SConstruct revision 3716:70d75ce167a3
1# -*- mode:python -*- 2 3# Copyright (c) 2004-2005 The Regents of The University of Michigan 4# All rights reserved. 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions are 8# met: redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer; 10# redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution; 13# neither the name of the copyright holders nor the names of its 14# contributors may be used to endorse or promote products derived from 15# this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28# 29# Authors: Steve Reinhardt 30 31################################################### 32# 33# SCons top-level build description (SConstruct) file. 34# 35# While in this directory ('m5'), just type 'scons' to build the default 36# configuration (see below), or type 'scons build/<CONFIG>/<binary>' 37# to build some other configuration (e.g., 'build/ALPHA_FS/m5.opt' for 38# the optimized full-system version). 39# 40# You can build M5 in a different directory as long as there is a 41# 'build/<CONFIG>' somewhere along the target path. The build system 42# expects that all configs under the same build directory are being 43# built for the same host system. 44# 45# Examples: 46# 47# The following two commands are equivalent. The '-u' option tells 48# scons to search up the directory tree for this SConstruct file. 49# % cd <path-to-src>/m5 ; scons build/ALPHA_FS/m5.debug 50# % cd <path-to-src>/m5/build/ALPHA_FS; scons -u m5.debug 51# 52# The following two commands are equivalent and demonstrate building 53# in a directory outside of the source tree. The '-C' option tells 54# scons to chdir to the specified directory to find this SConstruct 55# file. 56# % cd <path-to-src>/m5 ; scons /local/foo/build/ALPHA_FS/m5.debug 57# % cd /local/foo/build/ALPHA_FS; scons -C <path-to-src>/m5 m5.debug 58# 59# You can use 'scons -H' to print scons options. If you're in this 60# 'm5' directory (or use -u or -C to tell scons where to find this 61# file), you can use 'scons -h' to print all the M5-specific build 62# options as well. 63# 64################################################### 65 66# Python library imports 67import sys 68import os 69from os.path import join as joinpath 70 71# Check for recent-enough Python and SCons versions. If your system's 72# default installation of Python is not recent enough, you can use a 73# non-default installation of the Python interpreter by either (1) 74# rearranging your PATH so that scons finds the non-default 'python' 75# first or (2) explicitly invoking an alternative interpreter on the 76# scons script, e.g., "/usr/local/bin/python2.4 `which scons` [args]". 77EnsurePythonVersion(2,4) 78 79# Ironically, SCons 0.96 dies if you give EnsureSconsVersion a 80# 3-element version number. 81min_scons_version = (0,96,91) 82try: 83 EnsureSConsVersion(*min_scons_version) 84except: 85 print "Error checking current SCons version." 86 print "SCons", ".".join(map(str,min_scons_version)), "or greater required." 87 Exit(2) 88 89 90# The absolute path to the current directory (where this file lives). 91ROOT = Dir('.').abspath 92 93# Paths to the M5 and external source trees. 94SRCDIR = joinpath(ROOT, 'src') 95 96# tell python where to find m5 python code 97sys.path.append(joinpath(ROOT, 'src/python')) 98 99################################################### 100# 101# Figure out which configurations to set up based on the path(s) of 102# the target(s). 103# 104################################################### 105 106# Find default configuration & binary. 107Default(os.environ.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug')) 108 109# Ask SCons which directory it was invoked from. 110launch_dir = GetLaunchDir() 111 112# Make targets relative to invocation directory 113abs_targets = map(lambda x: os.path.normpath(joinpath(launch_dir, str(x))), 114 BUILD_TARGETS) 115 116# helper function: find last occurrence of element in list 117def rfind(l, elt, offs = -1): 118 for i in range(len(l)+offs, 0, -1): 119 if l[i] == elt: 120 return i 121 raise ValueError, "element not found" 122 123# helper function: compare dotted version numbers. 124# E.g., compare_version('1.3.25', '1.4.1') 125# returns -1, 0, 1 if v1 is <, ==, > v2 126def compare_versions(v1, v2): 127 # Convert dotted strings to lists 128 v1 = map(int, v1.split('.')) 129 v2 = map(int, v2.split('.')) 