3 # Copyright (c) 2004-2005 The Regents of The University of Michigan
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.
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.
29 # Authors: Steve Reinhardt
31 ###################################################
33 # SCons top-level build description (SConstruct) file.
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).
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.
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
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
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
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
64 ###################################################
66 # Python library imports
70 # Check for recent-enough Python and SCons versions. If your system's
71 # default installation of Python is not recent enough, you can use a
72 # non-default installation of the Python interpreter by either (1)
73 # rearranging your PATH so that scons finds the non-default 'python'
74 # first or (2) explicitly invoking an alternative interpreter on the
75 # scons script, e.g., "/usr/local/bin/python2.4 `which scons` [args]".
76 EnsurePythonVersion(2,4)
78 # Ironically, SCons 0.96 dies if you give EnsureSconsVersion a
79 # 3-element version number.
80 min_scons_version
= (0,96,91)
82 EnsureSConsVersion(*min_scons_version
)
84 print "Error checking current SCons version."
85 print "SCons", ".".join(map(str,min_scons_version
)), "or greater required."
89 # The absolute path to the current directory (where this file lives).
90 ROOT
= Dir('.').abspath
92 # Paths to the M5 and external source trees.
93 SRCDIR
= os
.path
.join(ROOT
, 'src')
95 # tell python where to find m5 python code
96 sys
.path
.append(os
.path
.join(ROOT
, 'src/python'))
98 ###################################################
100 # Figure out which configurations to set up based on the path(s) of
103 ###################################################
105 # Find default configuration & binary.
106 Default(os
.environ
.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug'))
108 # Ask SCons which directory it was invoked from.
109 launch_dir
= GetLaunchDir()
111 # Make targets relative to invocation directory
112 abs_targets
= map(lambda x
: os
.path
.normpath(os
.path
.join(launch_dir
, str(x
))),
115 # helper function: find last occurrence of element in list
116 def rfind(l
, elt
, offs
= -1):
117 for i
in range(len(l
)+offs
, 0, -1):
120 raise ValueError, "element not found"
122 # helper function: compare dotted version numbers.
123 # E.g., compare_version('1.3.25', '1.4.1')
124 # returns -1, 0, 1 if v1 is <, ==, > v2
125 def compare_versions(v1
, v2
):
126 # Convert dotted strings to lists
127 v1
= map(int, v1
.split('.'))
128 v2
= map(int, v2
.split('.'))
129 # Compare corresponding elements of lists
130 for n1
,n2
in zip(v1
, v2
):
131 if n1
< n2
: return -1
133 # all corresponding values are equal... see if one has extra values
134 if len(v1
) < len(v2
): return -1
135 if len(v1
) > len(v2
): return 1
138 # Each target must have 'build' in the interior of the path; the
139 # directory below this will determine the build parameters. For
140 # example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
141 # recognize that ALPHA_SE specifies the configuration because it
142 # follow 'build' in the bulid path.
144 # Generate a list of the unique build roots and configs that the
145 # collected targets reference.
148 for t
in abs_targets
:
149 path_dirs
= t
.split('/')
151 build_top
= rfind(path_dirs
, 'build', -2)
153 print "Error: no non-leaf 'build' dir found on target path", t
155 this_build_root
= os
.path
.join('/',*path_dirs
[:build_top
+1])
157 build_root
= this_build_root
159 if this_build_root
!= build_root
:
160 print "Error: build targets not under same build root\n"\
161 " %s\n %s" % (build_root
, this_build_root
)
163 build_path
= os
.path
.join('/',*path_dirs
[:build_top
+2])
164 if build_path
not in build_paths
:
165 build_paths
.append(build_path
)
167 ###################################################
169 # Set up the default build environment. This environment is copied
170 # and modified according to each selected configuration.
172 ###################################################
174 env
= Environment(ENV
= os
.environ
, # inherit user's environment vars
178 env
.SConsignFile(os
.path
.join(build_root
,"sconsign"))
180 # Default duplicate option is to use hard links, but this messes up
181 # when you use emacs to edit a file in the target dir, as emacs moves
182 # file to file~ then copies to file, breaking the link. Symbolic
183 # (soft) links work better.
184 env
.SetOption('duplicate', 'soft-copy')
186 # I waffle on this setting... it does avoid a few painful but
187 # unnecessary builds, but it also seems to make trivial builds take
190 env
.TargetSignatures('content')
192 # M5_PLY is used by isa_parser.py to find the PLY package.
