1#!/usr/bin/env bash 2# Copyright 2017 Google Inc. 3# All Rights Reserved. 4# 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions are 8# met: 9# 10# * Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# * Redistributions in binary form must reproduce the above 13# copyright notice, this list of conditions and the following disclaimer 14# in the documentation and/or other materials provided with the 15# distribution. 16# * Neither the name of Google Inc. nor the names of its 17# contributors may be used to endorse or promote products derived from 18# this software without specific prior written permission. 19# 20# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 32# This file is typically sourced by another script. 33# if possible, ask for the precise number of processors, 34# otherwise take 2 processors as reasonable default; see 35# https://docs.travis-ci.com/user/speeding-up-the-build/#Makefile-optimization 36if [ -x /usr/bin/getconf ]; then 37 NPROCESSORS=$(/usr/bin/getconf _NPROCESSORS_ONLN) 38else 39 NPROCESSORS=2 40fi 41 42# as of 2017-09-04 Travis CI reports 32 processors, but GCC build 43# crashes if parallelized too much (maybe memory consumption problem), 44# so limit to 4 processors for the time being. 45if [ $NPROCESSORS -gt 4 ] ; then 46 echo "$0:Note: Limiting processors to use by make from $NPROCESSORS to 4." 47 NPROCESSORS=4 48fi 49