130 # Compare corresponding elements of lists 131 for n1,n2 in zip(v1, v2): 132 if n1 < n2: return -1 133 if n1 > n2: return 1 134 # all corresponding values are equal... see if one has extra values 135 if len(v1) < len(v2): return -1 136 if len(v1) > len(v2): return 1 137 return 0 138 139# Each target must have 'build' in the interior of the path; the 140# directory below this will determine the build parameters. For 141# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we 142# recognize that ALPHA_SE specifies the configuration because it 143# follow 'build' in the bulid path. 144 145# Generate a list of the unique build roots and configs that the 146# collected targets reference. 147build_paths = [] 148build_root = None 149for t in abs_targets: 150 path_dirs = t.split('/') 151 try: 152 build_top = rfind(path_dirs, 'build', -2) 153 except: 154 print "Error: no non-leaf 'build' dir found on target path", t 155 Exit(1) 156 this_build_root = joinpath('/',*path_dirs[:build_top+1]) 157 if not build_root: 158 build_root = this_build_root 159 else: 160 if this_build_root != build_root: 161 print "Error: build targets not under same build root\n"\ 162 " %s\n %s" % (build_root, this_build_root) 163 Exit(1) 164 build_path = joinpath('/',*path_dirs[:build_top+2]) 165 if build_path not in build_paths: 166 build_paths.append(build_path) 167 168################################################### 169# 170# Set up the default build environment. This environment is copied 171# and modified according to each selected configuration. 172# 173################################################### 174 175env = Environment(ENV = os.environ, # inherit user's environment vars 176 ROOT = ROOT, 177 SRCDIR = SRCDIR) 178 179#Parse CC/CXX early so that we use the correct compiler for 180# to test for dependencies/versions/libraries/includes 181if ARGUMENTS.get('CC', None): 182 env['CC'] = ARGUMENTS.get('CC') 183 184if ARGUMENTS.get('CXX', None): 185 env['CXX'] = ARGUMENTS.get('CXX') 186 187env.SConsignFile(joinpath(build_root,"sconsign")) 188 189# Default duplicate option is to use hard links, but this messes up 190# when you use emacs to edit a file in the target dir, as emacs moves 191# file to file~ then copies to file, breaking the link. Symbolic 192# (soft) links work better. 193env.SetOption('duplicate', 'soft-copy') 194 195# I waffle on this setting... it does avoid a few painful but 196# unnecessary builds, but it also seems to make trivial builds take 197# noticeably longer. 198if False: 199 env.TargetSignatures('content') 200 201# M5_PLY is used by isa_parser.py to find the PLY package. 202env.Append(ENV = { 'M5_PLY' : Dir('ext/ply') }) 203 204# Set up default C++ compiler flags 205env.Append(CCFLAGS='-pipe') 206env.Append(CCFLAGS='-fno-strict-aliasing') 207env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef')) 208if sys.platform == 'cygwin': 209 # cygwin has some header file issues... 210 env.Append(CCFLAGS=Split("-Wno-uninitialized")) 211env.Append(CPPPATH=[Dir('ext/dnet')]) 212 213# Check for SWIG 214if not env.has_key('SWIG'): 215 print 'Error: SWIG utility not found.' 216 print ' Please install (see http://www.swig.org) and retry.' 217 Exit(1) 218 219# Check for appropriate SWIG version 220swig_version = os.popen('swig -version').read().split() 221# First 3 words should be "SWIG Version x.y.z" 222if swig_version[0] != 'SWIG' or swig_version[1] != 'Version': 223 print 'Error determining SWIG version.' 224 Exit(1) 225 226min_swig_version = '1.3.28' 227if compare_versions(swig_version[2], min_swig_version) < 0: 228 print 'Error: SWIG version', min_swig_version, 'or newer required.' 229 print ' Installed version:', swig_version[2] 230 Exit(1) 231 232# Set up SWIG flags & scanner 233env.Append(SWIGFLAGS=Split('-c++ -python -modern $_CPPINCFLAGS')) 234 235import SCons.Scanner 236 237swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")' 238 239swig_scanner = SCons.Scanner.ClassicCPP("SwigScan", ".i", "CPPPATH", 240 swig_inc_re) 241 242env.Append(SCANNERS = swig_scanner) 243 244# Platform-specific configuration. Note again that we assume that all 245# builds under a given build root run on the same host platform. 246conf = Configure(env, 247 conf_dir = joinpath(build_root, '.scons_config'), 248 log_file = joinpath(build_root, 'scons_config.log')) 249 250# Find Python include and library directories for embedding the 251# interpreter. For consistency, we will use the same Python 252# installation used to run scons (and thus this script). If you want 253# to link in an alternate version, see above for instructions on how 254# to invoke scons with a different copy of the Python interpreter. 