193 env
.Append(ENV
= { 'M5_PLY' : Dir('ext/ply') })
195 # Set up default C++ compiler flags
196 env
.Append(CCFLAGS
='-pipe')
197 env
.Append(CCFLAGS
='-fno-strict-aliasing')
198 env
.Append(CCFLAGS
=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
199 if sys
.platform
== 'cygwin':
200 # cygwin has some header file issues...
201 env
.Append(CCFLAGS
=Split("-Wno-uninitialized"))
202 env
.Append(CPPPATH
=[Dir('ext/dnet')])
205 if not env
.has_key('SWIG'):
206 print 'Error: SWIG utility not found.'
207 print ' Please install (see http://www.swig.org) and retry.'
210 # Check for appropriate SWIG version
211 swig_version
= os
.popen('swig -version').read().split()
212 # First 3 words should be "SWIG Version x.y.z"
213 if swig_version
[0] != 'SWIG' or swig_version
[1] != 'Version':
214 print 'Error determining SWIG version.'
217 min_swig_version
= '1.3.28'
218 if compare_versions(swig_version
[2], min_swig_version
) < 0:
219 print 'Error: SWIG version', min_swig_version
, 'or newer required.'
220 print ' Installed version:', swig_version
[2]
223 # Set up SWIG flags & scanner
224 env
.Append(SWIGFLAGS
=Split('-c++ -python -modern $_CPPINCFLAGS'))
228 swig_inc_re
= '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
230 swig_scanner
= SCons
.Scanner
.ClassicCPP("SwigScan", ".i", "CPPPATH",
233 env
.Append(SCANNERS
= swig_scanner
)
235 # Platform-specific configuration. Note again that we assume that all
236 # builds under a given build root run on the same host platform.
237 conf
= Configure(env
,
238 conf_dir
= os
.path
.join(build_root
, '.scons_config'),
239 log_file
= os
.path
.join(build_root
, 'scons_config.log'))
241 # Find Python include and library directories for embedding the
242 # interpreter. For consistency, we will use the same Python
243 # installation used to run scons (and thus this script). If you want
244 # to link in an alternate version, see above for instructions on how
245 # to invoke scons with a different copy of the Python interpreter.
247 # Get brief Python version name (e.g., "python2.4") for locating
248 # include & library files
249 py_version_name
= 'python' + sys
.version
[:3]
251 # include path, e.g. /usr/local/include/python2.4
252 py_header_path
= os
.path
.join(sys
.exec_prefix
, 'include', py_version_name
)
253 env
.Append(CPPPATH
= py_header_path
)
254 # verify that it works
255 if not conf
.CheckHeader('Python.h', '<>'):
256 print "Error: can't find Python.h header in", py_header_path
259 # add library path too if it's not in the default place
261 if sys
.exec_prefix
!= '/usr':
262 py_lib_path
= os
.path
.join(sys
.exec_prefix
, 'lib')
263 elif sys
.platform
== 'cygwin':
264 # cygwin puts the .dll in /bin for some reason
267 env
.Append(LIBPATH
= py_lib_path
)
268 print 'Adding', py_lib_path
, 'to LIBPATH for', py_version_name
269 if not conf
.CheckLib(py_version_name
):
270 print "Error: can't find Python library", py_version_name
273 # Check for zlib. If the check passes, libz will be automatically
274 # added to the LIBS environment variable.
275 if not conf
.CheckLibWithHeader('z', 'zlib.h', 'C++'):
276 print 'Error: did not find needed zlib compression library '\
277 'and/or zlib.h header file.'
278 print ' Please install zlib and try again.'
281 # Check for <fenv.h> (C99 FP environment control)
282 have_fenv
= conf
.CheckHeader('fenv.h', '<>')
284 print "Warning: Header file <fenv.h> not found."
285 print " This host has no IEEE FP rounding mode control."
288 mysql_config
= WhereIs('mysql_config')
289 have_mysql
= mysql_config
!= None
291 # Check MySQL version.
293 mysql_version
= os
.popen(mysql_config
+ ' --version').read()
294 min_mysql_version
= '4.1'
295 if compare_versions(mysql_version
, min_mysql_version
) < 0:
296 print 'Warning: MySQL', min_mysql_version
, 'or newer required.'
297 print ' Version', mysql_version
, 'detected.'
300 # Set up mysql_config commands.
302 mysql_config_include
= mysql_config
+ ' --include'
303 if os
.system(mysql_config_include
+ ' > /dev/null') != 0:
304 # older mysql_config versions don't support --include, use
306 mysql_config_include
= mysql_config
+ ' --cflags | sed s/\\\'//g'
307 # This seems to work in all versions
308 mysql_config_libs
= mysql_config
+ ' --libs'
312 # Define the universe of supported ISAs
313 env
['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']
315 # Define the universe of supported CPU models
316 env
['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU',
320 # Sticky options get saved in the options file so they persist from
321 # one invocation to the next (unless overridden, in which case the new
322 # value becomes sticky).
323 sticky_opts
= Options(args
=ARGUMENTS
)
324 sticky_opts
.AddOptions(
325 EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env
['ALL_ISA_LIST']),
326 BoolOption('FULL_SYSTEM', 'Full-system support', False),
327 # There's a bug in scons 0.96.1 that causes ListOptions with list
328 # values (more than one value) not to be able to be restored from
329 # a saved option file. If this causes trouble then upgrade to
330 # scons 0.96.90 or later.
331 ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU',
332 env
['ALL_CPU_LIST']),
333 BoolOption('ALPHA_TLASER',
334 'Model Alpha TurboLaser platform (vs. Tsunami)', False),
335 BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
336 BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
338 BoolOption('SS_COMPATIBLE_FP',
339 'Make floating-point results compatible with SimpleScalar',
341 BoolOption('USE_SSE2',
342 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
344 BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql
),
345 BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv
),
346 BoolOption('USE_CHECKER', 'Use checker for detailed CPU models', False),
347 ('CC', 'C compiler', os
.environ
.get('CC', env
['CC'])),
348 ('CXX', 'C++ compiler', os
.environ
.get('CXX', env
['CXX'])),
349 BoolOption('BATCH', 'Use batch pool for build and tests', False),
350 ('BATCH_CMD', 'Batch pool submission command name', 'qdo')
353 # Non-sticky options only apply to the current build.
354 nonsticky_opts
= Options(args
=ARGUMENTS
)
355 nonsticky_opts
.AddOptions(
356 BoolOption('update_ref', 'Update test reference outputs', False)
359 # These options get exported to #defines in config/*.hh (see src/SConscript).
360 env
.ExportOptions
= ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \
361 'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \
364 # Define a handy 'no-op' action
365 def no_action(target
, source
, env
):
368 env
.NoAction
= Action(no_action
, None)
370 ###################################################
372 # Define a SCons builder for configuration flag headers.
374 ###################################################
376 # This function generates a config header file that #defines the
377 # option symbol to the current option setting (0 or 1). The source
378 # operands are the name of the option and a Value node containing the
379 # value of the option.
380 def build_config_file(target
, source
, env
):
381 (option
, value
) = [s
.get_contents() for s
in source
]
382 f
= file(str(target
[0]), 'w')
383 print >> f
, '#define', option
, value
387 # Generate the message to be printed when building the config file.
388 def build_config_file_string(target
, source
, env
):
389 (option
, value
) = [s
.get_contents() for s
in source
]
390 return "Defining %s as %s in %s." % (option
, value
, target
[0])
392 # Combine the two functions into a scons Action object.
393 config_action
= Action(build_config_file
, build_config_file_string
)
395 # The emitter munges the source & target node lists to reflect what
396 # we're really doing.
397 def config_emitter(target
, source
, env
):
398 # extract option name from Builder arg
399 option
= str(target
[0])
400 # True target is config header file
401 target
= os
.path
.join('config', option
.lower() + '.hh')
402 # Force value to 0/1 even if it's a Python bool
403 val
= int(eval(str(env
[option
])))
404 # Sources are option name & value (packaged in SCons Value nodes)
405 return ([target
], [Value(option
), Value(val
)])
407 config_builder
= Builder(emitter
= config_emitter
, action
= config_action
)
409 env
.Append(BUILDERS
= { 'ConfigFile' : config_builder
})
411 ###################################################
413 # Define a SCons builder for copying files. This is used by the
414 # Python zipfile code in src/python/SConscript, but is placed up here
415 # since it's potentially more generally applicable.
417 ###################################################
419 copy_builder
= Builder(action
= Copy("$TARGET", "$SOURCE"))
421 env
.Append(BUILDERS
= { 'CopyFile' : copy_builder
})
423 ###################################################
425 # Define a simple SCons builder to concatenate files.
427 # Used to append the Python zip archive to the executable.
