SConstruct revision 4775
1955SN/A# -*- mode:python -*- 2955SN/A 31762SN/A# Copyright (c) 2004-2005 The Regents of The University of Michigan 4955SN/A# All rights reserved. 5955SN/A# 6955SN/A# Redistribution and use in source and binary forms, with or without 7955SN/A# modification, are permitted provided that the following conditions are 8955SN/A# met: redistributions of source code must retain the above copyright 9955SN/A# notice, this list of conditions and the following disclaimer; 10955SN/A# redistributions in binary form must reproduce the above copyright 11955SN/A# notice, this list of conditions and the following disclaimer in the 12955SN/A# documentation and/or other materials provided with the distribution; 13955SN/A# neither the name of the copyright holders nor the names of its 14955SN/A# contributors may be used to endorse or promote products derived from 15955SN/A# this software without specific prior written permission. 16955SN/A# 17955SN/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18955SN/A# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19955SN/A# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20955SN/A# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21955SN/A# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22955SN/A# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23955SN/A# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24955SN/A# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25955SN/A# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26955SN/A# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27955SN/A# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 282665Ssaidi@eecs.umich.edu# 292665Ssaidi@eecs.umich.edu# Authors: Steve Reinhardt 30955SN/A 31955SN/A################################################### 32955SN/A# 33955SN/A# SCons top-level build description (SConstruct) file. 34955SN/A# 352632Sstever@eecs.umich.edu# While in this directory ('m5'), just type 'scons' to build the default 362632Sstever@eecs.umich.edu# configuration (see below), or type 'scons build/<CONFIG>/<binary>' 372632Sstever@eecs.umich.edu# to build some other configuration (e.g., 'build/ALPHA_FS/m5.opt' for 382632Sstever@eecs.umich.edu# the optimized full-system version). 39955SN/A# 402632Sstever@eecs.umich.edu# You can build M5 in a different directory as long as there is a 412632Sstever@eecs.umich.edu# 'build/<CONFIG>' somewhere along the target path. The build system 422761Sstever@eecs.umich.edu# expects that all configs under the same build directory are being 432632Sstever@eecs.umich.edu# built for the same host system. 442632Sstever@eecs.umich.edu# 452632Sstever@eecs.umich.edu# Examples: 462761Sstever@eecs.umich.edu# 472761Sstever@eecs.umich.edu# The following two commands are equivalent. The '-u' option tells 482761Sstever@eecs.umich.edu# scons to search up the directory tree for this SConstruct file. 492632Sstever@eecs.umich.edu# % cd <path-to-src>/m5 ; scons build/ALPHA_FS/m5.debug 502632Sstever@eecs.umich.edu# % cd <path-to-src>/m5/build/ALPHA_FS; scons -u m5.debug 512761Sstever@eecs.umich.edu# 522761Sstever@eecs.umich.edu# The following two commands are equivalent and demonstrate building 532761Sstever@eecs.umich.edu# in a directory outside of the source tree. The '-C' option tells 542761Sstever@eecs.umich.edu# scons to chdir to the specified directory to find this SConstruct 552761Sstever@eecs.umich.edu# file. 562632Sstever@eecs.umich.edu# % cd <path-to-src>/m5 ; scons /local/foo/build/ALPHA_FS/m5.debug 572632Sstever@eecs.umich.edu# % cd /local/foo/build/ALPHA_FS; scons -C <path-to-src>/m5 m5.debug 582632Sstever@eecs.umich.edu# 592632Sstever@eecs.umich.edu# You can use 'scons -H' to print scons options. If you're in this 602632Sstever@eecs.umich.edu# 'm5' directory (or use -u or -C to tell scons where to find this 612632Sstever@eecs.umich.edu# file), you can use 'scons -h' to print all the M5-specific build 622632Sstever@eecs.umich.edu# options as well. 63955SN/A# 64955SN/A################################################### 65955SN/A 66955SN/Aimport sys 67955SN/Aimport os 683918Ssaidi@eecs.umich.eduimport subprocess 694202Sbinkertn@umich.edu 704678Snate@binkert.orgfrom os.path import isdir, join as joinpath 71955SN/A 722656Sstever@eecs.umich.edu# Check for recent-enough Python and SCons versions. If your system's 732656Sstever@eecs.umich.edu# default installation of Python is not recent enough, you can use a 742656Sstever@eecs.umich.edu# non-default installation of the Python interpreter by either (1) 752656Sstever@eecs.umich.edu# rearranging your PATH so that scons finds the non-default 'python' 762656Sstever@eecs.umich.edu# first or (2) explicitly invoking an alternative interpreter on the 772656Sstever@eecs.umich.edu# scons script, e.g., "/usr/local/bin/python2.4 `which scons` [args]". 782656Sstever@eecs.umich.eduEnsurePythonVersion(2,4) 792653Sstever@eecs.umich.edu 802653Sstever@eecs.umich.edu# Ironically, SCons 0.96 dies if you give EnsureSconsVersion a 812653Sstever@eecs.umich.edu# 3-element version number. 