SConstruct revision 9846:a4b5fd8937c9
1# -*- mode:python -*- 2 3# Copyright (c) 2013 ARM Limited 4# All rights reserved. 5# 6# The license below extends only to copyright in the software and shall 7# not be construed as granting a license to any other intellectual 8# property including but not limited to intellectual property relating 9# to a hardware implementation of the functionality of the software 10# licensed hereunder. You may use the software subject to the license 11# terms below provided that you ensure that this notice is replicated 12# unmodified and in its entirety in all distributions of the software, 13# modified or unmodified, in source code or in binary form. 14# 15# Copyright (c) 2011 Advanced Micro Devices, Inc. 16# Copyright (c) 2009 The Hewlett-Packard Development Company 17# Copyright (c) 2004-2005 The Regents of The University of Michigan 18# All rights reserved. 19# 20# Redistribution and use in source and binary forms, with or without 21# modification, are permitted provided that the following conditions are 22# met: redistributions of source code must retain the above copyright 23# notice, this list of conditions and the following disclaimer; 24# redistributions in binary form must reproduce the above copyright 25# notice, this list of conditions and the following disclaimer in the 26# documentation and/or other materials provided with the distribution; 27# neither the name of the copyright holders nor the names of its 28# contributors may be used to endorse or promote products derived from 29# this software without specific prior written permission. 30# 31# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 34# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 36# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 37# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 38# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 39# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 40# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 41# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42# 43# Authors: Steve Reinhardt 44# Nathan Binkert 45 46################################################### 47# 48# SCons top-level build description (SConstruct) file. 49# 50# While in this directory ('gem5'), just type 'scons' to build the default 51# configuration (see below), or type 'scons build/<CONFIG>/<binary>' 52# to build some other configuration (e.g., 'build/ALPHA/gem5.opt' for 53# the optimized full-system version). 54# 55# You can build gem5 in a different directory as long as there is a 56# 'build/<CONFIG>' somewhere along the target path. The build system 57# expects that all configs under the same build directory are being 58# built for the same host system. 59# 60# Examples: 61# 62# The following two commands are equivalent. The '-u' option tells 63# scons to search up the directory tree for this SConstruct file. 64# % cd <path-to-src>/gem5 ; scons build/ALPHA/gem5.debug 65# % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.debug 66# 67# The following two commands are equivalent and demonstrate building 68# in a directory outside of the source tree. The '-C' option tells 69# scons to chdir to the specified directory to find this SConstruct 70# file. 71# % cd <path-to-src>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug 72# % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug 73# 74# You can use 'scons -H' to print scons options. If you're in this 75# 'gem5' directory (or use -u or -C to tell scons where to find this 76# file), you can use 'scons -h' to print all the gem5-specific build 77# options as well. 78# 79################################################### 80 81# Check for recent-enough Python and SCons versions. 82try: 83 # Really old versions of scons only take two options for the 84 # function, so check once without the revision and once with the 85 # revision, the first instance will fail for stuff other than 86 # 0.98, and the second will fail for 0.98.0 87 EnsureSConsVersion(0, 98) 88 EnsureSConsVersion(0, 98, 1) 89except SystemExit, e: 90 print """ 91For more details, see: 92 http://gem5.org/Dependencies 93""" 94 raise 95 96# We ensure the python version early because because python-config 97# requires python 2.5 98try: 99 EnsurePythonVersion(2, 5) 100except SystemExit, e: 101 print """ 102You can use a non-default installation of the Python interpreter by 103rearranging your PATH so that scons finds the non-default 'python' and 104'python-config' first. 105 106For more details, see: 107 http://gem5.org/wiki/index.php/Using_a_non-default_Python_installation 108""" 109 raise 110 111# Global Python includes 112import os 113import re 114import subprocess 115import sys 116 117from os import mkdir, environ 118from os.path import abspath, basename, dirname, expanduser, normpath 119from os.path import exists, isdir, isfile 120from os.path import join as joinpath, split as splitpath 121 122# SCons includes 123import SCons 124import SCons.Node 125 126extra_python_paths = [ 127 Dir('src/python').srcnode().abspath, # gem5 includes 128 Dir('ext/ply').srcnode().abspath, # ply is used by several files 129 ] 130 131sys.path[1:1] = extra_python_paths 132 133from m5.util import compareVersions, readCommand 134from m5.util.terminal import get_termcap 135 136help_texts = { 137 "options" : "", 138 "global_vars" : "", 139 "local_vars" : "" 140} 141 142Export("help_texts") 143 144 145# There's a bug in scons in that (1) by default, the help texts from 146# AddOption() are supposed to be displayed when you type 'scons -h' 147# and (2) you can override the help displayed by 'scons -h' using the 148# Help() function, but these two features are incompatible: once 149# you've overridden the help text using Help(), there's no way to get 150# at the help texts from AddOptions. See: 151# http://scons.tigris.org/issues/show_bug.cgi?id=2356 152# http://scons.tigris.org/issues/show_bug.cgi?id=2611 153# This hack lets us extract the help text from AddOptions and 154# re-inject it via Help(). Ideally someday this bug will be fixed and 155# we can just use AddOption directly. 