429 ###################################################
431 concat_builder
= Builder(action
= Action(['cat $SOURCES > $TARGET',
432 'chmod +x $TARGET']))
434 env
.Append(BUILDERS
= { 'Concat' : concat_builder
})
439 Usage: scons [scons options] [build options] [target(s)]
443 # libelf build is shared across all configs in the build root.
444 env
.SConscript('ext/libelf/SConscript',
445 build_dir
= os
.path
.join(build_root
, 'libelf'),
448 ###################################################
450 # Define build environments for selected configurations.
452 ###################################################
457 for build_path
in build_paths
:
458 print "Building in", build_path
459 # build_dir is the tail component of build path, and is used to
460 # determine the build parameters (e.g., 'ALPHA_SE')
461 (build_root
, build_dir
) = os
.path
.split(build_path
)
462 # Make a copy of the build-root environment to use for this config.
463 env
= base_env
.Copy()
465 # Set env options according to the build directory config.
466 sticky_opts
.files
= []
467 # Options for $BUILD_ROOT/$BUILD_DIR are stored in
468 # $BUILD_ROOT/options/$BUILD_DIR so you can nuke
469 # $BUILD_ROOT/$BUILD_DIR without losing your options settings.
470 current_opts_file
= os
.path
.join(build_root
, 'options', build_dir
)
471 if os
.path
.isfile(current_opts_file
):
472 sticky_opts
.files
.append(current_opts_file
)
473 print "Using saved options file %s" % current_opts_file
475 # Build dir-specific options file doesn't exist.
477 # Make sure the directory is there so we can create it later
478 opt_dir
= os
.path
.dirname(current_opts_file
)
479 if not os
.path
.isdir(opt_dir
):
482 # Get default build options from source tree. Options are
483 # normally determined by name of $BUILD_DIR, but can be
484 # overriden by 'default=' arg on command line.
485 default_opts_file
= os
.path
.join('build_opts',
486 ARGUMENTS
.get('default', build_dir
))
487 if os
.path
.isfile(default_opts_file
):
488 sticky_opts
.files
.append(default_opts_file
)
489 print "Options file %s not found,\n using defaults in %s" \
490 % (current_opts_file
, default_opts_file
)
492 print "Error: cannot find options file %s or %s" \
493 % (current_opts_file
, default_opts_file
)
496 # Apply current option settings to env
497 sticky_opts
.Update(env
)
498 nonsticky_opts
.Update(env
)
500 help_text
+= "Sticky options for %s:\n" % build_dir \
501 + sticky_opts
.GenerateHelpText(env
) \
502 + "\nNon-sticky options for %s:\n" % build_dir \
503 + nonsticky_opts
.GenerateHelpText(env
)
505 # Process option settings.
507 if not have_fenv
and env
['USE_FENV']:
508 print "Warning: <fenv.h> not available; " \
509 "forcing USE_FENV to False in", build_dir
+ "."
510 env
['USE_FENV'] = False
512 if not env
['USE_FENV']:
513 print "Warning: No IEEE FP rounding mode control in", build_dir
+ "."
514 print " FP results may deviate slightly from other platforms."
517 env
.Append(LIBS
=['efence'])
521 print "Warning: MySQL not available; " \
522 "forcing USE_MYSQL to False in", build_dir
+ "."
523 env
['USE_MYSQL'] = False
525 print "Compiling in", build_dir
, "with MySQL support."
526 env
.ParseConfig(mysql_config_libs
)
527 env
.ParseConfig(mysql_config_include
)
529 # Save sticky option settings back to current options file
530 sticky_opts
.Save(current_opts_file
, env
)
532 # Do this after we save setting back, or else we'll tack on an
533 # extra 'qdo' every time we run scons.
535 env
['CC'] = env
['BATCH_CMD'] + ' ' + env
['CC']
536 env
['CXX'] = env
['BATCH_CMD'] + ' ' + env
['CXX']
539 env
.Append(CCFLAGS
='-msse2')
541 # The src/SConscript file sets up the build rules in 'env' according
542 # to the configured options. It returns a list of environments,
543 # one for each variant build (debug, opt, etc.)
544 envList
= SConscript('src/SConscript', build_dir
= build_path
,
547 # Set up the regression tests for each build.
549 SConscript('tests/SConscript',
550 build_dir
= os
.path
.join(build_path
, 'tests', e
.Label
),
551 exports
= { 'env' : e
}, duplicate
= False)
555 ###################################################
557 # Let SCons do its thing. At this point SCons will use the defined
558 # build environments to build the requested targets.
560 ###################################################