1# Copyright 2014 The Chromium Authors 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5import("//build/toolchain/rbe.gni") 6 7# Defines the configuration of cc wrapper 8# ccache, sccache: c/c++ compiler caches which can greatly reduce recompilation 9# times. 10# icecc, distcc: it takes compile jobs from a build and distributes them among 11# remote machines allowing a parallel build. 12# 13# TIPS 14# 15# 1) ccache 16# Set clang_use_chrome_plugins=false if using ccache 3.1.9 or earlier, since 17# these versions don't support -Xclang. (3.1.10 and later will silently 18# ignore -Xclang, so it doesn't matter if you disable clang_use_chrome_plugins 19# or not). 20# 21# Use ccache 3.2 or later to avoid clang unused argument warnings: 22# https://bugzilla.samba.org/show_bug.cgi?id=8118 23# 24# 2) icecc 25# Set clang_use_chrome_plugins=false because icecc cannot distribute custom 26# clang libraries. 27# 28# To use icecc and ccache together, set cc_wrapper = "ccache" with 29# export CCACHE_PREFIX=icecc 30 31declare_args() { 32 # Set to "ccache", "sccache", "icecc" or "distcc". 33 cc_wrapper = "" 34} 35 36assert(!use_remoteexec || cc_wrapper == "", 37 "use_remoteexec and cc_wrapper can not be used together.") 38