3 # Copyright (c) 2011 Advanced Micro Devices, Inc.
4 # Copyright (c) 2009 The Hewlett-Packard Development Company
5 # Copyright (c) 2004-2005 The Regents of The University of Michigan
8 # Redistribution and use in source and binary forms, with or without
9 # modification, are permitted provided that the following conditions are
10 # met: redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer;
12 # redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution;
15 # neither the name of the copyright holders nor the names of its
16 # contributors may be used to endorse or promote products derived from
17 # this software without specific prior written permission.
19 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 # Authors: Steve Reinhardt
34 ###################################################
36 # SCons top-level build description (SConstruct) file.
38 # While in this directory ('gem5'), just type 'scons' to build the default
39 # configuration (see below), or type 'scons build/<CONFIG>/<binary>'
40 # to build some other configuration (e.g., 'build/ALPHA/gem5.opt' for
41 # the optimized full-system version).
43 # You can build gem5 in a different directory as long as there is a
44 # 'build/<CONFIG>' somewhere along the target path. The build system
45 # expects that all configs under the same build directory are being
46 # built for the same host system.
50 # The following two commands are equivalent. The '-u' option tells
51 # scons to search up the directory tree for this SConstruct file.
52 # % cd <path-to-src>/gem5 ; scons build/ALPHA/gem5.debug
53 # % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.debug
55 # The following two commands are equivalent and demonstrate building
56 # in a directory outside of the source tree. The '-C' option tells
57 # scons to chdir to the specified directory to find this SConstruct
59 # % cd <path-to-src>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug
60 # % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug
62 # You can use 'scons -H' to print scons options. If you're in this
63 # 'gem5' directory (or use -u or -C to tell scons where to find this
64 # file), you can use 'scons -h' to print all the gem5-specific build
67 ###################################################
69 # Check for recent-enough Python and SCons versions.
71 # Really old versions of scons only take two options for the
72 # function, so check once without the revision and once with the
73 # revision, the first instance will fail for stuff other than
74 # 0.98, and the second will fail for 0.98.0
75 EnsureSConsVersion(0, 98)
76 EnsureSConsVersion(0, 98, 1)
79 For more details, see:
80 http://gem5.org/Dependencies
84 # We ensure the python version early because we have stuff that
87 EnsurePythonVersion(2, 4)
90 You can use a non-default installation of the Python interpreter by
91 either (1) rearranging your PATH so that scons finds the non-default
92 'python' first or (2) explicitly invoking an alternative interpreter
95 For more details, see:
96 http://gem5.org/wiki/index.php/Using_a_non-default_Python_installation
100 # Global Python includes
106 from os
import mkdir
, environ
107 from os
.path
import abspath
, basename
, dirname
, expanduser
, normpath
108 from os
.path
import exists
, isdir
, isfile
109 from os
.path
import join
as joinpath
, split
as splitpath
115 extra_python_paths
= [
116 Dir('src/python').srcnode().abspath
, # gem5 includes
117 Dir('ext/ply').srcnode().abspath
, # ply is used by several files
120 sys
.path
[1:1] = extra_python_paths
122 from m5
.util
import compareVersions
, readCommand
123 from m5
.util
.terminal
import get_termcap
134 # There's a bug in scons in that (1) by default, the help texts from
135 # AddOption() are supposed to be displayed when you type 'scons -h'
136 # and (2) you can override the help displayed by 'scons -h' using the
137 # Help() function, but these two features are incompatible: once
138 # you've overridden the help text using Help(), there's no way to get
139 # at the help texts from AddOptions. See:
140 # http://scons.tigris.org/issues/show_bug.cgi?id=2356
141 # http://scons.tigris.org/issues/show_bug.cgi?id=2611
142 # This hack lets us extract the help text from AddOptions and
143 # re-inject it via Help(). Ideally someday this bug will be fixed and
144 # we can just use AddOption directly.
145 def AddLocalOption(*args
, **kwargs
):
148 help = " " + ", ".join(args
)
151 if length
>= col_width
:
152 help += "\n" + " " * col_width
154 help += " " * (col_width
- length
)
155 help += kwargs
["help"]
156 help_texts
["options"] += help + "\n"
158 AddOption(*args
, **kwargs
)
160 AddLocalOption('--colors', dest
='use_colors', action
='store_true',
161 help="Add color to abbreviated scons output")
162 AddLocalOption('--no-colors', dest
='use_colors', action
='store_false',
163 help="Don't add color to abbreviated scons output")
164 AddLocalOption('--default', dest
='default', type='string', action
='store',
165 help='Override which build_opts file to use for defaults')
166 AddLocalOption('--ignore-style', dest
='ignore_style', action
='store_true',
167 help='Disable style checking hooks')
168 AddLocalOption('--update-ref', dest
='update_ref', action
='store_true',
169 help='Update test reference outputs')
170 AddLocalOption('--verbose', dest
='verbose', action
='store_true',
171 help='Print full tool command lines')
173 termcap
= get_termcap(GetOption('use_colors'))
175 ########################################################################
177 # Set up the main build environment.
