SConstruct revision 12485
1955SN/A# -*- mode:python -*- 2955SN/A 35871Snate@binkert.org# Copyright (c) 2013, 2015-2017 ARM Limited 41762SN/A# All rights reserved. 5955SN/A# 6955SN/A# The license below extends only to copyright in the software and shall 7955SN/A# not be construed as granting a license to any other intellectual 8955SN/A# property including but not limited to intellectual property relating 9955SN/A# to a hardware implementation of the functionality of the software 10955SN/A# licensed hereunder. You may use the software subject to the license 11955SN/A# terms below provided that you ensure that this notice is replicated 12955SN/A# unmodified and in its entirety in all distributions of the software, 13955SN/A# modified or unmodified, in source code or in binary form. 14955SN/A# 15955SN/A# Copyright (c) 2011 Advanced Micro Devices, Inc. 16955SN/A# Copyright (c) 2009 The Hewlett-Packard Development Company 17955SN/A# Copyright (c) 2004-2005 The Regents of The University of Michigan 18955SN/A# All rights reserved. 19955SN/A# 20955SN/A# Redistribution and use in source and binary forms, with or without 21955SN/A# modification, are permitted provided that the following conditions are 22955SN/A# met: redistributions of source code must retain the above copyright 23955SN/A# notice, this list of conditions and the following disclaimer; 24955SN/A# redistributions in binary form must reproduce the above copyright 25955SN/A# notice, this list of conditions and the following disclaimer in the 26955SN/A# documentation and/or other materials provided with the distribution; 27955SN/A# neither the name of the copyright holders nor the names of its 28955SN/A# contributors may be used to endorse or promote products derived from 292665Ssaidi@eecs.umich.edu# this software without specific prior written permission. 302665Ssaidi@eecs.umich.edu# 315863Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32955SN/A# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33955SN/A# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 34955SN/A# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35955SN/A# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 36955SN/A# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 372632Sstever@eecs.umich.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 382632Sstever@eecs.umich.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 392632Sstever@eecs.umich.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 402632Sstever@eecs.umich.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 41955SN/A# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 422632Sstever@eecs.umich.edu# 432632Sstever@eecs.umich.edu# Authors: Steve Reinhardt 442761Sstever@eecs.umich.edu# Nathan Binkert 452632Sstever@eecs.umich.edu 462632Sstever@eecs.umich.edu################################################### 472632Sstever@eecs.umich.edu# 482761Sstever@eecs.umich.edu# SCons top-level build description (SConstruct) file. 492761Sstever@eecs.umich.edu# 502761Sstever@eecs.umich.edu# While in this directory ('gem5'), just type 'scons' to build the default 512632Sstever@eecs.umich.edu# configuration (see below), or type 'scons build/<CONFIG>/<binary>' 522632Sstever@eecs.umich.edu# to build some other configuration (e.g., 'build/ALPHA/gem5.opt' for 532761Sstever@eecs.umich.edu# the optimized full-system version). 542761Sstever@eecs.umich.edu# 552761Sstever@eecs.umich.edu# You can build gem5 in a different directory as long as there is a 562761Sstever@eecs.umich.edu# 'build/<CONFIG>' somewhere along the target path. The build system 572761Sstever@eecs.umich.edu# expects that all configs under the same build directory are being 582632Sstever@eecs.umich.edu# built for the same host system. 592632Sstever@eecs.umich.edu# 602632Sstever@eecs.umich.edu# Examples: 612632Sstever@eecs.umich.edu# 622632Sstever@eecs.umich.edu# The following two commands are equivalent. The '-u' option tells 632632Sstever@eecs.umich.edu# scons to search up the directory tree for this SConstruct file. 642632Sstever@eecs.umich.edu# % cd <path-to-src>/gem5 ; scons build/ALPHA/gem5.debug 65955SN/A# % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.debug 66955SN/A# 67955SN/A# The following two commands are equivalent and demonstrate building 685863Snate@binkert.org# in a directory outside of the source tree. The '-C' option tells 695863Snate@binkert.org# scons to chdir to the specified directory to find this SConstruct 705863Snate@binkert.org# file. 715863Snate@binkert.org# % cd <path-to-src>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug 725863Snate@binkert.org# % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug 735863Snate@binkert.org# 745863Snate@binkert.org# You can use 'scons -H' to print scons options. If you're in this 755863Snate@binkert.org# 'gem5' directory (or use -u or -C to tell scons where to find this 765863Snate@binkert.org# file), you can use 'scons -h' to print all the gem5-specific build 775863Snate@binkert.org# options as well. 785863Snate@binkert.org# 795863Snate@binkert.org################################################### 805863Snate@binkert.org 815863Snate@binkert.org# Global Python includes 825863Snate@binkert.orgimport itertools 835863Snate@binkert.orgimport os 845863Snate@binkert.orgimport re 855863Snate@binkert.orgimport shutil 865863Snate@binkert.orgimport subprocess 875863Snate@binkert.orgimport sys 885863Snate@binkert.org 895863Snate@binkert.orgfrom os import mkdir, environ 905863Snate@binkert.orgfrom os.path import abspath, basename, dirname, expanduser, normpath 915863Snate@binkert.orgfrom os.path import exists, isdir, isfile 925863Snate@binkert.orgfrom os.path import join as joinpath, split as splitpath 935863Snate@binkert.org 945863Snate@binkert.org# SCons includes 955863Snate@binkert.orgimport SCons 965863Snate@binkert.orgimport SCons.Node 975863Snate@binkert.org 985863Snate@binkert.orgfrom m5.util import compareVersions, readCommand 99955SN/A 1005396Ssaidi@eecs.umich.eduhelp_texts = { 1015863Snate@binkert.org "options" : "", 1025863Snate@binkert.org "global_vars" : "", 1034202Sbinkertn@umich.edu "local_vars" : "" 1045863Snate@binkert.org} 1055863Snate@binkert.org 1065863Snate@binkert.orgExport("help_texts") 1075863Snate@binkert.org 108955SN/A 1095273Sstever@gmail.com# There's a bug in scons in that (1) by default, the help texts from 1105871Snate@binkert.org# AddOption() are supposed to be displayed when you type 'scons -h' 1115273Sstever@gmail.com# and (2) you can override the help displayed by 'scons -h' using the 1125871Snate@binkert.org# Help() function, but these two features are incompatible: once 1135863Snate@binkert.org# you've overridden the help text using Help(), there's no way to get 1145863Snate@binkert.org# at the help texts from AddOptions. See: 1155863Snate@binkert.org# http://scons.tigris.org/issues/show_bug.cgi?id=2356 1165871Snate@binkert.org# http://scons.tigris.org/issues/show_bug.cgi?id=2611 1175872Snate@binkert.org# This hack lets us extract the help text from AddOptions and 1185872Snate@binkert.org# re-inject it via Help(). Ideally someday this bug will be fixed and 1195872Snate@binkert.org# we can just use AddOption directly. 1205871Snate@binkert.orgdef AddLocalOption(*args, **kwargs): 1215871Snate@binkert.org col_width = 30 1225871Snate@binkert.org 1235871Snate@binkert.org help = " " + ", ".join(args) 1245871Snate@binkert.org if "help" in kwargs: 1255871Snate@binkert.org length = len(help) 1265871Snate@binkert.org if length >= col_width: 1275871Snate@binkert.org help += "\n" + " " * col_width 1285871Snate@binkert.org else: 1295871Snate@binkert.org help += " " * (col_width - length) 1305871Snate@binkert.org help += kwargs["help"] 1315871Snate@binkert.org help_texts["options"] += help + "\n" 1325871Snate@binkert.org 1335871Snate@binkert.org AddOption(*args, **kwargs) 1345863Snate@binkert.org 1355227Ssaidi@eecs.umich.eduAddLocalOption('--colors', dest='use_colors', action='store_true', 1365396Ssaidi@eecs.umich.edu help="Add color to abbreviated scons output") 1375396Ssaidi@eecs.umich.eduAddLocalOption('--no-colors', dest='use_colors', action='store_false', 1385396Ssaidi@eecs.umich.edu help="Don't add color to abbreviated scons output") 1395396Ssaidi@eecs.umich.eduAddLocalOption('--with-cxx-config', dest='with_cxx_config', 1405396Ssaidi@eecs.umich.edu action='store_true', 1415396Ssaidi@eecs.umich.edu help="Build with support for C++-based configuration") 1425396Ssaidi@eecs.umich.eduAddLocalOption('--default', dest='default', type='string', action='store', 1435396Ssaidi@eecs.umich.edu help='Override which build_opts file to use for defaults') 1445588Ssaidi@eecs.umich.eduAddLocalOption('--ignore-style', dest='ignore_style', action='store_true', 1455396Ssaidi@eecs.umich.edu help='Disable style checking hooks') 1465396Ssaidi@eecs.umich.eduAddLocalOption('--no-lto', dest='no_lto', action='store_true', 1475396Ssaidi@eecs.umich.edu help='Disable Link-Time Optimization for fast') 1485396Ssaidi@eecs.umich.eduAddLocalOption('--force-lto', dest='force_lto', action='store_true', 1495396Ssaidi@eecs.umich.edu help='Use Link-Time Optimization instead of partial linking' + 1505396Ssaidi@eecs.umich.edu ' when the compiler doesn\'t support using them together.') 