255 256# Get brief Python version name (e.g., "python2.4") for locating 257# include & library files 258py_version_name = 'python' + sys.version[:3] 259 260# include path, e.g. /usr/local/include/python2.4 261py_header_path = joinpath(sys.exec_prefix, 'include', py_version_name) 262env.Append(CPPPATH = py_header_path) 263# verify that it works 264if not conf.CheckHeader('Python.h', '<>'): 265 print "Error: can't find Python.h header in", py_header_path 266 Exit(1) 267 268# add library path too if it's not in the default place 269py_lib_path = None 270if sys.exec_prefix != '/usr': 271 py_lib_path = joinpath(sys.exec_prefix, 'lib') 272elif sys.platform == 'cygwin': 273 # cygwin puts the .dll in /bin for some reason 274 py_lib_path = '/bin' 275if py_lib_path: 276 env.Append(LIBPATH = py_lib_path) 277 print 'Adding', py_lib_path, 'to LIBPATH for', py_version_name 278if not conf.CheckLib(py_version_name): 279 print "Error: can't find Python library", py_version_name 280 Exit(1) 281 282# On Solaris you need to use libsocket for socket ops 283if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'): 284 if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'): 285 print "Can't find library with socket calls (e.g. accept())" 286 Exit(1) 287 288# Check for zlib. If the check passes, libz will be automatically 289# added to the LIBS environment variable. 290if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++'): 291 print 'Error: did not find needed zlib compression library '\ 292 'and/or zlib.h header file.' 293 print ' Please install zlib and try again.' 294 Exit(1) 295 296# Check for <fenv.h> (C99 FP environment control) 297have_fenv = conf.CheckHeader('fenv.h', '<>') 298if not have_fenv: 299 print "Warning: Header file <fenv.h> not found." 300 print " This host has no IEEE FP rounding mode control." 301 302# Check for mysql. 303mysql_config = WhereIs('mysql_config') 304have_mysql = mysql_config != None 305 306# Check MySQL version. 307if have_mysql: 308 mysql_version = os.popen(mysql_config + ' --version').read() 309 min_mysql_version = '4.1' 310 if compare_versions(mysql_version, min_mysql_version) < 0: 311 print 'Warning: MySQL', min_mysql_version, 'or newer required.' 312 print ' Version', mysql_version, 'detected.' 313 have_mysql = False 314 315# Set up mysql_config commands. 316if have_mysql: 317 mysql_config_include = mysql_config + ' --include' 318 if os.system(mysql_config_include + ' > /dev/null') != 0: 319 # older mysql_config versions don't support --include, use 320 # --cflags instead 321 mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g' 322 # This seems to work in all versions 323 mysql_config_libs = mysql_config + ' --libs' 324 325env = conf.Finish() 326 327# Define the universe of supported ISAs 328env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips'] 329 330# Define the universe of supported CPU models 331env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU', 332 'O3CPU', 'OzoneCPU'] 333 334if os.path.isdir(joinpath(SRCDIR, 'src/encumbered/cpu/full')): 335 env['ALL_CPU_LIST'] += ['FullCPU'] 336 337# Sticky options get saved in the options file so they persist from 338# one invocation to the next (unless overridden, in which case the new 339# value becomes sticky). 340sticky_opts = Options(args=ARGUMENTS) 341sticky_opts.AddOptions( 342 EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']), 343 BoolOption('FULL_SYSTEM', 'Full-system support', False), 344 # There's a bug in scons 0.96.1 that causes ListOptions with list 345 # values (more than one value) not to be able to be restored from 346 # a saved option file. If this causes trouble then upgrade to 347 # scons 0.96.90 or later. 348 ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU,O3CPU', 349 env['ALL_CPU_LIST']), 350 BoolOption('ALPHA_TLASER', 351 'Model Alpha TurboLaser platform (vs. Tsunami)', False), 352 BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False), 353 BoolOption('EFENCE', 'Link with Electric Fence malloc debugger', 354 False), 355 BoolOption('SS_COMPATIBLE_FP', 356 'Make floating-point results compatible with SimpleScalar', 357 False), 358 BoolOption('USE_SSE2', 359 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts', 360 False), 361 BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql), 362 BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv), 363 BoolOption('USE_CHECKER', 'Use checker for detailed CPU models', False), 364 ('CC', 'C compiler', os.environ.get('CC', env['CC'])), 365 ('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])), 366 BoolOption('BATCH', 'Use batch pool for build and tests', False), 367 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'), 368 ('PYTHONHOME', 369 'Override the default PYTHONHOME for this system (use with caution)', 370 '%s:%s' % (sys.prefix, sys.exec_prefix)) 371 ) 372 373# Non-sticky options only apply to the current build. 