156def AddLocalOption(*args, **kwargs): 157 col_width = 30 158 159 help = " " + ", ".join(args) 160 if "help" in kwargs: 161 length = len(help) 162 if length >= col_width: 163 help += "\n" + " " * col_width 164 else: 165 help += " " * (col_width - length) 166 help += kwargs["help"] 167 help_texts["options"] += help + "\n" 168 169 AddOption(*args, **kwargs) 170 171AddLocalOption('--colors', dest='use_colors', action='store_true', 172 help="Add color to abbreviated scons output") 173AddLocalOption('--no-colors', dest='use_colors', action='store_false', 174 help="Don't add color to abbreviated scons output") 175AddLocalOption('--default', dest='default', type='string', action='store', 176 help='Override which build_opts file to use for defaults') 177AddLocalOption('--ignore-style', dest='ignore_style', action='store_true', 178 help='Disable style checking hooks') 179AddLocalOption('--no-lto', dest='no_lto', action='store_true', 180 help='Disable Link-Time Optimization for fast') 181AddLocalOption('--update-ref', dest='update_ref', action='store_true', 182 help='Update test reference outputs') 183AddLocalOption('--verbose', dest='verbose', action='store_true', 184 help='Print full tool command lines') 185 186termcap = get_termcap(GetOption('use_colors')) 187 188######################################################################## 189# 190# Set up the main build environment. 191# 192######################################################################## 193use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 194 'LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH', 'PYTHONPATH', 195 'RANLIB', 'SWIG' ]) 196 197use_prefixes = [ 198 "M5", # M5 configuration (e.g., path to kernels) 199 "DISTCC_", # distcc (distributed compiler wrapper) configuration 200 "CCACHE_", # ccache (caching compiler wrapper) configuration 201 "CCC_", # clang static analyzer configuration 202 ] 203 204use_env = {} 205for key,val in os.environ.iteritems(): 206 if key in use_vars or \ 207 any([key.startswith(prefix) for prefix in use_prefixes]): 208 use_env[key] = val 209 210main = Environment(ENV=use_env) 211main.Decider('MD5-timestamp') 212main.root = Dir(".") # The current directory (where this file lives). 213main.srcdir = Dir("src") # The source directory 214 215main_dict_keys = main.Dictionary().keys() 216 217# Check that we have a C/C++ compiler 218if not ('CC' in main_dict_keys and 'CXX' in main_dict_keys): 219 print "No C++ compiler installed (package g++ on Ubuntu and RedHat)" 220 Exit(1) 221 222# Check that swig is present 223if not 'SWIG' in main_dict_keys: 224 print "swig is not installed (package swig on Ubuntu and RedHat)" 225 Exit(1) 226 227# add useful python code PYTHONPATH so it can be used by subprocesses 228# as well 229main.AppendENVPath('PYTHONPATH', extra_python_paths) 230 231######################################################################## 232# 233# Mercurial Stuff. 234# 235# If the gem5 directory is a mercurial repository, we should do some 236# extra things. 237# 238######################################################################## 239 240hgdir = main.root.Dir(".hg") 241 242mercurial_style_message = """ 243You're missing the gem5 style hook, which automatically checks your code 244against the gem5 style rules on hg commit and qrefresh commands. This 245script will now install the hook in your .hg/hgrc file. 246Press enter to continue, or ctrl-c to abort: """ 247 248mercurial_style_hook = """ 249# The following lines were automatically added by gem5/SConstruct 250# to provide the gem5 style-checking hooks 251[extensions] 252style = %s/util/style.py 253 254[hooks] 255pretxncommit.style = python:style.check_style 256pre-qrefresh.style = python:style.check_style 257# End of SConstruct additions 258 259""" % (main.root.abspath) 260 261mercurial_lib_not_found = """ 262Mercurial libraries cannot be found, ignoring style hook. If 263you are a gem5 developer, please fix this and run the style 264hook. It is important. 265""" 266 267# Check for style hook and prompt for installation if it's not there. 268# Skip this if --ignore-style was specified, there's no .hg dir to 269# install a hook in, or there's no interactive terminal to prompt. 270if not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty(): 271 style_hook = True 272 try: 273 from mercurial import ui 274 ui = ui.ui() 275 ui.readconfig(hgdir.File('hgrc').abspath) 276 style_hook = ui.config('hooks', 'pretxncommit.style', None) and \ 277 ui.config('hooks', 'pre-qrefresh.style', None) 278 except ImportError: 279 print mercurial_lib_not_found 280 281 if not style_hook: 282 print mercurial_style_message, 283 # continue unless user does ctrl-c/ctrl-d etc. 284 try: 285 raw_input() 286 except: 287 print "Input exception, exiting scons.\n" 288 sys.exit(1) 289 hgrc_path = '%s/.hg/hgrc' % main.root.abspath 290 print "Adding style hook to", hgrc_path, "\n" 291 try: 292 hgrc = open(hgrc_path, 'a') 293 hgrc.write(mercurial_style_hook) 294 hgrc.close() 295 except: 296 print "Error updating", hgrc_path 297 sys.exit(1) 298 299 300################################################### 301# 302# Figure out which configurations to set up based on the path(s) of 303# the target(s). 304# 305################################################### 306 307# Find default configuration & binary. 