822653Sstever@eecs.umich.edumin_scons_version = (0,96,91) 832653Sstever@eecs.umich.edutry: 842653Sstever@eecs.umich.edu EnsureSConsVersion(*min_scons_version) 852653Sstever@eecs.umich.eduexcept: 862653Sstever@eecs.umich.edu print "Error checking current SCons version." 872653Sstever@eecs.umich.edu print "SCons", ".".join(map(str,min_scons_version)), "or greater required." 882653Sstever@eecs.umich.edu Exit(2) 892653Sstever@eecs.umich.edu 901852SN/A 91955SN/A# The absolute path to the current directory (where this file lives). 92955SN/AROOT = Dir('.').abspath 93955SN/A 943717Sstever@eecs.umich.edu# Path to the M5 source tree. 953716Sstever@eecs.umich.eduSRCDIR = joinpath(ROOT, 'src') 96955SN/A 971533SN/A# tell python where to find m5 python code 983716Sstever@eecs.umich.edusys.path.append(joinpath(ROOT, 'src/python')) 991533SN/A 1004678Snate@binkert.orgdef check_style_hook(ui): 1014678Snate@binkert.org ui.readconfig(joinpath(ROOT, '.hg', 'hgrc')) 1024678Snate@binkert.org style_hook = ui.config('hooks', 'pretxncommit.style', None) 1034678Snate@binkert.org 1044678Snate@binkert.org if not style_hook: 1054678Snate@binkert.org print """\ 1064678Snate@binkert.orgYou're missing the M5 style hook. 1074678Snate@binkert.orgPlease install the hook so we can ensure that all code fits a common style. 1084678Snate@binkert.org 1094678Snate@binkert.orgAll you'd need to do is add the following lines to your repository .hg/hgrc 1104678Snate@binkert.orgor your personal .hgrc 1114678Snate@binkert.org---------------- 1124678Snate@binkert.org 1134678Snate@binkert.org[extensions] 1144678Snate@binkert.orgstyle = %s/util/style.py 1154678Snate@binkert.org 1164678Snate@binkert.org[hooks] 1174678Snate@binkert.orgpretxncommit.style = python:style.check_whitespace 1184678Snate@binkert.org""" % (ROOT) 1194678Snate@binkert.org sys.exit(1) 1204678Snate@binkert.org 1214678Snate@binkert.orgif isdir(joinpath(ROOT, '.hg')): 1224678Snate@binkert.org try: 1234678Snate@binkert.org from mercurial import ui 1244678Snate@binkert.org check_style_hook(ui.ui()) 1254678Snate@binkert.org except ImportError: 1264678Snate@binkert.org pass 1274678Snate@binkert.org 128955SN/A################################################### 129955SN/A# 1302632Sstever@eecs.umich.edu# Figure out which configurations to set up based on the path(s) of 1312632Sstever@eecs.umich.edu# the target(s). 132955SN/A# 133955SN/A################################################### 134955SN/A 135955SN/A# Find default configuration & binary. 1362632Sstever@eecs.umich.eduDefault(os.environ.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug')) 137955SN/A 1382632Sstever@eecs.umich.edu# helper function: find last occurrence of element in list 1392632Sstever@eecs.umich.edudef rfind(l, elt, offs = -1): 1402632Sstever@eecs.umich.edu for i in range(len(l)+offs, 0, -1): 1412632Sstever@eecs.umich.edu if l[i] == elt: 1422632Sstever@eecs.umich.edu return i 1432632Sstever@eecs.umich.edu raise ValueError, "element not found" 1442632Sstever@eecs.umich.edu 1453053Sstever@eecs.umich.edu# helper function: compare dotted version numbers. 1463053Sstever@eecs.umich.edu# E.g., compare_version('1.3.25', '1.4.1') 1473053Sstever@eecs.umich.edu# returns -1, 0, 1 if v1 is <, ==, > v2 1483053Sstever@eecs.umich.edudef compare_versions(v1, v2): 1493053Sstever@eecs.umich.edu # Convert dotted strings to lists 1503053Sstever@eecs.umich.edu v1 = map(int, v1.split('.')) 1513053Sstever@eecs.umich.edu v2 = map(int, v2.split('.')) 1523053Sstever@eecs.umich.edu # Compare corresponding elements of lists 1533053Sstever@eecs.umich.edu for n1,n2 in zip(v1, v2): 1543053Sstever@eecs.umich.edu if n1 < n2: return -1 1553053Sstever@eecs.umich.edu if n1 > n2: return 1 1563053Sstever@eecs.umich.edu # all corresponding values are equal... see if one has extra values 1573053Sstever@eecs.umich.edu if len(v1) < len(v2): return -1 1583053Sstever@eecs.umich.edu if len(v1) > len(v2): return 1 1593053Sstever@eecs.umich.edu return 0 1603053Sstever@eecs.umich.edu 1612632Sstever@eecs.umich.edu# Each target must have 'build' in the interior of the path; the 1622632Sstever@eecs.umich.edu# directory below this will determine the build parameters. For 1632632Sstever@eecs.umich.edu# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we 1642632Sstever@eecs.umich.edu# recognize that ALPHA_SE specifies the configuration because it 1652632Sstever@eecs.umich.edu# follow 'build' in the bulid path. 1662632Sstever@eecs.umich.edu 1673718Sstever@eecs.umich.edu# Generate absolute paths to targets so we can see where the build dir is 1683718Sstever@eecs.umich.eduif COMMAND_LINE_TARGETS: 1693718Sstever@eecs.umich.edu # Ask SCons which directory it was invoked from 1703718Sstever@eecs.umich.edu launch_dir = GetLaunchDir() 1713718Sstever@eecs.umich.edu # Make targets relative to invocation directory 1723718Sstever@eecs.umich.edu abs_targets = map(lambda x: os.path.normpath(joinpath(launch_dir, str(x))), 1733718Sstever@eecs.umich.edu COMMAND_LINE_TARGETS) 1743718Sstever@eecs.umich.eduelse: 1753718Sstever@eecs.umich.edu # Default targets are relative to root of tree 1763718Sstever@eecs.umich.edu abs_targets = map(lambda x: os.path.normpath(joinpath(ROOT, str(x))), 1773718Sstever@eecs.umich.edu DEFAULT_TARGETS) 1783718Sstever@eecs.umich.edu 1793718Sstever@eecs.umich.edu 1802634Sstever@eecs.umich.edu# Generate a list of the unique build roots and configs that the 1812634Sstever@eecs.umich.edu# collected targets reference. 