179 ########################################################################
180 use_vars
= set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
181 'PYTHONPATH', 'RANLIB', 'SWIG' ])
184 for key
,val
in os
.environ
.iteritems():
185 if key
in use_vars
or key
.startswith("M5"):
188 main
= Environment(ENV
=use_env
)
189 main
.Decider('MD5-timestamp')
190 main
.root
= Dir(".") # The current directory (where this file lives).
191 main
.srcdir
= Dir("src") # The source directory
193 # add useful python code PYTHONPATH so it can be used by subprocesses
195 main
.AppendENVPath('PYTHONPATH', extra_python_paths
)
197 ########################################################################
201 # If the gem5 directory is a mercurial repository, we should do some
204 ########################################################################
206 hgdir
= main
.root
.Dir(".hg")
208 mercurial_style_message
= """
209 You're missing the gem5 style hook, which automatically checks your code
210 against the gem5 style rules on hg commit and qrefresh commands. This
211 script will now install the hook in your .hg/hgrc file.
212 Press enter to continue, or ctrl-c to abort: """
214 mercurial_style_hook
= """
215 # The following lines were automatically added by gem5/SConstruct
216 # to provide the gem5 style-checking hooks
218 style = %s/util/style.py
221 pretxncommit.style = python:style.check_style
222 pre-qrefresh.style = python:style.check_style
223 # End of SConstruct additions
225 """ % (main
.root
.abspath
)
227 mercurial_lib_not_found
= """
228 Mercurial libraries cannot be found, ignoring style hook. If
229 you are a gem5 developer, please fix this and run the style
230 hook. It is important.
233 # Check for style hook and prompt for installation if it's not there.
234 # Skip this if --ignore-style was specified, there's no .hg dir to
235 # install a hook in, or there's no interactive terminal to prompt.
236 if not GetOption('ignore_style') and hgdir
.exists() and sys
.stdin
.isatty():
239 from mercurial
import ui
241 ui
.readconfig(hgdir
.File('hgrc').abspath
)
242 style_hook
= ui
.config('hooks', 'pretxncommit.style', None) and \
243 ui
.config('hooks', 'pre-qrefresh.style', None)
245 print mercurial_lib_not_found
248 print mercurial_style_message
,
249 # continue unless user does ctrl-c/ctrl-d etc.
253 print "Input exception, exiting scons.\n"
255 hgrc_path
= '%s/.hg/hgrc' % main
.root
.abspath
256 print "Adding style hook to", hgrc_path
, "\n"
258 hgrc
= open(hgrc_path
, 'a')
259 hgrc
.write(mercurial_style_hook
)
262 print "Error updating", hgrc_path
266 ###################################################
268 # Figure out which configurations to set up based on the path(s) of
271 ###################################################
273 # Find default configuration & binary.
274 Default(environ
.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug'))
276 # helper function: find last occurrence of element in list
277 def rfind(l
, elt
, offs
= -1):
278 for i
in range(len(l
)+offs
, 0, -1):
281 raise ValueError, "element not found"
283 # Take a list of paths (or SCons Nodes) and return a list with all
284 # paths made absolute and ~-expanded. Paths will be interpreted
285 # relative to the launch directory unless a different root is provided
286 def makePathListAbsolute(path_list
, root
=GetLaunchDir()):
287 return [abspath(joinpath(root
, expanduser(str(p
))))
290 # Each target must have 'build' in the interior of the path; the
291 # directory below this will determine the build parameters. For
292 # example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
293 # recognize that ALPHA_SE specifies the configuration because it
294 # follow 'build' in the build path.
296 # The funky assignment to "[:]" is needed to replace the list contents
297 # in place rather than reassign the symbol to a new list, which
298 # doesn't work (obviously!).
299 BUILD_TARGETS
[:] = makePathListAbsolute(BUILD_TARGETS
)
301 # Generate a list of the unique build roots and configs that the
302 # collected targets reference.