308Default(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug')) 309 310# helper function: find last occurrence of element in list 311def rfind(l, elt, offs = -1): 312 for i in range(len(l)+offs, 0, -1): 313 if l[i] == elt: 314 return i 315 raise ValueError, "element not found" 316 317# Take a list of paths (or SCons Nodes) and return a list with all 318# paths made absolute and ~-expanded. Paths will be interpreted 319# relative to the launch directory unless a different root is provided 320def makePathListAbsolute(path_list, root=GetLaunchDir()): 321 return [abspath(joinpath(root, expanduser(str(p)))) 322 for p in path_list] 323 324# Each target must have 'build' in the interior of the path; the 325# directory below this will determine the build parameters. For 326# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we 327# recognize that ALPHA_SE specifies the configuration because it 328# follow 'build' in the build path. 329 330# The funky assignment to "[:]" is needed to replace the list contents 331# in place rather than reassign the symbol to a new list, which 332# doesn't work (obviously!). 333BUILD_TARGETS[:] = makePathListAbsolute(BUILD_TARGETS) 334 335# Generate a list of the unique build roots and configs that the 336# collected targets reference. 337variant_paths = [] 338build_root = None 339for t in BUILD_TARGETS: 340 path_dirs = t.split('/') 341 try: 342 build_top = rfind(path_dirs, 'build', -2) 343 except: 344 print "Error: no non-leaf 'build' dir found on target path", t 345 Exit(1) 346 this_build_root = joinpath('/',*path_dirs[:build_top+1]) 347 if not build_root: 348 build_root = this_build_root 349 else: 350 if this_build_root != build_root: 351 print "Error: build targets not under same build root\n"\ 352 " %s\n %s" % (build_root, this_build_root) 353 Exit(1) 354 variant_path = joinpath('/',*path_dirs[:build_top+2]) 355 if variant_path not in variant_paths: 356 variant_paths.append(variant_path) 357 358# Make sure build_root exists (might not if this is the first build there) 359if not isdir(build_root): 360 mkdir(build_root) 361main['BUILDROOT'] = build_root 362 363Export('main') 364 365main.SConsignFile(joinpath(build_root, "sconsign")) 366 367# Default duplicate option is to use hard links, but this messes up 368# when you use emacs to edit a file in the target dir, as emacs moves 369# file to file~ then copies to file, breaking the link. Symbolic 370# (soft) links work better. 371main.SetOption('duplicate', 'soft-copy') 372 373# 374# Set up global sticky variables... these are common to an entire build 375# tree (not specific to a particular build like ALPHA_SE) 376# 377 378global_vars_file = joinpath(build_root, 'variables.global') 379 380global_vars = Variables(global_vars_file, args=ARGUMENTS) 381 382global_vars.AddVariables( 383 ('CC', 'C compiler', environ.get('CC', main['CC'])), 384 ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])), 385 ('SWIG', 'SWIG tool', environ.get('SWIG', main['SWIG'])), 386 ('PROTOC', 'protoc tool', environ.get('PROTOC', 'protoc')), 387 ('BATCH', 'Use batch pool for build and tests', False), 388 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'), 389 ('M5_BUILD_CACHE', 'Cache built objects in this directory', False), 390 ('EXTRAS', 'Add extra directories to the compilation', '') 391 ) 392 393# Update main environment with values from ARGUMENTS & global_vars_file 394global_vars.Update(main) 395help_texts["global_vars"] += global_vars.GenerateHelpText(main) 396 397# Save sticky variable settings back to current variables file 398global_vars.Save(global_vars_file, main) 399 400# Parse EXTRAS variable to build list of all directories where we're 401# look for sources etc. This list is exported as extras_dir_list. 402base_dir = main.srcdir.abspath 403if main['EXTRAS']: 404 extras_dir_list = makePathListAbsolute(main['EXTRAS'].split(':')) 405else: 406 extras_dir_list = [] 407 408Export('base_dir') 409Export('extras_dir_list') 410 411# the ext directory should be on the #includes path 412main.Append(CPPPATH=[Dir('ext')]) 413 414def strip_build_path(path, env): 415 path = str(path) 416 variant_base = env['BUILDROOT'] + os.path.sep 417 if path.startswith(variant_base): 418 path = path[len(variant_base):] 419 elif path.startswith('build/'): 420 path = path[6:] 421 return path 422 423# Generate a string of the form: 424# common/path/prefix/src1, src2 -> tgt1, tgt2 425# to print while building. 426class Transform(object): 427 # all specific color settings should be here and nowhere else 428 tool_color = termcap.Normal 429 pfx_color = termcap.Yellow 430 srcs_color = termcap.Yellow + termcap.Bold 431 arrow_color = termcap.Blue + termcap.Bold 432 tgts_color = termcap.Yellow + termcap.Bold 433 434 def __init__(self, tool, max_sources=99): 435 self.format = self.tool_color + (" [%8s] " % tool) \ 436 + self.pfx_color + "%s" \ 437 + self.srcs_color + "%s" \ 438 + self.arrow_color + " -> " \ 439 + self.tgts_color + "%s" \ 440 + termcap.Normal 441 self.max_sources = max_sources 442 443 def __call__(self, target, source, env, for_signature=None): 444 # truncate source list according to max_sources param 445 source = source[0:self.max_sources] 446 def strip(f): 447 return strip_build_path(str(f), env) 448 if len(source) > 0: 449 srcs = map(strip, source) 450 else: 451 srcs = [''] 452 tgts = map(strip, target) 453 # surprisingly, os.path.commonprefix is a dumb char-by-char string 454 # operation that has nothing to do with paths. 455 com_pfx = os.path.commonprefix(srcs + tgts) 456 com_pfx_len = len(com_pfx) 457 if com_pfx: 458 # do some cleanup and sanity checking on common prefix 459 if com_pfx[-1] == ".": 460 # prefix matches all but file extension: ok 461 # back up one to change 'foo.cc -> o' to 'foo.cc -> .o' 462 com_pfx = com_pfx[0:-1] 463 elif com_pfx[-1] == "/": 464 # common prefix is directory path: OK 465 pass 466 else: 467 src0_len = len(srcs[0]) 468 tgt0_len = len(tgts[0]) 469 if src0_len == com_pfx_len: 470 # source is a substring of target, OK 471 pass 472 elif tgt0_len == com_pfx_len: 473 # target is a substring of source, need to back up to 474 # avoid empty string on RHS of arrow 475 sep_idx = com_pfx.rfind(".") 