
 		"CCACHE_CPP2",
+
+		// LLVM compiler wrapper options
+		"TOOLCHAIN_RUSAGE_OUTPUT",
 	}
 
 	allVars := append(append([]string{
diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index 41de6bd7e..dab1a9b58 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -169,6 +169,9 @@ func runNinjaForBuild(ctx Context, config Config) {
 			"CCACHE_BASEDIR",
 			"CCACHE_CPP2",
 			"CCACHE_DIR",
+
+			// LLVM compiler wrapper options
+			"TOOLCHAIN_RUSAGE_OUTPUT",
 		}, config.BuildBrokenNinjaUsesEnvVars()...)...)
 	}