SConstruct revision 8887
1955SN/A# -*- mode:python -*-
2955SN/A
37816Ssteve.reinhardt@amd.com# Copyright (c) 2011 Advanced Micro Devices, Inc.
45871Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company
51762SN/A# Copyright (c) 2004-2005 The Regents of The University of Michigan
6955SN/A# All rights reserved.
7955SN/A#
8955SN/A# Redistribution and use in source and binary forms, with or without
9955SN/A# modification, are permitted provided that the following conditions are
10955SN/A# met: redistributions of source code must retain the above copyright
11955SN/A# notice, this list of conditions and the following disclaimer;
12955SN/A# redistributions in binary form must reproduce the above copyright
13955SN/A# notice, this list of conditions and the following disclaimer in the
14955SN/A# documentation and/or other materials provided with the distribution;
15955SN/A# neither the name of the copyright holders nor the names of its
16955SN/A# contributors may be used to endorse or promote products derived from
17955SN/A# this software without specific prior written permission.
18955SN/A#
19955SN/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20955SN/A# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21955SN/A# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22955SN/A# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23955SN/A# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24955SN/A# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25955SN/A# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26955SN/A# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27955SN/A# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28955SN/A# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29955SN/A# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
302665Ssaidi@eecs.umich.edu#
312665Ssaidi@eecs.umich.edu# Authors: Steve Reinhardt
325863Snate@binkert.org#          Nathan Binkert
33955SN/A
34955SN/A###################################################
35955SN/A#
36955SN/A# SCons top-level build description (SConstruct) file.
37955SN/A#
388878Ssteve.reinhardt@amd.com# While in this directory ('gem5'), just type 'scons' to build the default
392632Sstever@eecs.umich.edu# configuration (see below), or type 'scons build/<CONFIG>/<binary>'
408878Ssteve.reinhardt@amd.com# to build some other configuration (e.g., 'build/ALPHA/gem5.opt' for
412632Sstever@eecs.umich.edu# the optimized full-system version).
42955SN/A#
438878Ssteve.reinhardt@amd.com# You can build gem5 in a different directory as long as there is a
442632Sstever@eecs.umich.edu# 'build/<CONFIG>' somewhere along the target path.  The build system
452761Sstever@eecs.umich.edu# expects that all configs under the same build directory are being
462632Sstever@eecs.umich.edu# built for the same host system.
472632Sstever@eecs.umich.edu#
482632Sstever@eecs.umich.edu# Examples:
492761Sstever@eecs.umich.edu#
502761Sstever@eecs.umich.edu#   The following two commands are equivalent.  The '-u' option tells
512761Sstever@eecs.umich.edu#   scons to search up the directory tree for this SConstruct file.
528878Ssteve.reinhardt@amd.com#   % cd <path-to-src>/gem5 ; scons build/ALPHA/gem5.debug
538878Ssteve.reinhardt@amd.com#   % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.debug
542761Sstever@eecs.umich.edu#
552761Sstever@eecs.umich.edu#   The following two commands are equivalent and demonstrate building
562761Sstever@eecs.umich.edu#   in a directory outside of the source tree.  The '-C' option tells
572761Sstever@eecs.umich.edu#   scons to chdir to the specified directory to find this SConstruct
582761Sstever@eecs.umich.edu#   file.
598878Ssteve.reinhardt@amd.com#   % cd <path-to-src>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug
608878Ssteve.reinhardt@amd.com#   % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug
612632Sstever@eecs.umich.edu#
622632Sstever@eecs.umich.edu# You can use 'scons -H' to print scons options.  If you're in this
638878Ssteve.reinhardt@amd.com# 'gem5' directory (or use -u or -C to tell scons where to find this
648878Ssteve.reinhardt@amd.com# file), you can use 'scons -h' to print all the gem5-specific build
652632Sstever@eecs.umich.edu# options as well.
66955SN/A#
67955SN/A###################################################
68955SN/A
695863Snate@binkert.org# Check for recent-enough Python and SCons versions.
705863Snate@binkert.orgtry:
715863Snate@binkert.org    # Really old versions of scons only take two options for the
725863Snate@binkert.org    # function, so check once without the revision and once with the
735863Snate@binkert.org    # revision, the first instance will fail for stuff other than
745863Snate@binkert.org    # 0.98, and the second will fail for 0.98.0
755863Snate@binkert.org    EnsureSConsVersion(0, 98)
765863Snate@binkert.org    EnsureSConsVersion(0, 98, 1)
775863Snate@binkert.orgexcept SystemExit, e:
785863Snate@binkert.org    print """
795863Snate@binkert.orgFor more details, see:
808878Ssteve.reinhardt@amd.com    http://gem5.org/Dependencies
815863Snate@binkert.org"""
825863Snate@binkert.org    raise
835863Snate@binkert.org
845863Snate@binkert.org# We ensure the python version early because we have stuff that
855863Snate@binkert.org# requires python 2.4
865863Snate@binkert.orgtry:
875863Snate@binkert.org    EnsurePythonVersion(2, 4)
885863Snate@binkert.orgexcept SystemExit, e:
895863Snate@binkert.org    print """
905863Snate@binkert.orgYou can use a non-default installation of the Python interpreter by
915863Snate@binkert.orgeither (1) rearranging your PATH so that scons finds the non-default
925863Snate@binkert.org'python' first or (2) explicitly invoking an alternative interpreter
935863Snate@binkert.orgon the scons script.
945863Snate@binkert.org
955863Snate@binkert.orgFor more details, see:
968878Ssteve.reinhardt@amd.com    http://gem5.org/wiki/index.php/Using_a_non-default_Python_installation
975863Snate@binkert.org"""
985863Snate@binkert.org    raise
995863Snate@binkert.org
1006654Snate@binkert.org# Global Python includes
101955SN/Aimport os
1025396Ssaidi@eecs.umich.eduimport re
1035863Snate@binkert.orgimport subprocess
1045863Snate@binkert.orgimport sys
1054202Sbinkertn@umich.edu
1065863Snate@binkert.orgfrom os import mkdir, environ
1075863Snate@binkert.orgfrom os.path import abspath, basename, dirname, expanduser, normpath
1085863Snate@binkert.orgfrom os.path import exists,  isdir, isfile
1095863Snate@binkert.orgfrom os.path import join as joinpath, split as splitpath
110955SN/A
1116654Snate@binkert.org# SCons includes
1125273Sstever@gmail.comimport SCons
1135871Snate@binkert.orgimport SCons.Node
1145273Sstever@gmail.com
1156655Snate@binkert.orgextra_python_paths = [
1168878Ssteve.reinhardt@amd.com    Dir('src/python').srcnode().abspath, # gem5 includes
1176655Snate@binkert.org    Dir('ext/ply').srcnode().abspath, # ply is used by several files
1186655Snate@binkert.org    ]
1196655Snate@binkert.org    
1206655Snate@binkert.orgsys.path[1:1] = extra_python_paths
1215871Snate@binkert.org
1226654Snate@binkert.orgfrom m5.util import compareVersions, readCommand
1235396Ssaidi@eecs.umich.edu
1248120Sgblack@eecs.umich.eduhelp_texts = {
1258120Sgblack@eecs.umich.edu    "options" : "",
1268120Sgblack@eecs.umich.edu    "global_vars" : "",
1278120Sgblack@eecs.umich.edu    "local_vars" : ""
1288120Sgblack@eecs.umich.edu}
1298120Sgblack@eecs.umich.edu
1308120Sgblack@eecs.umich.eduExport("help_texts")
1318120Sgblack@eecs.umich.edu
1328879Ssteve.reinhardt@amd.com
1338879Ssteve.reinhardt@amd.com# There's a bug in scons in that (1) by default, the help texts from
1348879Ssteve.reinhardt@amd.com# AddOption() are supposed to be displayed when you type 'scons -h'
1358879Ssteve.reinhardt@amd.com# and (2) you can override the help displayed by 'scons -h' using the
1368879Ssteve.reinhardt@amd.com# Help() function, but these two features are incompatible: once
1378879Ssteve.reinhardt@amd.com# you've overridden the help text using Help(), there's no way to get
1388879Ssteve.reinhardt@amd.com# at the help texts from AddOptions.  See:
1398879Ssteve.reinhardt@amd.com#     http://scons.tigris.org/issues/show_bug.cgi?id=2356
1408879Ssteve.reinhardt@amd.com#     http://scons.tigris.org/issues/show_bug.cgi?id=2611
1418879Ssteve.reinhardt@amd.com# This hack lets us extract the help text from AddOptions and
1428879Ssteve.reinhardt@amd.com# re-inject it via Help().  Ideally someday this bug will be fixed and
1438879Ssteve.reinhardt@amd.com# we can just use AddOption directly.