374nonsticky_opts = Options(args=ARGUMENTS) 375nonsticky_opts.AddOptions( 376 BoolOption('update_ref', 'Update test reference outputs', False) 377 ) 378 379# These options get exported to #defines in config/*.hh (see src/SConscript). 380env.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \ 381 'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \ 382 'USE_CHECKER', 'PYTHONHOME', 'TARGET_ISA'] 383 384# Define a handy 'no-op' action 385def no_action(target, source, env): 386 return 0 387 388env.NoAction = Action(no_action, None) 389 390################################################### 391# 392# Define a SCons builder for configuration flag headers. 393# 394################################################### 395 396# This function generates a config header file that #defines the 397# option symbol to the current option setting (0 or 1). The source 398# operands are the name of the option and a Value node containing the 399# value of the option. 400def build_config_file(target, source, env): 401 (option, value) = [s.get_contents() for s in source] 402 f = file(str(target[0]), 'w') 403 print >> f, '#define', option, value 404 f.close() 405 return None 406 407# Generate the message to be printed when building the config file. 408def build_config_file_string(target, source, env): 409 (option, value) = [s.get_contents() for s in source] 410 return "Defining %s as %s in %s." % (option, value, target[0]) 411 412# Combine the two functions into a scons Action object. 413config_action = Action(build_config_file, build_config_file_string) 414 415# The emitter munges the source & target node lists to reflect what 416# we're really doing. 417def config_emitter(target, source, env): 418 # extract option name from Builder arg 419 option = str(target[0]) 420 # True target is config header file 421 target = joinpath('config', option.lower() + '.hh') 422 val = env[option] 423 if isinstance(val, bool): 424 # Force value to 0/1 425 val = int(val) 426 elif isinstance(val, str): 427 val = '"' + val + '"' 428 429 # Sources are option name & value (packaged in SCons Value nodes) 430 return ([target], [Value(option), Value(val)]) 431 432config_builder = Builder(emitter = config_emitter, action = config_action) 433 434env.Append(BUILDERS = { 'ConfigFile' : config_builder }) 435 436################################################### 437# 438# Define a SCons builder for copying files. This is used by the 439# Python zipfile code in src/python/SConscript, but is placed up here 440# since it's potentially more generally applicable. 441# 442################################################### 443 444copy_builder = Builder(action = Copy("$TARGET", "$SOURCE")) 445 446env.Append(BUILDERS = { 'CopyFile' : copy_builder }) 447 448################################################### 449# 450# Define a simple SCons builder to concatenate files. 451# 452# Used to append the Python zip archive to the executable. 453# 454################################################### 455 456concat_builder = Builder(action = Action(['cat $SOURCES > $TARGET', 457 'chmod +x $TARGET'])) 458 459env.Append(BUILDERS = { 'Concat' : concat_builder }) 460 461 462# base help text 463help_text = ''' 464Usage: scons [scons options] [build options] [target(s)] 465 466''' 467 468# libelf build is shared across all configs in the build root. 469env.SConscript('ext/libelf/SConscript', 470 build_dir = joinpath(build_root, 'libelf'), 471 exports = 'env') 472 473################################################### 474# 475# This function is used to set up a directory with switching headers 476# 477################################################### 478 479def make_switching_dir(dirname, switch_headers, env): 480 # Generate the header. target[0] is the full path of the output 481 # header to generate. 'source' is a dummy variable, since we get the 482 # list of ISAs from env['ALL_ISA_LIST']. 483 def gen_switch_hdr(target, source, env): 484 fname = str(target[0]) 485 basename = os.path.basename(fname) 486 f = open(fname, 'w') 487 f.write('#include "arch/isa_specific.hh"\n') 488 cond = '#if' 489 for isa in env['ALL_ISA_LIST']: 490 f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n' 491 % (cond, isa.upper(), dirname, isa, basename)) 492 cond = '#elif' 493 f.write('#else\n#error "THE_ISA not set"\n#endif\n') 494 f.close() 495 return 0 496 497 # String to print when generating header 498 def gen_switch_hdr_string(target, source, env): 499 return "Generating switch header " + str(target[0]) 500 501 # Build SCons Action object. 