1515396Ssaidi@eecs.umich.eduAddLocalOption('--update-ref', dest='update_ref', action='store_true', 1525396Ssaidi@eecs.umich.edu help='Update test reference outputs') 1535396Ssaidi@eecs.umich.eduAddLocalOption('--verbose', dest='verbose', action='store_true', 1545396Ssaidi@eecs.umich.edu help='Print full tool command lines') 1555396Ssaidi@eecs.umich.eduAddLocalOption('--without-python', dest='without_python', 1565396Ssaidi@eecs.umich.edu action='store_true', 1575396Ssaidi@eecs.umich.edu help='Build without Python configuration support') 1585396Ssaidi@eecs.umich.eduAddLocalOption('--without-tcmalloc', dest='without_tcmalloc', 1595871Snate@binkert.org action='store_true', 1605871Snate@binkert.org help='Disable linking against tcmalloc') 1615871Snate@binkert.orgAddLocalOption('--with-ubsan', dest='with_ubsan', action='store_true', 1625871Snate@binkert.org help='Build with Undefined Behavior Sanitizer if available') 1635871Snate@binkert.orgAddLocalOption('--with-asan', dest='with_asan', action='store_true', 1646003Snate@binkert.org help='Build with Address Sanitizer if available') 1656003Snate@binkert.org 166955SN/Aif GetOption('no_lto') and GetOption('force_lto'): 1675871Snate@binkert.org print '--no-lto and --force-lto are mutually exclusive' 1685871Snate@binkert.org Exit(1) 1695871Snate@binkert.org 1705871Snate@binkert.org######################################################################## 171955SN/A# 1725871Snate@binkert.org# Set up the main build environment. 1735871Snate@binkert.org# 1745871Snate@binkert.org######################################################################## 1751533SN/A 1765871Snate@binkert.orgmain = Environment() 1775871Snate@binkert.org 1785863Snate@binkert.orgfrom gem5_scons import Transform 1795871Snate@binkert.orgfrom gem5_scons.util import get_termcap 1805871Snate@binkert.orgtermcap = get_termcap() 1815871Snate@binkert.org 1825871Snate@binkert.orgmain_dict_keys = main.Dictionary().keys() 1835871Snate@binkert.org 1845863Snate@binkert.org# Check that we have a C/C++ compiler 1855871Snate@binkert.orgif not ('CC' in main_dict_keys and 'CXX' in main_dict_keys): 1865863Snate@binkert.org print "No C++ compiler installed (package g++ on Ubuntu and RedHat)" 1875871Snate@binkert.org Exit(1) 1884678Snate@binkert.org 1894678Snate@binkert.org################################################### 1904678Snate@binkert.org# 1914678Snate@binkert.org# Figure out which configurations to set up based on the path(s) of 1924678Snate@binkert.org# the target(s). 1934678Snate@binkert.org# 1944678Snate@binkert.org################################################### 1954678Snate@binkert.org 1964678Snate@binkert.org# Find default configuration & binary. 1974678Snate@binkert.orgDefault(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug')) 1984678Snate@binkert.org 1994678Snate@binkert.org# helper function: find last occurrence of element in list 2005871Snate@binkert.orgdef rfind(l, elt, offs = -1): 2014678Snate@binkert.org for i in range(len(l)+offs, 0, -1): 2025871Snate@binkert.org if l[i] == elt: 2035871Snate@binkert.org return i 2045871Snate@binkert.org raise ValueError, "element not found" 2055871Snate@binkert.org 2065871Snate@binkert.org# Take a list of paths (or SCons Nodes) and return a list with all 2075871Snate@binkert.org# paths made absolute and ~-expanded. Paths will be interpreted 2085871Snate@binkert.org# relative to the launch directory unless a different root is provided 2095871Snate@binkert.orgdef makePathListAbsolute(path_list, root=GetLaunchDir()): 2105871Snate@binkert.org return [abspath(joinpath(root, expanduser(str(p)))) 2115871Snate@binkert.org for p in path_list] 2125871Snate@binkert.org 2135871Snate@binkert.org# Each target must have 'build' in the interior of the path; the 2145871Snate@binkert.org# directory below this will determine the build parameters. For 2155990Ssaidi@eecs.umich.edu# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we 2165871Snate@binkert.org# recognize that ALPHA_SE specifies the configuration because it 2175871Snate@binkert.org# follow 'build' in the build path. 2185871Snate@binkert.org 2194678Snate@binkert.org# The funky assignment to "[:]" is needed to replace the list contents 2205871Snate@binkert.org# in place rather than reassign the symbol to a new list, which 2215871Snate@binkert.org# doesn't work (obviously!). 2225871Snate@binkert.orgBUILD_TARGETS[:] = makePathListAbsolute(BUILD_TARGETS) 2235871Snate@binkert.org 2245871Snate@binkert.org# Generate a list of the unique build roots and configs that the 2255871Snate@binkert.org# collected targets reference. 2265871Snate@binkert.orgvariant_paths = [] 2275871Snate@binkert.orgbuild_root = None 2285871Snate@binkert.orgfor t in BUILD_TARGETS: 2295871Snate@binkert.org path_dirs = t.split('/') 2304678Snate@binkert.org try: 2315871Snate@binkert.org build_top = rfind(path_dirs, 'build', -2) 2324678Snate@binkert.org except: 2335871Snate@binkert.org print "Error: no non-leaf 'build' dir found on target path", t 2345871Snate@binkert.org Exit(1) 2355871Snate@binkert.org this_build_root = joinpath('/',*path_dirs[:build_top+1]) 2365871Snate@binkert.org if not build_root: 2375871Snate@binkert.org build_root = this_build_root 2385871Snate@binkert.org else: 2395871Snate@binkert.org if this_build_root != build_root: 2405871Snate@binkert.org print "Error: build targets not under same build root\n"\ 2415871Snate@binkert.org " %s\n %s" % (build_root, this_build_root) 2425990Ssaidi@eecs.umich.edu Exit(1) 2435863Snate@binkert.org variant_path = joinpath('/',*path_dirs[:build_top+2]) 244955SN/A if variant_path not in variant_paths: 245955SN/A variant_paths.append(variant_path) 2462632Sstever@eecs.umich.edu 2472632Sstever@eecs.umich.edu# Make sure build_root exists (might not if this is the first build there) 248955SN/Aif not isdir(build_root): 249955SN/A mkdir(build_root) 250955SN/Amain['BUILDROOT'] = build_root 251955SN/A 2525863Snate@binkert.orgExport('main') 253955SN/A 2542632Sstever@eecs.umich.edumain.SConsignFile(joinpath(build_root, "sconsign")) 2552632Sstever@eecs.umich.edu 2562632Sstever@eecs.umich.edu# Default duplicate option is to use hard links, but this messes up 2572632Sstever@eecs.umich.edu# when you use emacs to edit a file in the target dir, as emacs moves 2582632Sstever@eecs.umich.edu# file to file~ then copies to file, breaking the link. Symbolic 2592632Sstever@eecs.umich.edu# (soft) links work better. 