305 for t
in BUILD_TARGETS
:
306 path_dirs
= t
.split('/')
308 build_top
= rfind(path_dirs
, 'build', -2)
310 print "Error: no non-leaf 'build' dir found on target path", t
312 this_build_root
= joinpath('/',*path_dirs
[:build_top
+1])
314 build_root
= this_build_root
316 if this_build_root
!= build_root
:
317 print "Error: build targets not under same build root\n"\
318 " %s\n %s" % (build_root
, this_build_root
)
320 variant_path
= joinpath('/',*path_dirs
[:build_top
+2])
321 if variant_path
not in variant_paths
:
322 variant_paths
.append(variant_path
)
324 # Make sure build_root exists (might not if this is the first build there)
325 if not isdir(build_root
):
327 main
['BUILDROOT'] = build_root
331 main
.SConsignFile(joinpath(build_root
, "sconsign"))
333 # Default duplicate option is to use hard links, but this messes up
334 # when you use emacs to edit a file in the target dir, as emacs moves
335 # file to file~ then copies to file, breaking the link. Symbolic
336 # (soft) links work better.
337 main
.SetOption('duplicate', 'soft-copy')
340 # Set up global sticky variables... these are common to an entire build
341 # tree (not specific to a particular build like ALPHA_SE)
344 global_vars_file
= joinpath(build_root
, 'variables.global')
346 global_vars
= Variables(global_vars_file
, args
=ARGUMENTS
)
348 global_vars
.AddVariables(
349 ('CC', 'C compiler', environ
.get('CC', main
['CC'])),
350 ('CXX', 'C++ compiler', environ
.get('CXX', main
['CXX'])),
351 ('SWIG', 'SWIG tool', environ
.get('SWIG', main
['SWIG'])),
352 ('BATCH', 'Use batch pool for build and tests', False),
353 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
354 ('M5_BUILD_CACHE', 'Cache built objects in this directory', False),
355 ('EXTRAS', 'Add extra directories to the compilation', '')
358 # Update main environment with values from ARGUMENTS & global_vars_file
359 global_vars
.Update(main
)
360 help_texts
["global_vars"] += global_vars
.GenerateHelpText(main
)
362 # Save sticky variable settings back to current variables file
363 global_vars
.Save(global_vars_file
, main
)
365 # Parse EXTRAS variable to build list of all directories where we're
366 # look for sources etc. This list is exported as extras_dir_list.
367 base_dir
= main
.srcdir
.abspath
369 extras_dir_list
= makePathListAbsolute(main
['EXTRAS'].split(':'))
374 Export('extras_dir_list')
376 # the ext directory should be on the #includes path
377 main
.Append(CPPPATH
=[Dir('ext')])
379 def strip_build_path(path
, env
):
381 variant_base
= env
['BUILDROOT'] + os
.path
.sep
382 if path
.startswith(variant_base
):
383 path
= path
[len(variant_base
):]
384 elif path
.startswith('build/'):
388 # Generate a string of the form:
389 # common/path/prefix/src1, src2 -> tgt1, tgt2
390 # to print while building.
391 class Transform(object):
392 # all specific color settings should be here and nowhere else
393 tool_color
= termcap
.Normal
394 pfx_color
= termcap
.Yellow
395 srcs_color
= termcap
.Yellow
+ termcap
.Bold
396 arrow_color
= termcap
.Blue
+ termcap
.Bold
397 tgts_color
= termcap
.Yellow
+ termcap
.Bold
399 def __init__(self
, tool
, max_sources
=99):
400 self
.format
= self
.tool_color
+ (" [%8s] " % tool
) \
401 + self
.pfx_color
+ "%s" \
402 + self
.srcs_color
+ "%s" \
403 + self
.arrow_color
+ " -> " \
404 + self
.tgts_color
+ "%s" \
406 self
.max_sources
= max_sources
408 def __call__(self
, target
, source
, env
, for_signature
=None):
409 # truncate source list according to max_sources param
410 source
= source
[0:self
.max_sources
]
412 return strip_build_path(str(f
), env
)
414 srcs
= map(strip
, source
)
417 tgts
= map(strip
, target
)
418 # surprisingly, os.path.commonprefix is a dumb char-by-char string
419 # operation that has nothing to do with paths.