1448879Ssteve.reinhardt@amd.comdef AddLocalOption(*args, **kwargs):
1458120Sgblack@eecs.umich.edu    col_width = 30
1468120Sgblack@eecs.umich.edu
1478120Sgblack@eecs.umich.edu    help = "  " + ", ".join(args)
1488120Sgblack@eecs.umich.edu    if "help" in kwargs:
1498120Sgblack@eecs.umich.edu        length = len(help)
1508120Sgblack@eecs.umich.edu        if length >= col_width:
1518120Sgblack@eecs.umich.edu            help += "\n" + " " * col_width
1528120Sgblack@eecs.umich.edu        else:
1538120Sgblack@eecs.umich.edu            help += " " * (col_width - length)
1548120Sgblack@eecs.umich.edu        help += kwargs["help"]
1558120Sgblack@eecs.umich.edu    help_texts["options"] += help + "\n"
1568120Sgblack@eecs.umich.edu
1578120Sgblack@eecs.umich.edu    AddOption(*args, **kwargs)
1588120Sgblack@eecs.umich.edu
1598879Ssteve.reinhardt@amd.comAddLocalOption('--colors', dest='use_colors', action='store_true',
1608879Ssteve.reinhardt@amd.com               help="Add color to abbreviated scons output")
1618879Ssteve.reinhardt@amd.comAddLocalOption('--no-colors', dest='use_colors', action='store_false',
1628879Ssteve.reinhardt@amd.com               help="Don't add color to abbreviated scons output")
1638879Ssteve.reinhardt@amd.comAddLocalOption('--default', dest='default', type='string', action='store',
1648879Ssteve.reinhardt@amd.com               help='Override which build_opts file to use for defaults')
1658879Ssteve.reinhardt@amd.comAddLocalOption('--ignore-style', dest='ignore_style', action='store_true',
1668879Ssteve.reinhardt@amd.com               help='Disable style checking hooks')
1678879Ssteve.reinhardt@amd.comAddLocalOption('--update-ref', dest='update_ref', action='store_true',
1688879Ssteve.reinhardt@amd.com               help='Update test reference outputs')
1698879Ssteve.reinhardt@amd.comAddLocalOption('--verbose', dest='verbose', action='store_true',
1708879Ssteve.reinhardt@amd.com               help='Print full tool command lines')
1718120Sgblack@eecs.umich.edu
1727816Ssteve.reinhardt@amd.comuse_colors = GetOption('use_colors')
1737816Ssteve.reinhardt@amd.comif use_colors:
1747816Ssteve.reinhardt@amd.com    from m5.util.terminal import termcap
1757816Ssteve.reinhardt@amd.comelif use_colors is None:
1767816Ssteve.reinhardt@amd.com    # option unspecified; default behavior is to use colors iff isatty
1777816Ssteve.reinhardt@amd.com    from m5.util.terminal import tty_termcap as termcap
1787816Ssteve.reinhardt@amd.comelse:
1797816Ssteve.reinhardt@amd.com    from m5.util.terminal import no_termcap as termcap
1807816Ssteve.reinhardt@amd.com
1815871Snate@binkert.org########################################################################
1825871Snate@binkert.org#
1836121Snate@binkert.org# Set up the main build environment.
1845871Snate@binkert.org#
1855871Snate@binkert.org########################################################################
1866003Snate@binkert.orguse_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
1876655Snate@binkert.org                 'PYTHONPATH', 'RANLIB' ])
188955SN/A
1895871Snate@binkert.orguse_env = {}
1905871Snate@binkert.orgfor key,val in os.environ.iteritems():
1915871Snate@binkert.org    if key in use_vars or key.startswith("M5"):
1925871Snate@binkert.org        use_env[key] = val
193955SN/A
1946121Snate@binkert.orgmain = Environment(ENV=use_env)
1958881Smarc.orr@gmail.commain.Decider('MD5-timestamp')
1968881Smarc.orr@gmail.commain.SetOption('implicit_cache', 1)
1976121Snate@binkert.orgmain.root = Dir(".")         # The current directory (where this file lives).
1986121Snate@binkert.orgmain.srcdir = Dir("src")     # The source directory
1991533SN/A
2006655Snate@binkert.org# add useful python code PYTHONPATH so it can be used by subprocesses
2016655Snate@binkert.org# as well
2026655Snate@binkert.orgmain.AppendENVPath('PYTHONPATH', extra_python_paths)
2036655Snate@binkert.org
2045871Snate@binkert.org########################################################################
2055871Snate@binkert.org#
2065863Snate@binkert.org# Mercurial Stuff.
2075871Snate@binkert.org#
2088878Ssteve.reinhardt@amd.com# If the gem5 directory is a mercurial repository, we should do some
2095871Snate@binkert.org# extra things.
2105871Snate@binkert.org#
2115871Snate@binkert.org########################################################################
2125863Snate@binkert.org
2136121Snate@binkert.orghgdir = main.root.Dir(".hg")
2145863Snate@binkert.org
2155871Snate@binkert.orgmercurial_style_message = """
2168336Ssteve.reinhardt@amd.comYou're missing the gem5 style hook, which automatically checks your code
2178336Ssteve.reinhardt@amd.comagainst the gem5 style rules on hg commit and qrefresh commands.  This
2188336Ssteve.reinhardt@amd.comscript will now install the hook in your .hg/hgrc file.
2198336Ssteve.reinhardt@amd.comPress enter to continue, or ctrl-c to abort: """
2204678Snate@binkert.org
2218336Ssteve.reinhardt@amd.commercurial_style_hook = """
2228336Ssteve.reinhardt@amd.com# The following lines were automatically added by gem5/SConstruct
2238336Ssteve.reinhardt@amd.com# to provide the gem5 style-checking hooks
2244678Snate@binkert.org[extensions]
2254678Snate@binkert.orgstyle = %s/util/style.py
2264678Snate@binkert.org
2274678Snate@binkert.org[hooks]
2287827Snate@binkert.orgpretxncommit.style = python:style.check_style
2297827Snate@binkert.orgpre-qrefresh.style = python:style.check_style
2308336Ssteve.reinhardt@amd.com# End of SConstruct additions
2314678Snate@binkert.org
2328336Ssteve.reinhardt@amd.com""" % (main.root.abspath)
2338336Ssteve.reinhardt@amd.com
2348336Ssteve.reinhardt@amd.commercurial_lib_not_found = """
2358336Ssteve.reinhardt@amd.comMercurial libraries cannot be found, ignoring style hook.  If
2368336Ssteve.reinhardt@amd.comyou are a gem5 developer, please fix this and run the style
2378336Ssteve.reinhardt@amd.comhook. It is important.
2385871Snate@binkert.org"""
2395871Snate@binkert.org
2408336Ssteve.reinhardt@amd.com# Check for style hook and prompt for installation if it's not there.
2418336Ssteve.reinhardt@amd.com# Skip this if --ignore-style was specified, there's no .hg dir to
2428336Ssteve.reinhardt@amd.com# install a hook in, or there's no interactive terminal to prompt.
2438336Ssteve.reinhardt@amd.comif not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty():
2448336Ssteve.reinhardt@amd.com    style_hook = True
2455871Snate@binkert.org    try:
2468336Ssteve.reinhardt@amd.com        from mercurial import ui
2478336Ssteve.reinhardt@amd.com        ui = ui.ui()
2488336Ssteve.reinhardt@amd.com        ui.readconfig(hgdir.File('hgrc').abspath)
2498336Ssteve.reinhardt@amd.com        style_hook = ui.config('hooks', 'pretxncommit.style', None) and \
2508336Ssteve.reinhardt@amd.com                     ui.config('hooks', 'pre-qrefresh.style', None)
2514678Snate@binkert.org    except ImportError:
2525871Snate@binkert.org        print mercurial_lib_not_found
2534678Snate@binkert.org
2548336Ssteve.reinhardt@amd.com    if not style_hook:
2558336Ssteve.reinhardt@amd.com        print mercurial_style_message,
2568336Ssteve.reinhardt@amd.com        # continue unless user does ctrl-c/ctrl-d etc.
2578336Ssteve.reinhardt@amd.com        try:
2588336Ssteve.reinhardt@amd.com            raw_input()
2598336Ssteve.reinhardt@amd.com        except:
2608336Ssteve.reinhardt@amd.com            print "Input exception, exiting scons.\n"
2618336Ssteve.reinhardt@amd.com            sys.exit(1)
2628336Ssteve.reinhardt@amd.com        hgrc_path = '%s/.hg/hgrc' % main.root.abspath
2638336Ssteve.reinhardt@amd.com        print "Adding style hook to", hgrc_path, "\n"
2648336Ssteve.reinhardt@amd.com        try:
2658336Ssteve.reinhardt@amd.com            hgrc = open(hgrc_path, 'a')
2668336Ssteve.reinhardt@amd.com            hgrc.write(mercurial_style_hook)
2678336Ssteve.reinhardt@amd.com            hgrc.close()
2688336Ssteve.reinhardt@amd.com        except:
2698336Ssteve.reinhardt@amd.com            print "Error updating", hgrc_path
2708336Ssteve.reinhardt@amd.com            sys.exit(1)
2715871Snate@binkert.org
2726121Snate@binkert.org
273955SN/A###################################################
274955SN/A#
2752632Sstever@eecs.umich.edu# Figure out which configurations to set up based on the path(s) of
2762632Sstever@eecs.umich.edu# the target(s).