476 if sep_idx != -1: 477 com_pfx = com_pfx[0:sep_idx] 478 else: 479 com_pfx = '' 480 elif src0_len > com_pfx_len and srcs[0][com_pfx_len] == ".": 481 # still splitting at file extension: ok 482 pass 483 else: 484 # probably a fluke; ignore it 485 com_pfx = '' 486 # recalculate length in case com_pfx was modified 487 com_pfx_len = len(com_pfx) 488 def fmt(files): 489 f = map(lambda s: s[com_pfx_len:], files) 490 return ', '.join(f) 491 return self.format % (com_pfx, fmt(srcs), fmt(tgts)) 492 493Export('Transform') 494 495# enable the regression script to use the termcap 496main['TERMCAP'] = termcap 497 498if GetOption('verbose'): 499 def MakeAction(action, string, *args, **kwargs): 500 return Action(action, *args, **kwargs) 501else: 502 MakeAction = Action 503 main['CCCOMSTR'] = Transform("CC") 504 main['CXXCOMSTR'] = Transform("CXX") 505 main['ASCOMSTR'] = Transform("AS") 506 main['SWIGCOMSTR'] = Transform("SWIG") 507 main['ARCOMSTR'] = Transform("AR", 0) 508 main['LINKCOMSTR'] = Transform("LINK", 0) 509 main['RANLIBCOMSTR'] = Transform("RANLIB", 0) 510 main['M4COMSTR'] = Transform("M4") 511 main['SHCCCOMSTR'] = Transform("SHCC") 512 main['SHCXXCOMSTR'] = Transform("SHCXX") 513Export('MakeAction') 514 515# Initialize the Link-Time Optimization (LTO) flags 516main['LTO_CCFLAGS'] = [] 517main['LTO_LDFLAGS'] = [] 518 519# According to the readme, tcmalloc works best if the compiler doesn't 520# assume that we're using the builtin malloc and friends. These flags 521# are compiler-specific, so we need to set them after we detect which 522# compiler we're using. 523main['TCMALLOC_CCFLAGS'] = [] 524 525CXX_version = readCommand([main['CXX'],'--version'], exception=False) 526CXX_V = readCommand([main['CXX'],'-V'], exception=False) 527 528main['GCC'] = CXX_version and CXX_version.find('g++') >= 0 529main['CLANG'] = CXX_version and CXX_version.find('clang') >= 0 530if main['GCC'] + main['CLANG'] > 1: 531 print 'Error: How can we have two at the same time?' 532 Exit(1) 533 534# Set up default C++ compiler flags 535if main['GCC'] or main['CLANG']: 536 # As gcc and clang share many flags, do the common parts here 537 main.Append(CCFLAGS=['-pipe']) 538 main.Append(CCFLAGS=['-fno-strict-aliasing']) 539 # Enable -Wall and then disable the few warnings that we 540 # consistently violate 541 main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef']) 542 # We always compile using C++11, but only gcc >= 4.7 and clang 3.1 543 # actually use that name, so we stick with c++0x 544 main.Append(CXXFLAGS=['-std=c++0x']) 545 # Add selected sanity checks from -Wextra 546 main.Append(CXXFLAGS=['-Wmissing-field-initializers', 547 '-Woverloaded-virtual']) 548else: 549 print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, 550 print "Don't know what compiler options to use for your compiler." 551 print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX'] 552 print termcap.Yellow + ' version:' + termcap.Normal, 553 if not CXX_version: 554 print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\ 555 termcap.Normal 556 else: 557 print CXX_version.replace('\n', '<nl>') 558 print " If you're trying to use a compiler other than GCC" 559 print " or clang, there appears to be something wrong with your" 560 print " environment." 561 print " " 562 print " If you are trying to use a compiler other than those listed" 563 print " above you will need to ease fix SConstruct and " 564 print " src/SConscript to support that compiler." 565 Exit(1) 566 567if main['GCC']: 568 # Check for a supported version of gcc, >= 4.4 is needed for c++0x 569 # support. See http://gcc.gnu.org/projects/cxx0x.html for details 570 gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False) 571 if compareVersions(gcc_version, "4.4") < 0: 572 print 'Error: gcc version 4.4 or newer required.' 573 print ' Installed version:', gcc_version 574 Exit(1) 575 576 main['GCC_VERSION'] = gcc_version 577 578 # Check for versions with bugs 579 if not compareVersions(gcc_version, '4.4.1') or \ 580 not compareVersions(gcc_version, '4.4.2'): 581 print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.' 582 main.Append(CCFLAGS=['-fno-tree-vectorize']) 583 584 # LTO support is only really working properly from 4.6 and beyond 585 if compareVersions(gcc_version, '4.6') >= 0: 586 # Add the appropriate Link-Time Optimization (LTO) flags 587 # unless LTO is explicitly turned off. Note that these flags 588 # are only used by the fast target. 589 if not GetOption('no_lto'): 590 # Pass the LTO flag when compiling to produce GIMPLE 591 # output, we merely create the flags here and only append 592 # them later/ 593 main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] 594 595 # Use the same amount of jobs for LTO as we are running 596 # scons with, we hardcode the use of the linker plugin 597 # which requires either gold or GNU ld >= 2.21 598 main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs'), 599 '-fuse-linker-plugin'] 600 601 main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc', 602 '-fno-builtin-realloc', '-fno-builtin-free']) 603 604elif main['CLANG']: 605 # Check for a supported version of clang, >= 2.9 is needed to 606 # support similar features as gcc 4.4. See 607 # http://clang.llvm.org/cxx_status.html for details 608 clang_version_re = re.compile(".* version (\d+\.\d+)") 609 clang_version_match = clang_version_re.match(CXX_version) 610 if (clang_version_match): 611 clang_version = clang_version_match.groups()[0] 612 if compareVersions(clang_version, "2.9") < 0: 613 print 'Error: clang version 2.9 or newer required.' 614 print ' Installed version:', clang_version 615 Exit(1) 616 else: 617 print 'Error: Unable to determine clang version.' 618 Exit(1) 619 620 # clang has a few additional warnings that we disable, 621 # tautological comparisons are allowed due to unsigned integers 622 # being compared to constants that happen to be 0, and extraneous 623 # parantheses are allowed due to Ruby's printing of the AST, 624 # finally self assignments are allowed as the generated CPU code 625 # is relying on this 626 main.Append(CCFLAGS=['-Wno-tautological-compare', 627 '-Wno-parentheses', 628 '-Wno-self-assign']) 629 630 main.Append(TCMALLOC_CCFLAGS=['-fno-builtin']) 631 632 # On Mac OS X/Darwin we need to also use libc++ (part of XCode) as 633 # opposed to libstdc++, as the later is dated. 