2602632Sstever@eecs.umich.edumain.SetOption('duplicate', 'soft-copy') 2612632Sstever@eecs.umich.edu 2622632Sstever@eecs.umich.edu# 2632632Sstever@eecs.umich.edu# Set up global sticky variables... these are common to an entire build 2642632Sstever@eecs.umich.edu# tree (not specific to a particular build like ALPHA_SE) 2652632Sstever@eecs.umich.edu# 2662632Sstever@eecs.umich.edu 2673718Sstever@eecs.umich.eduglobal_vars_file = joinpath(build_root, 'variables.global') 2683718Sstever@eecs.umich.edu 2693718Sstever@eecs.umich.eduglobal_vars = Variables(global_vars_file, args=ARGUMENTS) 2703718Sstever@eecs.umich.edu 2713718Sstever@eecs.umich.eduglobal_vars.AddVariables( 2725863Snate@binkert.org ('CC', 'C compiler', environ.get('CC', main['CC'])), 2735863Snate@binkert.org ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])), 2743718Sstever@eecs.umich.edu ('PROTOC', 'protoc tool', environ.get('PROTOC', 'protoc')), 2753718Sstever@eecs.umich.edu ('BATCH', 'Use batch pool for build and tests', False), 2765863Snate@binkert.org ('BATCH_CMD', 'Batch pool submission command name', 'qdo'), 2775863Snate@binkert.org ('M5_BUILD_CACHE', 'Cache built objects in this directory', False), 2783718Sstever@eecs.umich.edu ('EXTRAS', 'Add extra directories to the compilation', '') 2793718Sstever@eecs.umich.edu ) 2802634Sstever@eecs.umich.edu 2812634Sstever@eecs.umich.edu# Update main environment with values from ARGUMENTS & global_vars_file 2825863Snate@binkert.orgglobal_vars.Update(main) 2832638Sstever@eecs.umich.eduhelp_texts["global_vars"] += global_vars.GenerateHelpText(main) 2842632Sstever@eecs.umich.edu 2852632Sstever@eecs.umich.edu# Save sticky variable settings back to current variables file 2862632Sstever@eecs.umich.eduglobal_vars.Save(global_vars_file, main) 2872632Sstever@eecs.umich.edu 2882632Sstever@eecs.umich.edu# Parse EXTRAS variable to build list of all directories where we're 2892632Sstever@eecs.umich.edu# look for sources etc. This list is exported as extras_dir_list. 2901858SN/Abase_dir = main.srcdir.abspath 2913716Sstever@eecs.umich.eduif main['EXTRAS']: 2922638Sstever@eecs.umich.edu extras_dir_list = makePathListAbsolute(main['EXTRAS'].split(':')) 2932638Sstever@eecs.umich.eduelse: 2942638Sstever@eecs.umich.edu extras_dir_list = [] 2952638Sstever@eecs.umich.edu 2962638Sstever@eecs.umich.eduExport('base_dir') 2972638Sstever@eecs.umich.eduExport('extras_dir_list') 2982638Sstever@eecs.umich.edu 2995863Snate@binkert.org# the ext directory should be on the #includes path 3005863Snate@binkert.orgmain.Append(CPPPATH=[Dir('ext')]) 3015863Snate@binkert.org 302955SN/A# Add shared top-level headers 3035341Sstever@gmail.commain.Prepend(CPPPATH=Dir('include')) 3045341Sstever@gmail.com 3055863Snate@binkert.orgif GetOption('verbose'): 3065341Sstever@gmail.com def MakeAction(action, string, *args, **kwargs): 3074494Ssaidi@eecs.umich.edu return Action(action, *args, **kwargs) 3084494Ssaidi@eecs.umich.eduelse: 3095863Snate@binkert.org MakeAction = Action 3101105SN/A main['CCCOMSTR'] = Transform("CC") 3112667Sstever@eecs.umich.edu main['CXXCOMSTR'] = Transform("CXX") 3122667Sstever@eecs.umich.edu main['ASCOMSTR'] = Transform("AS") 3132667Sstever@eecs.umich.edu main['ARCOMSTR'] = Transform("AR", 0) 3142667Sstever@eecs.umich.edu main['LINKCOMSTR'] = Transform("LINK", 0) 3152667Sstever@eecs.umich.edu main['SHLINKCOMSTR'] = Transform("SHLINK", 0) 3162667Sstever@eecs.umich.edu main['RANLIBCOMSTR'] = Transform("RANLIB", 0) 3175341Sstever@gmail.com main['M4COMSTR'] = Transform("M4") 3185863Snate@binkert.org main['SHCCCOMSTR'] = Transform("SHCC") 3195341Sstever@gmail.com main['SHCXXCOMSTR'] = Transform("SHCXX") 3205341Sstever@gmail.comExport('MakeAction') 3215341Sstever@gmail.com 3225863Snate@binkert.org# Initialize the Link-Time Optimization (LTO) flags 3235341Sstever@gmail.commain['LTO_CCFLAGS'] = [] 3245341Sstever@gmail.commain['LTO_LDFLAGS'] = [] 3255341Sstever@gmail.com 3265863Snate@binkert.org# According to the readme, tcmalloc works best if the compiler doesn't 3275341Sstever@gmail.com# assume that we're using the builtin malloc and friends. These flags 3285341Sstever@gmail.com# are compiler-specific, so we need to set them after we detect which 3295341Sstever@gmail.com# compiler we're using. 3305341Sstever@gmail.commain['TCMALLOC_CCFLAGS'] = [] 3315341Sstever@gmail.com 3325341Sstever@gmail.comCXX_version = readCommand([main['CXX'],'--version'], exception=False) 3335341Sstever@gmail.comCXX_V = readCommand([main['CXX'],'-V'], exception=False) 3345341Sstever@gmail.com 3355341Sstever@gmail.commain['GCC'] = CXX_version and CXX_version.find('g++') >= 0 3365341Sstever@gmail.commain['CLANG'] = CXX_version and CXX_version.find('clang') >= 0 3375863Snate@binkert.orgif main['GCC'] + main['CLANG'] > 1: 3385341Sstever@gmail.com print 'Error: How can we have two at the same time?' 3395863Snate@binkert.org Exit(1) 3405341Sstever@gmail.com 3415863Snate@binkert.org# Set up default C++ compiler flags 3425863Snate@binkert.orgif main['GCC'] or main['CLANG']: 3435863Snate@binkert.org # As gcc and clang share many flags, do the common parts here 3445397Ssaidi@eecs.umich.edu main.Append(CCFLAGS=['-pipe']) 3455397Ssaidi@eecs.umich.edu main.Append(CCFLAGS=['-fno-strict-aliasing']) 3465341Sstever@gmail.com # Enable -Wall and -Wextra and then disable the few warnings that 3475341Sstever@gmail.com # we consistently violate 3485341Sstever@gmail.com main.Append(CCFLAGS=['-Wall', '-Wundef', '-Wextra', 3495341Sstever@gmail.com '-Wno-sign-compare', '-Wno-unused-parameter']) 3505341Sstever@gmail.com # We always compile using C++11 3515341Sstever@gmail.com main.Append(CXXFLAGS=['-std=c++11']) 3525341Sstever@gmail.com if sys.platform.startswith('freebsd'): 3535341Sstever@gmail.com main.Append(CCFLAGS=['-I/usr/local/include']) 3545863Snate@binkert.org main.Append(CXXFLAGS=['-I/usr/local/include']) 3555341Sstever@gmail.com 3565341Sstever@gmail.com main['FILTER_PSHLINKFLAGS'] = lambda x: str(x).replace(' -shared', '') 3575863Snate@binkert.org main['PSHLINKFLAGS'] = main.subst('${FILTER_PSHLINKFLAGS(SHLINKFLAGS)}') 3585341Sstever@gmail.com main['PLINKFLAGS'] = main.subst('${LINKFLAGS}') 3595863Snate@binkert.org shared_partial_flags = ['-r', '-nostdlib'] 3605863Snate@binkert.org main.Append(PSHLINKFLAGS=shared_partial_flags) 3615341Sstever@gmail.com main.Append(PLINKFLAGS=shared_partial_flags) 3625863Snate@binkert.org 3635863Snate@binkert.org # Treat warnings as errors but white list some warnings that we 3645341Sstever@gmail.com # want to allow (e.g., deprecation warnings). 3655863Snate@binkert.org main.Append(CCFLAGS=['-Werror', 3665341Sstever@gmail.com '-Wno-error=deprecated-declarations', 3675871Snate@binkert.org '-Wno-error=deprecated', 3685341Sstever@gmail.com ]) 3695742Snate@binkert.orgelse: 3705742Snate@binkert.org print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, 3715742Snate@binkert.org print "Don't know what compiler options to use for your compiler." 3725341Sstever@gmail.com print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX'] 3735742Snate@binkert.org print termcap.Yellow + ' version:' + termcap.Normal, 3745742Snate@binkert.org if not CXX_version: 3755341Sstever@gmail.com print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\ 3766017Snate@binkert.org termcap.Normal 3776017Snate@binkert.org else: 3786017Snate@binkert.org print CXX_version.replace('\n', '<nl>') 3792632Sstever@eecs.umich.edu print " If you're trying to use a compiler other than GCC" 3806016Snate@binkert.org print " or clang, there appears to be something wrong with your" 3815871Snate@binkert.org print " environment." 3825871Snate@binkert.org print " " 3835871Snate@binkert.org print " If you are trying to use a compiler other than those listed" 3845871Snate@binkert.org print " above you will need to ease fix SConstruct and " 3855871Snate@binkert.org print " src/SConscript to support that compiler." 3865871Snate@binkert.org Exit(1) 3875871Snate@binkert.org 3883942Ssaidi@eecs.umich.eduif main['GCC']: 3893940Ssaidi@eecs.umich.edu # Check for a supported version of gcc. >= 4.8 is chosen for its 3903918Ssaidi@eecs.umich.edu # level of c++11 support. See 3913918Ssaidi@eecs.umich.edu # http://gcc.gnu.org/projects/cxx0x.html for details. 3921858SN/A gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False) 3933918Ssaidi@eecs.umich.edu if compareVersions(gcc_version, "4.8") < 0: 3943918Ssaidi@eecs.umich.edu print 'Error: gcc version 4.8 or newer required.' 3953918Ssaidi@eecs.umich.edu print ' Installed version:', gcc_version 3963918Ssaidi@eecs.umich.edu Exit(1) 3975571Snate@binkert.org 3983940Ssaidi@eecs.umich.edu main['GCC_VERSION'] = gcc_version 3993940Ssaidi@eecs.umich.edu 4003918Ssaidi@eecs.umich.edu if compareVersions(gcc_version, '4.9') >= 0: 4013918Ssaidi@eecs.umich.edu # Incremental linking with LTO is currently broken in gcc versions 4023918Ssaidi@eecs.umich.edu # 4.9 and above. A version where everything works completely hasn't 4033918Ssaidi@eecs.umich.edu # yet been identified. 