277955SN/A#
278955SN/A###################################################
279955SN/A
280955SN/A# Find default configuration & binary.
2818878Ssteve.reinhardt@amd.comDefault(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug'))
282955SN/A
2832632Sstever@eecs.umich.edu# helper function: find last occurrence of element in list
2842632Sstever@eecs.umich.edudef rfind(l, elt, offs = -1):
2852632Sstever@eecs.umich.edu    for i in range(len(l)+offs, 0, -1):
2862632Sstever@eecs.umich.edu        if l[i] == elt:
2872632Sstever@eecs.umich.edu            return i
2882632Sstever@eecs.umich.edu    raise ValueError, "element not found"
2892632Sstever@eecs.umich.edu
2908268Ssteve.reinhardt@amd.com# Take a list of paths (or SCons Nodes) and return a list with all
2918268Ssteve.reinhardt@amd.com# paths made absolute and ~-expanded.  Paths will be interpreted
2928268Ssteve.reinhardt@amd.com# relative to the launch directory unless a different root is provided
2938268Ssteve.reinhardt@amd.comdef makePathListAbsolute(path_list, root=GetLaunchDir()):
2948268Ssteve.reinhardt@amd.com    return [abspath(joinpath(root, expanduser(str(p))))
2958268Ssteve.reinhardt@amd.com            for p in path_list]
2968268Ssteve.reinhardt@amd.com
2972632Sstever@eecs.umich.edu# Each target must have 'build' in the interior of the path; the
2982632Sstever@eecs.umich.edu# directory below this will determine the build parameters.  For
2992632Sstever@eecs.umich.edu# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
3002632Sstever@eecs.umich.edu# recognize that ALPHA_SE specifies the configuration because it
3018268Ssteve.reinhardt@amd.com# follow 'build' in the build path.
3022632Sstever@eecs.umich.edu
3038268Ssteve.reinhardt@amd.com# The funky assignment to "[:]" is needed to replace the list contents
3048268Ssteve.reinhardt@amd.com# in place rather than reassign the symbol to a new list, which
3058268Ssteve.reinhardt@amd.com# doesn't work (obviously!).
3068268Ssteve.reinhardt@amd.comBUILD_TARGETS[:] = makePathListAbsolute(BUILD_TARGETS)
3073718Sstever@eecs.umich.edu
3082634Sstever@eecs.umich.edu# Generate a list of the unique build roots and configs that the
3092634Sstever@eecs.umich.edu# collected targets reference.
3105863Snate@binkert.orgvariant_paths = []
3112638Sstever@eecs.umich.edubuild_root = None
3128268Ssteve.reinhardt@amd.comfor t in BUILD_TARGETS:
3132632Sstever@eecs.umich.edu    path_dirs = t.split('/')
3142632Sstever@eecs.umich.edu    try:
3152632Sstever@eecs.umich.edu        build_top = rfind(path_dirs, 'build', -2)
3162632Sstever@eecs.umich.edu    except:
3172632Sstever@eecs.umich.edu        print "Error: no non-leaf 'build' dir found on target path", t
3181858SN/A        Exit(1)
3193716Sstever@eecs.umich.edu    this_build_root = joinpath('/',*path_dirs[:build_top+1])
3202638Sstever@eecs.umich.edu    if not build_root:
3212638Sstever@eecs.umich.edu        build_root = this_build_root
3222638Sstever@eecs.umich.edu    else:
3232638Sstever@eecs.umich.edu        if this_build_root != build_root:
3242638Sstever@eecs.umich.edu            print "Error: build targets not under same build root\n"\
3252638Sstever@eecs.umich.edu                  "  %s\n  %s" % (build_root, this_build_root)
3262638Sstever@eecs.umich.edu            Exit(1)
3275863Snate@binkert.org    variant_path = joinpath('/',*path_dirs[:build_top+2])
3285863Snate@binkert.org    if variant_path not in variant_paths:
3295863Snate@binkert.org        variant_paths.append(variant_path)
330955SN/A
3315341Sstever@gmail.com# Make sure build_root exists (might not if this is the first build there)
3325341Sstever@gmail.comif not isdir(build_root):
3335863Snate@binkert.org    mkdir(build_root)
3347756SAli.Saidi@ARM.commain['BUILDROOT'] = build_root
3355341Sstever@gmail.com
3366121Snate@binkert.orgExport('main')
3374494Ssaidi@eecs.umich.edu
3386121Snate@binkert.orgmain.SConsignFile(joinpath(build_root, "sconsign"))
3391105SN/A
3402667Sstever@eecs.umich.edu# Default duplicate option is to use hard links, but this messes up
3412667Sstever@eecs.umich.edu# when you use emacs to edit a file in the target dir, as emacs moves
3422667Sstever@eecs.umich.edu# file to file~ then copies to file, breaking the link.  Symbolic
3432667Sstever@eecs.umich.edu# (soft) links work better.
3446121Snate@binkert.orgmain.SetOption('duplicate', 'soft-copy')
3452667Sstever@eecs.umich.edu
3465341Sstever@gmail.com#
3475863Snate@binkert.org# Set up global sticky variables... these are common to an entire build
3485341Sstever@gmail.com# tree (not specific to a particular build like ALPHA_SE)
3495341Sstever@gmail.com#
3505341Sstever@gmail.com
3518120Sgblack@eecs.umich.eduglobal_vars_file = joinpath(build_root, 'variables.global')
3525341Sstever@gmail.com
3538120Sgblack@eecs.umich.eduglobal_vars = Variables(global_vars_file, args=ARGUMENTS)
3545341Sstever@gmail.com
3558120Sgblack@eecs.umich.eduglobal_vars.AddVariables(
3566121Snate@binkert.org    ('CC', 'C compiler', environ.get('CC', main['CC'])),
3576121Snate@binkert.org    ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])),
3585397Ssaidi@eecs.umich.edu    ('BATCH', 'Use batch pool for build and tests', False),
3595397Ssaidi@eecs.umich.edu    ('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
3607727SAli.Saidi@ARM.com    ('M5_BUILD_CACHE', 'Cache built objects in this directory', False),
3618268Ssteve.reinhardt@amd.com    ('EXTRAS', 'Add extra directories to the compilation', '')
3626168Snate@binkert.org    )
3635341Sstever@gmail.com
3648120Sgblack@eecs.umich.edu# Update main environment with values from ARGUMENTS & global_vars_file
3658120Sgblack@eecs.umich.eduglobal_vars.Update(main)
3668120Sgblack@eecs.umich.eduhelp_texts["global_vars"] += global_vars.GenerateHelpText(main)
3676814Sgblack@eecs.umich.edu
3685863Snate@binkert.org# Save sticky variable settings back to current variables file
3698120Sgblack@eecs.umich.eduglobal_vars.Save(global_vars_file, main)
3705341Sstever@gmail.com
3715863Snate@binkert.org# Parse EXTRAS variable to build list of all directories where we're
3728268Ssteve.reinhardt@amd.com# look for sources etc.  This list is exported as extras_dir_list.
3736121Snate@binkert.orgbase_dir = main.srcdir.abspath
3746121Snate@binkert.orgif main['EXTRAS']:
3758268Ssteve.reinhardt@amd.com    extras_dir_list = makePathListAbsolute(main['EXTRAS'].split(':'))
3765742Snate@binkert.orgelse:
3775742Snate@binkert.org    extras_dir_list = []
3785341Sstever@gmail.com
3795742Snate@binkert.orgExport('base_dir')
3805742Snate@binkert.orgExport('extras_dir_list')
3815341Sstever@gmail.com
3826017Snate@binkert.org# the ext directory should be on the #includes path
3836121Snate@binkert.orgmain.Append(CPPPATH=[Dir('ext')])
3846017Snate@binkert.org
3857816Ssteve.reinhardt@amd.comdef strip_build_path(path, env):
3867756SAli.Saidi@ARM.com    path = str(path)
3877756SAli.Saidi@ARM.com    variant_base = env['BUILDROOT'] + os.path.sep
3887756SAli.Saidi@ARM.com    if path.startswith(variant_base):
3897756SAli.Saidi@ARM.com        path = path[len(variant_base):]
3907756SAli.Saidi@ARM.com    elif path.startswith('build/'):
3917756SAli.Saidi@ARM.com        path = path[6:]
3927756SAli.Saidi@ARM.com    return path
3937756SAli.Saidi@ARM.com
3947816Ssteve.reinhardt@amd.com# Generate a string of the form:
3957816Ssteve.reinhardt@amd.com#   common/path/prefix/src1, src2 -> tgt1, tgt2
3967816Ssteve.reinhardt@amd.com# to print while building.