1822632Sstever@eecs.umich.edubuild_paths = [] 1832638Sstever@eecs.umich.edubuild_root = None 1842632Sstever@eecs.umich.edufor t in abs_targets: 1852632Sstever@eecs.umich.edu path_dirs = t.split('/') 1862632Sstever@eecs.umich.edu try: 1872632Sstever@eecs.umich.edu build_top = rfind(path_dirs, 'build', -2) 1882632Sstever@eecs.umich.edu except: 1892632Sstever@eecs.umich.edu print "Error: no non-leaf 'build' dir found on target path", t 1901858SN/A Exit(1) 1913716Sstever@eecs.umich.edu this_build_root = joinpath('/',*path_dirs[:build_top+1]) 1922638Sstever@eecs.umich.edu if not build_root: 1932638Sstever@eecs.umich.edu build_root = this_build_root 1942638Sstever@eecs.umich.edu else: 1952638Sstever@eecs.umich.edu if this_build_root != build_root: 1962638Sstever@eecs.umich.edu print "Error: build targets not under same build root\n"\ 1972638Sstever@eecs.umich.edu " %s\n %s" % (build_root, this_build_root) 1982638Sstever@eecs.umich.edu Exit(1) 1993716Sstever@eecs.umich.edu build_path = joinpath('/',*path_dirs[:build_top+2]) 2002634Sstever@eecs.umich.edu if build_path not in build_paths: 2012634Sstever@eecs.umich.edu build_paths.append(build_path) 202955SN/A 203955SN/A################################################### 204955SN/A# 205955SN/A# Set up the default build environment. This environment is copied 206955SN/A# and modified according to each selected configuration. 207955SN/A# 208955SN/A################################################### 209955SN/A 2101858SN/Aenv = Environment(ENV = os.environ, # inherit user's environment vars 2111858SN/A ROOT = ROOT, 2122632Sstever@eecs.umich.edu SRCDIR = SRCDIR) 213955SN/A 2143643Ssaidi@eecs.umich.edu#Parse CC/CXX early so that we use the correct compiler for 2153643Ssaidi@eecs.umich.edu# to test for dependencies/versions/libraries/includes 2163643Ssaidi@eecs.umich.eduif ARGUMENTS.get('CC', None): 2173643Ssaidi@eecs.umich.edu env['CC'] = ARGUMENTS.get('CC') 2183643Ssaidi@eecs.umich.edu 2193643Ssaidi@eecs.umich.eduif ARGUMENTS.get('CXX', None): 2203643Ssaidi@eecs.umich.edu env['CXX'] = ARGUMENTS.get('CXX') 2213643Ssaidi@eecs.umich.edu 2224494Ssaidi@eecs.umich.eduExport('env') 2234494Ssaidi@eecs.umich.edu 2243716Sstever@eecs.umich.eduenv.SConsignFile(joinpath(build_root,"sconsign")) 2251105SN/A 2262667Sstever@eecs.umich.edu# Default duplicate option is to use hard links, but this messes up 2272667Sstever@eecs.umich.edu# when you use emacs to edit a file in the target dir, as emacs moves 2282667Sstever@eecs.umich.edu# file to file~ then copies to file, breaking the link. Symbolic 2292667Sstever@eecs.umich.edu# (soft) links work better. 2302667Sstever@eecs.umich.eduenv.SetOption('duplicate', 'soft-copy') 2312667Sstever@eecs.umich.edu 2321869SN/A# I waffle on this setting... it does avoid a few painful but 2331869SN/A# unnecessary builds, but it also seems to make trivial builds take 2341869SN/A# noticeably longer. 2351869SN/Aif False: 2361869SN/A env.TargetSignatures('content') 2371065SN/A 2382632Sstever@eecs.umich.edu# M5_PLY is used by isa_parser.py to find the PLY package. 2392632Sstever@eecs.umich.eduenv.Append(ENV = { 'M5_PLY' : Dir('ext/ply') }) 2403918Ssaidi@eecs.umich.eduenv['GCC'] = False 2413918Ssaidi@eecs.umich.eduenv['SUNCC'] = False 2423940Ssaidi@eecs.umich.eduenv['ICC'] = False 2433918Ssaidi@eecs.umich.eduenv['GCC'] = subprocess.Popen(env['CXX'] + ' --version', shell=True, 2443918Ssaidi@eecs.umich.edu stdout=subprocess.PIPE, stderr=subprocess.STDOUT, 2453918Ssaidi@eecs.umich.edu close_fds=True).communicate()[0].find('GCC') >= 0 2463918Ssaidi@eecs.umich.eduenv['SUNCC'] = subprocess.Popen(env['CXX'] + ' -V', shell=True, 2473918Ssaidi@eecs.umich.edu stdout=subprocess.PIPE, stderr=subprocess.STDOUT, 2483918Ssaidi@eecs.umich.edu close_fds=True).communicate()[0].find('Sun C++') >= 0 2493940Ssaidi@eecs.umich.eduenv['ICC'] = subprocess.Popen(env['CXX'] + ' -V', shell=True, 2503940Ssaidi@eecs.umich.edu stdout=subprocess.PIPE, stderr=subprocess.STDOUT, 2513940Ssaidi@eecs.umich.edu close_fds=True).communicate()[0].find('Intel') >= 0 2523942Ssaidi@eecs.umich.eduif env['GCC'] + env['SUNCC'] + env['ICC'] > 1: 2533940Ssaidi@eecs.umich.edu print 'Error: How can we have two at the same time?' 2543918Ssaidi@eecs.umich.edu Exit(1) 2553918Ssaidi@eecs.umich.edu 256955SN/A 2571858SN/A# Set up default C++ compiler flags 2583918Ssaidi@eecs.umich.eduif env['GCC']: 2593918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-pipe') 2603918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-fno-strict-aliasing') 2613918Ssaidi@eecs.umich.edu env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef')) 2623940Ssaidi@eecs.umich.eduelif env['ICC']: 2633940Ssaidi@eecs.umich.edu pass #Fix me... add warning flags once we clean up icc warnings 2643918Ssaidi@eecs.umich.eduelif env['SUNCC']: 2653918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-Qoption ccfe') 2663918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-features=gcc') 2673918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-features=extensions') 2683918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-library=stlport4') 2693918Ssaidi@eecs.umich.edu env.Append(CCFLAGS='-xar') 2703918Ssaidi@eecs.umich.edu# env.Append(CCFLAGS='-instances=semiexplicit') 2713918Ssaidi@eecs.umich.eduelse: 2723918Ssaidi@eecs.umich.edu print 'Error: Don\'t know what compiler options to use for your compiler.' 