4043918Ssaidi@eecs.umich.edu # 4053918Ssaidi@eecs.umich.edu # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67548 4065871Snate@binkert.org main['BROKEN_INCREMENTAL_LTO'] = True 4073918Ssaidi@eecs.umich.edu if compareVersions(gcc_version, '6.0') >= 0: 4083918Ssaidi@eecs.umich.edu # gcc versions 6.0 and greater accept an -flinker-output flag which 4093940Ssaidi@eecs.umich.edu # selects what type of output the linker should generate. This is 4103918Ssaidi@eecs.umich.edu # necessary for incremental lto to work, but is also broken in 4113918Ssaidi@eecs.umich.edu # current versions of gcc. It may not be necessary in future 4125397Ssaidi@eecs.umich.edu # versions. We add it here since it might be, and as a reminder that 4135397Ssaidi@eecs.umich.edu # it exists. It's excluded if lto is being forced. 4145397Ssaidi@eecs.umich.edu # 4155708Ssaidi@eecs.umich.edu # https://gcc.gnu.org/gcc-6/changes.html 4165708Ssaidi@eecs.umich.edu # https://gcc.gnu.org/ml/gcc-patches/2015-11/msg03161.html 4175708Ssaidi@eecs.umich.edu # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69866 4185708Ssaidi@eecs.umich.edu if not GetOption('force_lto'): 4195708Ssaidi@eecs.umich.edu main.Append(PSHLINKFLAGS='-flinker-output=rel') 4205397Ssaidi@eecs.umich.edu main.Append(PLINKFLAGS='-flinker-output=rel') 4211851SN/A 4221851SN/A # gcc from version 4.8 and above generates "rep; ret" instructions 4231858SN/A # to avoid performance penalties on certain AMD chips. Older 424955SN/A # assemblers detect this as an error, "Error: expecting string 4253053Sstever@eecs.umich.edu # instruction after `rep'" 4263053Sstever@eecs.umich.edu as_version_raw = readCommand([main['AS'], '-v', '/dev/null', 4273053Sstever@eecs.umich.edu '-o', '/dev/null'], 4283053Sstever@eecs.umich.edu exception=False).split() 4293053Sstever@eecs.umich.edu 4303053Sstever@eecs.umich.edu # version strings may contain extra distro-specific 4313053Sstever@eecs.umich.edu # qualifiers, so play it safe and keep only what comes before 4325871Snate@binkert.org # the first hyphen 4333053Sstever@eecs.umich.edu as_version = as_version_raw[-1].split('-')[0] if as_version_raw else None 4344742Sstever@eecs.umich.edu 4354742Sstever@eecs.umich.edu if not as_version or compareVersions(as_version, "2.23") < 0: 4363053Sstever@eecs.umich.edu print termcap.Yellow + termcap.Bold + \ 4373053Sstever@eecs.umich.edu 'Warning: This combination of gcc and binutils have' + \ 4383053Sstever@eecs.umich.edu ' known incompatibilities.\n' + \ 4393053Sstever@eecs.umich.edu ' If you encounter build problems, please update ' + \ 4403053Sstever@eecs.umich.edu 'binutils to 2.23.' + \ 4413053Sstever@eecs.umich.edu termcap.Normal 4423053Sstever@eecs.umich.edu 4433053Sstever@eecs.umich.edu # Make sure we warn if the user has requested to compile with the 4443053Sstever@eecs.umich.edu # Undefined Benahvior Sanitizer and this version of gcc does not 4452667Sstever@eecs.umich.edu # support it. 4464554Sbinkertn@umich.edu if GetOption('with_ubsan') and \ 4474554Sbinkertn@umich.edu compareVersions(gcc_version, '4.9') < 0: 4482667Sstever@eecs.umich.edu print termcap.Yellow + termcap.Bold + \ 4494554Sbinkertn@umich.edu 'Warning: UBSan is only supported using gcc 4.9 and later.' + \ 4504554Sbinkertn@umich.edu termcap.Normal 4514554Sbinkertn@umich.edu 4524554Sbinkertn@umich.edu disable_lto = GetOption('no_lto') 4534554Sbinkertn@umich.edu if not disable_lto and main.get('BROKEN_INCREMENTAL_LTO', False) and \ 4544554Sbinkertn@umich.edu not GetOption('force_lto'): 4554554Sbinkertn@umich.edu print termcap.Yellow + termcap.Bold + \ 4564781Snate@binkert.org 'Warning: Your compiler doesn\'t support incremental linking' + \ 4574554Sbinkertn@umich.edu ' and lto at the same time, so lto is being disabled. To force' + \ 4584554Sbinkertn@umich.edu ' lto on anyway, use the --force-lto option. That will disable' + \ 4592667Sstever@eecs.umich.edu ' partial linking.' + \ 4604554Sbinkertn@umich.edu termcap.Normal 4614554Sbinkertn@umich.edu disable_lto = True 4624554Sbinkertn@umich.edu 4634554Sbinkertn@umich.edu # Add the appropriate Link-Time Optimization (LTO) flags 4642667Sstever@eecs.umich.edu # unless LTO is explicitly turned off. Note that these flags 4654554Sbinkertn@umich.edu # are only used by the fast target. 4662667Sstever@eecs.umich.edu if not disable_lto: 4674554Sbinkertn@umich.edu # Pass the LTO flag when compiling to produce GIMPLE 4684554Sbinkertn@umich.edu # output, we merely create the flags here and only append 4692667Sstever@eecs.umich.edu # them later 4705522Snate@binkert.org main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] 4715522Snate@binkert.org 4725522Snate@binkert.org # Use the same amount of jobs for LTO as we are running 4735522Snate@binkert.org # scons with 4745522Snate@binkert.org main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] 4755522Snate@binkert.org 4765522Snate@binkert.org main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc', 4775522Snate@binkert.org '-fno-builtin-realloc', '-fno-builtin-free']) 4785522Snate@binkert.org 4795522Snate@binkert.org # add option to check for undeclared overrides 4805522Snate@binkert.org if compareVersions(gcc_version, "5.0") > 0: 4815522Snate@binkert.org main.Append(CCFLAGS=['-Wno-error=suggest-override']) 4825522Snate@binkert.org 4835522Snate@binkert.org # The address sanitizer is available for gcc >= 4.8 4845522Snate@binkert.org if GetOption('with_asan'): 4855522Snate@binkert.org if GetOption('with_ubsan') and \ 4865522Snate@binkert.org compareVersions(env['GCC_VERSION'], '4.9') >= 0: 4875522Snate@binkert.org env.Append(CCFLAGS=['-fsanitize=address,undefined', 4885522Snate@binkert.org '-fno-omit-frame-pointer'], 4895522Snate@binkert.org LINKFLAGS='-fsanitize=address,undefined') 4905522Snate@binkert.org else: 4915522Snate@binkert.org env.Append(CCFLAGS=['-fsanitize=address', 4925522Snate@binkert.org '-fno-omit-frame-pointer'], 4935522Snate@binkert.org LINKFLAGS='-fsanitize=address') 4945522Snate@binkert.org # Only gcc >= 4.9 supports UBSan, so check both the version 4955522Snate@binkert.org # and the command-line option before adding the compiler and 4962638Sstever@eecs.umich.edu # linker flags. 4972638Sstever@eecs.umich.edu elif GetOption('with_ubsan') and \ 4982638Sstever@eecs.umich.edu compareVersions(env['GCC_VERSION'], '4.9') >= 0: 4993716Sstever@eecs.umich.edu env.Append(CCFLAGS='-fsanitize=undefined') 5005522Snate@binkert.org env.Append(LINKFLAGS='-fsanitize=undefined') 5015522Snate@binkert.org 5025522Snate@binkert.orgelif main['CLANG']: 5035522Snate@binkert.org # Check for a supported version of clang, >= 3.1 is needed to 5045522Snate@binkert.org # support similar features as gcc 4.8. See 5055522Snate@binkert.org # http://clang.llvm.org/cxx_status.html for details 5061858SN/A clang_version_re = re.compile(".* version (\d+\.\d+)") 5075227Ssaidi@eecs.umich.edu clang_version_match = clang_version_re.search(CXX_version) 5085227Ssaidi@eecs.umich.edu if (clang_version_match): 5095227Ssaidi@eecs.umich.edu clang_version = clang_version_match.groups()[0] 5105227Ssaidi@eecs.umich.edu if compareVersions(clang_version, "3.1") < 0: 5115227Ssaidi@eecs.umich.edu print 'Error: clang version 3.1 or newer required.' 5125863Snate@binkert.org print ' Installed version:', clang_version 5135227Ssaidi@eecs.umich.edu Exit(1) 5145227Ssaidi@eecs.umich.edu else: 5155227Ssaidi@eecs.umich.edu print 'Error: Unable to determine clang version.' 5165227Ssaidi@eecs.umich.edu Exit(1) 5175227Ssaidi@eecs.umich.edu 5185227Ssaidi@eecs.umich.edu # clang has a few additional warnings that we disable, extraneous 5195227Ssaidi@eecs.umich.edu # parantheses are allowed due to Ruby's printing of the AST, 5205204Sstever@gmail.com # finally self assignments are allowed as the generated CPU code 5215204Sstever@gmail.com # is relying on this 5225204Sstever@gmail.com main.Append(CCFLAGS=['-Wno-parentheses', 5235204Sstever@gmail.com '-Wno-self-assign', 5245204Sstever@gmail.com # Some versions of libstdc++ (4.8?) seem to 5255204Sstever@gmail.com # use struct hash and class hash 5265204Sstever@gmail.com # interchangeably. 5275204Sstever@gmail.com '-Wno-mismatched-tags', 5285204Sstever@gmail.com ]) 5295204Sstever@gmail.com 5305204Sstever@gmail.com main.Append(TCMALLOC_CCFLAGS=['-fno-builtin']) 5315204Sstever@gmail.com 5325204Sstever@gmail.com # On Mac OS X/Darwin we need to also use libc++ (part of XCode) as 5335204Sstever@gmail.com # opposed to libstdc++, as the later is dated. 5345204Sstever@gmail.com if sys.platform == "darwin": 5355204Sstever@gmail.com main.Append(CXXFLAGS=['-stdlib=libc++']) 5365204Sstever@gmail.com main.Append(LIBS=['c++']) 5375204Sstever@gmail.com 5385204Sstever@gmail.com # On FreeBSD we need libthr. 