3977816Ssteve.reinhardt@amd.comclass Transform(object):
3987816Ssteve.reinhardt@amd.com    # all specific color settings should be here and nowhere else
3997816Ssteve.reinhardt@amd.com    tool_color = termcap.Normal
4007816Ssteve.reinhardt@amd.com    pfx_color = termcap.Yellow
4017816Ssteve.reinhardt@amd.com    srcs_color = termcap.Yellow + termcap.Bold
4027816Ssteve.reinhardt@amd.com    arrow_color = termcap.Blue + termcap.Bold
4037816Ssteve.reinhardt@amd.com    tgts_color = termcap.Yellow + termcap.Bold
4047756SAli.Saidi@ARM.com
4057816Ssteve.reinhardt@amd.com    def __init__(self, tool, max_sources=99):
4067816Ssteve.reinhardt@amd.com        self.format = self.tool_color + (" [%8s] " % tool) \
4077816Ssteve.reinhardt@amd.com                      + self.pfx_color + "%s" \
4087816Ssteve.reinhardt@amd.com                      + self.srcs_color + "%s" \
4097816Ssteve.reinhardt@amd.com                      + self.arrow_color + " -> " \
4107816Ssteve.reinhardt@amd.com                      + self.tgts_color + "%s" \
4117816Ssteve.reinhardt@amd.com                      + termcap.Normal
4127816Ssteve.reinhardt@amd.com        self.max_sources = max_sources
4137816Ssteve.reinhardt@amd.com
4147816Ssteve.reinhardt@amd.com    def __call__(self, target, source, env, for_signature=None):
4157816Ssteve.reinhardt@amd.com        # truncate source list according to max_sources param
4167816Ssteve.reinhardt@amd.com        source = source[0:self.max_sources]
4177816Ssteve.reinhardt@amd.com        def strip(f):
4187816Ssteve.reinhardt@amd.com            return strip_build_path(str(f), env)
4197816Ssteve.reinhardt@amd.com        if len(source) > 0:
4207816Ssteve.reinhardt@amd.com            srcs = map(strip, source)
4217816Ssteve.reinhardt@amd.com        else:
4227816Ssteve.reinhardt@amd.com            srcs = ['']
4237816Ssteve.reinhardt@amd.com        tgts = map(strip, target)
4247816Ssteve.reinhardt@amd.com        # surprisingly, os.path.commonprefix is a dumb char-by-char string
4257816Ssteve.reinhardt@amd.com        # operation that has nothing to do with paths.
4267816Ssteve.reinhardt@amd.com        com_pfx = os.path.commonprefix(srcs + tgts)
4277816Ssteve.reinhardt@amd.com        com_pfx_len = len(com_pfx)
4287816Ssteve.reinhardt@amd.com        if com_pfx:
4297816Ssteve.reinhardt@amd.com            # do some cleanup and sanity checking on common prefix
4307816Ssteve.reinhardt@amd.com            if com_pfx[-1] == ".":
4317816Ssteve.reinhardt@amd.com                # prefix matches all but file extension: ok
4327816Ssteve.reinhardt@amd.com                # back up one to change 'foo.cc -> o' to 'foo.cc -> .o'
4337816Ssteve.reinhardt@amd.com                com_pfx = com_pfx[0:-1]
4347816Ssteve.reinhardt@amd.com            elif com_pfx[-1] == "/":
4357816Ssteve.reinhardt@amd.com                # common prefix is directory path: OK
4367816Ssteve.reinhardt@amd.com                pass
4377816Ssteve.reinhardt@amd.com            else:
4387816Ssteve.reinhardt@amd.com                src0_len = len(srcs[0])
4397816Ssteve.reinhardt@amd.com                tgt0_len = len(tgts[0])
4407816Ssteve.reinhardt@amd.com                if src0_len == com_pfx_len:
4417816Ssteve.reinhardt@amd.com                    # source is a substring of target, OK
4427816Ssteve.reinhardt@amd.com                    pass
4437816Ssteve.reinhardt@amd.com                elif tgt0_len == com_pfx_len:
4447816Ssteve.reinhardt@amd.com                    # target is a substring of source, need to back up to
4457816Ssteve.reinhardt@amd.com                    # avoid empty string on RHS of arrow
4467816Ssteve.reinhardt@amd.com                    sep_idx = com_pfx.rfind(".")
4477816Ssteve.reinhardt@amd.com                    if sep_idx != -1:
4487816Ssteve.reinhardt@amd.com                        com_pfx = com_pfx[0:sep_idx]
4497816Ssteve.reinhardt@amd.com                    else:
4507816Ssteve.reinhardt@amd.com                        com_pfx = ''
4517816Ssteve.reinhardt@amd.com                elif src0_len > com_pfx_len and srcs[0][com_pfx_len] == ".":
4527816Ssteve.reinhardt@amd.com                    # still splitting at file extension: ok
4537816Ssteve.reinhardt@amd.com                    pass
4547816Ssteve.reinhardt@amd.com                else:
4557816Ssteve.reinhardt@amd.com                    # probably a fluke; ignore it
4567816Ssteve.reinhardt@amd.com                    com_pfx = ''
4577816Ssteve.reinhardt@amd.com        # recalculate length in case com_pfx was modified
4587816Ssteve.reinhardt@amd.com        com_pfx_len = len(com_pfx)
4597816Ssteve.reinhardt@amd.com        def fmt(files):
4607816Ssteve.reinhardt@amd.com            f = map(lambda s: s[com_pfx_len:], files)
4617816Ssteve.reinhardt@amd.com            return ', '.join(f)
4627816Ssteve.reinhardt@amd.com        return self.format % (com_pfx, fmt(srcs), fmt(tgts))
4637816Ssteve.reinhardt@amd.com
4647816Ssteve.reinhardt@amd.comExport('Transform')
4657816Ssteve.reinhardt@amd.com
4667756SAli.Saidi@ARM.com
4678120Sgblack@eecs.umich.eduif GetOption('verbose'):
4687756SAli.Saidi@ARM.com    def MakeAction(action, string, *args, **kwargs):
4697756SAli.Saidi@ARM.com        return Action(action, *args, **kwargs)
4707756SAli.Saidi@ARM.comelse:
4717756SAli.Saidi@ARM.com    MakeAction = Action
4727816Ssteve.reinhardt@amd.com    main['CCCOMSTR']        = Transform("CC")
4737816Ssteve.reinhardt@amd.com    main['CXXCOMSTR']       = Transform("CXX")
4747816Ssteve.reinhardt@amd.com    main['ASCOMSTR']        = Transform("AS")
4757816Ssteve.reinhardt@amd.com    main['SWIGCOMSTR']      = Transform("SWIG")
4767816Ssteve.reinhardt@amd.com    main['ARCOMSTR']        = Transform("AR", 0)
4777816Ssteve.reinhardt@amd.com    main['LINKCOMSTR']      = Transform("LINK", 0)
4787816Ssteve.reinhardt@amd.com    main['RANLIBCOMSTR']    = Transform("RANLIB", 0)
4797816Ssteve.reinhardt@amd.com    main['M4COMSTR']        = Transform("M4")
4807816Ssteve.reinhardt@amd.com    main['SHCCCOMSTR']      = Transform("SHCC")
4817816Ssteve.reinhardt@amd.com    main['SHCXXCOMSTR']     = Transform("SHCXX")
4827756SAli.Saidi@ARM.comExport('MakeAction')
4837756SAli.Saidi@ARM.com
4846654Snate@binkert.orgCXX_version = readCommand([main['CXX'],'--version'], exception=False)
4856654Snate@binkert.orgCXX_V = readCommand([main['CXX'],'-V'], exception=False)
4865871Snate@binkert.org
4876121Snate@binkert.orgmain['GCC'] = CXX_version and CXX_version.find('g++') >= 0
4886121Snate@binkert.orgmain['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
4896121Snate@binkert.orgmain['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
4908737Skoansin.tan@gmail.commain['CLANG'] = CXX_V and CXX_V.find('clang') >= 0
4918737Skoansin.tan@gmail.comif main['GCC'] + main['SUNCC'] + main['ICC'] + main['CLANG'] > 1:
4923940Ssaidi@eecs.umich.edu    print 'Error: How can we have two at the same time?'
4933918Ssaidi@eecs.umich.edu    Exit(1)
4943918Ssaidi@eecs.umich.edu
4951858SN/A# Set up default C++ compiler flags
4966121Snate@binkert.orgif main['GCC']:
4977739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-pipe'])
4987739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-fno-strict-aliasing'])
4996143Snate@binkert.org    main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
5007739Sgblack@eecs.umich.edu    main.Append(CXXFLAGS=['-Wno-deprecated'])
5017618SAli.Saidi@arm.com    # Read the GCC version to check for versions with bugs
5027618SAli.Saidi@arm.com    # Note CCVERSION doesn't work here because it is run with the CC
5037618SAli.Saidi@arm.com    # before we override it from the command line
5047618SAli.Saidi@arm.com    gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
5058614Sgblack@eecs.umich.edu    main['GCC_VERSION'] = gcc_version
5067618SAli.Saidi@arm.com    if not compareVersions(gcc_version, '4.4.1') or \
5077618SAli.Saidi@arm.com       not compareVersions(gcc_version, '4.4.2'):
5087618SAli.Saidi@arm.com        print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
5097739Sgblack@eecs.umich.edu        main.Append(CCFLAGS=['-fno-tree-vectorize'])
5106121Snate@binkert.orgelif main['ICC']:
5113940Ssaidi@eecs.umich.edu    pass #Fix me... add warning flags once we clean up icc warnings
5126121Snate@binkert.orgelif main['SUNCC']:
5137739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-Qoption ccfe'])
5147739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-features=gcc'])
5157739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-features=extensions'])
5167739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-library=stlport4'])
5177739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=['-xar'])
5187739Sgblack@eecs.umich.edu    #main.Append(CCFLAGS=['-instances=semiexplicit'])
5198737Skoansin.tan@gmail.comelif main['CLANG']:
5208737Skoansin.tan@gmail.com    clang_version_re = re.compile(".* version (\d+\.\d+)")
5218737Skoansin.tan@gmail.com    clang_version_match = clang_version_re.match(CXX_version)
5228737Skoansin.tan@gmail.com    if (clang_version_match):
5238737Skoansin.tan@gmail.com        clang_version = clang_version_match.groups()[0]
5248737Skoansin.tan@gmail.com        if compareVersions(clang_version, "2.9") < 0:
5258737Skoansin.tan@gmail.com            print 'Error: clang version 2.9 or newer required.'
5268737Skoansin.tan@gmail.com            print '       Installed version:', clang_version
5278737Skoansin.tan@gmail.com            Exit(1)
5288737Skoansin.tan@gmail.com    else:
5298737Skoansin.tan@gmail.com        print 'Error: Unable to determine clang version.'
5308737Skoansin.tan@gmail.com        Exit(1)
5318737Skoansin.tan@gmail.com
5328737Skoansin.tan@gmail.com    main.Append(CCFLAGS=['-pipe'])
5338737Skoansin.tan@gmail.com    main.Append(CCFLAGS=['-fno-strict-aliasing'])
5348737Skoansin.tan@gmail.com    main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
5358737Skoansin.tan@gmail.com    main.Append(CCFLAGS=['-Wno-tautological-compare'])
5368737Skoansin.tan@gmail.com    main.Append(CCFLAGS=['-Wno-self-assign'])
5373918Ssaidi@eecs.umich.eduelse:
5383918Ssaidi@eecs.umich.edu    print 'Error: Don\'t know what compiler options to use for your compiler.'
5393940Ssaidi@eecs.umich.edu    print '       Please fix SConstruct and src/SConscript and try again.'
5403918Ssaidi@eecs.umich.edu    Exit(1)
5413918Ssaidi@eecs.umich.edu
5426157Snate@binkert.org# Set up common yacc/bison flags (needed for Ruby)
5436157Snate@binkert.orgmain['YACCFLAGS'] = '-d'
5446157Snate@binkert.orgmain['YACCHXXFILESUFFIX'] = '.hh'
5456157Snate@binkert.org
5465397Ssaidi@eecs.umich.edu# Do this after we save setting back, or else we'll tack on an
5475397Ssaidi@eecs.umich.edu# extra 'qdo' every time we run scons.
5486121Snate@binkert.orgif main['BATCH']:
5496121Snate@binkert.org    main['CC']     = main['BATCH_CMD'] + ' ' + main['CC']
5506121Snate@binkert.org    main['CXX']    = main['BATCH_CMD'] + ' ' + main['CXX']
5516121Snate@binkert.org    main['AS']     = main['BATCH_CMD'] + ' ' + main['AS']
5526121Snate@binkert.org    main['AR']     = main['BATCH_CMD'] + ' ' + main['AR']
5536121Snate@binkert.org    main['RANLIB'] = main['BATCH_CMD'] + ' ' + main['RANLIB']
5545397Ssaidi@eecs.umich.edu
5551851SN/Aif sys.platform == 'cygwin':
5561851SN/A    # cygwin has some header file issues...
5577739Sgblack@eecs.umich.edu    main.Append(CCFLAGS=["-Wno-uninitialized"])
558955SN/A
5593053Sstever@eecs.umich.edu# Check for SWIG
5606121Snate@binkert.orgif not main.has_key('SWIG'):
5613053Sstever@eecs.umich.edu    print 'Error: SWIG utility not found.'
5623053Sstever@eecs.umich.edu    print '       Please install (see http://www.swig.org) and retry.'
5633053Sstever@eecs.umich.edu    Exit(1)
5643053Sstever@eecs.umich.edu
5653053Sstever@eecs.umich.edu# Check for appropriate SWIG version
5666654Snate@binkert.orgswig_version = readCommand(('swig', '-version'), exception='').split()
5673053Sstever@eecs.umich.edu# First 3 words should be "SWIG Version x.y.z"
5684742Sstever@eecs.umich.eduif len(swig_version) < 3 or \
5694742Sstever@eecs.umich.edu        swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
5703053Sstever@eecs.umich.edu    print 'Error determining SWIG version.'
5713053Sstever@eecs.umich.edu    Exit(1)
5723053Sstever@eecs.umich.edu
5733053Sstever@eecs.umich.edumin_swig_version = '1.3.28'
5746654Snate@binkert.orgif compareVersions(swig_version[2], min_swig_version) < 0:
5753053Sstever@eecs.umich.edu    print 'Error: SWIG version', min_swig_version, 'or newer required.'
5763053Sstever@eecs.umich.edu    print '       Installed version:', swig_version[2]
5773053Sstever@eecs.umich.edu    Exit(1)
5783053Sstever@eecs.umich.edu
5792667Sstever@eecs.umich.edu# Set up SWIG flags & scanner
5804554Sbinkertn@umich.eduswig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
5816121Snate@binkert.orgmain.Append(SWIGFLAGS=swig_flags)
5822667Sstever@eecs.umich.edu
5834554Sbinkertn@umich.edu# filter out all existing swig scanners, they mess up the dependency
5844554Sbinkertn@umich.edu# stuff for some reason
5854554Sbinkertn@umich.eduscanners = []
5866121Snate@binkert.orgfor scanner in main['SCANNERS']:
5874554Sbinkertn@umich.edu    skeys = scanner.skeys
5884554Sbinkertn@umich.edu    if skeys == '.i':
5894554Sbinkertn@umich.edu        continue
5904781Snate@binkert.org
5914554Sbinkertn@umich.edu    if isinstance(skeys, (list, tuple)) and '.i' in skeys:
5924554Sbinkertn@umich.edu        continue
5932667Sstever@eecs.umich.edu
5944554Sbinkertn@umich.edu    scanners.append(scanner)
5954554Sbinkertn@umich.edu
5964554Sbinkertn@umich.edu# add the new swig scanner that we like better
5974554Sbinkertn@umich.edufrom SCons.Scanner import ClassicCPP as CPPScanner
5982667Sstever@eecs.umich.eduswig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
5994554Sbinkertn@umich.eduscanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
6002667Sstever@eecs.umich.edu
6014554Sbinkertn@umich.edu# replace the scanners list that has what we want
6026121Snate@binkert.orgmain['SCANNERS'] = scanners
6032667Sstever@eecs.umich.edu
6045522Snate@binkert.org# Add a custom Check function to the Configure context so that we can
6055522Snate@binkert.org# figure out if the compiler adds leading underscores to global
6065522Snate@binkert.org# variables.  This is needed for the autogenerated asm files that we
6075522Snate@binkert.org# use for embedding the python code.
6085522Snate@binkert.orgdef CheckLeading(context):
6095522Snate@binkert.org    context.Message("Checking for leading underscore in global variables...")
6105522Snate@binkert.org    # 1) Define a global variable called x from asm so the C compiler
6115522Snate@binkert.org    #    won't change the symbol at all.
6125522Snate@binkert.org    # 2) Declare that variable.
6135522Snate@binkert.org    # 3) Use the variable
6145522Snate@binkert.org    #
6155522Snate@binkert.org    # If the compiler prepends an underscore, this will successfully
6165522Snate@binkert.org    # link because the external symbol 'x' will be called '_x' which
6175522Snate@binkert.org    # was defined by the asm statement.  If the compiler does not
6185522Snate@binkert.org    # prepend an underscore, this will not successfully link because
6195522Snate@binkert.org    # '_x' will have been defined by assembly, while the C portion of
6205522Snate@binkert.org    # the code will be trying to use 'x'
6215522Snate@binkert.org    ret = context.TryLink('''
6225522Snate@binkert.org        asm(".globl _x; _x: .byte 0");
6235522Snate@binkert.org        extern int x;
6245522Snate@binkert.org        int main() { return x; }
6255522Snate@binkert.org        ''', extension=".c")
6265522Snate@binkert.org    context.env.Append(LEADING_UNDERSCORE=ret)
6275522Snate@binkert.org    context.Result(ret)
6285522Snate@binkert.org    return ret
6295522Snate@binkert.org
6302638Sstever@eecs.umich.edu# Platform-specific configuration.  Note again that we assume that all
6312638Sstever@eecs.umich.edu# builds under a given build root run on the same host platform.
6326121Snate@binkert.orgconf = Configure(main,
6333716Sstever@eecs.umich.edu                 conf_dir = joinpath(build_root, '.scons_config'),
6345522Snate@binkert.org                 log_file = joinpath(build_root, 'scons_config.log'),
6355522Snate@binkert.org                 custom_tests = { 'CheckLeading' : CheckLeading })
6365522Snate@binkert.org
6375522Snate@binkert.org# Check for leading underscores.  Don't really need to worry either
6385522Snate@binkert.org# way so don't need to check the return code.
6395522Snate@binkert.orgconf.CheckLeading()
6401858SN/A
6415227Ssaidi@eecs.umich.edu# Check if we should compile a 64 bit binary on Mac OS X/Darwin
6425227Ssaidi@eecs.umich.edutry:
6435227Ssaidi@eecs.umich.edu    import platform
6445227Ssaidi@eecs.umich.edu    uname = platform.uname()
6456654Snate@binkert.org    if uname[0] == 'Darwin' and compareVersions(uname[2], '9.0.0') >= 0:
6466654Snate@binkert.org        if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]):
6477769SAli.Saidi@ARM.com            main.Append(CCFLAGS=['-arch', 'x86_64'])
6487769SAli.Saidi@ARM.com            main.Append(CFLAGS=['-arch', 'x86_64'])
6497769SAli.Saidi@ARM.com            main.Append(LINKFLAGS=['-arch', 'x86_64'])
6507769SAli.Saidi@ARM.com            main.Append(ASFLAGS=['-arch', 'x86_64'])
6515227Ssaidi@eecs.umich.eduexcept:
6525227Ssaidi@eecs.umich.edu    pass
6535227Ssaidi@eecs.umich.edu
6545204Sstever@gmail.com# Recent versions of scons substitute a "Null" object for Configure()
6555204Sstever@gmail.com# when configuration isn't necessary, e.g., if the "--help" option is
6565204Sstever@gmail.com# present.  Unfortuantely this Null object always returns false,
6575204Sstever@gmail.com# breaking all our configuration checks.  We replace it with our own
6585204Sstever@gmail.com# more optimistic null object that returns True instead.
6595204Sstever@gmail.comif not conf:
6605204Sstever@gmail.com    def NullCheck(*args, **kwargs):
6615204Sstever@gmail.com        return True
6625204Sstever@gmail.com
6635204Sstever@gmail.com    class NullConf:
6645204Sstever@gmail.com        def __init__(self, env):
6655204Sstever@gmail.com            self.env = env
6665204Sstever@gmail.com        def Finish(self):
6675204Sstever@gmail.com            return self.env
6685204Sstever@gmail.com        def __getattr__(self, mname):
6695204Sstever@gmail.com            return NullCheck
6705204Sstever@gmail.com
6716121Snate@binkert.org    conf = NullConf(main)
6725204Sstever@gmail.com
6733118Sstever@eecs.umich.edu# Find Python include and library directories for embedding the
6743118Sstever@eecs.umich.edu# interpreter.  For consistency, we will use the same Python
6753118Sstever@eecs.umich.edu# installation used to run scons (and thus this script).  If you want
6763118Sstever@eecs.umich.edu# to link in an alternate version, see above for instructions on how
6773118Sstever@eecs.umich.edu# to invoke scons with a different copy of the Python interpreter.
6785863Snate@binkert.orgfrom distutils import sysconfig
6793118Sstever@eecs.umich.edu
6805863Snate@binkert.orgpy_getvar = sysconfig.get_config_var
6813118Sstever@eecs.umich.edu
6827457Snate@binkert.orgpy_debug = getattr(sys, 'pydebug', False)
6837457Snate@binkert.orgpy_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
6845863Snate@binkert.org
6855863Snate@binkert.orgpy_general_include = sysconfig.get_python_inc()
6865863Snate@binkert.orgpy_platform_include = sysconfig.get_python_inc(plat_specific=True)
6875863Snate@binkert.orgpy_includes = [ py_general_include ]
6885863Snate@binkert.orgif py_platform_include != py_general_include:
6895863Snate@binkert.org    py_includes.append(py_platform_include)
6905863Snate@binkert.org
6916003Snate@binkert.orgpy_lib_path = [ py_getvar('LIBDIR') ]
6925863Snate@binkert.org# add the prefix/lib/pythonX.Y/config dir, but only if there is no
6935863Snate@binkert.org# shared library in prefix/lib/.
6945863Snate@binkert.orgif not py_getvar('Py_ENABLE_SHARED'):
6956120Snate@binkert.org    py_lib_path.append(py_getvar('LIBPL'))
6965863Snate@binkert.org
6975863Snate@binkert.orgpy_libs = []
6985863Snate@binkert.orgfor lib in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split():
6998655Sandreas.hansson@arm.com    if not lib.startswith('-l'):
7008655Sandreas.hansson@arm.com        # Python requires some special flags to link (e.g. -framework
7018655Sandreas.hansson@arm.com        # common on OS X systems), assume appending preserves order
7028655Sandreas.hansson@arm.com        main.Append(LINKFLAGS=[lib])
7038655Sandreas.hansson@arm.com    else:
7048655Sandreas.hansson@arm.com        lib = lib[2:]
7058655Sandreas.hansson@arm.com        if lib not in py_libs:
7068655Sandreas.hansson@arm.com            py_libs.append(lib)
7076120Snate@binkert.orgpy_libs.append(py_version)
7085863Snate@binkert.org
7096121Snate@binkert.orgmain.Append(CPPPATH=py_includes)
7106121Snate@binkert.orgmain.Append(LIBPATH=py_lib_path)
7115863Snate@binkert.org
7127727SAli.Saidi@ARM.com# Cache build files in the supplied directory.
7137727SAli.Saidi@ARM.comif main['M5_BUILD_CACHE']:
7147727SAli.Saidi@ARM.com    print 'Using build cache located at', main['M5_BUILD_CACHE']
7157727SAli.Saidi@ARM.com    CacheDir(main['M5_BUILD_CACHE'])
7167727SAli.Saidi@ARM.com
7177727SAli.Saidi@ARM.com
7185863Snate@binkert.org# verify that this stuff works
7193118Sstever@eecs.umich.eduif not conf.CheckHeader('Python.h', '<>'):
7205863Snate@binkert.org    print "Error: can't find Python.h header in", py_includes
7213118Sstever@eecs.umich.edu    Exit(1)
7223118Sstever@eecs.umich.edu
7235863Snate@binkert.orgfor lib in py_libs:
7245863Snate@binkert.org    if not conf.CheckLib(lib):
7255863Snate@binkert.org        print "Error: can't find library %s required by python" % lib
7265863Snate@binkert.org        Exit(1)
7273118Sstever@eecs.umich.edu
7283483Ssaidi@eecs.umich.edu# On Solaris you need to use libsocket for socket ops
7293494Ssaidi@eecs.umich.eduif not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
7303494Ssaidi@eecs.umich.edu   if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
7313483Ssaidi@eecs.umich.edu       print "Can't find library with socket calls (e.g. accept())"
7323483Ssaidi@eecs.umich.edu       Exit(1)
7333483Ssaidi@eecs.umich.edu
7343053Sstever@eecs.umich.edu# Check for zlib.  If the check passes, libz will be automatically
7353053Sstever@eecs.umich.edu# added to the LIBS environment variable.
7363918Ssaidi@eecs.umich.eduif not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'):
7373053Sstever@eecs.umich.edu    print 'Error: did not find needed zlib compression library '\
7383053Sstever@eecs.umich.edu          'and/or zlib.h header file.'
7393053Sstever@eecs.umich.edu    print '       Please install zlib and try again.'
7403053Sstever@eecs.umich.edu    Exit(1)
7413053Sstever@eecs.umich.edu
7427840Snate@binkert.org# Check for librt.
7437865Sgblack@eecs.umich.eduhave_posix_clock = \
7447865Sgblack@eecs.umich.edu    conf.CheckLibWithHeader(None, 'time.h', 'C',
7457865Sgblack@eecs.umich.edu                            'clock_nanosleep(0,0,NULL,NULL);') or \
7467865Sgblack@eecs.umich.edu    conf.CheckLibWithHeader('rt', 'time.h', 'C',
7477865Sgblack@eecs.umich.edu                            'clock_nanosleep(0,0,NULL,NULL);')
7487840Snate@binkert.org
7497840Snate@binkert.orgif not have_posix_clock:
7507840Snate@binkert.org    print "Can't find library for POSIX clocks."
7517840Snate@binkert.org
7521858SN/A# Check for <fenv.h> (C99 FP environment control)
7531858SN/Ahave_fenv = conf.CheckHeader('fenv.h', '<>')
7541858SN/Aif not have_fenv:
7551858SN/A    print "Warning: Header file <fenv.h> not found."
7561858SN/A    print "         This host has no IEEE FP rounding mode control."
7571858SN/A
7585863Snate@binkert.org######################################################################
7595863Snate@binkert.org#
7605863Snate@binkert.org# Finish the configuration
7615863Snate@binkert.org#
7626121Snate@binkert.orgmain = conf.Finish()
7631858SN/A
7645863Snate@binkert.org######################################################################
7655863Snate@binkert.org#
7665863Snate@binkert.org# Collect all non-global variables
7675863Snate@binkert.org#
7685863Snate@binkert.org
7692139SN/A# Define the universe of supported ISAs
7704202Sbinkertn@umich.eduall_isa_list = [ ]
7714202Sbinkertn@umich.eduExport('all_isa_list')
7722139SN/A
7736994Snate@binkert.orgclass CpuModel(object):
7746994Snate@binkert.org    '''The CpuModel class encapsulates everything the ISA parser needs to
7756994Snate@binkert.org    know about a particular CPU model.'''
7766994Snate@binkert.org
7776994Snate@binkert.org    # Dict of available CPU model objects.  Accessible as CpuModel.dict.
7786994Snate@binkert.org    dict = {}
7796994Snate@binkert.org    list = []
7806994Snate@binkert.org    defaults = []
7816994Snate@binkert.org
7826994Snate@binkert.org    # Constructor.  Automatically adds models to CpuModel.dict.
7836994Snate@binkert.org    def __init__(self, name, filename, includes, strings, default=False):
7846994Snate@binkert.org        self.name = name           # name of model
7856994Snate@binkert.org        self.filename = filename   # filename for output exec code
7866994Snate@binkert.org        self.includes = includes   # include files needed in exec file
7876994Snate@binkert.org        # The 'strings' dict holds all the per-CPU symbols we can
7886994Snate@binkert.org        # substitute into templates etc.
7896994Snate@binkert.org        self.strings = strings
7906994Snate@binkert.org
7916994Snate@binkert.org        # This cpu is enabled by default
7926994Snate@binkert.org        self.default = default
7936994Snate@binkert.org
7946994Snate@binkert.org        # Add self to dict
7956994Snate@binkert.org        if name in CpuModel.dict:
7966994Snate@binkert.org            raise AttributeError, "CpuModel '%s' already registered" % name
7976994Snate@binkert.org        CpuModel.dict[name] = self
7986994Snate@binkert.org        CpuModel.list.append(name)
7996994Snate@binkert.org
8006994Snate@binkert.orgExport('CpuModel')
8012155SN/A
8025863Snate@binkert.org# Sticky variables get saved in the variables file so they persist from
8031869SN/A# one invocation to the next (unless overridden, in which case the new
8041869SN/A# value becomes sticky).
8055863Snate@binkert.orgsticky_vars = Variables(args=ARGUMENTS)
8065863Snate@binkert.orgExport('sticky_vars')
8074202Sbinkertn@umich.edu
8086108Snate@binkert.org# Sticky variables that should be exported
8096108Snate@binkert.orgexport_vars = []
8106108Snate@binkert.orgExport('export_vars')
8116108Snate@binkert.org
8124202Sbinkertn@umich.edu# Walk the tree and execute all SConsopts scripts that wil add to the
8135863Snate@binkert.org# above variables
8148474Sgblack@eecs.umich.eduif not GetOption('verbose'):
8158474Sgblack@eecs.umich.edu    print "Reading SConsopts"
8165742Snate@binkert.orgfor bdir in [ base_dir ] + extras_dir_list:
8178268Ssteve.reinhardt@amd.com    if not isdir(bdir):
8188268Ssteve.reinhardt@amd.com        print "Error: directory '%s' does not exist" % bdir
8198268Ssteve.reinhardt@amd.com        Exit(1)
8205742Snate@binkert.org    for root, dirs, files in os.walk(bdir):
8215341Sstever@gmail.com        if 'SConsopts' in files:
8228474Sgblack@eecs.umich.edu            if GetOption('verbose'):
8238474Sgblack@eecs.umich.edu                print "Reading", joinpath(root, 'SConsopts')
8245342Sstever@gmail.com            SConscript(joinpath(root, 'SConsopts'))
8254202Sbinkertn@umich.edu
8264202Sbinkertn@umich.eduall_isa_list.sort()
8274202Sbinkertn@umich.edu
8285863Snate@binkert.orgsticky_vars.AddVariables(
8295863Snate@binkert.org    EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list),
8306994Snate@binkert.org    ListVariable('CPU_MODELS', 'CPU models',
8316994Snate@binkert.org                 sorted(n for n,m in CpuModel.dict.iteritems() if m.default),
8326994Snate@binkert.org                 sorted(CpuModel.list)),
8335863Snate@binkert.org    BoolVariable('NO_FAST_ALLOC', 'Disable fast object allocator', False),
8348152Ssteve.reinhardt@amd.com    BoolVariable('FORCE_FAST_ALLOC',
8358878Ssteve.reinhardt@amd.com                 'Enable fast object allocator, even for gem5.debug', False),
8365863Snate@binkert.org    BoolVariable('FAST_ALLOC_STATS', 'Enable fast object allocator statistics',
8375863Snate@binkert.org                 False),
8385863Snate@binkert.org    BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger',
8395863Snate@binkert.org                 False),
8405863Snate@binkert.org    BoolVariable('SS_COMPATIBLE_FP',
8415863Snate@binkert.org                 'Make floating-point results compatible with SimpleScalar',
8425863Snate@binkert.org                 False),
8435863Snate@binkert.org    BoolVariable('USE_SSE2',
8445863Snate@binkert.org                 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
8455863Snate@binkert.org                 False),
8467840Snate@binkert.org    BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock),
8475863Snate@binkert.org    BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
8485952Ssaidi@eecs.umich.edu    BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False),
8491869SN/A    )
8501858SN/A
8515863Snate@binkert.org# These variables get exported to #defines in config/*.hh (see src/SConscript).
8528805Sgblack@eecs.umich.eduexport_vars += ['USE_FENV', 'NO_FAST_ALLOC', 'FORCE_FAST_ALLOC',
8538887Sgeoffrey.blake@arm.com                'FAST_ALLOC_STATS', 'SS_COMPATIBLE_FP',
8548805Sgblack@eecs.umich.edu                'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
8551858SN/A
856955SN/A###################################################
857955SN/A#
8581869SN/A# Define a SCons builder for configuration flag headers.
8591869SN/A#
8601869SN/A###################################################
8611869SN/A
8621869SN/A# This function generates a config header file that #defines the
8635863Snate@binkert.org# variable symbol to the current variable setting (0 or 1).  The source
8645863Snate@binkert.org# operands are the name of the variable and a Value node containing the
8655863Snate@binkert.org# value of the variable.
8661869SN/Adef build_config_file(target, source, env):
8675863Snate@binkert.org    (variable, value) = [s.get_contents() for s in source]
8681869SN/A    f = file(str(target[0]), 'w')
8695863Snate@binkert.org    print >> f, '#define', variable, value
8701869SN/A    f.close()
8711869SN/A    return None
8721869SN/A
8731869SN/A# Combine the two functions into a scons Action object.
8748483Sgblack@eecs.umich.educonfig_action = MakeAction(build_config_file, Transform("CONFIG H", 2))
8751869SN/A
8761869SN/A# The emitter munges the source & target node lists to reflect what
8771869SN/A# we're really doing.
8781869SN/Adef config_emitter(target, source, env):
8795863Snate@binkert.org    # extract variable name from Builder arg
8805863Snate@binkert.org    variable = str(target[0])
8811869SN/A    # True target is config header file
8825863Snate@binkert.org    target = joinpath('config', variable.lower() + '.hh')
8835863Snate@binkert.org    val = env[variable]
8843356Sbinkertn@umich.edu    if isinstance(val, bool):
8853356Sbinkertn@umich.edu        # Force value to 0/1
8863356Sbinkertn@umich.edu        val = int(val)
8873356Sbinkertn@umich.edu    elif isinstance(val, str):
8883356Sbinkertn@umich.edu        val = '"' + val + '"'
8894781Snate@binkert.org
8905863Snate@binkert.org    # Sources are variable name & value (packaged in SCons Value nodes)
8915863Snate@binkert.org    return ([target], [Value(variable), Value(val)])
8921869SN/A
8931869SN/Aconfig_builder = Builder(emitter = config_emitter, action = config_action)
8941869SN/A
8956121Snate@binkert.orgmain.Append(BUILDERS = { 'ConfigFile' : config_builder })
8961869SN/A
8972638Sstever@eecs.umich.edu# libelf build is shared across all configs in the build root.
8986121Snate@binkert.orgmain.SConscript('ext/libelf/SConscript',
8996121Snate@binkert.org                variant_dir = joinpath(build_root, 'libelf'))
9002638Sstever@eecs.umich.edu
9015749Scws3k@cs.virginia.edu# gzstream build is shared across all configs in the build root.
9026121Snate@binkert.orgmain.SConscript('ext/gzstream/SConscript',
9036121Snate@binkert.org                variant_dir = joinpath(build_root, 'gzstream'))
9045749Scws3k@cs.virginia.edu
9051869SN/A###################################################
9061869SN/A#
9073546Sgblack@eecs.umich.edu# This function is used to set up a directory with switching headers
9083546Sgblack@eecs.umich.edu#
9093546Sgblack@eecs.umich.edu###################################################
9103546Sgblack@eecs.umich.edu
9116121Snate@binkert.orgmain['ALL_ISA_LIST'] = all_isa_list
9125863Snate@binkert.orgdef make_switching_dir(dname, switch_headers, env):
9133546Sgblack@eecs.umich.edu    # Generate the header.  target[0] is the full path of the output
9143546Sgblack@eecs.umich.edu    # header to generate.  'source' is a dummy variable, since we get the
9153546Sgblack@eecs.umich.edu    # list of ISAs from env['ALL_ISA_LIST'].
9163546Sgblack@eecs.umich.edu    def gen_switch_hdr(target, source, env):
9174781Snate@binkert.org        fname = str(target[0])
9184781Snate@binkert.org        f = open(fname, 'w')
9196658Snate@binkert.org        isa = env['TARGET_ISA'].lower()
9206658Snate@binkert.org        print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
9214781Snate@binkert.org        f.close()
9223546Sgblack@eecs.umich.edu
9233546Sgblack@eecs.umich.edu    # Build SCons Action object. 'varlist' specifies env vars that this
9243546Sgblack@eecs.umich.edu    # action depends on; when env['ALL_ISA_LIST'] changes these actions
9253546Sgblack@eecs.umich.edu    # should get re-executed.
9267756SAli.Saidi@ARM.com    switch_hdr_action = MakeAction(gen_switch_hdr,
9277816Ssteve.reinhardt@amd.com                          Transform("GENERATE"), varlist=['ALL_ISA_LIST'])
9283546Sgblack@eecs.umich.edu
9293546Sgblack@eecs.umich.edu    # Instantiate actions for each header
9303546Sgblack@eecs.umich.edu    for hdr in switch_headers:
9313546Sgblack@eecs.umich.edu        env.Command(hdr, [], switch_hdr_action)
9324202Sbinkertn@umich.eduExport('make_switching_dir')
9333546Sgblack@eecs.umich.edu
9343546Sgblack@eecs.umich.edu###################################################
9353546Sgblack@eecs.umich.edu#
936955SN/A# Define build environments for selected configurations.
937955SN/A#
938955SN/A###################################################
939955SN/A
9405863Snate@binkert.orgfor variant_path in variant_paths:
9415863Snate@binkert.org    print "Building in", variant_path
9425343Sstever@gmail.com
9435343Sstever@gmail.com    # Make a copy of the build-root environment to use for this config.
9446121Snate@binkert.org    env = main.Clone()
9455863Snate@binkert.org    env['BUILDDIR'] = variant_path
9464773Snate@binkert.org
9475863Snate@binkert.org    # variant_dir is the tail component of build path, and is used to
9482632Sstever@eecs.umich.edu    # determine the build parameters (e.g., 'ALPHA_SE')
9495863Snate@binkert.org    (build_root, variant_dir) = splitpath(variant_path)
9502023SN/A
9515863Snate@binkert.org    # Set env variables according to the build directory config.
9525863Snate@binkert.org    sticky_vars.files = []
9535863Snate@binkert.org    # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in
9545863Snate@binkert.org    # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke
9555863Snate@binkert.org    # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings.
9565863Snate@binkert.org    current_vars_file = joinpath(build_root, 'variables', variant_dir)
9575863Snate@binkert.org    if isfile(current_vars_file):
9585863Snate@binkert.org        sticky_vars.files.append(current_vars_file)
9595863Snate@binkert.org        print "Using saved variables file %s" % current_vars_file
9602632Sstever@eecs.umich.edu    else:
9615863Snate@binkert.org        # Build dir-specific variables file doesn't exist.
9622023SN/A
9632632Sstever@eecs.umich.edu        # Make sure the directory is there so we can create it later
9645863Snate@binkert.org        opt_dir = dirname(current_vars_file)
9655342Sstever@gmail.com        if not isdir(opt_dir):
9665863Snate@binkert.org            mkdir(opt_dir)
9672632Sstever@eecs.umich.edu
9685863Snate@binkert.org        # Get default build variables from source tree.  Variables are
9695863Snate@binkert.org        # normally determined by name of $VARIANT_DIR, but can be
9708267Ssteve.reinhardt@amd.com        # overridden by '--default=' arg on command line.
9718120Sgblack@eecs.umich.edu        default = GetOption('default')
9728267Ssteve.reinhardt@amd.com        opts_dir = joinpath(main.root.abspath, 'build_opts')
9738267Ssteve.reinhardt@amd.com        if default:
9748267Ssteve.reinhardt@amd.com            default_vars_files = [joinpath(build_root, 'variables', default),
9758267Ssteve.reinhardt@amd.com                                  joinpath(opts_dir, default)]
9768267Ssteve.reinhardt@amd.com        else:
9778267Ssteve.reinhardt@amd.com            default_vars_files = [joinpath(opts_dir, variant_dir)]
9788267Ssteve.reinhardt@amd.com        existing_files = filter(isfile, default_vars_files)
9798267Ssteve.reinhardt@amd.com        if existing_files:
9808267Ssteve.reinhardt@amd.com            default_vars_file = existing_files[0]
9815863Snate@binkert.org            sticky_vars.files.append(default_vars_file)
9825863Snate@binkert.org            print "Variables file %s not found,\n  using defaults in %s" \
9835863Snate@binkert.org                  % (current_vars_file, default_vars_file)
9842632Sstever@eecs.umich.edu        else:
9858267Ssteve.reinhardt@amd.com            print "Error: cannot find variables file %s or " \
9868267Ssteve.reinhardt@amd.com                  "default file(s) %s" \
9878267Ssteve.reinhardt@amd.com                  % (current_vars_file, ' or '.join(default_vars_files))
9882632Sstever@eecs.umich.edu            Exit(1)
9891888SN/A
9905863Snate@binkert.org    # Apply current variable settings to env
9915863Snate@binkert.org    sticky_vars.Update(env)
9921858SN/A
9938120Sgblack@eecs.umich.edu    help_texts["local_vars"] += \
9948120Sgblack@eecs.umich.edu        "Build variables for %s:\n" % variant_dir \
9957756SAli.Saidi@ARM.com                 + sticky_vars.GenerateHelpText(env)
9962598SN/A
9975863Snate@binkert.org    # Process variable settings.
9981858SN/A
9991858SN/A    if not have_fenv and env['USE_FENV']:
10001858SN/A        print "Warning: <fenv.h> not available; " \
10015863Snate@binkert.org              "forcing USE_FENV to False in", variant_dir + "."
10021858SN/A        env['USE_FENV'] = False
10031858SN/A
10041858SN/A    if not env['USE_FENV']:
10055863Snate@binkert.org        print "Warning: No IEEE FP rounding mode control in", variant_dir + "."
10061871SN/A        print "         FP results may deviate slightly from other platforms."
10071858SN/A
10081858SN/A    if env['EFENCE']:
10091858SN/A        env.Append(LIBS=['efence'])
10101858SN/A
10115863Snate@binkert.org    # Save sticky variable settings back to current variables file
10125863Snate@binkert.org    sticky_vars.Save(current_vars_file, env)
10131869SN/A
10141965SN/A    if env['USE_SSE2']:
10157739Sgblack@eecs.umich.edu        env.Append(CCFLAGS=['-msse2'])
10161965SN/A
10172761Sstever@eecs.umich.edu    # The src/SConscript file sets up the build rules in 'env' according
10185863Snate@binkert.org    # to the configured variables.  It returns a list of environments,
10191869SN/A    # one for each variant build (debug, opt, etc.)
10205863Snate@binkert.org    envList = SConscript('src/SConscript', variant_dir = variant_path,
10212667Sstever@eecs.umich.edu                         exports = 'env')
10221869SN/A
10231869SN/A    # Set up the regression tests for each build.
10242929Sktlim@umich.edu    for e in envList:
10252929Sktlim@umich.edu        SConscript('tests/SConscript',
10265863Snate@binkert.org                   variant_dir = joinpath(variant_path, 'tests', e.Label),
10272929Sktlim@umich.edu                   exports = { 'env' : e }, duplicate = False)
1028955SN/A
10298120Sgblack@eecs.umich.edu# base help text
10308120Sgblack@eecs.umich.eduHelp('''
10318120Sgblack@eecs.umich.eduUsage: scons [scons options] [build variables] [target(s)]
10328120Sgblack@eecs.umich.edu
10338120Sgblack@eecs.umich.eduExtra scons options:
10348120Sgblack@eecs.umich.edu%(options)s
10358120Sgblack@eecs.umich.edu
10368120Sgblack@eecs.umich.eduGlobal build variables:
10378120Sgblack@eecs.umich.edu%(global_vars)s
10388120Sgblack@eecs.umich.edu
10398120Sgblack@eecs.umich.edu%(local_vars)s
10408120Sgblack@eecs.umich.edu''' % help_texts)
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