SConstruct (3717:d4eacb8998d2) SConstruct (3718:9d40568cfaeb)
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# Path to the M5 source tree.
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
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# Path to the M5 source tree.
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
109# helper function: find last occurrence of element in list
110def rfind(l, elt, offs = -1):
111 for i in range(len(l)+offs, 0, -1):
112 if l[i] == elt:
113 return i
114 raise ValueError, "element not found"
115
116# helper function: compare dotted version numbers.
117# E.g., compare_version('1.3.25', '1.4.1')
118# returns -1, 0, 1 if v1 is <, ==, > v2
119def compare_versions(v1, v2):
120 # Convert dotted strings to lists
121 v1 = map(int, v1.split('.'))
122 v2 = map(int, v2.split('.'))
123 # Compare corresponding elements of lists
124 for n1,n2 in zip(v1, v2):
125 if n1 < n2: return -1
126 if n1 > n2: return 1
127 # all corresponding values are equal... see if one has extra values
128 if len(v1) < len(v2): return -1
129 if len(v1) > len(v2): return 1
130 return 0
131
132# Each target must have 'build' in the interior of the path; the
133# directory below this will determine the build parameters. For
134# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
135# recognize that ALPHA_SE specifies the configuration because it
136# follow 'build' in the bulid path.
137
138# Generate absolute paths to targets so we can see where the build dir is
139if COMMAND_LINE_TARGETS:
140 # Ask SCons which directory it was invoked from
141 launch_dir = GetLaunchDir()
142 # Make targets relative to invocation directory
143 abs_targets = map(lambda x: os.path.normpath(joinpath(launch_dir, str(x))),
144 COMMAND_LINE_TARGETS)
145else:
146 # Default targets are relative to root of tree
147 abs_targets = map(lambda x: os.path.normpath(joinpath(ROOT, str(x))),
148 DEFAULT_TARGETS)
149
150
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, '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
151# Generate a list of the unique build roots and configs that the
152# collected targets reference.
153build_paths = []
154build_root = None
155for t in abs_targets:
156 path_dirs = t.split('/')
157 try:
158 build_top = rfind(path_dirs, 'build', -2)
159 except:
160 print "Error: no non-leaf 'build' dir found on target path", t
161 Exit(1)
162 this_build_root = joinpath('/',*path_dirs[:build_top+1])
163 if not build_root:
164 build_root = this_build_root
165 else:
166 if this_build_root != build_root:
167 print "Error: build targets not under same build root\n"\
168 " %s\n %s" % (build_root, this_build_root)
169 Exit(1)
170 build_path = joinpath('/',*path_dirs[:build_top+2])
171 if build_path not in build_paths:
172 build_paths.append(build_path)
173
174###################################################
175#
176# Set up the default build environment. This environment is copied
177# and modified according to each selected configuration.
178#
179###################################################
180
181env = Environment(ENV = os.environ, # inherit user's environment vars
182 ROOT = ROOT,
183 SRCDIR = SRCDIR)
184
185#Parse CC/CXX early so that we use the correct compiler for
186# to test for dependencies/versions/libraries/includes
187if ARGUMENTS.get('CC', None):
188 env['CC'] = ARGUMENTS.get('CC')
189
190if ARGUMENTS.get('CXX', None):
191 env['CXX'] = ARGUMENTS.get('CXX')
192
193env.SConsignFile(joinpath(build_root,"sconsign"))
194
195# Default duplicate option is to use hard links, but this messes up
196# when you use emacs to edit a file in the target dir, as emacs moves
197# file to file~ then copies to file, breaking the link. Symbolic
198# (soft) links work better.
199env.SetOption('duplicate', 'soft-copy')
200
201# I waffle on this setting... it does avoid a few painful but
202# unnecessary builds, but it also seems to make trivial builds take
203# noticeably longer.
204if False:
205 env.TargetSignatures('content')
206
207# M5_PLY is used by isa_parser.py to find the PLY package.