420 com_pfx
= os
.path
.commonprefix(srcs
+ tgts
)
421 com_pfx_len
= len(com_pfx
)
423 # do some cleanup and sanity checking on common prefix
424 if com_pfx
[-1] == ".":
425 # prefix matches all but file extension: ok
426 # back up one to change 'foo.cc -> o' to 'foo.cc -> .o'
427 com_pfx
= com_pfx
[0:-1]
428 elif com_pfx
[-1] == "/":
429 # common prefix is directory path: OK
432 src0_len
= len(srcs
[0])
433 tgt0_len
= len(tgts
[0])
434 if src0_len
== com_pfx_len
:
435 # source is a substring of target, OK
437 elif tgt0_len
== com_pfx_len
:
438 # target is a substring of source, need to back up to
439 # avoid empty string on RHS of arrow
440 sep_idx
= com_pfx
.rfind(".")
442 com_pfx
= com_pfx
[0:sep_idx
]
445 elif src0_len
> com_pfx_len
and srcs
[0][com_pfx_len
] == ".":
446 # still splitting at file extension: ok
449 # probably a fluke; ignore it
451 # recalculate length in case com_pfx was modified
452 com_pfx_len
= len(com_pfx
)
454 f
= map(lambda s
: s
[com_pfx_len
:], files
)
456 return self
.format
% (com_pfx
, fmt(srcs
), fmt(tgts
))
460 # enable the regression script to use the termcap
461 main
['TERMCAP'] = termcap
463 if GetOption('verbose'):
464 def MakeAction(action
, string
, *args
, **kwargs
):
465 return Action(action
, *args
, **kwargs
)
468 main
['CCCOMSTR'] = Transform("CC")
469 main
['CXXCOMSTR'] = Transform("CXX")
470 main
['ASCOMSTR'] = Transform("AS")
471 main
['SWIGCOMSTR'] = Transform("SWIG")
472 main
['ARCOMSTR'] = Transform("AR", 0)
473 main
['LINKCOMSTR'] = Transform("LINK", 0)
474 main
['RANLIBCOMSTR'] = Transform("RANLIB", 0)
475 main
['M4COMSTR'] = Transform("M4")
476 main
['SHCCCOMSTR'] = Transform("SHCC")
477 main
['SHCXXCOMSTR'] = Transform("SHCXX")
480 CXX_version
= readCommand([main
['CXX'],'--version'], exception
=False)
481 CXX_V
= readCommand([main
['CXX'],'-V'], exception
=False)
483 main
['GCC'] = CXX_version
and CXX_version
.find('g++') >= 0
484 main
['SUNCC'] = CXX_V
and CXX_V
.find('Sun C++') >= 0
485 main
['ICC'] = CXX_V
and CXX_V
.find('Intel') >= 0
486 main
['CLANG'] = CXX_version
and CXX_version
.find('clang') >= 0
487 if main
['GCC'] + main
['SUNCC'] + main
['ICC'] + main
['CLANG'] > 1:
488 print 'Error: How can we have two at the same time?'
491 # Set up default C++ compiler flags
493 main
.Append(CCFLAGS
=['-pipe'])
494 main
.Append(CCFLAGS
=['-fno-strict-aliasing'])
495 main
.Append(CCFLAGS
=['-Wall', '-Wno-sign-compare', '-Wundef'])
496 # Read the GCC version to check for versions with bugs
497 # Note CCVERSION doesn't work here because it is run with the CC
498 # before we override it from the command line
499 gcc_version
= readCommand([main
['CXX'], '-dumpversion'], exception
=False)
500 main
['GCC_VERSION'] = gcc_version
501 if not compareVersions(gcc_version
, '4.4.1') or \
502 not compareVersions(gcc_version
, '4.4.2'):
503 print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
504 main
.Append(CCFLAGS
=['-fno-tree-vectorize'])
505 if compareVersions(gcc_version
, '4.6') >= 0:
506 main
.Append(CXXFLAGS
=['-std=c++0x'])
508 pass #Fix me... add warning flags once we clean up icc warnings
510 main
.Append(CCFLAGS
=['-Qoption ccfe'])
511 main
.Append(CCFLAGS
=['-features=gcc'])
512 main
.Append(CCFLAGS
=['-features=extensions'])
513 main
.Append(CCFLAGS
=['-library=stlport4'])
514 main
.Append(CCFLAGS
=['-xar'])
515 #main.Append(CCFLAGS=['-instances=semiexplicit'])
517 clang_version_re
= re
.compile(".* version (\d+\.\d+)")
518 clang_version_match
= clang_version_re
.match(CXX_version
)
519 if (clang_version_match
):
520 clang_version
= clang_version_match
.groups()[0]
521 if compareVersions(clang_version
, "2.9") < 0:
522 print 'Error: clang version 2.9 or newer required.'
523 print ' Installed version:', clang_version
526 print 'Error: Unable to determine clang version.'