2733940Ssaidi@eecs.umich.edu print ' Please fix SConstruct and src/SConscript and try again.' 2743918Ssaidi@eecs.umich.edu Exit(1) 2753918Ssaidi@eecs.umich.edu 2761851SN/Aif sys.platform == 'cygwin': 2771851SN/A # cygwin has some header file issues... 2781858SN/A env.Append(CCFLAGS=Split("-Wno-uninitialized")) 2792632Sstever@eecs.umich.eduenv.Append(CPPPATH=[Dir('ext/dnet')]) 280955SN/A 2813053Sstever@eecs.umich.edu# Check for SWIG 2823053Sstever@eecs.umich.eduif not env.has_key('SWIG'): 2833053Sstever@eecs.umich.edu print 'Error: SWIG utility not found.' 2843053Sstever@eecs.umich.edu print ' Please install (see http://www.swig.org) and retry.' 2853053Sstever@eecs.umich.edu Exit(1) 2863053Sstever@eecs.umich.edu 2873053Sstever@eecs.umich.edu# Check for appropriate SWIG version 2883053Sstever@eecs.umich.eduswig_version = os.popen('swig -version').read().split() 2893053Sstever@eecs.umich.edu# First 3 words should be "SWIG Version x.y.z" 2904742Sstever@eecs.umich.eduif len(swig_version) < 3 or \ 2914742Sstever@eecs.umich.edu swig_version[0] != 'SWIG' or swig_version[1] != 'Version': 2923053Sstever@eecs.umich.edu print 'Error determining SWIG version.' 2933053Sstever@eecs.umich.edu Exit(1) 2943053Sstever@eecs.umich.edu 2953053Sstever@eecs.umich.edumin_swig_version = '1.3.28' 2963053Sstever@eecs.umich.eduif compare_versions(swig_version[2], min_swig_version) < 0: 2973053Sstever@eecs.umich.edu print 'Error: SWIG version', min_swig_version, 'or newer required.' 2983053Sstever@eecs.umich.edu print ' Installed version:', swig_version[2] 2993053Sstever@eecs.umich.edu Exit(1) 3003053Sstever@eecs.umich.edu 3012667Sstever@eecs.umich.edu# Set up SWIG flags & scanner 3024554Sbinkertn@umich.eduswig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS') 3034554Sbinkertn@umich.eduenv.Append(SWIGFLAGS=swig_flags) 3042667Sstever@eecs.umich.edu 3054554Sbinkertn@umich.edu# filter out all existing swig scanners, they mess up the dependency 3064554Sbinkertn@umich.edu# stuff for some reason 3074554Sbinkertn@umich.eduscanners = [] 3084554Sbinkertn@umich.edufor scanner in env['SCANNERS']: 3094554Sbinkertn@umich.edu skeys = scanner.skeys 3104554Sbinkertn@umich.edu if skeys == '.i': 3114554Sbinkertn@umich.edu continue 3124554Sbinkertn@umich.edu 3134554Sbinkertn@umich.edu if isinstance(skeys, (list, tuple)) and '.i' in skeys: 3144554Sbinkertn@umich.edu continue 3152667Sstever@eecs.umich.edu 3164554Sbinkertn@umich.edu scanners.append(scanner) 3174554Sbinkertn@umich.edu 3184554Sbinkertn@umich.edu# add the new swig scanner that we like better 3194554Sbinkertn@umich.edufrom SCons.Scanner import ClassicCPP as CPPScanner 3202667Sstever@eecs.umich.eduswig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")' 3214554Sbinkertn@umich.eduscanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re)) 3222667Sstever@eecs.umich.edu 3234554Sbinkertn@umich.edu# replace the scanners list that has what we want 3244554Sbinkertn@umich.eduenv['SCANNERS'] = scanners 3252667Sstever@eecs.umich.edu 3262638Sstever@eecs.umich.edu# Platform-specific configuration. Note again that we assume that all 3272638Sstever@eecs.umich.edu# builds under a given build root run on the same host platform. 3282638Sstever@eecs.umich.educonf = Configure(env, 3293716Sstever@eecs.umich.edu conf_dir = joinpath(build_root, '.scons_config'), 3303716Sstever@eecs.umich.edu log_file = joinpath(build_root, 'scons_config.log')) 3311858SN/A 3323118Sstever@eecs.umich.edu# Find Python include and library directories for embedding the 3333118Sstever@eecs.umich.edu# interpreter. For consistency, we will use the same Python 3343118Sstever@eecs.umich.edu# installation used to run scons (and thus this script). If you want 3353118Sstever@eecs.umich.edu# to link in an alternate version, see above for instructions on how 3363118Sstever@eecs.umich.edu# to invoke scons with a different copy of the Python interpreter. 3373118Sstever@eecs.umich.edu 3383118Sstever@eecs.umich.edu# Get brief Python version name (e.g., "python2.4") for locating 3393118Sstever@eecs.umich.edu# include & library files 3403118Sstever@eecs.umich.edupy_version_name = 'python' + sys.version[:3] 3413118Sstever@eecs.umich.edu 3423118Sstever@eecs.umich.edu# include path, e.g. /usr/local/include/python2.4 3433716Sstever@eecs.umich.edupy_header_path = joinpath(sys.exec_prefix, 'include', py_version_name) 3443118Sstever@eecs.umich.eduenv.Append(CPPPATH = py_header_path) 3453118Sstever@eecs.umich.edu# verify that it works 3463118Sstever@eecs.umich.eduif not conf.CheckHeader('Python.h', '<>'): 3473118Sstever@eecs.umich.edu print "Error: can't find Python.h header in", py_header_path 3483118Sstever@eecs.umich.edu Exit(1) 