5393118Sstever@eecs.umich.edu if sys.platform.startswith('freebsd'): 5403118Sstever@eecs.umich.edu main.Append(LIBS=['thr']) 5413118Sstever@eecs.umich.edu 5423118Sstever@eecs.umich.edu # We require clang >= 3.1, so there is no need to check any 5433118Sstever@eecs.umich.edu # versions here. 5445863Snate@binkert.org if GetOption('with_ubsan'): 5453118Sstever@eecs.umich.edu if GetOption('with_asan'): 5465863Snate@binkert.org env.Append(CCFLAGS=['-fsanitize=address,undefined', 5473118Sstever@eecs.umich.edu '-fno-omit-frame-pointer'], 5485863Snate@binkert.org LINKFLAGS='-fsanitize=address,undefined') 5495863Snate@binkert.org else: 5505863Snate@binkert.org env.Append(CCFLAGS='-fsanitize=undefined', 5515863Snate@binkert.org LINKFLAGS='-fsanitize=undefined') 5525863Snate@binkert.org 5535863Snate@binkert.org elif GetOption('with_asan'): 5545863Snate@binkert.org env.Append(CCFLAGS=['-fsanitize=address', 5555863Snate@binkert.org '-fno-omit-frame-pointer'], 5566003Snate@binkert.org LINKFLAGS='-fsanitize=address') 5575863Snate@binkert.org 5585863Snate@binkert.orgelse: 5595863Snate@binkert.org print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, 5605863Snate@binkert.org print "Don't know what compiler options to use for your compiler." 5615863Snate@binkert.org print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX'] 5625863Snate@binkert.org print termcap.Yellow + ' version:' + termcap.Normal, 5635863Snate@binkert.org if not CXX_version: 5645863Snate@binkert.org print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\ 5655863Snate@binkert.org termcap.Normal 5665863Snate@binkert.org else: 5675863Snate@binkert.org print CXX_version.replace('\n', '<nl>') 5685863Snate@binkert.org print " If you're trying to use a compiler other than GCC" 5695863Snate@binkert.org print " or clang, there appears to be something wrong with your" 5705863Snate@binkert.org print " environment." 5715863Snate@binkert.org print " " 5723118Sstever@eecs.umich.edu print " If you are trying to use a compiler other than those listed" 5735863Snate@binkert.org print " above you will need to ease fix SConstruct and " 5743118Sstever@eecs.umich.edu print " src/SConscript to support that compiler." 5753118Sstever@eecs.umich.edu Exit(1) 5765863Snate@binkert.org 5775863Snate@binkert.org# Set up common yacc/bison flags (needed for Ruby) 5785863Snate@binkert.orgmain['YACCFLAGS'] = '-d' 5795863Snate@binkert.orgmain['YACCHXXFILESUFFIX'] = '.hh' 5805863Snate@binkert.org 5815863Snate@binkert.org# Do this after we save setting back, or else we'll tack on an 5823118Sstever@eecs.umich.edu# extra 'qdo' every time we run scons. 5833483Ssaidi@eecs.umich.eduif main['BATCH']: 5843494Ssaidi@eecs.umich.edu main['CC'] = main['BATCH_CMD'] + ' ' + main['CC'] 5853494Ssaidi@eecs.umich.edu main['CXX'] = main['BATCH_CMD'] + ' ' + main['CXX'] 5863483Ssaidi@eecs.umich.edu main['AS'] = main['BATCH_CMD'] + ' ' + main['AS'] 5873483Ssaidi@eecs.umich.edu main['AR'] = main['BATCH_CMD'] + ' ' + main['AR'] 5883483Ssaidi@eecs.umich.edu main['RANLIB'] = main['BATCH_CMD'] + ' ' + main['RANLIB'] 5893053Sstever@eecs.umich.edu 5903053Sstever@eecs.umich.eduif sys.platform == 'cygwin': 5913918Ssaidi@eecs.umich.edu # cygwin has some header file issues... 5923053Sstever@eecs.umich.edu main.Append(CCFLAGS=["-Wno-uninitialized"]) 5933053Sstever@eecs.umich.edu 5943053Sstever@eecs.umich.edu# Check for the protobuf compiler 5953053Sstever@eecs.umich.eduprotoc_version = readCommand([main['PROTOC'], '--version'], 5963053Sstever@eecs.umich.edu exception='').split() 5971858SN/A 5981858SN/A# First two words should be "libprotoc x.y.z" 5991858SN/Aif len(protoc_version) < 2 or protoc_version[0] != 'libprotoc': 6001858SN/A print termcap.Yellow + termcap.Bold + \ 6011858SN/A 'Warning: Protocol buffer compiler (protoc) not found.\n' + \ 6021858SN/A ' Please install protobuf-compiler for tracing support.' + \ 6035863Snate@binkert.org termcap.Normal 6045863Snate@binkert.org main['PROTOC'] = False 6051859SN/Aelse: 6065863Snate@binkert.org # Based on the availability of the compress stream wrappers, 6071858SN/A # require 2.1.0 6085863Snate@binkert.org min_protoc_version = '2.1.0' 6091858SN/A if compareVersions(protoc_version[1], min_protoc_version) < 0: 6101859SN/A print termcap.Yellow + termcap.Bold + \ 6111859SN/A 'Warning: protoc version', min_protoc_version, \ 6125863Snate@binkert.org 'or newer required.\n' + \ 6133053Sstever@eecs.umich.edu ' Installed version:', protoc_version[1], \ 6143053Sstever@eecs.umich.edu termcap.Normal 6153053Sstever@eecs.umich.edu main['PROTOC'] = False 6163053Sstever@eecs.umich.edu else: 6171859SN/A # Attempt to determine the appropriate include path and 6181859SN/A # library path using pkg-config, that means we also need to 6191859SN/A # check for pkg-config. Note that it is possible to use 6201859SN/A # protobuf without the involvement of pkg-config. Later on we 6211859SN/A # check go a library config check and at that point the test 6221859SN/A # will fail if libprotobuf cannot be found. 6231859SN/A if readCommand(['pkg-config', '--version'], exception=''): 6241859SN/A try: 6251862SN/A # Attempt to establish what linking flags to add for protobuf 6261859SN/A # using pkg-config 6271859SN/A main.ParseConfig('pkg-config --cflags --libs-only-L protobuf') 6281859SN/A except: 6295863Snate@binkert.org print termcap.Yellow + termcap.Bold + \ 6305863Snate@binkert.org 'Warning: pkg-config could not get protobuf flags.' + \ 6315863Snate@binkert.org termcap.Normal 6325863Snate@binkert.org 6331858SN/A 6341858SN/A# Check for 'timeout' from GNU coreutils. If present, regressions will 6355863Snate@binkert.org# be run with a time limit. We require version 8.13 since we rely on 6365863Snate@binkert.org# support for the '--foreground' option. 6375863Snate@binkert.orgif sys.platform.startswith('freebsd'): 6385863Snate@binkert.org timeout_lines = readCommand(['gtimeout', '--version'], 6395863Snate@binkert.org exception='').splitlines() 6405871Snate@binkert.orgelse: 6415871Snate@binkert.org timeout_lines = readCommand(['timeout', '--version'], 6422139SN/A exception='').splitlines() 6434202Sbinkertn@umich.edu# Get the first line and tokenize it 6444202Sbinkertn@umich.edutimeout_version = timeout_lines[0].split() if timeout_lines else [] 6452139SN/Amain['TIMEOUT'] = timeout_version and \ 6462155SN/A compareVersions(timeout_version[-1], '8.13') >= 0 6474202Sbinkertn@umich.edu 6484202Sbinkertn@umich.edu# Add a custom Check function to test for structure members. 6494202Sbinkertn@umich.edudef CheckMember(context, include, decl, member, include_quotes="<>"): 6502155SN/A context.Message("Checking for member %s in %s..." % 6515863Snate@binkert.org (member, decl)) 6521869SN/A text = """ 6531869SN/A#include %(header)s 6545863Snate@binkert.orgint main(){ 6555863Snate@binkert.org %(decl)s test; 6564202Sbinkertn@umich.edu (void)test.%(member)s; 6575863Snate@binkert.org return 0; 6585863Snate@binkert.org}; 6595863Snate@binkert.org""" % { "header" : include_quotes[0] + include + include_quotes[1], 6604202Sbinkertn@umich.edu "decl" : decl, 6614202Sbinkertn@umich.edu "member" : member, 6625863Snate@binkert.org } 6635742Snate@binkert.org 6645742Snate@binkert.org ret = context.TryCompile(text, extension=".cc") 6655341Sstever@gmail.com context.Result(ret) 6665342Sstever@gmail.com return ret 6675342Sstever@gmail.com 6684202Sbinkertn@umich.edu# Platform-specific configuration. Note again that we assume that all 6694202Sbinkertn@umich.edu# builds under a given build root run on the same host platform. 6704202Sbinkertn@umich.educonf = Configure(main, 6714202Sbinkertn@umich.edu conf_dir = joinpath(build_root, '.scons_config'), 6724202Sbinkertn@umich.edu log_file = joinpath(build_root, 'scons_config.log'), 6735863Snate@binkert.org custom_tests = { 6745863Snate@binkert.org 'CheckMember' : CheckMember, 6755863Snate@binkert.org }) 6765863Snate@binkert.org 6775863Snate@binkert.org# Check if we should compile a 64 bit binary on Mac OS X/Darwin 6785863Snate@binkert.orgtry: 6795863Snate@binkert.org import platform 6805863Snate@binkert.org uname = platform.uname() 6815863Snate@binkert.org if uname[0] == 'Darwin' and compareVersions(uname[2], '9.0.0') >= 0: 6825863Snate@binkert.org if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]): 6835863Snate@binkert.org main.Append(CCFLAGS=['-arch', 'x86_64']) 6845863Snate@binkert.org main.Append(CFLAGS=['-arch', 'x86_64']) 6855863Snate@binkert.org main.Append(LINKFLAGS=['-arch', 'x86_64']) 6865863Snate@binkert.org main.Append(ASFLAGS=['-arch', 'x86_64']) 6875863Snate@binkert.orgexcept: 6885863Snate@binkert.org pass 6895863Snate@binkert.org 6905863Snate@binkert.org# Recent versions of scons substitute a "Null" object for Configure() 6915863Snate@binkert.org# when configuration isn't necessary, e.g., if the "--help" option is 6925863Snate@binkert.org# present. Unfortuantely this Null object always returns false, 6935952Ssaidi@eecs.umich.edu# breaking all our configuration checks. We replace it with our own 6941869SN/A# more optimistic null object that returns True instead. 