summaryrefslogtreecommitdiff
path: root/SConstruct
blob: cbbcb07a699108172e0c971530e1626eb27caf5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
# -*- mode:python -*-

# Copyright (c) 2004-2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

###################################################
#
# SCons top-level build description (SConstruct) file.
#
# While in this directory ('m5'), just type 'scons' to build the default
# configuration (see below), or type 'scons build/<CONFIG>/<binary>'
# to build some other configuration (e.g., 'build/ALPHA_FS/m5.opt' for
# the optimized full-system version).
#
# You can build M5 in a different directory as long as there is a
# 'build/<CONFIG>' somewhere along the target path.  The build system
# expdects that all configs under the same build directory are being
# built for the same host system.
#
# Examples:
#   These two commands are equivalent.  The '-u' option tells scons to
#   search up the directory tree for this SConstruct file.
#   % cd <path-to-src>/m5 ; scons build/ALPHA_FS/m5.debug
#   % cd <path-to-src>/m5/build/ALPHA_FS; scons -u m5.debug
#   These two commands are equivalent and demonstrate building in a
#   directory outside of the source tree.  The '-C' option tells scons
#   to chdir to the specified directory to find this SConstruct file.
#   % cd <path-to-src>/m5 ; scons /local/foo/build/ALPHA_FS/m5.debug
#   % cd /local/foo/build/ALPHA_FS; scons -C <path-to-src>/m5 m5.debug
#
# You can use 'scons -H' to print scons options.  If you're in this
# 'm5' directory (or use -u or -C to tell scons where to find this
# file), you can use 'scons -h' to print all the M5-specific build
# options as well.
#
###################################################

# Python library imports
import sys
import os

# Check for recent-enough Python and SCons versions
EnsurePythonVersion(2,3)

# Ironically, SCons 0.96 dies if you give EnsureSconsVersion a
# 3-element version number.
min_scons_version = (0,96,91)
try:
    EnsureSConsVersion(*min_scons_version)
except:
    print "Error checking current SCons version."
    print "SCons", ".".join(map(str,min_scons_version)), "or greater required."
    Exit(2)
    

# The absolute path to the current directory (where this file lives).
ROOT = Dir('.').abspath

# Paths to the M5 and external source trees.
SRCDIR = os.path.join(ROOT, 'src')

# tell python where to find m5 python code
sys.path.append(os.path.join(ROOT, 'src/python'))

###################################################
#
# Figure out which configurations to set up based on the path(s) of
# the target(s).
#
###################################################

# Find default configuration & binary.
Default(os.environ.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug'))

# Ask SCons which directory it was invoked from.
launch_dir = GetLaunchDir()

# Make targets relative to invocation directory
abs_targets = map(lambda x: os.path.normpath(os.path.join(launch_dir, str(x))),
                  BUILD_TARGETS)

# helper function: find last occurrence of element in list
def rfind(l, elt, offs = -1):
    for i in range(len(l)+offs, 0, -1):
        if l[i] == elt:
            return i
    raise ValueError, "element not found"

# Each target must have 'build' in the interior of the path; the
# directory below this will determine the build parameters.  For
# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
# recognize that ALPHA_SE specifies the configuration because it
# follow 'build' in the bulid path.

# Generate a list of the unique build roots and configs that the
# collected targets reference.
build_paths = []
build_root = None
for t in abs_targets:
    path_dirs = t.split('/')
    try:
        build_top = rfind(path_dirs, 'build', -2)
    except:
        print "Error: no non-leaf 'build' dir found on target path", t
        Exit(1)
    this_build_root = os.path.join('/',*path_dirs[:build_top+1])
    if not build_root:
        build_root = this_build_root
    else:
        if this_build_root != build_root:
            print "Error: build targets not under same build root\n"\
                  "  %s\n  %s" % (build_root, this_build_root)
            Exit(1)
    build_path = os.path.join('/',*path_dirs[:build_top+2])
    if build_path not in build_paths:
        build_paths.append(build_path)

###################################################
#
# Set up the default build environment.  This environment is copied
# and modified according to each selected configuration.
#
###################################################

env = Environment(ENV = os.environ,  # inherit user's environment vars
                  ROOT = ROOT,
                  SRCDIR = SRCDIR)

env.SConsignFile("sconsign")

# I waffle on this setting... it does avoid a few painful but
# unnecessary builds, but it also seems to make trivial builds take
# noticeably longer.
if False:
    env.TargetSignatures('content')