3493118Sstever@eecs.umich.edu 3503118Sstever@eecs.umich.edu# add library path too if it's not in the default place 3513118Sstever@eecs.umich.edupy_lib_path = None 3523118Sstever@eecs.umich.eduif sys.exec_prefix != '/usr': 3533716Sstever@eecs.umich.edu py_lib_path = joinpath(sys.exec_prefix, 'lib') 3543118Sstever@eecs.umich.eduelif sys.platform == 'cygwin': 3553118Sstever@eecs.umich.edu # cygwin puts the .dll in /bin for some reason 3563118Sstever@eecs.umich.edu py_lib_path = '/bin' 3573118Sstever@eecs.umich.eduif py_lib_path: 3583118Sstever@eecs.umich.edu env.Append(LIBPATH = py_lib_path) 3593118Sstever@eecs.umich.edu print 'Adding', py_lib_path, 'to LIBPATH for', py_version_name 3603118Sstever@eecs.umich.eduif not conf.CheckLib(py_version_name): 3613118Sstever@eecs.umich.edu print "Error: can't find Python library", py_version_name 3623118Sstever@eecs.umich.edu Exit(1) 3633118Sstever@eecs.umich.edu 3643483Ssaidi@eecs.umich.edu# On Solaris you need to use libsocket for socket ops 3653494Ssaidi@eecs.umich.eduif not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'): 3663494Ssaidi@eecs.umich.edu if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'): 3673483Ssaidi@eecs.umich.edu print "Can't find library with socket calls (e.g. accept())" 3683483Ssaidi@eecs.umich.edu Exit(1) 3693483Ssaidi@eecs.umich.edu 3703053Sstever@eecs.umich.edu# Check for zlib. If the check passes, libz will be automatically 3713053Sstever@eecs.umich.edu# added to the LIBS environment variable. 3723918Ssaidi@eecs.umich.eduif not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'): 3733053Sstever@eecs.umich.edu print 'Error: did not find needed zlib compression library '\ 3743053Sstever@eecs.umich.edu 'and/or zlib.h header file.' 3753053Sstever@eecs.umich.edu print ' Please install zlib and try again.' 3763053Sstever@eecs.umich.edu Exit(1) 3773053Sstever@eecs.umich.edu 3781858SN/A# Check for <fenv.h> (C99 FP environment control) 3791858SN/Ahave_fenv = conf.CheckHeader('fenv.h', '<>') 3801858SN/Aif not have_fenv: 3811858SN/A print "Warning: Header file <fenv.h> not found." 3821858SN/A print " This host has no IEEE FP rounding mode control." 3831858SN/A 3841859SN/A# Check for mysql. 3851858SN/Amysql_config = WhereIs('mysql_config') 3861858SN/Ahave_mysql = mysql_config != None 3871858SN/A 3881859SN/A# Check MySQL version. 3891859SN/Aif have_mysql: 3901862SN/A mysql_version = os.popen(mysql_config + ' --version').read() 3913053Sstever@eecs.umich.edu min_mysql_version = '4.1' 3923053Sstever@eecs.umich.edu if compare_versions(mysql_version, min_mysql_version) < 0: 3933053Sstever@eecs.umich.edu print 'Warning: MySQL', min_mysql_version, 'or newer required.' 3943053Sstever@eecs.umich.edu print ' Version', mysql_version, 'detected.' 3951859SN/A have_mysql = False 3961859SN/A 3971859SN/A# Set up mysql_config commands. 3981859SN/Aif have_mysql: 3991859SN/A mysql_config_include = mysql_config + ' --include' 4001859SN/A if os.system(mysql_config_include + ' > /dev/null') != 0: 4011859SN/A # older mysql_config versions don't support --include, use 4021859SN/A # --cflags instead 4031862SN/A mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g' 4041859SN/A # This seems to work in all versions 4051859SN/A mysql_config_libs = mysql_config + ' --libs' 4061859SN/A 4071858SN/Aenv = conf.Finish() 4081858SN/A 4092139SN/A# Define the universe of supported ISAs 4104202Sbinkertn@umich.eduall_isa_list = [ ] 4114202Sbinkertn@umich.eduExport('all_isa_list') 4122139SN/A 4132155SN/A# Define the universe of supported CPU models 4144202Sbinkertn@umich.eduall_cpu_list = [ ] 4154202Sbinkertn@umich.edudefault_cpus = [ ] 4164202Sbinkertn@umich.eduExport('all_cpu_list', 'default_cpus') 4172155SN/A 4181869SN/A# Sticky options get saved in the options file so they persist from 4191869SN/A# one invocation to the next (unless overridden, in which case the new 4201869SN/A# value becomes sticky). 4211869SN/Asticky_opts = Options(args=ARGUMENTS) 4224202Sbinkertn@umich.eduExport('sticky_opts') 4234202Sbinkertn@umich.edu 4244202Sbinkertn@umich.edu# Non-sticky options only apply to the current build. 4254202Sbinkertn@umich.edunonsticky_opts = Options(args=ARGUMENTS) 4264202Sbinkertn@umich.eduExport('nonsticky_opts') 4274202Sbinkertn@umich.edu 4284202Sbinkertn@umich.edu# Walk the tree and execute all SConsopts scripts that wil add to the 4294202Sbinkertn@umich.edu# above options 4304202Sbinkertn@umich.edufor root, dirs, files in os.walk('.'): 4314202Sbinkertn@umich.edu if 'SConsopts' in files: 4324202Sbinkertn@umich.edu SConscript(os.path.join(root, 'SConsopts')) 4334202Sbinkertn@umich.edu 4344202Sbinkertn@umich.eduall_isa_list.sort() 4354202Sbinkertn@umich.eduall_cpu_list.sort() 4364202Sbinkertn@umich.edudefault_cpus.sort() 4374202Sbinkertn@umich.edu 4384773Snate@binkert.orgdef ExtraPathValidator(key, val, env): 4394775Snate@binkert.org if not val: 4404775Snate@binkert.org return 4414773Snate@binkert.org paths = val.split(':') 4424773Snate@binkert.org for path in paths: 4434773Snate@binkert.org path = os.path.expanduser(path) 4444773Snate@binkert.org if not isdir(path): 4454773Snate@binkert.org raise AttributeError, "Invalid path: '%s'" % path 4464773Snate@binkert.org 4471869SN/Asticky_opts.AddOptions( 4484202Sbinkertn@umich.edu EnumOption('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list), 4491869SN/A BoolOption('FULL_SYSTEM', 'Full-system support', False), 4502508SN/A # There's a bug in scons 0.96.1 that causes ListOptions with list 4512508SN/A # values (more than one value) not to be able to be restored from 4522508SN/A # a saved option file. If this causes trouble then upgrade to 4532508SN/A # scons 0.96.90 or later. 