cc_wrapper.gni - mozsearch

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# Copyright (c) 2014 The Chromium Authors. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file.

import("//chromium/build/toolchain/goma.gni")

import("//chromium/build/toolchain/rbe.gni")

# Defines the configuration of cc wrapper

# ccache: a c/c++ compiler cache which can greatly reduce recompilation times.

# icecc, distcc: it takes compile jobs from a build and distributes them among

#                remote machines allowing a parallel build.

# TIPS

# 1) ccache

# Set clang_use_chrome_plugins=false if using ccache 3.1.9 or earlier, since

# these versions don't support -Xclang.  (3.1.10 and later will silently

# ignore -Xclang, so it doesn't matter if you disable clang_use_chrome_plugins

# or not).

# Use ccache 3.2 or later to avoid clang unused argument warnings:

# https://bugzilla.samba.org/show_bug.cgi?id=8118

# To avoid -Wparentheses-equality clang warnings, at some cost in terms of

# speed, you can do:

# export CCACHE_CPP2=yes

# 2) icecc

# Set clang_use_chrome_plugins=false because icecc cannot distribute custom

# clang libraries.

# To use icecc and ccache together, set cc_wrapper = "ccache" with

# export CCACHE_PREFIX=icecc

declare_args() {

  # Set to "ccache", "icecc" or "distcc".  Probably doesn't work on windows.

  cc_wrapper = ""

assert(!use_goma || cc_wrapper == "",

       "use_goma and cc_wrapper can not be used together.")

assert(!use_remoteexec || cc_wrapper == "",

       "use_remoteexec and cc_wrapper can not be used together.")