634 if sys.platform == "darwin": 635 main.Append(CXXFLAGS=['-stdlib=libc++']) 636 main.Append(LIBS=['c++']) 637 638else: 639 print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, 640 print "Don't know what compiler options to use for your compiler." 641 print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX'] 642 print termcap.Yellow + ' version:' + termcap.Normal, 643 if not CXX_version: 644 print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\ 645 termcap.Normal 646 else: 647 print CXX_version.replace('\n', '<nl>') 648 print " If you're trying to use a compiler other than GCC" 649 print " or clang, there appears to be something wrong with your" 650 print " environment." 651 print " " 652 print " If you are trying to use a compiler other than those listed" 653 print " above you will need to ease fix SConstruct and " 654 print " src/SConscript to support that compiler." 655 Exit(1) 656 657# Set up common yacc/bison flags (needed for Ruby) 658main['YACCFLAGS'] = '-d' 659main['YACCHXXFILESUFFIX'] = '.hh' 660 661# Do this after we save setting back, or else we'll tack on an 662# extra 'qdo' every time we run scons. 663if main['BATCH']: 664 main['CC'] = main['BATCH_CMD'] + ' ' + main['CC'] 665 main['CXX'] = main['BATCH_CMD'] + ' ' + main['CXX'] 666 main['AS'] = main['BATCH_CMD'] + ' ' + main['AS'] 667 main['AR'] = main['BATCH_CMD'] + ' ' + main['AR'] 668 main['RANLIB'] = main['BATCH_CMD'] + ' ' + main['RANLIB'] 669 670if sys.platform == 'cygwin': 671 # cygwin has some header file issues... 672 main.Append(CCFLAGS=["-Wno-uninitialized"]) 673 674# Check for the protobuf compiler 675protoc_version = readCommand([main['PROTOC'], '--version'], 676 exception='').split() 677 678# First two words should be "libprotoc x.y.z" 679if len(protoc_version) < 2 or protoc_version[0] != 'libprotoc': 680 print termcap.Yellow + termcap.Bold + \ 681 'Warning: Protocol buffer compiler (protoc) not found.\n' + \ 682 ' Please install protobuf-compiler for tracing support.' + \ 683 termcap.Normal 684 main['PROTOC'] = False 685else: 686 # Based on the availability of the compress stream wrappers, 687 # require 2.1.0 688 min_protoc_version = '2.1.0' 689 if compareVersions(protoc_version[1], min_protoc_version) < 0: 690 print termcap.Yellow + termcap.Bold + \ 691 'Warning: protoc version', min_protoc_version, \ 692 'or newer required.\n' + \ 693 ' Installed version:', protoc_version[1], \ 694 termcap.Normal 695 main['PROTOC'] = False 696 else: 697 # Attempt to determine the appropriate include path and 698 # library path using pkg-config, that means we also need to 699 # check for pkg-config. Note that it is possible to use 700 # protobuf without the involvement of pkg-config. Later on we 701 # check go a library config check and at that point the test 702 # will fail if libprotobuf cannot be found. 703 if readCommand(['pkg-config', '--version'], exception=''): 704 try: 705 # Attempt to establish what linking flags to add for protobuf 706 # using pkg-config 707 main.ParseConfig('pkg-config --cflags --libs-only-L protobuf') 708 except: 709 print termcap.Yellow + termcap.Bold + \ 710 'Warning: pkg-config could not get protobuf flags.' + \ 711 termcap.Normal 712 713# Check for SWIG 714if not main.has_key('SWIG'): 715 print 'Error: SWIG utility not found.' 716 print ' Please install (see http://www.swig.org) and retry.' 717 Exit(1) 718 719# Check for appropriate SWIG version 720swig_version = readCommand([main['SWIG'], '-version'], exception='').split() 721# First 3 words should be "SWIG Version x.y.z" 722if len(swig_version) < 3 or \ 723 swig_version[0] != 'SWIG' or swig_version[1] != 'Version': 724 print 'Error determining SWIG version.' 725 Exit(1) 726 727min_swig_version = '1.3.34' 728if compareVersions(swig_version[2], min_swig_version) < 0: 729 print 'Error: SWIG version', min_swig_version, 'or newer required.' 730 print ' Installed version:', swig_version[2] 731 Exit(1) 732 733if swig_version[2] in ["2.0.9", "2.0.10"]: 734 print '\n' + termcap.Yellow + termcap.Bold + \ 735 'Warning: SWIG version 2.0.9/10 sometimes generates broken code.\n' + \ 736 termcap.Normal + \ 737 'This problem only affects some platforms and some Python\n' + \ 738 'versions. See the following SWIG bug report for details:\n' + \ 739 'http://sourceforge.net/p/swig/bugs/1297/\n' 740 741 742# Set up SWIG flags & scanner 743swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS') 744main.Append(SWIGFLAGS=swig_flags) 745 746# filter out all existing swig scanners, they mess up the dependency 747# stuff for some reason 748scanners = [] 749for scanner in main['SCANNERS']: 750 skeys = scanner.skeys 751 if skeys == '.i': 752 continue 753 754 if isinstance(skeys, (list, tuple)) and '.i' in skeys: 755 continue 756 757 scanners.append(scanner) 758 759# add the new swig scanner that we like better 760from SCons.Scanner import ClassicCPP as CPPScanner 761swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")' 762scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re)) 763 764# replace the scanners list that has what we want 765main['SCANNERS'] = scanners 766 767# Add a custom Check function to the Configure context so that we can 768# figure out if the compiler adds leading underscores to global 769# variables. This is needed for the autogenerated asm files that we 770# use for embedding the python code. 771def CheckLeading(context): 772 context.Message("Checking for leading underscore in global variables...") 773 # 1) Define a global variable called x from asm so the C compiler 774 # won't change the symbol at all. 775 # 2) Declare that variable. 