4544202Sbinkertn@umich.edu ListOption('CPU_MODELS', 'CPU models', default_cpus, all_cpu_list), 4551869SN/A BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False), 4561869SN/A BoolOption('EFENCE', 'Link with Electric Fence malloc debugger', 4571869SN/A False), 4581869SN/A BoolOption('SS_COMPATIBLE_FP', 4591869SN/A 'Make floating-point results compatible with SimpleScalar', 4601869SN/A False), 4611965SN/A BoolOption('USE_SSE2', 4621965SN/A 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts', 4631965SN/A False), 4641869SN/A BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql), 4651869SN/A BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv), 4662733Sktlim@umich.edu BoolOption('USE_CHECKER', 'Use checker for detailed CPU models', False), 4671869SN/A ('CC', 'C compiler', os.environ.get('CC', env['CC'])), 4681884SN/A ('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])), 4691884SN/A BoolOption('BATCH', 'Use batch pool for build and tests', False), 4703356Sbinkertn@umich.edu ('BATCH_CMD', 'Batch pool submission command name', 'qdo'), 4713356Sbinkertn@umich.edu ('PYTHONHOME', 4723356Sbinkertn@umich.edu 'Override the default PYTHONHOME for this system (use with caution)', 4734773Snate@binkert.org '%s:%s' % (sys.prefix, sys.exec_prefix)), 4744773Snate@binkert.org ('EXTRAS', 'Add Extra directories to the compilation', '', 4754773Snate@binkert.org ExtraPathValidator) 4761869SN/A ) 4771858SN/A 4781869SN/Anonsticky_opts.AddOptions( 4791869SN/A BoolOption('update_ref', 'Update test reference outputs', False) 4801869SN/A ) 4811858SN/A 4822761Sstever@eecs.umich.edu# These options get exported to #defines in config/*.hh (see src/SConscript). 4831869SN/Aenv.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \ 4842733Sktlim@umich.edu 'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \ 4853584Ssaidi@eecs.umich.edu 'USE_CHECKER', 'PYTHONHOME', 'TARGET_ISA'] 4861869SN/A 4871869SN/A# Define a handy 'no-op' action 4881869SN/Adef no_action(target, source, env): 4891869SN/A return 0 4901869SN/A 4911869SN/Aenv.NoAction = Action(no_action, None) 4921858SN/A 493955SN/A################################################### 494955SN/A# 4951869SN/A# Define a SCons builder for configuration flag headers. 4961869SN/A# 4971869SN/A################################################### 4981869SN/A 4991869SN/A# This function generates a config header file that #defines the 5001869SN/A# option symbol to the current option setting (0 or 1). The source 5011869SN/A# operands are the name of the option and a Value node containing the 5021869SN/A# value of the option. 5031869SN/Adef build_config_file(target, source, env): 5041869SN/A (option, value) = [s.get_contents() for s in source] 5051869SN/A f = file(str(target[0]), 'w') 5061869SN/A print >> f, '#define', option, value 5071869SN/A f.close() 5081869SN/A return None 5091869SN/A 5101869SN/A# Generate the message to be printed when building the config file. 5111869SN/Adef build_config_file_string(target, source, env): 5121869SN/A (option, value) = [s.get_contents() for s in source] 5131869SN/A return "Defining %s as %s in %s." % (option, value, target[0]) 5141869SN/A 5151869SN/A# Combine the two functions into a scons Action object. 5161869SN/Aconfig_action = Action(build_config_file, build_config_file_string) 5171869SN/A 5181869SN/A# The emitter munges the source & target node lists to reflect what 5191869SN/A# we're really doing. 5201869SN/Adef config_emitter(target, source, env): 5211869SN/A # extract option name from Builder arg 5221869SN/A option = str(target[0]) 5231869SN/A # True target is config header file 5243716Sstever@eecs.umich.edu target = joinpath('config', option.lower() + '.hh') 5253356Sbinkertn@umich.edu val = env[option] 5263356Sbinkertn@umich.edu if isinstance(val, bool): 5273356Sbinkertn@umich.edu # Force value to 0/1 5283356Sbinkertn@umich.edu val = int(val) 5293356Sbinkertn@umich.edu elif isinstance(val, str): 5303356Sbinkertn@umich.edu val = '"' + val + '"' 5313356Sbinkertn@umich.edu 5321869SN/A # Sources are option name & value (packaged in SCons Value nodes) 5331869SN/A return ([target], [Value(option), Value(val)]) 5341869SN/A 5351869SN/Aconfig_builder = Builder(emitter = config_emitter, action = config_action) 5361869SN/A 5371869SN/Aenv.Append(BUILDERS = { 'ConfigFile' : config_builder }) 5381869SN/A 5392655Sstever@eecs.umich.edu################################################### 5402655Sstever@eecs.umich.edu# 5412655Sstever@eecs.umich.edu# Define a SCons builder for copying files. This is used by the 5422655Sstever@eecs.umich.edu# Python zipfile code in src/python/SConscript, but is placed up here 5432655Sstever@eecs.umich.edu# since it's potentially more generally applicable. 