6951858SN/Aif not conf: 6965863Snate@binkert.org def NullCheck(*args, **kwargs): 6975863Snate@binkert.org return True 6981869SN/A 6991858SN/A class NullConf: 7005863Snate@binkert.org def __init__(self, env): 7015863Snate@binkert.org self.env = env 7025863Snate@binkert.org def Finish(self): 7035863Snate@binkert.org return self.env 7045952Ssaidi@eecs.umich.edu def __getattr__(self, mname): 7051858SN/A return NullCheck 706955SN/A 707955SN/A conf = NullConf(main) 7081869SN/A 7091869SN/A# Cache build files in the supplied directory. 7101869SN/Aif main['M5_BUILD_CACHE']: 7111869SN/A print 'Using build cache located at', main['M5_BUILD_CACHE'] 7121869SN/A CacheDir(main['M5_BUILD_CACHE']) 7135863Snate@binkert.org 7145863Snate@binkert.orgmain['USE_PYTHON'] = not GetOption('without_python') 7155863Snate@binkert.orgif main['USE_PYTHON']: 7161869SN/A # Find Python include and library directories for embedding the 7175863Snate@binkert.org # interpreter. We rely on python-config to resolve the appropriate 7181869SN/A # includes and linker flags. ParseConfig does not seem to understand 7195863Snate@binkert.org # the more exotic linker flags such as -Xlinker and -export-dynamic so 7201869SN/A # we add them explicitly below. If you want to link in an alternate 7211869SN/A # version of python, see above for instructions on how to invoke 7221869SN/A # scons with the appropriate PATH set. 7231869SN/A # 7241869SN/A # First we check if python2-config exists, else we use python-config 7255863Snate@binkert.org python_config = readCommand(['which', 'python2-config'], 7265863Snate@binkert.org exception='').strip() 7271869SN/A if not os.path.exists(python_config): 7281869SN/A python_config = readCommand(['which', 'python-config'], 7291869SN/A exception='').strip() 7301869SN/A py_includes = readCommand([python_config, '--includes'], 7311869SN/A exception='').split() 7321869SN/A # Strip the -I from the include folders before adding them to the 7331869SN/A # CPPPATH 7345863Snate@binkert.org main.Append(CPPPATH=map(lambda inc: inc[2:], py_includes)) 7355863Snate@binkert.org 7361869SN/A # Read the linker flags and split them into libraries and other link 7375863Snate@binkert.org # flags. The libraries are added later through the call the CheckLib. 7385863Snate@binkert.org py_ld_flags = readCommand([python_config, '--ldflags'], 7393356Sbinkertn@umich.edu exception='').split() 7403356Sbinkertn@umich.edu py_libs = [] 7413356Sbinkertn@umich.edu for lib in py_ld_flags: 7423356Sbinkertn@umich.edu if not lib.startswith('-l'): 7433356Sbinkertn@umich.edu main.Append(LINKFLAGS=[lib]) 7444781Snate@binkert.org else: 7455863Snate@binkert.org lib = lib[2:] 7465863Snate@binkert.org if lib not in py_libs: 7471869SN/A py_libs.append(lib) 7481869SN/A 7491869SN/A # verify that this stuff works 7501869SN/A if not conf.CheckHeader('Python.h', '<>'): 7511869SN/A print "Error: can't find Python.h header in", py_includes 7522638Sstever@eecs.umich.edu print "Install Python headers (package python-dev on Ubuntu and RedHat)" 7532638Sstever@eecs.umich.edu Exit(1) 7545871Snate@binkert.org 7552638Sstever@eecs.umich.edu for lib in py_libs: 7565749Scws3k@cs.virginia.edu if not conf.CheckLib(lib): 7575749Scws3k@cs.virginia.edu print "Error: can't find library %s required by python" % lib 7585871Snate@binkert.org Exit(1) 7595749Scws3k@cs.virginia.edu 7601869SN/A# On Solaris you need to use libsocket for socket ops 7611869SN/Aif not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'): 7623546Sgblack@eecs.umich.edu if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'): 7633546Sgblack@eecs.umich.edu print "Can't find library with socket calls (e.g. accept())" 7643546Sgblack@eecs.umich.edu Exit(1) 7653546Sgblack@eecs.umich.edu 7664202Sbinkertn@umich.edu# Check for zlib. If the check passes, libz will be automatically 7675863Snate@binkert.org# added to the LIBS environment variable. 7683546Sgblack@eecs.umich.eduif not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'): 7693546Sgblack@eecs.umich.edu print 'Error: did not find needed zlib compression library '\ 7703546Sgblack@eecs.umich.edu 'and/or zlib.h header file.' 7713546Sgblack@eecs.umich.edu print ' Please install zlib and try again.' 7724781Snate@binkert.org Exit(1) 7735863Snate@binkert.org 7744781Snate@binkert.org# If we have the protobuf compiler, also make sure we have the 7754781Snate@binkert.org# development libraries. If the check passes, libprotobuf will be 7764781Snate@binkert.org# automatically added to the LIBS environment variable. After 7774781Snate@binkert.org# this, we can use the HAVE_PROTOBUF flag to determine if we have 7784781Snate@binkert.org# got both protoc and libprotobuf available. 7795863Snate@binkert.orgmain['HAVE_PROTOBUF'] = main['PROTOC'] and \ 7804781Snate@binkert.org conf.CheckLibWithHeader('protobuf', 'google/protobuf/message.h', 7814781Snate@binkert.org 'C++', 'GOOGLE_PROTOBUF_VERIFY_VERSION;') 7824781Snate@binkert.org 7834781Snate@binkert.org# If we have the compiler but not the library, print another warning. 7843546Sgblack@eecs.umich.eduif main['PROTOC'] and not main['HAVE_PROTOBUF']: 7853546Sgblack@eecs.umich.edu print termcap.Yellow + termcap.Bold + \ 7863546Sgblack@eecs.umich.edu 'Warning: did not find protocol buffer library and/or headers.\n' + \ 7874781Snate@binkert.org ' Please install libprotobuf-dev for tracing support.' + \ 7883546Sgblack@eecs.umich.edu termcap.Normal 7893546Sgblack@eecs.umich.edu 7903546Sgblack@eecs.umich.edu# Check for librt. 7913546Sgblack@eecs.umich.eduhave_posix_clock = \ 7923546Sgblack@eecs.umich.edu conf.CheckLibWithHeader(None, 'time.h', 'C', 7933546Sgblack@eecs.umich.edu 'clock_nanosleep(0,0,NULL,NULL);') or \ 7943546Sgblack@eecs.umich.edu conf.CheckLibWithHeader('rt', 'time.h', 'C', 7953546Sgblack@eecs.umich.edu 'clock_nanosleep(0,0,NULL,NULL);') 7963546Sgblack@eecs.umich.edu 7973546Sgblack@eecs.umich.eduhave_posix_timers = \ 7984202Sbinkertn@umich.edu conf.CheckLibWithHeader([None, 'rt'], [ 'time.h', 'signal.h' ], 'C', 7993546Sgblack@eecs.umich.edu 'timer_create(CLOCK_MONOTONIC, NULL, NULL);') 8003546Sgblack@eecs.umich.edu 8013546Sgblack@eecs.umich.eduif not GetOption('without_tcmalloc'): 802955SN/A if conf.CheckLib('tcmalloc'): 803955SN/A main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) 804955SN/A elif conf.CheckLib('tcmalloc_minimal'): 805955SN/A main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) 8061858SN/A else: 8071858SN/A print termcap.Yellow + termcap.Bold + \ 8081858SN/A "You can get a 12% performance improvement by "\ 8095863Snate@binkert.org "installing tcmalloc (libgoogle-perftools-dev package "\ 8105863Snate@binkert.org "on Ubuntu or RedHat)." + termcap.Normal 8115343Sstever@gmail.com 8125343Sstever@gmail.com 8135863Snate@binkert.org# Detect back trace implementations. The last implementation in the 8145863Snate@binkert.org# list will be used by default. 8154773Snate@binkert.orgbacktrace_impls = [ "none" ] 8165863Snate@binkert.org 8172632Sstever@eecs.umich.edubacktrace_checker = 'char temp;' + \ 8185863Snate@binkert.org ' backtrace_symbols_fd((void*)&temp, 0, 0);' 8192023SN/Aif conf.CheckLibWithHeader(None, 'execinfo.h', 'C', backtrace_checker): 8205863Snate@binkert.org backtrace_impls.append("glibc") 8215863Snate@binkert.orgelif conf.CheckLibWithHeader('execinfo', 'execinfo.h', 'C', 8225863Snate@binkert.org backtrace_checker): 8235863Snate@binkert.org # NetBSD and FreeBSD need libexecinfo. 