776 # 3) Use the variable 777 # 778 # If the compiler prepends an underscore, this will successfully 779 # link because the external symbol 'x' will be called '_x' which 780 # was defined by the asm statement. If the compiler does not 781 # prepend an underscore, this will not successfully link because 782 # '_x' will have been defined by assembly, while the C portion of 783 # the code will be trying to use 'x' 784 ret = context.TryLink(''' 785 asm(".globl _x; _x: .byte 0"); 786 extern int x; 787 int main() { return x; } 788 ''', extension=".c") 789 context.env.Append(LEADING_UNDERSCORE=ret) 790 context.Result(ret) 791 return ret 792 793# Platform-specific configuration. Note again that we assume that all 794# builds under a given build root run on the same host platform. 795conf = Configure(main, 796 conf_dir = joinpath(build_root, '.scons_config'), 797 log_file = joinpath(build_root, 'scons_config.log'), 798 custom_tests = { 'CheckLeading' : CheckLeading }) 799 800# Check for leading underscores. Don't really need to worry either 801# way so don't need to check the return code. 802conf.CheckLeading() 803 804# Check if we should compile a 64 bit binary on Mac OS X/Darwin 805try: 806 import platform 807 uname = platform.uname() 808 if uname[0] == 'Darwin' and compareVersions(uname[2], '9.0.0') >= 0: 809 if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]): 810 main.Append(CCFLAGS=['-arch', 'x86_64']) 811 main.Append(CFLAGS=['-arch', 'x86_64']) 812 main.Append(LINKFLAGS=['-arch', 'x86_64']) 813 main.Append(ASFLAGS=['-arch', 'x86_64']) 814except: 815 pass 816 817# Recent versions of scons substitute a "Null" object for Configure() 818# when configuration isn't necessary, e.g., if the "--help" option is 819# present. Unfortuantely this Null object always returns false, 820# breaking all our configuration checks. We replace it with our own 821# more optimistic null object that returns True instead. 822if not conf: 823 def NullCheck(*args, **kwargs): 824 return True 825 826 class NullConf: 827 def __init__(self, env): 828 self.env = env 829 def Finish(self): 830 return self.env 831 def __getattr__(self, mname): 832 return NullCheck 833 834 conf = NullConf(main) 835 836# Cache build files in the supplied directory. 837if main['M5_BUILD_CACHE']: 838 print 'Using build cache located at', main['M5_BUILD_CACHE'] 839 CacheDir(main['M5_BUILD_CACHE']) 840 841# Find Python include and library directories for embedding the 842# interpreter. We rely on python-config to resolve the appropriate 843# includes and linker flags. ParseConfig does not seem to understand 844# the more exotic linker flags such as -Xlinker and -export-dynamic so 845# we add them explicitly below. If you want to link in an alternate 846# version of python, see above for instructions on how to invoke 847# scons with the appropriate PATH set. 848py_includes = readCommand(['python-config', '--includes'], 849 exception='').split() 850# Strip the -I from the include folders before adding them to the 851# CPPPATH 852main.Append(CPPPATH=map(lambda inc: inc[2:], py_includes)) 853 854# Read the linker flags and split them into libraries and other link 855# flags. The libraries are added later through the call the CheckLib. 856py_ld_flags = readCommand(['python-config', '--ldflags'], exception='').split() 857py_libs = [] 858for lib in py_ld_flags: 859 if not lib.startswith('-l'): 860 main.Append(LINKFLAGS=[lib]) 861 else: 862 lib = lib[2:] 863 if lib not in py_libs: 864 py_libs.append(lib) 865 866# verify that this stuff works 867if not conf.CheckHeader('Python.h', '<>'): 868 print "Error: can't find Python.h header in", py_includes 869 print "Install Python headers (package python-dev on Ubuntu and RedHat)" 870 Exit(1) 871 872for lib in py_libs: 873 if not conf.CheckLib(lib): 874 print "Error: can't find library %s required by python" % lib 875 Exit(1) 876 877# On Solaris you need to use libsocket for socket ops 878if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'): 879 if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'): 880 print "Can't find library with socket calls (e.g. accept())" 881 Exit(1) 882 883# Check for zlib. If the check passes, libz will be automatically 884# added to the LIBS environment variable. 885if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'): 886 print 'Error: did not find needed zlib compression library '\ 887 'and/or zlib.h header file.' 888 print ' Please install zlib and try again.' 889 Exit(1) 890 891# If we have the protobuf compiler, also make sure we have the 892# development libraries. If the check passes, libprotobuf will be 893# automatically added to the LIBS environment variable. After 894# this, we can use the HAVE_PROTOBUF flag to determine if we have 895# got both protoc and libprotobuf available. 896main['HAVE_PROTOBUF'] = main['PROTOC'] and \ 897 conf.CheckLibWithHeader('protobuf', 'google/protobuf/message.h', 898 'C++', 'GOOGLE_PROTOBUF_VERIFY_VERSION;') 899 900# If we have the compiler but not the library, print another warning. 901if main['PROTOC'] and not main['HAVE_PROTOBUF']: 902 print termcap.Yellow + termcap.Bold + \ 903 'Warning: did not find protocol buffer library and/or headers.\n' + \ 904 ' Please install libprotobuf-dev for tracing support.' + \ 905 termcap.Normal 906 907# Check for librt. 908have_posix_clock = \ 909 conf.CheckLibWithHeader(None, 'time.h', 'C', 910 'clock_nanosleep(0,0,NULL,NULL);') or \ 911 conf.CheckLibWithHeader('rt', 'time.h', 'C', 912 'clock_nanosleep(0,0,NULL,NULL);') 913 914if conf.CheckLib('tcmalloc'): 915 main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) 916elif conf.CheckLib('tcmalloc_minimal'): 917 main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) 918else: 919 print termcap.Yellow + termcap.Bold + \ 920 "You can get a 12% performance improvement by installing tcmalloc "\ 921 "(libgoogle-perftools-dev package on Ubuntu or RedHat)." + \ 922 termcap.Normal 923 924if not have_posix_clock: 925 print "Can't find library for POSIX clocks." 