529 main
.Append(CCFLAGS
=['-pipe'])
530 main
.Append(CCFLAGS
=['-fno-strict-aliasing'])
531 main
.Append(CCFLAGS
=['-Wall', '-Wno-sign-compare', '-Wundef'])
532 main
.Append(CCFLAGS
=['-Wno-tautological-compare'])
533 main
.Append(CCFLAGS
=['-Wno-self-assign'])
534 # Ruby makes frequent use of extraneous parantheses in the printing
536 main
.Append(CCFLAGS
=['-Wno-parentheses'])
538 if compareVersions(clang_version
, "3") >= 0:
539 main
.Append(CXXFLAGS
=['-std=c++0x'])
541 print 'Error: Don\'t know what compiler options to use for your compiler.'
542 print ' Please fix SConstruct and src/SConscript and try again.'
545 # Set up common yacc/bison flags (needed for Ruby)
546 main
['YACCFLAGS'] = '-d'
547 main
['YACCHXXFILESUFFIX'] = '.hh'
549 # Do this after we save setting back, or else we'll tack on an
550 # extra 'qdo' every time we run scons.
552 main
['CC'] = main
['BATCH_CMD'] + ' ' + main
['CC']
553 main
['CXX'] = main
['BATCH_CMD'] + ' ' + main
['CXX']
554 main
['AS'] = main
['BATCH_CMD'] + ' ' + main
['AS']
555 main
['AR'] = main
['BATCH_CMD'] + ' ' + main
['AR']
556 main
['RANLIB'] = main
['BATCH_CMD'] + ' ' + main
['RANLIB']
558 if sys
.platform
== 'cygwin':
559 # cygwin has some header file issues...
560 main
.Append(CCFLAGS
=["-Wno-uninitialized"])
563 if not main
.has_key('SWIG'):
564 print 'Error: SWIG utility not found.'
565 print ' Please install (see http://www.swig.org) and retry.'
568 # Check for appropriate SWIG version
569 swig_version
= readCommand(('swig', '-version'), exception
='').split()
570 # First 3 words should be "SWIG Version x.y.z"
571 if len(swig_version
) < 3 or \
572 swig_version
[0] != 'SWIG' or swig_version
[1] != 'Version':
573 print 'Error determining SWIG version.'
576 min_swig_version
= '1.3.34'
577 if compareVersions(swig_version
[2], min_swig_version
) < 0:
578 print 'Error: SWIG version', min_swig_version
, 'or newer required.'
579 print ' Installed version:', swig_version
[2]
582 # Set up SWIG flags & scanner
583 swig_flags
=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
584 main
.Append(SWIGFLAGS
=swig_flags
)
586 # filter out all existing swig scanners, they mess up the dependency
587 # stuff for some reason
589 for scanner
in main
['SCANNERS']:
590 skeys
= scanner
.skeys
594 if isinstance(skeys
, (list, tuple)) and '.i' in skeys
:
597 scanners
.append(scanner
)
599 # add the new swig scanner that we like better
600 from SCons
.Scanner
import ClassicCPP
as CPPScanner
601 swig_inc_re
= '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
602 scanners
.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re
))
604 # replace the scanners list that has what we want
605 main
['SCANNERS'] = scanners
607 # Add a custom Check function to the Configure context so that we can
608 # figure out if the compiler adds leading underscores to global
609 # variables. This is needed for the autogenerated asm files that we
610 # use for embedding the python code.
611 def CheckLeading(context
):
612 context
.Message("Checking for leading underscore in global variables...")
613 # 1) Define a global variable called x from asm so the C compiler
614 # won't change the symbol at all.
615 # 2) Declare that variable.
616 # 3) Use the variable
618 # If the compiler prepends an underscore, this will successfully
619 # link because the external symbol 'x' will be called '_x' which
620 # was defined by the asm statement. If the compiler does not
621 # prepend an underscore, this will not successfully link because
622 # '_x' will have been defined by assembly, while the C portion of
623 # the code will be trying to use 'x'
624 ret
= context
.TryLink('''
625 asm(".globl _x; _x: .byte 0");
627 int main() { return x; }
629 context
.env
.Append(LEADING_UNDERSCORE
=ret
)
633 # Platform-specific configuration. Note again that we assume that all
634 # builds under a given build root run on the same host platform.
635 conf
= Configure(main
,
636 conf_dir
= joinpath(build_root
, '.scons_config'),
637 log_file
= joinpath(build_root
, 'scons_config.log'),
638 custom_tests
= { 'CheckLeading' : CheckLeading
})
640 # Check for leading underscores. Don't really need to worry either
641 # way so don't need to check the return code.