8245863Snate@binkert.org backtrace_impls.append("glibc") 8255863Snate@binkert.org main.Append(LIBS=['execinfo']) 8265863Snate@binkert.org 8275863Snate@binkert.orgif backtrace_impls[-1] == "none": 8285863Snate@binkert.org default_backtrace_impl = "none" 8292632Sstever@eecs.umich.edu print termcap.Yellow + termcap.Bold + \ 8305863Snate@binkert.org "No suitable back trace implementation found." + \ 8312023SN/A termcap.Normal 8322632Sstever@eecs.umich.edu 8335863Snate@binkert.orgif not have_posix_clock: 8345342Sstever@gmail.com print "Can't find library for POSIX clocks." 8355863Snate@binkert.org 8362632Sstever@eecs.umich.edu# Check for <fenv.h> (C99 FP environment control) 8375863Snate@binkert.orghave_fenv = conf.CheckHeader('fenv.h', '<>') 8385863Snate@binkert.orgif not have_fenv: 8392632Sstever@eecs.umich.edu print "Warning: Header file <fenv.h> not found." 8405863Snate@binkert.org print " This host has no IEEE FP rounding mode control." 8415863Snate@binkert.org 8425863Snate@binkert.org# Check for <png.h> (libpng library needed if wanting to dump 8435863Snate@binkert.org# frame buffer image in png format) 8445863Snate@binkert.orghave_png = conf.CheckHeader('png.h', '<>') 8455863Snate@binkert.orgif not have_png: 8462632Sstever@eecs.umich.edu print "Warning: Header file <png.h> not found." 8475863Snate@binkert.org print " This host has no libpng library." 8485863Snate@binkert.org print " Disabling support for PNG framebuffers." 8492632Sstever@eecs.umich.edu 8501888SN/A# Check if we should enable KVM-based hardware virtualization. The API 8515863Snate@binkert.org# we rely on exists since version 2.6.36 of the kernel, but somehow 8525863Snate@binkert.org# the KVM_API_VERSION does not reflect the change. We test for one of 8535863Snate@binkert.org# the types as a fall back. 8541858SN/Ahave_kvm = conf.CheckHeader('linux/kvm.h', '<>') 8555863Snate@binkert.orgif not have_kvm: 8565863Snate@binkert.org print "Info: Compatible header file <linux/kvm.h> not found, " \ 8575863Snate@binkert.org "disabling KVM support." 8585863Snate@binkert.org 8592598SN/A# Check if the TUN/TAP driver is available. 8605863Snate@binkert.orghave_tuntap = conf.CheckHeader('linux/if_tun.h', '<>') 8611858SN/Aif not have_tuntap: 8621858SN/A print "Info: Compatible header file <linux/if_tun.h> not found." 8631858SN/A 8645863Snate@binkert.org# x86 needs support for xsave. We test for the structure here since we 8651858SN/A# won't be able to run new tests by the time we know which ISA we're 8661858SN/A# targeting. 8671858SN/Ahave_kvm_xsave = conf.CheckTypeSize('struct kvm_xsave', 8685863Snate@binkert.org '#include <linux/kvm.h>') != 0 8691871SN/A 8701858SN/A# Check if the requested target ISA is compatible with the host 8711858SN/Adef is_isa_kvm_compatible(isa): 8721858SN/A try: 8731858SN/A import platform 8741858SN/A host_isa = platform.machine() 8751858SN/A except: 8761858SN/A print "Warning: Failed to determine host ISA." 8775863Snate@binkert.org return False 8781858SN/A 8791858SN/A if not have_posix_timers: 8805863Snate@binkert.org print "Warning: Can not enable KVM, host seems to lack support " \ 8811859SN/A "for POSIX timers" 8821859SN/A return False 8831869SN/A 8845863Snate@binkert.org if isa == "arm": 8855863Snate@binkert.org return host_isa in ( "armv7l", "aarch64" ) 8861869SN/A elif isa == "x86": 8871965SN/A if host_isa != "x86_64": 8881965SN/A return False 8891965SN/A 8902761Sstever@eecs.umich.edu if not have_kvm_xsave: 8915863Snate@binkert.org print "KVM on x86 requires xsave support in kernel headers." 8921869SN/A return False 8935863Snate@binkert.org 8942667Sstever@eecs.umich.edu return True 8951869SN/A else: 8961869SN/A return False 8972929Sktlim@umich.edu 8982929Sktlim@umich.edu 8995863Snate@binkert.org# Check if the exclude_host attribute is available. We want this to 9002929Sktlim@umich.edu# get accurate instruction counts in KVM. 901955SN/Amain['HAVE_PERF_ATTR_EXCLUDE_HOST'] = conf.CheckMember( 9022598SN/A 'linux/perf_event.h', 'struct perf_event_attr', 'exclude_host') 903 904 905###################################################################### 906# 907# Finish the configuration 908# 909main = conf.Finish() 910 911###################################################################### 912# 913# Collect all non-global variables 914# 915 916# Define the universe of supported ISAs 917all_isa_list = [ ] 918all_gpu_isa_list = [ ] 919Export('all_isa_list') 920Export('all_gpu_isa_list') 921 922class CpuModel(object): 923 '''The CpuModel class encapsulates everything the ISA parser needs to 924 know about a particular CPU model.''' 925 926 # Dict of available CPU model objects. Accessible as CpuModel.dict. 927 dict = {} 928 929 # Constructor. Automatically adds models to CpuModel.dict. 930 def __init__(self, name, default=False): 931 self.name = name # name of model 932 933 # This cpu is enabled by default 934 self.default = default 935 936 # Add self to dict 937 if name in CpuModel.dict: 938 raise AttributeError, "CpuModel '%s' already registered" % name 939 CpuModel.dict[name] = self 940 941Export('CpuModel') 942 943# Sticky variables get saved in the variables file so they persist from 944# one invocation to the next (unless overridden, in which case the new 945# value becomes sticky). 946sticky_vars = Variables(args=ARGUMENTS) 947Export('sticky_vars') 948 949# Sticky variables that should be exported 950export_vars = [] 951Export('export_vars') 952 953# For Ruby 954all_protocols = [] 955Export('all_protocols') 956protocol_dirs = [] 957Export('protocol_dirs') 958slicc_includes = [] 959Export('slicc_includes') 960 961# Walk the tree and execute all SConsopts scripts that wil add to the 962# above variables 963if GetOption('verbose'): 964 print "Reading SConsopts" 965for bdir in [ base_dir ] + extras_dir_list: 966 if not isdir(bdir): 967 print "Error: directory '%s' does not exist" % bdir 968 Exit(1) 969 for root, dirs, files in os.walk(bdir): 970 if 'SConsopts' in files: 971 if GetOption('verbose'): 972 print "Reading", joinpath(root, 'SConsopts') 973 SConscript(joinpath(root, 'SConsopts')) 974 975all_isa_list.sort() 976all_gpu_isa_list.sort() 977 978sticky_vars.AddVariables( 979 EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list), 980 EnumVariable('TARGET_GPU_ISA', 'Target GPU ISA', 'hsail', all_gpu_isa_list), 981 ListVariable('CPU_MODELS', 'CPU models', 982 sorted(n for n,m in CpuModel.dict.iteritems() if m.default), 983 sorted(CpuModel.dict.keys())), 984 BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger', 985 False), 986 BoolVariable('SS_COMPATIBLE_FP', 987 'Make floating-point results compatible with SimpleScalar', 988 False), 989 BoolVariable('USE_SSE2', 990 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts', 991 False), 992 BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock), 993 BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv), 994 BoolVariable('USE_PNG', 'Enable support for PNG images', have_png), 995 BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', 996 False), 997 BoolVariable('USE_KVM', 'Enable hardware virtualized (KVM) CPU models', 998 have_kvm), 999 BoolVariable('USE_TUNTAP', 1000 'Enable using a tap device to bridge to the host network', 1001 have_tuntap), 1002 BoolVariable('BUILD_GPU', 'Build the compute-GPU model', False), 1003 EnumVariable('PROTOCOL', 'Coherence protocol for Ruby', 'None', 1004 all_protocols), 1005 EnumVariable('BACKTRACE_IMPL', 'Post-mortem dump implementation', 1006 backtrace_impls[-1], backtrace_impls) 1007 ) 1008 1009# These variables get exported to #defines in config/*.hh (see src/SConscript). 1010export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', 'TARGET_ISA', 'TARGET_GPU_ISA', 1011 'CP_ANNOTATE', 'USE_POSIX_CLOCK', 'USE_KVM', 'USE_TUNTAP', 1012 'PROTOCOL', 'HAVE_PROTOBUF', 'HAVE_PERF_ATTR_EXCLUDE_HOST', 1013 'USE_PNG'] 1014 1015################################################### 1016# 1017# Define a SCons builder for configuration flag headers. 1018# 1019################################################### 1020 1021# This function generates a config header file that #defines the 1022# variable symbol to the current variable setting (0 or 1). The source 1023# operands are the name of the variable and a Value node containing the 1024# value of the variable. 1025def build_config_file(target, source, env): 1026 (variable, value) = [s.get_contents() for s in source] 1027 f = file(str(target[0]), 'w') 1028 print >> f, '#define', variable, value 1029 f.close() 1030 return None 1031 1032# Combine the two functions into a scons Action object. 