5442655Sstever@eecs.umich.edu# 5452655Sstever@eecs.umich.edu################################################### 5462655Sstever@eecs.umich.edu 5472655Sstever@eecs.umich.educopy_builder = Builder(action = Copy("$TARGET", "$SOURCE")) 5482655Sstever@eecs.umich.edu 5492655Sstever@eecs.umich.eduenv.Append(BUILDERS = { 'CopyFile' : copy_builder }) 5502655Sstever@eecs.umich.edu 5512655Sstever@eecs.umich.edu################################################### 5522655Sstever@eecs.umich.edu# 5532655Sstever@eecs.umich.edu# Define a simple SCons builder to concatenate files. 5542655Sstever@eecs.umich.edu# 5552655Sstever@eecs.umich.edu# Used to append the Python zip archive to the executable. 5562655Sstever@eecs.umich.edu# 5572655Sstever@eecs.umich.edu################################################### 5582655Sstever@eecs.umich.edu 5592655Sstever@eecs.umich.educoncat_builder = Builder(action = Action(['cat $SOURCES > $TARGET', 5602655Sstever@eecs.umich.edu 'chmod +x $TARGET'])) 5612655Sstever@eecs.umich.edu 5622655Sstever@eecs.umich.eduenv.Append(BUILDERS = { 'Concat' : concat_builder }) 5632655Sstever@eecs.umich.edu 5642655Sstever@eecs.umich.edu 5652634Sstever@eecs.umich.edu# base help text 5662634Sstever@eecs.umich.eduhelp_text = ''' 5672634Sstever@eecs.umich.eduUsage: scons [scons options] [build options] [target(s)] 5682634Sstever@eecs.umich.edu 5692634Sstever@eecs.umich.edu''' 5702634Sstever@eecs.umich.edu 5712638Sstever@eecs.umich.edu# libelf build is shared across all configs in the build root. 5722638Sstever@eecs.umich.eduenv.SConscript('ext/libelf/SConscript', 5733716Sstever@eecs.umich.edu build_dir = joinpath(build_root, 'libelf'), 5742638Sstever@eecs.umich.edu exports = 'env') 5752638Sstever@eecs.umich.edu 5761869SN/A################################################### 5771869SN/A# 5783546Sgblack@eecs.umich.edu# This function is used to set up a directory with switching headers 5793546Sgblack@eecs.umich.edu# 5803546Sgblack@eecs.umich.edu################################################### 5813546Sgblack@eecs.umich.edu 5824202Sbinkertn@umich.eduenv['ALL_ISA_LIST'] = all_isa_list 5833546Sgblack@eecs.umich.edudef make_switching_dir(dirname, switch_headers, env): 5843546Sgblack@eecs.umich.edu # Generate the header. target[0] is the full path of the output 5853546Sgblack@eecs.umich.edu # header to generate. 'source' is a dummy variable, since we get the 5863546Sgblack@eecs.umich.edu # list of ISAs from env['ALL_ISA_LIST']. 5873546Sgblack@eecs.umich.edu def gen_switch_hdr(target, source, env): 5883546Sgblack@eecs.umich.edu fname = str(target[0]) 5893546Sgblack@eecs.umich.edu basename = os.path.basename(fname) 5903546Sgblack@eecs.umich.edu f = open(fname, 'w') 5913546Sgblack@eecs.umich.edu f.write('#include "arch/isa_specific.hh"\n') 5923546Sgblack@eecs.umich.edu cond = '#if' 5934202Sbinkertn@umich.edu for isa in all_isa_list: 5943546Sgblack@eecs.umich.edu f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n' 5953546Sgblack@eecs.umich.edu % (cond, isa.upper(), dirname, isa, basename)) 5963546Sgblack@eecs.umich.edu cond = '#elif' 5973546Sgblack@eecs.umich.edu f.write('#else\n#error "THE_ISA not set"\n#endif\n') 5983546Sgblack@eecs.umich.edu f.close() 5993546Sgblack@eecs.umich.edu return 0 6003546Sgblack@eecs.umich.edu 6013546Sgblack@eecs.umich.edu # String to print when generating header 6023546Sgblack@eecs.umich.edu def gen_switch_hdr_string(target, source, env): 6033546Sgblack@eecs.umich.edu return "Generating switch header " + str(target[0]) 6043546Sgblack@eecs.umich.edu 6053546Sgblack@eecs.umich.edu # Build SCons Action object. 'varlist' specifies env vars that this 6063546Sgblack@eecs.umich.edu # action depends on; when env['ALL_ISA_LIST'] changes these actions 6073546Sgblack@eecs.umich.edu # should get re-executed. 6083546Sgblack@eecs.umich.edu switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string, 6093546Sgblack@eecs.umich.edu varlist=['ALL_ISA_LIST']) 6103546Sgblack@eecs.umich.edu 6113546Sgblack@eecs.umich.edu # Instantiate actions for each header 6123546Sgblack@eecs.umich.edu for hdr in switch_headers: 6133546Sgblack@eecs.umich.edu env.Command(hdr, [], switch_hdr_action) 6144202Sbinkertn@umich.eduExport('make_switching_dir') 6153546Sgblack@eecs.umich.edu 6163546Sgblack@eecs.umich.edu################################################### 6173546Sgblack@eecs.umich.edu# 618955SN/A# Define build environments for selected configurations. 619955SN/A# 620955SN/A################################################### 621955SN/A 6221858SN/A# rename base env 6231858SN/Abase_env = env 6241858SN/A 6252632Sstever@eecs.umich.edufor build_path in build_paths: 6262632Sstever@eecs.umich.edu print "Building in", build_path 6274773Snate@binkert.org env['BUILDDIR'] = build_path 6284773Snate@binkert.org 6292632Sstever@eecs.umich.edu # build_dir is the tail component of build path, and is used to 6302632Sstever@eecs.umich.edu # determine the build parameters (e.g., 'ALPHA_SE') 6312632Sstever@eecs.umich.edu (build_root, build_dir) = os.path.split(build_path) 6322634Sstever@eecs.umich.edu # Make a copy of the build-root environment to use for this config. 