208env.Append(ENV = { 'M5_PLY' : Dir('ext/ply') })
209
210# Set up default C++ compiler flags
211env.Append(CCFLAGS='-pipe')
212env.Append(CCFLAGS='-fno-strict-aliasing')
213env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
214if sys.platform == 'cygwin':
215 # cygwin has some header file issues...
216 env.Append(CCFLAGS=Split("-Wno-uninitialized"))
217env.Append(CPPPATH=[Dir('ext/dnet')])
218
219# Check for SWIG
220if not env.has_key('SWIG'):
221 print 'Error: SWIG utility not found.'
222 print ' Please install (see http://www.swig.org) and retry.'
223 Exit(1)
224
225# Check for appropriate SWIG version
226swig_version = os.popen('swig -version').read().split()
227# First 3 words should be "SWIG Version x.y.z"
228if swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
229 print 'Error determining SWIG version.'
230 Exit(1)
231
232min_swig_version = '1.3.28'
233if compare_versions(swig_version[2], min_swig_version) < 0:
234 print 'Error: SWIG version', min_swig_version, 'or newer required.'
235 print ' Installed version:', swig_version[2]
236 Exit(1)
237
238# Set up SWIG flags & scanner
239env.Append(SWIGFLAGS=Split('-c++ -python -modern $_CPPINCFLAGS'))
240
241import SCons.Scanner
242
243swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
244
245swig_scanner = SCons.Scanner.ClassicCPP("SwigScan", ".i", "CPPPATH",
246 swig_inc_re)
247
248env.Append(SCANNERS = swig_scanner)
249
250# Platform-specific configuration. Note again that we assume that all
251# builds under a given build root run on the same host platform.
252conf = Configure(env,
253 conf_dir = joinpath(build_root, '.scons_config'),
254 log_file = joinpath(build_root, 'scons_config.log'))
255
256# Find Python include and library directories for embedding the
257# interpreter. For consistency, we will use the same Python
258# installation used to run scons (and thus this script). If you want
259# to link in an alternate version, see above for instructions on how
260# to invoke scons with a different copy of the Python interpreter.
261
262# Get brief Python version name (e.g., "python2.4") for locating
263# include & library files
264py_version_name = 'python' + sys.version[:3]
265
266# include path, e.g. /usr/local/include/python2.4
267py_header_path = joinpath(sys.exec_prefix, 'include', py_version_name)
268env.Append(CPPPATH = py_header_path)
269# verify that it works
270if not conf.CheckHeader('Python.h', '<>'):
271 print "Error: can't find Python.h header in", py_header_path
272 Exit(1)
273
274# add library path too if it's not in the default place
275py_lib_path = None
276if sys.exec_prefix != '/usr':
277 py_lib_path = joinpath(sys.exec_prefix, 'lib')
278elif sys.platform == 'cygwin':
279 # cygwin puts the .dll in /bin for some reason
280 py_lib_path = '/bin'
281if py_lib_path:
282 env.Append(LIBPATH = py_lib_path)
283 print 'Adding', py_lib_path, 'to LIBPATH for', py_version_name
284if not conf.CheckLib(py_version_name):
285 print "Error: can't find Python library", py_version_name
286 Exit(1)
287
288# On Solaris you need to use libsocket for socket ops
289if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
290 if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
291 print "Can't find library with socket calls (e.g. accept())"
292 Exit(1)
293
294# Check for zlib. If the check passes, libz will be automatically
295# added to the LIBS environment variable.
296if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++'):
297 print 'Error: did not find needed zlib compression library '\
298 'and/or zlib.h header file.'
299 print ' Please install zlib and try again.'
300 Exit(1)
301
302# Check for <fenv.h> (C99 FP environment control)
303have_fenv = conf.CheckHeader('fenv.h', '<>')
304if not have_fenv:
305 print "Warning: Header file <fenv.h> not found."