644 # Check if we should compile a 64 bit binary on Mac OS X/Darwin
647 uname
= platform
.uname()
648 if uname
[0] == 'Darwin' and compareVersions(uname
[2], '9.0.0') >= 0:
649 if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]):
650 main
.Append(CCFLAGS
=['-arch', 'x86_64'])
651 main
.Append(CFLAGS
=['-arch', 'x86_64'])
652 main
.Append(LINKFLAGS
=['-arch', 'x86_64'])
653 main
.Append(ASFLAGS
=['-arch', 'x86_64'])
657 # Recent versions of scons substitute a "Null" object for Configure()
658 # when configuration isn't necessary, e.g., if the "--help" option is
659 # present. Unfortuantely this Null object always returns false,
660 # breaking all our configuration checks. We replace it with our own
661 # more optimistic null object that returns True instead.
663 def NullCheck(*args
, **kwargs
):
667 def __init__(self
, env
):
671 def __getattr__(self
, mname
):
674 conf
= NullConf(main
)
676 # Find Python include and library directories for embedding the
677 # interpreter. For consistency, we will use the same Python
678 # installation used to run scons (and thus this script). If you want
679 # to link in an alternate version, see above for instructions on how
680 # to invoke scons with a different copy of the Python interpreter.
681 from distutils
import sysconfig
683 py_getvar
= sysconfig
.get_config_var
685 py_debug
= getattr(sys
, 'pydebug', False)
686 py_version
= 'python' + py_getvar('VERSION') + (py_debug
and "_d" or "")
688 py_general_include
= sysconfig
.get_python_inc()
689 py_platform_include
= sysconfig
.get_python_inc(plat_specific
=True)
690 py_includes
= [ py_general_include
]
691 if py_platform_include
!= py_general_include
:
692 py_includes
.append(py_platform_include
)
694 py_lib_path
= [ py_getvar('LIBDIR') ]
695 # add the prefix/lib/pythonX.Y/config dir, but only if there is no
696 # shared library in prefix/lib/.
697 if not py_getvar('Py_ENABLE_SHARED'):
698 py_lib_path
.append(py_getvar('LIBPL'))
701 for lib
in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split():
702 if not lib
.startswith('-l'):
703 # Python requires some special flags to link (e.g. -framework
704 # common on OS X systems), assume appending preserves order
705 main
.Append(LINKFLAGS
=[lib
])
708 if lib
not in py_libs
:
710 py_libs
.append(py_version
)
712 main
.Append(CPPPATH
=py_includes
)
713 main
.Append(LIBPATH
=py_lib_path
)
715 # Cache build files in the supplied directory.
716 if main
['M5_BUILD_CACHE']:
717 print 'Using build cache located at', main
['M5_BUILD_CACHE']
718 CacheDir(main
['M5_BUILD_CACHE'])
721 # verify that this stuff works
722 if not conf
.CheckHeader('Python.h', '<>'):
723 print "Error: can't find Python.h header in", py_includes
727 if not conf
.CheckLib(lib
):
728 print "Error: can't find library %s required by python" % lib
731 # On Solaris you need to use libsocket for socket ops
732 if not conf
.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
733 if not conf
.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
734 print "Can't find library with socket calls (e.g. accept())"
737 # Check for zlib. If the check passes, libz will be automatically
738 # added to the LIBS environment variable.
739 if not conf
.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'):
740 print 'Error: did not find needed zlib compression library '\
741 'and/or zlib.h header file.'
742 print ' Please install zlib and try again.'
747 conf
.CheckLibWithHeader(None, 'time.h', 'C',
748 'clock_nanosleep(0,0,NULL,NULL);') or \
749 conf
.CheckLibWithHeader('rt', 'time.h', 'C',
750 'clock_nanosleep(0,0,NULL,NULL);')
752 if not have_posix_clock
:
753 print "Can't find library for POSIX clocks."
755 # Check for <fenv.h> (C99 FP environment control)
756 have_fenv
= conf
.CheckHeader('fenv.h', '<>')
758 print "Warning: Header file <fenv.h> not found."
759 print " This host has no IEEE FP rounding mode control."
761 ######################################################################
763 # Finish the configuration
767 ######################################################################
769 # Collect all non-global variables
772 # Define the universe of supported ISAs
774 Export('all_isa_list')
776 class CpuModel(object):
777 '''The CpuModel class encapsulates everything the ISA parser needs to
778 know about a particular CPU model.'''