926 927# Check for <fenv.h> (C99 FP environment control) 928have_fenv = conf.CheckHeader('fenv.h', '<>') 929if not have_fenv: 930 print "Warning: Header file <fenv.h> not found." 931 print " This host has no IEEE FP rounding mode control." 932 933# Check if we should enable KVM-based hardware virtualization 934have_kvm = conf.CheckHeader('linux/kvm.h', '<>') 935if not have_kvm: 936 print "Info: Header file <linux/kvm.h> not found, " \ 937 "disabling KVM support." 938 939# Check if the requested target ISA is compatible with the host 940def is_isa_kvm_compatible(isa): 941 isa_comp_table = { 942 "arm" : ( "armv7l" ), 943 } 944 try: 945 import platform 946 host_isa = platform.machine() 947 except: 948 print "Warning: Failed to determine host ISA." 949 return False 950 951 return host_isa in isa_comp_table.get(isa, []) 952 953 954###################################################################### 955# 956# Finish the configuration 957# 958main = conf.Finish() 959 960###################################################################### 961# 962# Collect all non-global variables 963# 964 965# Define the universe of supported ISAs 966all_isa_list = [ ] 967Export('all_isa_list') 968 969class CpuModel(object): 970 '''The CpuModel class encapsulates everything the ISA parser needs to 971 know about a particular CPU model.''' 972 973 # Dict of available CPU model objects. Accessible as CpuModel.dict. 974 dict = {} 975 list = [] 976 defaults = [] 977 978 # Constructor. Automatically adds models to CpuModel.dict. 979 def __init__(self, name, filename, includes, strings, default=False): 980 self.name = name # name of model 981 self.filename = filename # filename for output exec code 982 self.includes = includes # include files needed in exec file 983 # The 'strings' dict holds all the per-CPU symbols we can 984 # substitute into templates etc. 985 self.strings = strings 986 987 # This cpu is enabled by default 988 self.default = default 989 990 # Add self to dict 991 if name in CpuModel.dict: 992 raise AttributeError, "CpuModel '%s' already registered" % name 993 CpuModel.dict[name] = self 994 CpuModel.list.append(name) 995 996Export('CpuModel') 997 998# Sticky variables get saved in the variables file so they persist from 999# one invocation to the next (unless overridden, in which case the new 1000# value becomes sticky). 1001sticky_vars = Variables(args=ARGUMENTS) 1002Export('sticky_vars') 1003 1004# Sticky variables that should be exported 1005export_vars = [] 1006Export('export_vars') 1007 1008# For Ruby 1009all_protocols = [] 1010Export('all_protocols') 1011protocol_dirs = [] 1012Export('protocol_dirs') 1013slicc_includes = [] 1014Export('slicc_includes') 1015 1016# Walk the tree and execute all SConsopts scripts that wil add to the 1017# above variables 1018if not GetOption('verbose'): 1019 print "Reading SConsopts" 1020for bdir in [ base_dir ] + extras_dir_list: 1021 if not isdir(bdir): 1022 print "Error: directory '%s' does not exist" % bdir 1023 Exit(1) 1024 for root, dirs, files in os.walk(bdir): 1025 if 'SConsopts' in files: 1026 if GetOption('verbose'): 1027 print "Reading", joinpath(root, 'SConsopts') 1028 SConscript(joinpath(root, 'SConsopts')) 1029 1030all_isa_list.sort() 1031 1032sticky_vars.AddVariables( 1033 EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list), 1034 ListVariable('CPU_MODELS', 'CPU models', 1035 sorted(n for n,m in CpuModel.dict.iteritems() if m.default), 1036 sorted(CpuModel.list)), 1037 BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger', 1038 False), 1039 BoolVariable('SS_COMPATIBLE_FP', 1040 'Make floating-point results compatible with SimpleScalar', 1041 False), 1042 BoolVariable('USE_SSE2', 1043 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts', 1044 False), 1045 BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock), 1046 BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv), 1047 BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False), 1048 BoolVariable('USE_KVM', 'Enable hardware virtualized (KVM) CPU models', have_kvm), 1049 EnumVariable('PROTOCOL', 'Coherence protocol for Ruby', 'None', 1050 all_protocols), 1051 ) 1052 1053# These variables get exported to #defines in config/*.hh (see src/SConscript). 1054export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', 'TARGET_ISA', 'CP_ANNOTATE', 1055 'USE_POSIX_CLOCK', 'PROTOCOL', 'HAVE_PROTOBUF'] 1056 1057################################################### 1058# 1059# Define a SCons builder for configuration flag headers. 1060# 1061################################################### 1062 1063# This function generates a config header file that #defines the 1064# variable symbol to the current variable setting (0 or 1). The source 1065# operands are the name of the variable and a Value node containing the 1066# value of the variable. 1067def build_config_file(target, source, env): 1068 (variable, value) = [s.get_contents() for s in source] 1069 f = file(str(target[0]), 'w') 1070 print >> f, '#define', variable, value 1071 f.close() 1072 return None 1073 1074# Combine the two functions into a scons Action object. 1075config_action = MakeAction(build_config_file, Transform("CONFIG H", 2)) 1076 1077# The emitter munges the source & target node lists to reflect what 1078# we're really doing. 