6332638Sstever@eecs.umich.edu env = base_env.Copy() 6342023SN/A 6352632Sstever@eecs.umich.edu # Set env options according to the build directory config. 6362632Sstever@eecs.umich.edu sticky_opts.files = [] 6372632Sstever@eecs.umich.edu # Options for $BUILD_ROOT/$BUILD_DIR are stored in 6382632Sstever@eecs.umich.edu # $BUILD_ROOT/options/$BUILD_DIR so you can nuke 6392632Sstever@eecs.umich.edu # $BUILD_ROOT/$BUILD_DIR without losing your options settings. 6403716Sstever@eecs.umich.edu current_opts_file = joinpath(build_root, 'options', build_dir) 6412632Sstever@eecs.umich.edu if os.path.isfile(current_opts_file): 6422632Sstever@eecs.umich.edu sticky_opts.files.append(current_opts_file) 6432632Sstever@eecs.umich.edu print "Using saved options file %s" % current_opts_file 6442632Sstever@eecs.umich.edu else: 6452632Sstever@eecs.umich.edu # Build dir-specific options file doesn't exist. 6462023SN/A 6472632Sstever@eecs.umich.edu # Make sure the directory is there so we can create it later 6482632Sstever@eecs.umich.edu opt_dir = os.path.dirname(current_opts_file) 6491889SN/A if not os.path.isdir(opt_dir): 6501889SN/A os.mkdir(opt_dir) 6512632Sstever@eecs.umich.edu 6522632Sstever@eecs.umich.edu # Get default build options from source tree. Options are 6532632Sstever@eecs.umich.edu # normally determined by name of $BUILD_DIR, but can be 6542632Sstever@eecs.umich.edu # overriden by 'default=' arg on command line. 6553716Sstever@eecs.umich.edu default_opts_file = joinpath('build_opts', 6563716Sstever@eecs.umich.edu ARGUMENTS.get('default', build_dir)) 6572632Sstever@eecs.umich.edu if os.path.isfile(default_opts_file): 6582632Sstever@eecs.umich.edu sticky_opts.files.append(default_opts_file) 6592632Sstever@eecs.umich.edu print "Options file %s not found,\n using defaults in %s" \ 6602632Sstever@eecs.umich.edu % (current_opts_file, default_opts_file) 6612632Sstever@eecs.umich.edu else: 6622632Sstever@eecs.umich.edu print "Error: cannot find options file %s or %s" \ 6632632Sstever@eecs.umich.edu % (current_opts_file, default_opts_file) 6642632Sstever@eecs.umich.edu Exit(1) 6651888SN/A 6661888SN/A # Apply current option settings to env 6671869SN/A sticky_opts.Update(env) 6681869SN/A nonsticky_opts.Update(env) 6691858SN/A 6702598SN/A help_text += "Sticky options for %s:\n" % build_dir \ 6712598SN/A + sticky_opts.GenerateHelpText(env) \ 6722598SN/A + "\nNon-sticky options for %s:\n" % build_dir \ 6732598SN/A + nonsticky_opts.GenerateHelpText(env) 6742598SN/A 6751858SN/A # Process option settings. 6761858SN/A 6771858SN/A if not have_fenv and env['USE_FENV']: 6781858SN/A print "Warning: <fenv.h> not available; " \ 6791858SN/A "forcing USE_FENV to False in", build_dir + "." 6801858SN/A env['USE_FENV'] = False 6811858SN/A 6821858SN/A if not env['USE_FENV']: 6831858SN/A print "Warning: No IEEE FP rounding mode control in", build_dir + "." 6841871SN/A print " FP results may deviate slightly from other platforms." 6851858SN/A 6861858SN/A if env['EFENCE']: 6871858SN/A env.Append(LIBS=['efence']) 6881858SN/A 6891858SN/A if env['USE_MYSQL']: 6901858SN/A if not have_mysql: 6911858SN/A print "Warning: MySQL not available; " \ 6921858SN/A "forcing USE_MYSQL to False in", build_dir + "." 6931858SN/A env['USE_MYSQL'] = False 6941858SN/A else: 6951858SN/A print "Compiling in", build_dir, "with MySQL support." 6961859SN/A env.ParseConfig(mysql_config_libs) 6971859SN/A env.ParseConfig(mysql_config_include) 6981869SN/A 6991888SN/A # Save sticky option settings back to current options file 7002632Sstever@eecs.umich.edu sticky_opts.Save(current_opts_file, env) 7011869SN/A 7021884SN/A # Do this after we save setting back, or else we'll tack on an 7031884SN/A # extra 'qdo' every time we run scons. 7041884SN/A if env['BATCH']: 7051884SN/A env['CC'] = env['BATCH_CMD'] + ' ' + env['CC'] 7061884SN/A env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX'] 7071884SN/A 7081965SN/A if env['USE_SSE2']: 7091965SN/A env.Append(CCFLAGS='-msse2') 7101965SN/A 7112761Sstever@eecs.umich.edu # The src/SConscript file sets up the build rules in 'env' according 7121869SN/A # to the configured options. It returns a list of environments, 7131869SN/A # one for each variant build (debug, opt, etc.) 7142632Sstever@eecs.umich.edu envList = SConscript('src/SConscript', build_dir = build_path, 7152667Sstever@eecs.umich.edu exports = 'env') 7161869SN/A 7171869SN/A # Set up the regression tests for each build. 7182929Sktlim@umich.edu for e in envList: 7192929Sktlim@umich.edu SConscript('tests/SConscript', 7203716Sstever@eecs.umich.edu build_dir = joinpath(build_path, 'tests', e.Label), 7212929Sktlim@umich.edu exports = { 'env' : e }, duplicate = False) 722955SN/A 7232598SN/AHelp(help_text) 7242598SN/A 7253546Sgblack@eecs.umich.edu 726955SN/A################################################### 727955SN/A# 728955SN/A# Let SCons do its thing. At this point SCons will use the defined 7291530SN/A# build environments to build the requested targets. 730955SN/A# 731955SN/A################################################### 732955SN/A 733