780 # Dict of available CPU model objects. Accessible as CpuModel.dict.
785 # Constructor. Automatically adds models to CpuModel.dict.
786 def __init__(self
, name
, filename
, includes
, strings
, default
=False):
787 self
.name
= name
# name of model
788 self
.filename
= filename
# filename for output exec code
789 self
.includes
= includes
# include files needed in exec file
790 # The 'strings' dict holds all the per-CPU symbols we can
791 # substitute into templates etc.
792 self
.strings
= strings
794 # This cpu is enabled by default
795 self
.default
= default
798 if name
in CpuModel
.dict:
799 raise AttributeError, "CpuModel '%s' already registered" % name
800 CpuModel
.dict[name
] = self
801 CpuModel
.list.append(name
)
805 # Sticky variables get saved in the variables file so they persist from
806 # one invocation to the next (unless overridden, in which case the new
807 # value becomes sticky).
808 sticky_vars
= Variables(args
=ARGUMENTS
)
809 Export('sticky_vars')
811 # Sticky variables that should be exported
813 Export('export_vars')
815 # Walk the tree and execute all SConsopts scripts that wil add to the
817 if not GetOption('verbose'):
818 print "Reading SConsopts"
819 for bdir
in [ base_dir
] + extras_dir_list
:
821 print "Error: directory '%s' does not exist" % bdir
823 for root
, dirs
, files
in os
.walk(bdir
):
824 if 'SConsopts' in files
:
825 if GetOption('verbose'):
826 print "Reading", joinpath(root
, 'SConsopts')
827 SConscript(joinpath(root
, 'SConsopts'))
831 sticky_vars
.AddVariables(
832 EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list
),
833 ListVariable('CPU_MODELS', 'CPU models',
834 sorted(n
for n
,m
in CpuModel
.dict.iteritems() if m
.default
),
835 sorted(CpuModel
.list)),
836 BoolVariable('NO_FAST_ALLOC', 'Disable fast object allocator', False),
837 BoolVariable('FORCE_FAST_ALLOC',
838 'Enable fast object allocator, even for gem5.debug', False),
839 BoolVariable('FAST_ALLOC_STATS', 'Enable fast object allocator statistics',
841 BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger',
843 BoolVariable('SS_COMPATIBLE_FP',
844 'Make floating-point results compatible with SimpleScalar',
846 BoolVariable('USE_SSE2',
847 'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
849 BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock
),
850 BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv
),
851 BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False),
854 # These variables get exported to #defines in config/*.hh (see src/SConscript).
855 export_vars
+= ['USE_FENV', 'NO_FAST_ALLOC', 'FORCE_FAST_ALLOC',
856 'FAST_ALLOC_STATS', 'SS_COMPATIBLE_FP',
857 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
859 ###################################################
861 # Define a SCons builder for configuration flag headers.
863 ###################################################
865 # This function generates a config header file that #defines the
866 # variable symbol to the current variable setting (0 or 1). The source
867 # operands are the name of the variable and a Value node containing the
868 # value of the variable.
869 def build_config_file(target
, source
, env
):
870 (variable
, value
) = [s
.get_contents() for s
in source
]
871 f
= file(str(target
[0]), 'w')
872 print >> f
, '#define', variable
, value
876 # Combine the two functions into a scons Action object.
877 config_action
= MakeAction(build_config_file
, Transform("CONFIG H", 2))
879 # The emitter munges the source & target node lists to reflect what
880 # we're really doing.
881 def config_emitter(target
, source
, env
):
882 # extract variable name from Builder arg
883 variable
= str(target
[0])
884 # True target is config header file
885 target
= joinpath('config', variable
.lower() + '.hh')
887 if isinstance(val
, bool):
890 elif isinstance(val
, str):
891 val
= '"' + val
+ '"'
893 # Sources are variable name & value (packaged in SCons Value nodes)
894 return ([target
], [Value(variable
), Value(val
)])
896 config_builder
= Builder(emitter
= config_emitter
, action
= config_action
)
898 main
.Append(BUILDERS
= { 'ConfigFile' : config_builder
})
900 # libelf build is shared across all configs in the build root.
901 main
.SConscript('ext/libelf/SConscript',
902 variant_dir
= joinpath(build_root
, 'libelf'))
904 # gzstream build is shared across all configs in the build root.