306 print " This host has no IEEE FP rounding mode control."
307
308# Check for mysql.
309mysql_config = WhereIs('mysql_config')
310have_mysql = mysql_config != None
311
312# Check MySQL version.
313if have_mysql:
314 mysql_version = os.popen(mysql_config + ' --version').read()
315 min_mysql_version = '4.1'
316 if compare_versions(mysql_version, min_mysql_version) < 0:
317 print 'Warning: MySQL', min_mysql_version, 'or newer required.'
318 print ' Version', mysql_version, 'detected.'
319 have_mysql = False
320
321# Set up mysql_config commands.
322if have_mysql:
323 mysql_config_include = mysql_config + ' --include'
324 if os.system(mysql_config_include + ' > /dev/null') != 0:
325 # older mysql_config versions don't support --include, use
326 # --cflags instead
327 mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
328 # This seems to work in all versions
329 mysql_config_libs = mysql_config + ' --libs'
330
331env = conf.Finish()
332
333# Define the universe of supported ISAs
334env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']
335
336# Define the universe of supported CPU models
337env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU',
338 'O3CPU', 'OzoneCPU']
339
340if os.path.isdir(joinpath(SRCDIR, 'encumbered/cpu/full')):
341 env['ALL_CPU_LIST'] += ['FullCPU']
342
343# Sticky options get saved in the options file so they persist from
344# one invocation to the next (unless overridden, in which case the new
345# value becomes sticky).
346sticky_opts = Options(args=ARGUMENTS)
347sticky_opts.AddOptions(
348 EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']),
349 BoolOption('FULL_SYSTEM', 'Full-system support', False),
350 # There's a bug in scons 0.96.1 that causes ListOptions with list
351 # values (more than one value) not to be able to be restored from
352 # a saved option file. If this causes trouble then upgrade to
353 # scons 0.96.90 or later.
354 ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU,O3CPU',
355 env['ALL_CPU_LIST']),
356 BoolOption('ALPHA_TLASER',
357 'Model Alpha TurboLaser platform (vs. Tsunami)', False),
358 BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
359 BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
360 False),
361 BoolOption('SS_COMPATIBLE_FP',
362 'Make floating-point results compatible with SimpleScalar',
363 False),
364 BoolOption('USE_SSE2',
365 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
366 False),
367 BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
368 BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
369 BoolOption('USE_CHECKER', 'Use checker for detailed CPU models', False),
370 ('CC', 'C compiler', os.environ.get('CC', env['CC'])),
371 ('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])),
372 BoolOption('BATCH', 'Use batch pool for build and tests', False),
373 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
374 ('PYTHONHOME',
375 'Override the default PYTHONHOME for this system (use with caution)',
376 '%s:%s' % (sys.prefix, sys.exec_prefix))
377 )
378
379# Non-sticky options only apply to the current build.
380nonsticky_opts = Options(args=ARGUMENTS)
381nonsticky_opts.AddOptions(
382 BoolOption('update_ref', 'Update test reference outputs', False)
383 )
384
385# These options get exported to #defines in config/*.hh (see src/SConscript).
386env.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \
387 'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \
388 'USE_CHECKER', 'PYTHONHOME', 'TARGET_ISA']
389
390# Define a handy 'no-op' action
391def no_action(target, source, env):
392 return 0
393
394env.NoAction = Action(no_action, None)
395
396###################################################
397#
398# Define a SCons builder for configuration flag headers.
399#
400###################################################
401
402# This function generates a config header file that #defines the
403# option symbol to the current option setting (0 or 1). The source
404# operands are the name of the option and a Value node containing the
405# value of the option.
406def build_config_file(target, source, env):
407 (option, value) = [s.get_contents() for s in source]
408 f = file(str(target[0]), 'w')
409 print >> f, '#define', option, value
410 f.close()
411 return None
412
413# Generate the message to be printed when building the config file.
414def build_config_file_string(target, source, env):
415 (option, value) = [s.get_contents() for s in source]
416 return "Defining %s as %s in %s." % (option, value, target[0])
417
418# Combine the two functions into a scons Action object.
419config_action = Action(build_config_file, build_config_file_string)
420
421# The emitter munges the source & target node lists to reflect what
422# we're really doing.
423def config_emitter(target, source, env):
424 # extract option name from Builder arg
425 option = str(target[0])
426 # True target is config header file
427 target = joinpath('config', option.lower() + '.hh')
428 val = env[option]
429 if isinstance(val, bool):
430 # Force value to 0/1
431 val = int(val)
432 elif isinstance(val, str):
433 val = '"' + val + '"'
434
435 # Sources are option name & value (packaged in SCons Value nodes)
436 return ([target], [Value(option), Value(val)])
437
438config_builder = Builder(emitter = config_emitter, action = config_action)
439
440env.Append(BUILDERS = { 'ConfigFile' : config_builder })
441
442###################################################
443#
444# Define a SCons builder for copying files. This is used by the
445# Python zipfile code in src/python/SConscript, but is placed up here
446# since it's potentially more generally applicable.
447#
448###################################################
449
450copy_builder = Builder(action = Copy("$TARGET", "$SOURCE"))
451
452env.Append(BUILDERS = { 'CopyFile' : copy_builder })
453
454###################################################
455#
456# Define a simple SCons builder to concatenate files.
457#
458# Used to append the Python zip archive to the executable.
459#
460###################################################
461
462concat_builder = Builder(action = Action(['cat $SOURCES > $TARGET',
463 'chmod +x $TARGET']))
464
465env.Append(BUILDERS = { 'Concat' : concat_builder })
466
467
468# base help text
469help_text = '''
470Usage: scons [scons options] [build options] [target(s)]
471
472'''
473
474# libelf build is shared across all configs in the build root.
475env.SConscript('ext/libelf/SConscript',
476 build_dir = joinpath(build_root, 'libelf'),
477 exports = 'env')
478
479###################################################
480#
481# This function is used to set up a directory with switching headers
482#
483###################################################
484
485def make_switching_dir(dirname, switch_headers, env):
486 # Generate the header. target[0] is the full path of the output
487 # header to generate. 'source' is a dummy variable, since we get the
488 # list of ISAs from env['ALL_ISA_LIST'].
489 def gen_switch_hdr(target, source, env):
490 fname = str(target[0])
491 basename = os.path.basename(fname)
492 f = open(fname, 'w')
493 f.write('#include "arch/isa_specific.hh"\n')
494 cond = '#if'
495 for isa in env['ALL_ISA_LIST']:
496 f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n'
497 % (cond, isa.upper(), dirname, isa, basename))
498 cond = '#elif'
499 f.write('#else\n#error "THE_ISA not set"\n#endif\n')
500 f.close()
501 return 0
502
503 # String to print when generating header
504 def gen_switch_hdr_string(target, source, env):
505 return "Generating switch header " + str(target[0])
506
507 # Build SCons Action object. 'varlist' specifies env vars that this
508 # action depends on; when env['ALL_ISA_LIST'] changes these actions
509 # should get re-executed.
510 switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string,
511 varlist=['ALL_ISA_LIST'])
512
513 # Instantiate actions for each header
514 for hdr in switch_headers:
515 env.Command(hdr, [], switch_hdr_action)
516
517env.make_switching_dir = make_switching_dir
518
519###################################################
520#
521# Define build environments for selected configurations.
522#
523###################################################
524
525# rename base env
526base_env = env
527
528for build_path in build_paths:
529 print "Building in", build_path
530 # build_dir is the tail component of build path, and is used to
531 # determine the build parameters (e.g., 'ALPHA_SE')
532 (build_root, build_dir) = os.path.split(build_path)
533 # Make a copy of the build-root environment to use for this config.
534 env = base_env.Copy()
535
536 # Set env options according to the build directory config.
537 sticky_opts.files = []
538 # Options for $BUILD_ROOT/$BUILD_DIR are stored in
539 # $BUILD_ROOT/options/$BUILD_DIR so you can nuke
540 # $BUILD_ROOT/$BUILD_DIR without losing your options settings.
541 current_opts_file = joinpath(build_root, 'options', build_dir)
542 if os.path.isfile(current_opts_file):
543 sticky_opts.files.append(current_opts_file)
544 print "Using saved options file %s" % current_opts_file
545 else:
546 # Build dir-specific options file doesn't exist.
547
548 # Make sure the directory is there so we can create it later
549 opt_dir = os.path.dirname(current_opts_file)
550 if not os.path.isdir(opt_dir):
551 os.mkdir(opt_dir)
552
553 # Get default build options from source tree. Options are
554 # normally determined by name of $BUILD_DIR, but can be
555 # overriden by 'default=' arg on command line.
556 default_opts_file = joinpath('build_opts',
557 ARGUMENTS.get('default', build_dir))
558 if os.path.isfile(default_opts_file):
559 sticky_opts.files.append(default_opts_file)
560 print "Options file %s not found,\n using defaults in %s" \
561 % (current_opts_file, default_opts_file)
562 else:
563 print "Error: cannot find options file %s or %s" \
564 % (current_opts_file, default_opts_file)
565 Exit(1)
566
567 # Apply current option settings to env
568 sticky_opts.Update(env)
569 nonsticky_opts.Update(env)
570
571 help_text += "Sticky options for %s:\n" % build_dir \
572 + sticky_opts.GenerateHelpText(env) \
573 + "\nNon-sticky options for %s:\n" % build_dir \
574 + nonsticky_opts.GenerateHelpText(env)
575
576 # Process option settings.
577
578 if not have_fenv and env['USE_FENV']:
579 print "Warning: <fenv.h> not available; " \
580 "forcing USE_FENV to False in", build_dir + "."
581 env['USE_FENV'] = False
582
583 if not env['USE_FENV']:
584 print "Warning: No IEEE FP rounding mode control in", build_dir + "."
585 print " FP results may deviate slightly from other platforms."
586
587 if env['EFENCE']:
588 env.Append(LIBS=['efence'])
589
590 if env['USE_MYSQL']:
591 if not have_mysql:
592 print "Warning: MySQL not available; " \
593 "forcing USE_MYSQL to False in", build_dir + "."
594 env['USE_MYSQL'] = False
595 else:
596 print "Compiling in", build_dir, "with MySQL support."
597 env.ParseConfig(mysql_config_libs)
598 env.ParseConfig(mysql_config_include)
599
600 # Save sticky option settings back to current options file
601 sticky_opts.Save(current_opts_file, env)
602
603 # Do this after we save setting back, or else we'll tack on an
604 # extra 'qdo' every time we run scons.
605 if env['BATCH']:
606 env['CC'] = env['BATCH_CMD'] + ' ' + env['CC']
607 env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX']
608
609 if env['USE_SSE2']:
610 env.Append(CCFLAGS='-msse2')
611
612 # The src/SConscript file sets up the build rules in 'env' according
613 # to the configured options. It returns a list of environments,
614 # one for each variant build (debug, opt, etc.)
615 envList = SConscript('src/SConscript', build_dir = build_path,
616 exports = 'env')
617
618 # Set up the regression tests for each build.
619 for e in envList:
620 SConscript('tests/SConscript',
621 build_dir = joinpath(build_path, 'tests', e.Label),
622 exports = { 'env' : e }, duplicate = False)
623
624Help(help_text)
625
626
627###################################################
628#
629# Let SCons do its thing. At this point SCons will use the defined
630# build environments to build the requested targets.
631#
632###################################################
633