1079def config_emitter(target, source, env): 1080 # extract variable name from Builder arg 1081 variable = str(target[0]) 1082 # True target is config header file 1083 target = joinpath('config', variable.lower() + '.hh') 1084 val = env[variable] 1085 if isinstance(val, bool): 1086 # Force value to 0/1 1087 val = int(val) 1088 elif isinstance(val, str): 1089 val = '"' + val + '"' 1090 1091 # Sources are variable name & value (packaged in SCons Value nodes) 1092 return ([target], [Value(variable), Value(val)]) 1093 1094config_builder = Builder(emitter = config_emitter, action = config_action) 1095 1096main.Append(BUILDERS = { 'ConfigFile' : config_builder }) 1097 1098# libelf build is shared across all configs in the build root. 1099main.SConscript('ext/libelf/SConscript', 1100 variant_dir = joinpath(build_root, 'libelf')) 1101 1102# gzstream build is shared across all configs in the build root. 1103main.SConscript('ext/gzstream/SConscript', 1104 variant_dir = joinpath(build_root, 'gzstream')) 1105 1106# libfdt build is shared across all configs in the build root. 1107main.SConscript('ext/libfdt/SConscript', 1108 variant_dir = joinpath(build_root, 'libfdt')) 1109 1110################################################### 1111# 1112# This function is used to set up a directory with switching headers 1113# 1114################################################### 1115 1116main['ALL_ISA_LIST'] = all_isa_list 1117def make_switching_dir(dname, switch_headers, env): 1118 # Generate the header. target[0] is the full path of the output 1119 # header to generate. 'source' is a dummy variable, since we get the 1120 # list of ISAs from env['ALL_ISA_LIST']. 1121 def gen_switch_hdr(target, source, env): 1122 fname = str(target[0]) 1123 f = open(fname, 'w') 1124 isa = env['TARGET_ISA'].lower() 1125 print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname)) 1126 f.close() 1127 1128 # Build SCons Action object. 'varlist' specifies env vars that this 1129 # action depends on; when env['ALL_ISA_LIST'] changes these actions 1130 # should get re-executed. 1131 switch_hdr_action = MakeAction(gen_switch_hdr, 1132 Transform("GENERATE"), varlist=['ALL_ISA_LIST']) 1133 1134 # Instantiate actions for each header 1135 for hdr in switch_headers: 1136 env.Command(hdr, [], switch_hdr_action) 1137Export('make_switching_dir') 1138 1139################################################### 1140# 1141# Define build environments for selected configurations. 1142# 1143################################################### 1144 1145for variant_path in variant_paths: 1146 print "Building in", variant_path 1147 1148 # Make a copy of the build-root environment to use for this config. 1149 env = main.Clone() 1150 env['BUILDDIR'] = variant_path 1151 1152 # variant_dir is the tail component of build path, and is used to 1153 # determine the build parameters (e.g., 'ALPHA_SE') 1154 (build_root, variant_dir) = splitpath(variant_path) 1155 1156 # Set env variables according to the build directory config. 1157 sticky_vars.files = [] 1158 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in 1159 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke 1160 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings. 1161 current_vars_file = joinpath(build_root, 'variables', variant_dir) 1162 if isfile(current_vars_file): 1163 sticky_vars.files.append(current_vars_file) 1164 print "Using saved variables file %s" % current_vars_file 1165 else: 1166 # Build dir-specific variables file doesn't exist. 1167 1168 # Make sure the directory is there so we can create it later 1169 opt_dir = dirname(current_vars_file) 1170 if not isdir(opt_dir): 1171 mkdir(opt_dir) 1172 1173 # Get default build variables from source tree. Variables are 1174 # normally determined by name of $VARIANT_DIR, but can be 1175 # overridden by '--default=' arg on command line. 1176 default = GetOption('default') 1177 opts_dir = joinpath(main.root.abspath, 'build_opts') 1178 if default: 1179 default_vars_files = [joinpath(build_root, 'variables', default), 1180 joinpath(opts_dir, default)] 1181 else: 1182 default_vars_files = [joinpath(opts_dir, variant_dir)] 1183 existing_files = filter(isfile, default_vars_files) 1184 if existing_files: 1185 default_vars_file = existing_files[0] 1186 sticky_vars.files.append(default_vars_file) 1187 print "Variables file %s not found,\n using defaults in %s" \ 1188 % (current_vars_file, default_vars_file) 1189 else: 1190 print "Error: cannot find variables file %s or " \ 1191 "default file(s) %s" \ 1192 % (current_vars_file, ' or '.join(default_vars_files)) 1193 Exit(1) 1194 1195 # Apply current variable settings to env 1196 sticky_vars.Update(env) 1197 1198 help_texts["local_vars"] += \ 1199 "Build variables for %s:\n" % variant_dir \ 1200 + sticky_vars.GenerateHelpText(env) 1201 1202 # Process variable settings. 1203 1204 if not have_fenv and env['USE_FENV']: 1205 print "Warning: <fenv.h> not available; " \ 1206 "forcing USE_FENV to False in", variant_dir + "." 1207 env['USE_FENV'] = False 1208 1209 if not env['USE_FENV']: 1210 print "Warning: No IEEE FP rounding mode control in", variant_dir + "." 1211 print " FP results may deviate slightly from other platforms." 1212 1213 if env['EFENCE']: 1214 env.Append(LIBS=['efence']) 1215 1216 if env['USE_KVM']: 1217 if not have_kvm: 1218 print "Warning: Can not enable KVM, host seems to lack KVM support" 1219 env['USE_KVM'] = False 1220 elif not is_isa_kvm_compatible(env['TARGET_ISA']): 1221 print "Info: KVM support disabled due to unsupported host and " \ 1222 "target ISA combination" 1223 env['USE_KVM'] = False 1224 1225 # Save sticky variable settings back to current variables file 1226 sticky_vars.Save(current_vars_file, env) 1227 1228 if env['USE_SSE2']: 1229 env.Append(CCFLAGS=['-msse2']) 1230 1231 # The src/SConscript file sets up the build rules in 'env' according 1232 # to the configured variables. It returns a list of environments, 1233 # one for each variant build (debug, opt, etc.) 1234 envList = SConscript('src/SConscript', variant_dir = variant_path, 1235 exports = 'env') 1236 1237 # Set up the regression tests for each build. 1238 for e in envList: 1239 SConscript('tests/SConscript', 1240 variant_dir = joinpath(variant_path, 'tests', e.Label), 1241 exports = { 'env' : e }, duplicate = False) 1242 1243# base help text 1244Help(''' 1245Usage: scons [scons options] [build variables] [target(s)] 1246 1247Extra scons options: 1248%(options)s 1249 1250Global build variables: 1251%(global_vars)s 1252 1253%(local_vars)s 1254''' % help_texts) 1255