# M5_PLY is used by isa_parser.py to find the PLY package.
env.Append(ENV = { 'M5_PLY' : Dir('ext/ply') })

# Set up default C++ compiler flags
env.Append(CCFLAGS='-pipe')
env.Append(CCFLAGS='-fno-strict-aliasing')
env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
if sys.platform == 'cygwin':
    # cygwin has some header file issues...
    env.Append(CCFLAGS=Split("-Wno-uninitialized"))
env.Append(CPPPATH=[Dir('ext/dnet')])

# Default libraries
env.Append(LIBS=['z'])

# Platform-specific configuration.  Note again that we assume that all
# builds under a given build root run on the same host platform.
conf = Configure(env,
                 conf_dir = os.path.join(build_root, '.scons_config'),
                 log_file = os.path.join(build_root, 'scons_config.log'))

# Check for <fenv.h> (C99 FP environment control)
have_fenv = conf.CheckHeader('fenv.h', '<>')
if not have_fenv:
    print "Warning: Header file <fenv.h> not found."
    print "         This host has no IEEE FP rounding mode control."

# Check for mysql.
mysql_config = WhereIs('mysql_config')
have_mysql = mysql_config != None

# Check MySQL version.
if have_mysql:
    mysql_version = os.popen(mysql_config + ' --version').read()
    mysql_version = mysql_version.split('.')
    mysql_major = int(mysql_version[0])
    mysql_minor = int(mysql_version[1])
    # This version check is probably overly conservative, but it deals
    # with the versions we have installed.
    if mysql_major < 4 or (mysql_major == 4 and mysql_minor < 1):
        print "Warning: MySQL v4.1 or newer required."
        have_mysql = False

# Set up mysql_config commands.
if have_mysql:
    mysql_config_include = mysql_config + ' --include'
    if os.system(mysql_config_include + ' > /dev/null') != 0:
        # older mysql_config versions don't support --include, use
        # --cflags instead
        mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
    # This seems to work in all versions
    mysql_config_libs = mysql_config + ' --libs'

env = conf.Finish()

# Define the universe of supported ISAs
env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']

# Define the universe of supported CPU models
env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU',
                       'FullCPU', 'AlphaFullCPU']

# Sticky options get saved in the options file so they persist from
# one invocation to the next (unless overridden, in which case the new
# value becomes sticky).
sticky_opts = Options(args=ARGUMENTS)
sticky_opts.AddOptions(
    EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']),
    BoolOption('FULL_SYSTEM', 'Full-system support', False),
    # There's a bug in scons 0.96.1 that causes ListOptions with list
    # values (more than one value) not to be able to be restored from
    # a saved option file.  If this causes trouble then upgrade to
    # scons 0.96.90 or later.
    ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU',
               env['ALL_CPU_LIST']),
    BoolOption('ALPHA_TLASER',
               'Model Alpha TurboLaser platform (vs. Tsunami)', False),
    BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
    BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
               False),
    BoolOption('SS_COMPATIBLE_FP',
               'Make floating-point results compatible with SimpleScalar',
               False),
    BoolOption('USE_SSE2',
               'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
               False),
    BoolOption('STATS_BINNING', 'Bin statistics by CPU mode', have_mysql),
    BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
    BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
    ('CC', 'C compiler', os.environ.get('CC', env['CC'])),
    ('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])),
    BoolOption('BATCH', 'Use batch pool for build and tests', False),
    ('BATCH_CMD', 'Batch pool submission command name', 'qdo')
    )

# Non-sticky options only apply to the current build.
nonsticky_opts = Options(args=ARGUMENTS)
nonsticky_opts.AddOptions(
    BoolOption('update_ref', 'Update test reference outputs', False)
    )

# These options get exported to #defines in config/*.hh (see m5/SConscript).
env.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \
                     'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \
                     'STATS_BINNING']

# Define a handy 'no-op' action
def no_action(target, source, env):
    return 0

env.NoAction = Action(no_action, None)

###################################################
#
# Define a SCons builder for configuration flag headers.
#
###################################################

# This function generates a config header file that #defines the
# option symbol to the current option setting (0 or 1).  The source
# operands are the name of the option and a Value node containing the
# value of the option.
def build_config_file(target, source, env):
    (option, value) = [s.get_contents() for s in source]
    f = file(str(target[0]), 'w')
    print >> f, '#define', option, value
    f.close()
    return None

# Generate the message to be printed when building the config file.
def build_config_file_string(target, source, env):
    (option, value) = [s.get_contents() for s in source]
    return "Defining %s as %s in %s." % (option, value, target[0])

# Combine the two functions into a scons Action object.
config_action = Action(build_config_file, build_config_file_string)

# The emitter munges the source & target node lists to reflect what
# we're really doing.
def config_emitter(target, source, env):
    # extract option name from Builder arg
    option = str(target[0])
    # True target is config header file
    target = os.path.join('config', option.lower() + '.hh')
    # Force value to 0/1 even if it's a Python bool
    val = int(eval(str(env[option])))
    # Sources are option name & value (packaged in SCons Value nodes)
    return ([target], [Value(option), Value(val)])

config_builder = Builder(emitter = config_emitter, action = config_action)

env.Append(BUILDERS = { 'ConfigFile' : config_builder })

# base help text
help_text = '''
Usage: scons [scons options] [build options] [target(s)]

'''

# libelf build is shared across all configs in the build root.
env.SConscript('ext/libelf/SConscript',
               build_dir = os.path.join(build_root, 'libelf'),
               exports = 'env')

###################################################
#
# Define build environments for selected configurations.
#
###################################################

# rename base env
base_env = env

for build_path in build_paths:
    print "Building in", build_path
    # build_dir is the tail component of build path, and is used to
    # determine the build parameters (e.g., 'ALPHA_SE')
    (build_root, build_dir) = os.path.split(build_path)
    # Make a copy of the build-root environment to use for this config.
    env = base_env.Copy()

    # Set env options according to the build directory config.
    sticky_opts.files = []
    # Options for $BUILD_ROOT/$BUILD_DIR are stored in
    # $BUILD_ROOT/options/$BUILD_DIR so you can nuke
    # $BUILD_ROOT/$BUILD_DIR without losing your options settings.
    current_opts_file = os.path.join(build_root, 'options', build_dir)
    if os.path.isfile(current_opts_file):
        sticky_opts.files.append(current_opts_file)
        print "Using saved options file %s" % current_opts_file
    else:
        # Build dir-specific options file doesn't exist.

        # Make sure the directory is there so we can create it later
        opt_dir = os.path.dirname(current_opts_file)
        if not os.path.isdir(opt_dir):
            os.mkdir(opt_dir)

        # Get default build options from source tree.  Options are
        # normally determined by name of $BUILD_DIR, but can be
        # overriden by 'default=' arg on command line.
        default_opts_file = os.path.join('build_opts',
                                         ARGUMENTS.get('default', build_dir))
        if os.path.isfile(default_opts_file):
            sticky_opts.files.append(default_opts_file)
            print "Options file %s not found,\n  using defaults in %s" \
                  % (current_opts_file, default_opts_file)
        else:
            print "Error: cannot find options file %s or %s" \
                  % (current_opts_file, default_opts_file)
            Exit(1)

    # Apply current option settings to env
    sticky_opts.Update(env)
    nonsticky_opts.Update(env)

    help_text += "Sticky options for %s:\n" % build_dir \
                 + sticky_opts.GenerateHelpText(env) \
                 + "\nNon-sticky options for %s:\n" % build_dir \
                 + nonsticky_opts.GenerateHelpText(env)

    # Process option settings.

    if not have_fenv and env['USE_FENV']:
        print "Warning: <fenv.h> not available; " \
              "forcing USE_FENV to False in", build_dir + "."
        env['USE_FENV'] = False

    if not env['USE_FENV']:
        print "Warning: No IEEE FP rounding mode control in", build_dir + "."
        print "         FP results may deviate slightly from other platforms."

    if env['EFENCE']:
        env.Append(LIBS=['efence'])

    if env['USE_MYSQL']:
        if not have_mysql:
            print "Warning: MySQL not available; " \
                  "forcing USE_MYSQL to False in", build_dir + "."
            env['USE_MYSQL'] = False
        else:
            print "Compiling in", build_dir, "with MySQL support."
            env.ParseConfig(mysql_config_libs)
            env.ParseConfig(mysql_config_include)

    # Save sticky option settings back to current options file
    sticky_opts.Save(current_opts_file, env)

    # Do this after we save setting back, or else we'll tack on an
    # extra 'qdo' every time we run scons.
    if env['BATCH']:
        env['CC']  = env['BATCH_CMD'] + ' ' + env['CC']
        env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX']

    if env['USE_SSE2']:
        env.Append(CCFLAGS='-msse2')

    # The m5/SConscript file sets up the build rules in 'env' according
    # to the configured options.  It returns a list of environments,
    # one for each variant build (debug, opt, etc.)
    envList = SConscript('src/SConscript', build_dir = build_path,
                         exports = 'env', duplicate = False)

    # Set up the regression tests for each build.
#    for e in envList:
#        SConscript('m5-test/SConscript',
#                   build_dir = os.path.join(build_dir, 'test', e.Label),
#                   exports = { 'env' : e }, duplicate = False)

Help(help_text)

###################################################
#
# Let SCons do its thing.  At this point SCons will use the defined
# build environments to build the requested targets.
#
###################################################