'varlist' specifies env vars that this 502 # action depends on; when env['ALL_ISA_LIST'] changes these actions 503 # should get re-executed. 504 switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string, 505 varlist=['ALL_ISA_LIST']) 506 507 # Instantiate actions for each header 508 for hdr in switch_headers: 509 env.Command(hdr, [], switch_hdr_action) 510 511env.make_switching_dir = make_switching_dir 512 513################################################### 514# 515# Define build environments for selected configurations. 516# 517################################################### 518 519# rename base env 520base_env = env 521 522for build_path in build_paths: 523 print "Building in", build_path 524 # build_dir is the tail component of build path, and is used to 525 # determine the build parameters (e.g., 'ALPHA_SE') 526 (build_root, build_dir) = os.path.split(build_path) 527 # Make a copy of the build-root environment to use for this config. 528 env = base_env.Copy() 529 530 # Set env options according to the build directory config. 531 sticky_opts.files = [] 532 # Options for $BUILD_ROOT/$BUILD_DIR are stored in 533 # $BUILD_ROOT/options/$BUILD_DIR so you can nuke 534 # $BUILD_ROOT/$BUILD_DIR without losing your options settings. 535 current_opts_file = joinpath(build_root, 'options', build_dir) 536 if os.path.isfile(current_opts_file): 537 sticky_opts.files.append(current_opts_file) 538 print "Using saved options file %s" % current_opts_file 539 else: 540 # Build dir-specific options file doesn't exist. 541 542 # Make sure the directory is there so we can create it later 543 opt_dir = os.path.dirname(current_opts_file) 544 if not os.path.isdir(opt_dir): 545 os.mkdir(opt_dir) 546 547 # Get default build options from source tree. Options are 548 # normally determined by name of $BUILD_DIR, but can be 549 # overriden by 'default=' arg on command line. 550 default_opts_file = joinpath('build_opts', 551 ARGUMENTS.get('default', build_dir)) 552 if os.path.isfile(default_opts_file): 553 sticky_opts.files.append(default_opts_file) 554 print "Options file %s not found,\n using defaults in %s" \ 555 % (current_opts_file, default_opts_file) 556 else: 557 print "Error: cannot find options file %s or %s" \ 558 % (current_opts_file, default_opts_file) 559 Exit(1) 560 561 # Apply current option settings to env 562 sticky_opts.Update(env) 563 nonsticky_opts.Update(env) 564 565 help_text += "Sticky options for %s:\n" % build_dir \ 566 + sticky_opts.GenerateHelpText(env) \ 567 + "\nNon-sticky options for %s:\n" % build_dir \ 568 + nonsticky_opts.GenerateHelpText(env) 569 570 # Process option settings. 571 572 if not have_fenv and env['USE_FENV']: 573 print "Warning: <fenv.h> not available; " \ 574 "forcing USE_FENV to False in", build_dir + "." 575 env['USE_FENV'] = False 576 577 if not env['USE_FENV']: 578 print "Warning: No IEEE FP rounding mode control in", build_dir + "." 579 print " FP results may deviate slightly from other platforms." 580 581 if env['EFENCE']: 582 env.Append(LIBS=['efence']) 583 584 if env['USE_MYSQL']: 585 if not have_mysql: 586 print "Warning: MySQL not available; " \ 587 "forcing USE_MYSQL to False in", build_dir + "." 588 env['USE_MYSQL'] = False 589 else: 590 print "Compiling in", build_dir, "with MySQL support." 591 env.ParseConfig(mysql_config_libs) 592 env.ParseConfig(mysql_config_include) 593 594 # Save sticky option settings back to current options file 595 sticky_opts.Save(current_opts_file, env) 596 597 # Do this after we save setting back, or else we'll tack on an 598 # extra 'qdo' every time we run scons. 599 if env['BATCH']: 600 env['CC'] = env['BATCH_CMD'] + ' ' + env['CC'] 601 env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX'] 602 603 if env['USE_SSE2']: 604 env.Append(CCFLAGS='-msse2') 605 606 # The src/SConscript file sets up the build rules in 'env' according 607 # to the configured options. It returns a list of environments, 608 # one for each variant build (debug, opt, etc.) 609 envList = SConscript('src/SConscript', build_dir = build_path, 610 exports = 'env') 611 612 # Set up the regression tests for each build. 613 for e in envList: 614 SConscript('tests/SConscript', 615 build_dir = joinpath(build_path, 'tests', e.Label), 616 exports = { 'env' : e }, duplicate = False) 617 618Help(help_text) 619 620 621################################################### 622# 623# Let SCons do its thing. At this point SCons will use the defined 624# build environments to build the requested targets. 625# 626################################################### 627 628