1033config_action = MakeAction(build_config_file, Transform("CONFIG H", 2)) 1034 1035# The emitter munges the source & target node lists to reflect what 1036# we're really doing. 1037def config_emitter(target, source, env): 1038 # extract variable name from Builder arg 1039 variable = str(target[0]) 1040 # True target is config header file 1041 target = joinpath('config', variable.lower() + '.hh') 1042 val = env[variable] 1043 if isinstance(val, bool): 1044 # Force value to 0/1 1045 val = int(val) 1046 elif isinstance(val, str): 1047 val = '"' + val + '"' 1048 1049 # Sources are variable name & value (packaged in SCons Value nodes) 1050 return ([target], [Value(variable), Value(val)]) 1051 1052config_builder = Builder(emitter = config_emitter, action = config_action) 1053 1054main.Append(BUILDERS = { 'ConfigFile' : config_builder }) 1055 1056################################################### 1057# 1058# Builders for static and shared partially linked object files. 1059# 1060################################################### 1061 1062partial_static_builder = Builder(action=SCons.Defaults.LinkAction, 1063 src_suffix='$OBJSUFFIX', 1064 src_builder=['StaticObject', 'Object'], 1065 LINKFLAGS='$PLINKFLAGS', 1066 LIBS='') 1067 1068def partial_shared_emitter(target, source, env): 1069 for tgt in target: 1070 tgt.attributes.shared = 1 1071 return (target, source) 1072partial_shared_builder = Builder(action=SCons.Defaults.ShLinkAction, 1073 emitter=partial_shared_emitter, 1074 src_suffix='$SHOBJSUFFIX', 1075 src_builder='SharedObject', 1076 SHLINKFLAGS='$PSHLINKFLAGS', 1077 LIBS='') 1078 1079main.Append(BUILDERS = { 'PartialShared' : partial_shared_builder, 1080 'PartialStatic' : partial_static_builder }) 1081 1082# builds in ext are shared across all configs in the build root. 1083ext_dir = abspath(joinpath(str(main.root), 'ext')) 1084ext_build_dirs = [] 1085for root, dirs, files in os.walk(ext_dir): 1086 if 'SConscript' in files: 1087 build_dir = os.path.relpath(root, ext_dir) 1088 ext_build_dirs.append(build_dir) 1089 main.SConscript(joinpath(root, 'SConscript'), 1090 variant_dir=joinpath(build_root, build_dir)) 1091 1092main.Prepend(CPPPATH=Dir('ext/pybind11/include/')) 1093 1094################################################### 1095# 1096# This builder and wrapper method are used to set up a directory with 1097# switching headers. Those are headers which are in a generic location and 1098# that include more specific headers from a directory chosen at build time 1099# based on the current build settings. 1100# 1101################################################### 1102 1103def build_switching_header(target, source, env): 1104 path = str(target[0]) 1105 subdir = str(source[0]) 1106 dp, fp = os.path.split(path) 1107 dp = os.path.relpath(os.path.realpath(dp), 1108 os.path.realpath(env['BUILDDIR'])) 1109 with open(path, 'w') as hdr: 1110 print >>hdr, '#include "%s/%s/%s"' % (dp, subdir, fp) 1111 1112switching_header_action = MakeAction(build_switching_header, 1113 Transform('GENERATE')) 1114 1115switching_header_builder = Builder(action=switching_header_action, 1116 source_factory=Value, 1117 single_source=True) 1118 1119main.Append(BUILDERS = { 'SwitchingHeader': switching_header_builder }) 1120 1121def switching_headers(self, headers, source): 1122 for header in headers: 1123 self.SwitchingHeader(header, source) 1124 1125main.AddMethod(switching_headers, 'SwitchingHeaders') 1126 1127################################################### 1128# 1129# Define build environments for selected configurations. 1130# 1131################################################### 1132 1133for variant_path in variant_paths: 1134 if not GetOption('silent'): 1135 print "Building in", variant_path 1136 1137 # Make a copy of the build-root environment to use for this config. 1138 env = main.Clone() 1139 env['BUILDDIR'] = variant_path 1140 1141 # variant_dir is the tail component of build path, and is used to 1142 # determine the build parameters (e.g., 'ALPHA_SE') 1143 (build_root, variant_dir) = splitpath(variant_path) 1144 1145 # Set env variables according to the build directory config. 1146 sticky_vars.files = [] 1147 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in 1148 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke 1149 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings. 1150 current_vars_file = joinpath(build_root, 'variables', variant_dir) 1151 if isfile(current_vars_file): 1152 sticky_vars.files.append(current_vars_file) 1153 if not GetOption('silent'): 1154 print "Using saved variables file %s" % current_vars_file 1155 elif variant_dir in ext_build_dirs: 1156 # Things in ext are built without a variant directory. 1157 continue 1158 else: 1159 # Build dir-specific variables file doesn't exist. 1160 1161 # Make sure the directory is there so we can create it later 1162 opt_dir = dirname(current_vars_file) 1163 if not isdir(opt_dir): 1164 mkdir(opt_dir) 1165 1166 # Get default build variables from source tree. Variables are 1167 # normally determined by name of $VARIANT_DIR, but can be 1168 # overridden by '--default=' arg on command line. 1169 default = GetOption('default') 1170 opts_dir = joinpath(main.root.abspath, 'build_opts') 1171 if default: 1172 default_vars_files = [joinpath(build_root, 'variables', default), 1173 joinpath(opts_dir, default)] 1174 else: 1175 default_vars_files = [joinpath(opts_dir, variant_dir)] 1176 existing_files = filter(isfile, default_vars_files) 1177 if existing_files: 1178 default_vars_file = existing_files[0] 1179 sticky_vars.files.append(default_vars_file) 1180 print "Variables file %s not found,\n using defaults in %s" \ 1181 % (current_vars_file, default_vars_file) 1182 else: 1183 print "Error: cannot find variables file %s or " \ 1184 "default file(s) %s" \ 1185 % (current_vars_file, ' or '.join(default_vars_files)) 1186 Exit(1) 1187 1188 # Apply current variable settings to env 1189 sticky_vars.Update(env) 1190 1191 help_texts["local_vars"] += \ 1192 "Build variables for %s:\n" % variant_dir \ 1193 + sticky_vars.GenerateHelpText(env) 1194 1195 # Process variable settings. 1196 1197 if not have_fenv and env['USE_FENV']: 1198 print "Warning: <fenv.h> not available; " \ 1199 "forcing USE_FENV to False in", variant_dir + "." 1200 env['USE_FENV'] = False 1201 1202 if not env['USE_FENV']: 1203 print "Warning: No IEEE FP rounding mode control in", variant_dir + "." 1204 print " FP results may deviate slightly from other platforms." 1205 1206 if not have_png and env['USE_PNG']: 1207 print "Warning: <png.h> not available; " \ 1208 "forcing USE_PNG to False in", variant_dir + "." 1209 env['USE_PNG'] = False 1210 1211 if env['USE_PNG']: 1212 env.Append(LIBS=['png']) 1213 1214 if env['EFENCE']: 1215 env.Append(LIBS=['efence']) 1216 1217 if env['USE_KVM']: 1218 if not have_kvm: 1219 print "Warning: Can not enable KVM, host seems to lack KVM support" 1220 env['USE_KVM'] = False 1221 elif not is_isa_kvm_compatible(env['TARGET_ISA']): 1222 print "Info: KVM support disabled due to unsupported host and " \ 1223 "target ISA combination" 1224 env['USE_KVM'] = False 1225 1226 if env['USE_TUNTAP']: 1227 if not have_tuntap: 1228 print "Warning: Can't connect EtherTap with a tap device." 1229 env['USE_TUNTAP'] = False 1230 1231 if env['BUILD_GPU']: 1232 env.Append(CPPDEFINES=['BUILD_GPU']) 1233 1234 # Warn about missing optional functionality 1235 if env['USE_KVM']: 1236 if not main['HAVE_PERF_ATTR_EXCLUDE_HOST']: 1237 print "Warning: perf_event headers lack support for the " \ 1238 "exclude_host attribute. KVM instruction counts will " \ 1239 "be inaccurate." 1240 1241 # Save sticky variable settings back to current variables file 1242 sticky_vars.Save(current_vars_file, env) 1243 1244 if env['USE_SSE2']: 1245 env.Append(CCFLAGS=['-msse2']) 1246 1247 # The src/SConscript file sets up the build rules in 'env' according 1248 # to the configured variables. It returns a list of environments, 1249 # one for each variant build (debug, opt, etc.) 1250 SConscript('src/SConscript', variant_dir = variant_path, exports = 'env') 1251 1252# base help text 1253Help(''' 1254Usage: scons [scons options] [build variables] [target(s)] 1255 1256Extra scons options: 1257%(options)s 1258 1259Global build variables: 1260%(global_vars)s 1261 1262%(local_vars)s 1263''' % help_texts) 1264