905 main
.SConscript('ext/gzstream/SConscript',
906 variant_dir
= joinpath(build_root
, 'gzstream'))
908 ###################################################
910 # This function is used to set up a directory with switching headers
912 ###################################################
914 main
['ALL_ISA_LIST'] = all_isa_list
915 def make_switching_dir(dname
, switch_headers
, env
):
916 # Generate the header. target[0] is the full path of the output
917 # header to generate. 'source' is a dummy variable, since we get the
918 # list of ISAs from env['ALL_ISA_LIST'].
919 def gen_switch_hdr(target
, source
, env
):
920 fname
= str(target
[0])
922 isa
= env
['TARGET_ISA'].lower()
923 print >>f
, '#include "%s/%s/%s"' % (dname
, isa
, basename(fname
))
926 # Build SCons Action object. 'varlist' specifies env vars that this
927 # action depends on; when env['ALL_ISA_LIST'] changes these actions
928 # should get re-executed.
929 switch_hdr_action
= MakeAction(gen_switch_hdr
,
930 Transform("GENERATE"), varlist
=['ALL_ISA_LIST'])
932 # Instantiate actions for each header
933 for hdr
in switch_headers
:
934 env
.Command(hdr
, [], switch_hdr_action
)
935 Export('make_switching_dir')
937 ###################################################
939 # Define build environments for selected configurations.
941 ###################################################
943 for variant_path
in variant_paths
:
944 print "Building in", variant_path
946 # Make a copy of the build-root environment to use for this config.
948 env
['BUILDDIR'] = variant_path
950 # variant_dir is the tail component of build path, and is used to
951 # determine the build parameters (e.g., 'ALPHA_SE')
952 (build_root
, variant_dir
) = splitpath(variant_path
)
954 # Set env variables according to the build directory config.
955 sticky_vars
.files
= []
956 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in
957 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke
958 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings.
959 current_vars_file
= joinpath(build_root
, 'variables', variant_dir
)
960 if isfile(current_vars_file
):
961 sticky_vars
.files
.append(current_vars_file
)
962 print "Using saved variables file %s" % current_vars_file
964 # Build dir-specific variables file doesn't exist.
966 # Make sure the directory is there so we can create it later
967 opt_dir
= dirname(current_vars_file
)
968 if not isdir(opt_dir
):
971 # Get default build variables from source tree. Variables are
972 # normally determined by name of $VARIANT_DIR, but can be
973 # overridden by '--default=' arg on command line.
974 default
= GetOption('default')
975 opts_dir
= joinpath(main
.root
.abspath
, 'build_opts')
977 default_vars_files
= [joinpath(build_root
, 'variables', default
),
978 joinpath(opts_dir
, default
)]
980 default_vars_files
= [joinpath(opts_dir
, variant_dir
)]
981 existing_files
= filter(isfile
, default_vars_files
)
983 default_vars_file
= existing_files
[0]
984 sticky_vars
.files
.append(default_vars_file
)
985 print "Variables file %s not found,\n using defaults in %s" \
986 % (current_vars_file
, default_vars_file
)
988 print "Error: cannot find variables file %s or " \
989 "default file(s) %s" \
990 % (current_vars_file
, ' or '.join(default_vars_files
))
993 # Apply current variable settings to env
994 sticky_vars
.Update(env
)
996 help_texts
["local_vars"] += \
997 "Build variables for %s:\n" % variant_dir \
998 + sticky_vars
.GenerateHelpText(env
)
1000 # Process variable settings.
1002 if not have_fenv
and env
['USE_FENV']:
1003 print "Warning: <fenv.h> not available; " \
1004 "forcing USE_FENV to False in", variant_dir
+ "."
1005 env
['USE_FENV'] = False
1007 if not env
['USE_FENV']:
1008 print "Warning: No IEEE FP rounding mode control in", variant_dir
+ "."
1009 print " FP results may deviate slightly from other platforms."
1012 env
.Append(LIBS
=['efence'])
1014 # Save sticky variable settings back to current variables file
1015 sticky_vars
.Save(current_vars_file
, env
)
1018 env
.Append(CCFLAGS
=['-msse2'])
1020 # The src/SConscript file sets up the build rules in 'env' according
1021 # to the configured variables. It returns a list of environments,
1022 # one for each variant build (debug, opt, etc.)
1023 envList
= SConscript('src/SConscript', variant_dir
= variant_path
,
1026 # Set up the regression tests for each build.
1028 SConscript('tests/SConscript',
1029 variant_dir
= joinpath(variant_path
, 'tests', e
.Label
),
1030 exports
= { 'env' : e
}, duplicate
= False)
1034 Usage: scons [scons options] [build variables] [target(s)]
1036 Extra scons options:
1039 Global build variables: