1# -*- mode:python -*-
2
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
6# All rights reserved.
7#
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.
18#
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.
30#
31# Authors: Steve Reinhardt
32# Nathan Binkert
33
34###################################################
35#
36# SCons top-level build description (SConstruct) file.
37#
38# While in this directory ('m5'), 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_FS/m5.opt' for
41# the optimized full-system version).
42#
43# You can build M5 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.
47#
48# Examples:
49#
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>/m5 ; scons build/ALPHA_FS/m5.debug
53# % cd <path-to-src>/m5/build/ALPHA_FS; scons -u m5.debug
54#
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
58# file.
59# % cd <path-to-src>/m5 ; scons /local/foo/build/ALPHA_FS/m5.debug
60# % cd /local/foo/build/ALPHA_FS; scons -C <path-to-src>/m5 m5.debug
61#
62# You can use 'scons -H' to print scons options. If you're in this
63# 'm5' directory (or use -u or -C to tell scons where to find this
64# file), you can use 'scons -h' to print all the M5-specific build
65# options as well.
66#
67###################################################
68
69# Check for recent-enough Python and SCons versions.
70try:
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)
77except SystemExit, e:
78 print """
79For more details, see:
80 http://m5sim.org/wiki/index.php/Compiling_M5
81"""
82 raise
83
84# We ensure the python version early because we have stuff that
85# requires python 2.4
86try:
87 EnsurePythonVersion(2, 4)
88except SystemExit, e:
89 print """
90You can use a non-default installation of the Python interpreter by
91either (1) rearranging your PATH so that scons finds the non-default
92'python' first or (2) explicitly invoking an alternative interpreter
93on the scons script.
94
95For more details, see:
96 http://m5sim.org/wiki/index.php/Using_a_non-default_Python_installation
97"""
98 raise
99
100# Global Python includes
101import os
102import re
103import subprocess
104import sys
105
106from os import mkdir, environ
107from os.path import abspath, basename, dirname, expanduser, normpath
108from os.path import exists, isdir, isfile
109from os.path import join as joinpath, split as splitpath
110
111# SCons includes
112import SCons
113import SCons.Node
114
115extra_python_paths = [
116 Dir('src/python').srcnode().abspath, # M5 includes
117 Dir('ext/ply').srcnode().abspath, # ply is used by several files
118 ]
119
120sys.path[1:1] = extra_python_paths
121
122from m5.util import compareVersions, readCommand
123
124help_texts = {
125 "options" : "",
126 "global_vars" : "",
127 "local_vars" : ""
128}
129
130Export("help_texts")
131
132def AddM5Option(*args, **kwargs):
133 col_width = 30
134
135 help = " " + ", ".join(args)
136 if "help" in kwargs:
137 length = len(help)
138 if length >= col_width:
139 help += "\n" + " " * col_width
140 else:
141 help += " " * (col_width - length)
142 help += kwargs["help"]
143 help_texts["options"] += help + "\n"
144
145 AddOption(*args, **kwargs)
146
147AddM5Option('--colors', dest='use_colors', action='store_true',
148 help="Add color to abbreviated scons output")
149AddM5Option('--no-colors', dest='use_colors', action='store_false',
150 help="Don't add color to abbreviated scons output")
151AddM5Option('--default', dest='default', type='string', action='store',
152 help='Override which build_opts file to use for defaults')
153AddM5Option('--ignore-style', dest='ignore_style', action='store_true',
154 help='Disable style checking hooks')
155AddM5Option('--update-ref', dest='update_ref', action='store_true',
156 help='Update test reference outputs')
157AddM5Option('--verbose', dest='verbose', action='store_true',
158 help='Print full tool command lines')
159
160use_colors = GetOption('use_colors')
161if use_colors:
162 from m5.util.terminal import termcap
163elif use_colors is None:
164 # option unspecified; default behavior is to use colors iff isatty
165 from m5.util.terminal import tty_termcap as termcap
166else:
167 from m5.util.terminal import no_termcap as termcap
168
169########################################################################
170#
171# Set up the main build environment.
172#
173########################################################################
174use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
175 'PYTHONPATH', 'RANLIB' ])
176
177use_env = {}
178for key,val in os.environ.iteritems():
179 if key in use_vars or key.startswith("M5"):
180 use_env[key] = val
181
182main = Environment(ENV=use_env)
183main.root = Dir(".") # The current directory (where this file lives).
184main.srcdir = Dir("src") # The source directory
185
186# add useful python code PYTHONPATH so it can be used by subprocesses
187# as well
188main.AppendENVPath('PYTHONPATH', extra_python_paths)
189
190########################################################################
191#
192# Mercurial Stuff.
193#
194# If the M5 directory is a mercurial repository, we should do some
195# extra things.
196#
197########################################################################
198
199hgdir = main.root.Dir(".hg")
200
201mercurial_style_message = """
202You're missing the M5 style hook.
203Please install the hook so we can ensure that all code fits a common style.
204
205All you'd need to do is add the following lines to your repository .hg/hgrc
206or your personal .hgrc
207----------------
208
209[extensions]
210style = %s/util/style.py
211
212[hooks]
213pretxncommit.style = python:style.check_style
214pre-qrefresh.style = python:style.check_style
215""" % (main.root)
216
217mercurial_bin_not_found = """
218Mercurial binary cannot be found, unfortunately this means that we
219cannot easily determine the version of M5 that you are running and
220this makes error messages more difficult to collect. Please consider
221installing mercurial if you choose to post an error message
222"""
223
224mercurial_lib_not_found = """
225Mercurial libraries cannot be found, ignoring style hook
226If you are actually a M5 developer, please fix this and
227run the style hook. It is important.
228"""
229
230if hgdir.exists():
231 # Ensure that the style hook is in place.
232 try:
233 ui = None
234 if not GetOption('ignore_style'):
235 from mercurial import ui
236 ui = ui.ui()
237 except ImportError:
238 print mercurial_lib_not_found
239
240 if ui is not None:
241 ui.readconfig(hgdir.File('hgrc').abspath)
242 style_hook = ui.config('hooks', 'pretxncommit.style', None)
243
244 if not style_hook:
245 print mercurial_style_message
246 sys.exit(1)
247else:
248 print ".hg directory not found"
249
250###################################################
251#
252# Figure out which configurations to set up based on the path(s) of
253# the target(s).
254#
255###################################################
256
257# Find default configuration & binary.
258Default(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug'))
259
260# helper function: find last occurrence of element in list
261def rfind(l, elt, offs = -1):
262 for i in range(len(l)+offs, 0, -1):
263 if l[i] == elt:
264 return i
265 raise ValueError, "element not found"
266
267# Each target must have 'build' in the interior of the path; the
268# directory below this will determine the build parameters. For
269# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
270# recognize that ALPHA_SE specifies the configuration because it
271# follow 'build' in the bulid path.
272
273# Generate absolute paths to targets so we can see where the build dir is
274if COMMAND_LINE_TARGETS:
275 # Ask SCons which directory it was invoked from
276 launch_dir = GetLaunchDir()
277 # Make targets relative to invocation directory
278 abs_targets = [ normpath(joinpath(launch_dir, str(x))) for x in \
279 COMMAND_LINE_TARGETS]
280else:
281 # Default targets are relative to root of tree
282 abs_targets = [ normpath(joinpath(main.root.abspath, str(x))) for x in \
283 DEFAULT_TARGETS]
284
285
286# Generate a list of the unique build roots and configs that the
287# collected targets reference.
288variant_paths = []
289build_root = None
290for t in abs_targets:
291 path_dirs = t.split('/')
292 try:
293 build_top = rfind(path_dirs, 'build', -2)
294 except:
295 print "Error: no non-leaf 'build' dir found on target path", t
296 Exit(1)
297 this_build_root = joinpath('/',*path_dirs[:build_top+1])
298 if not build_root:
299 build_root = this_build_root
300 else:
301 if this_build_root != build_root:
302 print "Error: build targets not under same build root\n"\
303 " %s\n %s" % (build_root, this_build_root)
304 Exit(1)
305 variant_path = joinpath('/',*path_dirs[:build_top+2])
306 if variant_path not in variant_paths:
307 variant_paths.append(variant_path)
308
309# Make sure build_root exists (might not if this is the first build there)
310if not isdir(build_root):
311 mkdir(build_root)
312main['BUILDROOT'] = build_root
313
314Export('main')
315
316main.SConsignFile(joinpath(build_root, "sconsign"))
317
318# Default duplicate option is to use hard links, but this messes up
319# when you use emacs to edit a file in the target dir, as emacs moves
320# file to file~ then copies to file, breaking the link. Symbolic
321# (soft) links work better.
322main.SetOption('duplicate', 'soft-copy')
323
324#
325# Set up global sticky variables... these are common to an entire build
326# tree (not specific to a particular build like ALPHA_SE)
327#
328
329# Variable validators & converters for global sticky variables
330def PathListMakeAbsolute(val):
331 if not val:
332 return val
333 f = lambda p: abspath(expanduser(p))
334 return ':'.join(map(f, val.split(':')))
335
336def PathListAllExist(key, val, env):
337 if not val:
338 return
339 paths = val.split(':')
340 for path in paths:
341 if not isdir(path):
342 raise SCons.Errors.UserError("Path does not exist: '%s'" % path)
343
344global_vars_file = joinpath(build_root, 'variables.global')
345
346global_vars = Variables(global_vars_file, args=ARGUMENTS)
347
348global_vars.AddVariables(
349 ('CC', 'C compiler', environ.get('CC', main['CC'])),
350 ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])),
351 ('BATCH', 'Use batch pool for build and tests', False),
352 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
353 ('M5_BUILD_CACHE', 'Cache built objects in this directory', False),
354 ('EXTRAS', 'Add extra directories to the compilation', '',
355 PathListAllExist, PathListMakeAbsolute),
356 )
357
358# Update main environment with values from ARGUMENTS & global_vars_file
359global_vars.Update(main)
360help_texts["global_vars"] += global_vars.GenerateHelpText(main)
361
362# Save sticky variable settings back to current variables file
363global_vars.Save(global_vars_file, main)
364
365# Parse EXTRAS variable to build list of all directories where we're
366# look for sources etc. This list is exported as base_dir_list.
367base_dir = main.srcdir.abspath
368if main['EXTRAS']:
369 extras_dir_list = main['EXTRAS'].split(':')
370else:
371 extras_dir_list = []
372
373Export('base_dir')
374Export('extras_dir_list')
375
376# the ext directory should be on the #includes path
377main.Append(CPPPATH=[Dir('ext')])
378
379def strip_build_path(path, env):
380 path = str(path)
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/'):
385 path = path[6:]
386 return path
387
388# Generate a string of the form:
389# common/path/prefix/src1, src2 -> tgt1, tgt2
390# to print while building.
391class 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
398
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" \
405 + termcap.Normal
406 self.max_sources = max_sources
407
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]
411 def strip(f):
412 return strip_build_path(str(f), env)
413 if len(source) > 0:
414 srcs = map(strip, source)
415 else:
416 srcs = ['']
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)
422 if 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
430 pass
431 else:
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
436 pass
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(".")
441 if sep_idx != -1:
442 com_pfx = com_pfx[0:sep_idx]
443 else:
444 com_pfx = ''
445 elif src0_len > com_pfx_len and srcs[0][com_pfx_len] == ".":
446 # still splitting at file extension: ok
447 pass
448 else:
449 # probably a fluke; ignore it
450 com_pfx = ''
451 # recalculate length in case com_pfx was modified
452 com_pfx_len = len(com_pfx)
453 def fmt(files):
454 f = map(lambda s: s[com_pfx_len:], files)
455 return ', '.join(f)
456 return self.format % (com_pfx, fmt(srcs), fmt(tgts))
457
458Export('Transform')
459
460
461if GetOption('verbose'):
462 def MakeAction(action, string, *args, **kwargs):
463 return Action(action, *args, **kwargs)
464else:
465 MakeAction = Action
466 main['CCCOMSTR'] = Transform("CC")
467 main['CXXCOMSTR'] = Transform("CXX")
468 main['ASCOMSTR'] = Transform("AS")
469 main['SWIGCOMSTR'] = Transform("SWIG")
470 main['ARCOMSTR'] = Transform("AR", 0)
471 main['LINKCOMSTR'] = Transform("LINK", 0)
472 main['RANLIBCOMSTR'] = Transform("RANLIB", 0)
473 main['M4COMSTR'] = Transform("M4")
474 main['SHCCCOMSTR'] = Transform("SHCC")
475 main['SHCXXCOMSTR'] = Transform("SHCXX")
476Export('MakeAction')
477
478CXX_version = readCommand([main['CXX'],'--version'], exception=False)
479CXX_V = readCommand([main['CXX'],'-V'], exception=False)
480
481main['GCC'] = CXX_version and CXX_version.find('g++') >= 0
482main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
483main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
484if main['GCC'] + main['SUNCC'] + main['ICC'] > 1:
485 print 'Error: How can we have two at the same time?'
486 Exit(1)
487
488# Set up default C++ compiler flags
489if main['GCC']:
490 main.Append(CCFLAGS=['-pipe'])
491 main.Append(CCFLAGS=['-fno-strict-aliasing'])
492 main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
493 main.Append(CXXFLAGS=['-Wno-deprecated'])
494 # Read the GCC version to check for versions with bugs
495 # Note CCVERSION doesn't work here because it is run with the CC
496 # before we override it from the command line
497 gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
498 if not compareVersions(gcc_version, '4.4.1') or \
499 not compareVersions(gcc_version, '4.4.2'):
500 print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
501 main.Append(CCFLAGS=['-fno-tree-vectorize'])
502elif main['ICC']:
503 pass #Fix me... add warning flags once we clean up icc warnings
504elif main['SUNCC']:
505 main.Append(CCFLAGS=['-Qoption ccfe'])
506 main.Append(CCFLAGS=['-features=gcc'])
507 main.Append(CCFLAGS=['-features=extensions'])
508 main.Append(CCFLAGS=['-library=stlport4'])
509 main.Append(CCFLAGS=['-xar'])
510 #main.Append(CCFLAGS=['-instances=semiexplicit'])
511else:
512 print 'Error: Don\'t know what compiler options to use for your compiler.'
513 print ' Please fix SConstruct and src/SConscript and try again.'
514 Exit(1)
515
516# Set up common yacc/bison flags (needed for Ruby)
517main['YACCFLAGS'] = '-d'
518main['YACCHXXFILESUFFIX'] = '.hh'
519
520# Do this after we save setting back, or else we'll tack on an
521# extra 'qdo' every time we run scons.
522if main['BATCH']:
523 main['CC'] = main['BATCH_CMD'] + ' ' + main['CC']
524 main['CXX'] = main['BATCH_CMD'] + ' ' + main['CXX']
525 main['AS'] = main['BATCH_CMD'] + ' ' + main['AS']
526 main['AR'] = main['BATCH_CMD'] + ' ' + main['AR']
527 main['RANLIB'] = main['BATCH_CMD'] + ' ' + main['RANLIB']
528
529if sys.platform == 'cygwin':
530 # cygwin has some header file issues...
531 main.Append(CCFLAGS=["-Wno-uninitialized"])
532
533# Check for SWIG
534if not main.has_key('SWIG'):
535 print 'Error: SWIG utility not found.'
536 print ' Please install (see http://www.swig.org) and retry.'
537 Exit(1)
538
539# Check for appropriate SWIG version
540swig_version = readCommand(('swig', '-version'), exception='').split()
541# First 3 words should be "SWIG Version x.y.z"
542if len(swig_version) < 3 or \
543 swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
544 print 'Error determining SWIG version.'
545 Exit(1)
546
547min_swig_version = '1.3.28'
548if compareVersions(swig_version[2], min_swig_version) < 0:
549 print 'Error: SWIG version', min_swig_version, 'or newer required.'
550 print ' Installed version:', swig_version[2]
551 Exit(1)
552
553# Set up SWIG flags & scanner
554swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
555main.Append(SWIGFLAGS=swig_flags)
556
557# filter out all existing swig scanners, they mess up the dependency
558# stuff for some reason
559scanners = []
560for scanner in main['SCANNERS']:
561 skeys = scanner.skeys
562 if skeys == '.i':
563 continue
564
565 if isinstance(skeys, (list, tuple)) and '.i' in skeys:
566 continue
567
568 scanners.append(scanner)
569
570# add the new swig scanner that we like better
571from SCons.Scanner import ClassicCPP as CPPScanner
572swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
573scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
574
575# replace the scanners list that has what we want
576main['SCANNERS'] = scanners
577
578# Add a custom Check function to the Configure context so that we can
579# figure out if the compiler adds leading underscores to global
580# variables. This is needed for the autogenerated asm files that we
581# use for embedding the python code.
582def CheckLeading(context):
583 context.Message("Checking for leading underscore in global variables...")
584 # 1) Define a global variable called x from asm so the C compiler
585 # won't change the symbol at all.
586 # 2) Declare that variable.
587 # 3) Use the variable
588 #
589 # If the compiler prepends an underscore, this will successfully
590 # link because the external symbol 'x' will be called '_x' which
591 # was defined by the asm statement. If the compiler does not
592 # prepend an underscore, this will not successfully link because
593 # '_x' will have been defined by assembly, while the C portion of
594 # the code will be trying to use 'x'
595 ret = context.TryLink('''
596 asm(".globl _x; _x: .byte 0");
597 extern int x;
598 int main() { return x; }
599 ''', extension=".c")
600 context.env.Append(LEADING_UNDERSCORE=ret)
601 context.Result(ret)
602 return ret
603
604# Platform-specific configuration. Note again that we assume that all
605# builds under a given build root run on the same host platform.
606conf = Configure(main,
607 conf_dir = joinpath(build_root, '.scons_config'),
608 log_file = joinpath(build_root, 'scons_config.log'),
609 custom_tests = { 'CheckLeading' : CheckLeading })
610
611# Check for leading underscores. Don't really need to worry either
612# way so don't need to check the return code.
613conf.CheckLeading()
614
615# Check if we should compile a 64 bit binary on Mac OS X/Darwin
616try:
617 import platform
618 uname = platform.uname()
619 if uname[0] == 'Darwin' and compareVersions(uname[2], '9.0.0') >= 0:
620 if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]):
621 main.Append(CCFLAGS=['-arch', 'x86_64'])
622 main.Append(CFLAGS=['-arch', 'x86_64'])
623 main.Append(LINKFLAGS=['-arch', 'x86_64'])
624 main.Append(ASFLAGS=['-arch', 'x86_64'])
625except:
626 pass
627
628# Recent versions of scons substitute a "Null" object for Configure()
629# when configuration isn't necessary, e.g., if the "--help" option is
630# present. Unfortuantely this Null object always returns false,
631# breaking all our configuration checks. We replace it with our own
632# more optimistic null object that returns True instead.
633if not conf:
634 def NullCheck(*args, **kwargs):
635 return True
636
637 class NullConf:
638 def __init__(self, env):
639 self.env = env
640 def Finish(self):
641 return self.env
642 def __getattr__(self, mname):
643 return NullCheck
644
645 conf = NullConf(main)
646
647# Find Python include and library directories for embedding the
648# interpreter. For consistency, we will use the same Python
649# installation used to run scons (and thus this script). If you want
650# to link in an alternate version, see above for instructions on how
651# to invoke scons with a different copy of the Python interpreter.
652from distutils import sysconfig
653
654py_getvar = sysconfig.get_config_var
655
656py_debug = getattr(sys, 'pydebug', False)
657py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
658
659py_general_include = sysconfig.get_python_inc()
660py_platform_include = sysconfig.get_python_inc(plat_specific=True)
661py_includes = [ py_general_include ]
662if py_platform_include != py_general_include:
663 py_includes.append(py_platform_include)
664
665py_lib_path = [ py_getvar('LIBDIR') ]
666# add the prefix/lib/pythonX.Y/config dir, but only if there is no
667# shared library in prefix/lib/.
668if not py_getvar('Py_ENABLE_SHARED'):
669 py_lib_path.append(py_getvar('LIBPL'))
670
671py_libs = []
672for lib in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split():
673 assert lib.startswith('-l')
674 lib = lib[2:]
675 if lib not in py_libs:
676 py_libs.append(lib)
677py_libs.append(py_version)
678
679main.Append(CPPPATH=py_includes)
680main.Append(LIBPATH=py_lib_path)
681
682# Cache build files in the supplied directory.
683if main['M5_BUILD_CACHE']:
684 print 'Using build cache located at', main['M5_BUILD_CACHE']
685 CacheDir(main['M5_BUILD_CACHE'])
686
687
688# verify that this stuff works
689if not conf.CheckHeader('Python.h', '<>'):
690 print "Error: can't find Python.h header in", py_includes
691 Exit(1)
692
693for lib in py_libs:
694 if not conf.CheckLib(lib):
695 print "Error: can't find library %s required by python" % lib
696 Exit(1)
697
698# On Solaris you need to use libsocket for socket ops
699if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
700 if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
701 print "Can't find library with socket calls (e.g. accept())"
702 Exit(1)
703
704# Check for zlib. If the check passes, libz will be automatically
705# added to the LIBS environment variable.
706if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'):
707 print 'Error: did not find needed zlib compression library '\
708 'and/or zlib.h header file.'
709 print ' Please install zlib and try again.'
710 Exit(1)
711
712# Check for librt.
713have_posix_clock = \
714 conf.CheckLibWithHeader(None, 'time.h', 'C',
715 'clock_nanosleep(0,0,NULL,NULL);') or \
716 conf.CheckLibWithHeader('rt', 'time.h', 'C',
717 'clock_nanosleep(0,0,NULL,NULL);')
718
719if not have_posix_clock:
720 print "Can't find library for POSIX clocks."
721
722# Check for <fenv.h> (C99 FP environment control)
723have_fenv = conf.CheckHeader('fenv.h', '<>')
724if not have_fenv:
725 print "Warning: Header file <fenv.h> not found."
726 print " This host has no IEEE FP rounding mode control."
727
728######################################################################
729#
730# Check for mysql.
731#
732mysql_config = WhereIs('mysql_config')
733have_mysql = bool(mysql_config)
734
735# Check MySQL version.
736if have_mysql:
737 mysql_version = readCommand(mysql_config + ' --version')
738 min_mysql_version = '4.1'
739 if compareVersions(mysql_version, min_mysql_version) < 0:
740 print 'Warning: MySQL', min_mysql_version, 'or newer required.'
741 print ' Version', mysql_version, 'detected.'
742 have_mysql = False
743
744# Set up mysql_config commands.
745if have_mysql:
746 mysql_config_include = mysql_config + ' --include'
747 if os.system(mysql_config_include + ' > /dev/null') != 0:
748 # older mysql_config versions don't support --include, use
749 # --cflags instead
750 mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
751 # This seems to work in all versions
752 mysql_config_libs = mysql_config + ' --libs'
753
754######################################################################
755#
756# Finish the configuration
757#
758main = conf.Finish()
759
760######################################################################
761#
762# Collect all non-global variables
763#
764
765# Define the universe of supported ISAs
766all_isa_list = [ ]
767Export('all_isa_list')
768
769class CpuModel(object):
770 '''The CpuModel class encapsulates everything the ISA parser needs to
771 know about a particular CPU model.'''
772
773 # Dict of available CPU model objects. Accessible as CpuModel.dict.
774 dict = {}
775 list = []
776 defaults = []
777
778 # Constructor. Automatically adds models to CpuModel.dict.
779 def __init__(self, name, filename, includes, strings, default=False):
780 self.name = name # name of model
781 self.filename = filename # filename for output exec code
782 self.includes = includes # include files needed in exec file
783 # The 'strings' dict holds all the per-CPU symbols we can
784 # substitute into templates etc.
785 self.strings = strings
786
787 # This cpu is enabled by default
788 self.default = default
789
790 # Add self to dict
791 if name in CpuModel.dict:
792 raise AttributeError, "CpuModel '%s' already registered" % name
793 CpuModel.dict[name] = self
794 CpuModel.list.append(name)
795
796Export('CpuModel')
797
798# Sticky variables get saved in the variables file so they persist from
799# one invocation to the next (unless overridden, in which case the new
800# value becomes sticky).
801sticky_vars = Variables(args=ARGUMENTS)
802Export('sticky_vars')
803
804# Sticky variables that should be exported
805export_vars = []
806Export('export_vars')
807
808# Walk the tree and execute all SConsopts scripts that wil add to the
809# above variables
810for bdir in [ base_dir ] + extras_dir_list:
811 for root, dirs, files in os.walk(bdir):
812 if 'SConsopts' in files:
813 print "Reading", joinpath(root, 'SConsopts')
814 SConscript(joinpath(root, 'SConsopts'))
815
816all_isa_list.sort()
817
818sticky_vars.AddVariables(
819 EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list),
820 BoolVariable('FULL_SYSTEM', 'Full-system support', False),
821 ListVariable('CPU_MODELS', 'CPU models',
822 sorted(n for n,m in CpuModel.dict.iteritems() if m.default),
823 sorted(CpuModel.list)),
824 BoolVariable('NO_FAST_ALLOC', 'Disable fast object allocator', False),
| 1# -*- mode:python -*-
2
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
6# All rights reserved.
7#
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.
18#
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.
30#
31# Authors: Steve Reinhardt
32# Nathan Binkert
33
34###################################################
35#
36# SCons top-level build description (SConstruct) file.
37#
38# While in this directory ('m5'), 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_FS/m5.opt' for
41# the optimized full-system version).
42#
43# You can build M5 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.
47#
48# Examples:
49#
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>/m5 ; scons build/ALPHA_FS/m5.debug
53# % cd <path-to-src>/m5/build/ALPHA_FS; scons -u m5.debug
54#
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
58# file.
59# % cd <path-to-src>/m5 ; scons /local/foo/build/ALPHA_FS/m5.debug
60# % cd /local/foo/build/ALPHA_FS; scons -C <path-to-src>/m5 m5.debug
61#
62# You can use 'scons -H' to print scons options. If you're in this
63# 'm5' directory (or use -u or -C to tell scons where to find this
64# file), you can use 'scons -h' to print all the M5-specific build
65# options as well.
66#
67###################################################
68
69# Check for recent-enough Python and SCons versions.
70try:
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)
77except SystemExit, e:
78 print """
79For more details, see:
80 http://m5sim.org/wiki/index.php/Compiling_M5
81"""
82 raise
83
84# We ensure the python version early because we have stuff that
85# requires python 2.4
86try:
87 EnsurePythonVersion(2, 4)
88except SystemExit, e:
89 print """
90You can use a non-default installation of the Python interpreter by
91either (1) rearranging your PATH so that scons finds the non-default
92'python' first or (2) explicitly invoking an alternative interpreter
93on the scons script.
94
95For more details, see:
96 http://m5sim.org/wiki/index.php/Using_a_non-default_Python_installation
97"""
98 raise
99
100# Global Python includes
101import os
102import re
103import subprocess
104import sys
105
106from os import mkdir, environ
107from os.path import abspath, basename, dirname, expanduser, normpath
108from os.path import exists, isdir, isfile
109from os.path import join as joinpath, split as splitpath
110
111# SCons includes
112import SCons
113import SCons.Node
114
115extra_python_paths = [
116 Dir('src/python').srcnode().abspath, # M5 includes
117 Dir('ext/ply').srcnode().abspath, # ply is used by several files
118 ]
119
120sys.path[1:1] = extra_python_paths
121
122from m5.util import compareVersions, readCommand
123
124help_texts = {
125 "options" : "",
126 "global_vars" : "",
127 "local_vars" : ""
128}
129
130Export("help_texts")
131
132def AddM5Option(*args, **kwargs):
133 col_width = 30
134
135 help = " " + ", ".join(args)
136 if "help" in kwargs:
137 length = len(help)
138 if length >= col_width:
139 help += "\n" + " " * col_width
140 else:
141 help += " " * (col_width - length)
142 help += kwargs["help"]
143 help_texts["options"] += help + "\n"
144
145 AddOption(*args, **kwargs)
146
147AddM5Option('--colors', dest='use_colors', action='store_true',
148 help="Add color to abbreviated scons output")
149AddM5Option('--no-colors', dest='use_colors', action='store_false',
150 help="Don't add color to abbreviated scons output")
151AddM5Option('--default', dest='default', type='string', action='store',
152 help='Override which build_opts file to use for defaults')
153AddM5Option('--ignore-style', dest='ignore_style', action='store_true',
154 help='Disable style checking hooks')
155AddM5Option('--update-ref', dest='update_ref', action='store_true',
156 help='Update test reference outputs')
157AddM5Option('--verbose', dest='verbose', action='store_true',
158 help='Print full tool command lines')
159
160use_colors = GetOption('use_colors')
161if use_colors:
162 from m5.util.terminal import termcap
163elif use_colors is None:
164 # option unspecified; default behavior is to use colors iff isatty
165 from m5.util.terminal import tty_termcap as termcap
166else:
167 from m5.util.terminal import no_termcap as termcap
168
169########################################################################
170#
171# Set up the main build environment.
172#
173########################################################################
174use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
175 'PYTHONPATH', 'RANLIB' ])
176
177use_env = {}
178for key,val in os.environ.iteritems():
179 if key in use_vars or key.startswith("M5"):
180 use_env[key] = val
181
182main = Environment(ENV=use_env)
183main.root = Dir(".") # The current directory (where this file lives).
184main.srcdir = Dir("src") # The source directory
185
186# add useful python code PYTHONPATH so it can be used by subprocesses
187# as well
188main.AppendENVPath('PYTHONPATH', extra_python_paths)
189
190########################################################################
191#
192# Mercurial Stuff.
193#
194# If the M5 directory is a mercurial repository, we should do some
195# extra things.
196#
197########################################################################
198
199hgdir = main.root.Dir(".hg")
200
201mercurial_style_message = """
202You're missing the M5 style hook.
203Please install the hook so we can ensure that all code fits a common style.
204
205All you'd need to do is add the following lines to your repository .hg/hgrc
206or your personal .hgrc
207----------------
208
209[extensions]
210style = %s/util/style.py
211
212[hooks]
213pretxncommit.style = python:style.check_style
214pre-qrefresh.style = python:style.check_style
215""" % (main.root)
216
217mercurial_bin_not_found = """
218Mercurial binary cannot be found, unfortunately this means that we
219cannot easily determine the version of M5 that you are running and
220this makes error messages more difficult to collect. Please consider
221installing mercurial if you choose to post an error message
222"""
223
224mercurial_lib_not_found = """
225Mercurial libraries cannot be found, ignoring style hook
226If you are actually a M5 developer, please fix this and
227run the style hook. It is important.
228"""
229
230if hgdir.exists():
231 # Ensure that the style hook is in place.
232 try:
233 ui = None
234 if not GetOption('ignore_style'):
235 from mercurial import ui
236 ui = ui.ui()
237 except ImportError:
238 print mercurial_lib_not_found
239
240 if ui is not None:
241 ui.readconfig(hgdir.File('hgrc').abspath)
242 style_hook = ui.config('hooks', 'pretxncommit.style', None)
243
244 if not style_hook:
245 print mercurial_style_message
246 sys.exit(1)
247else:
248 print ".hg directory not found"
249
250###################################################
251#
252# Figure out which configurations to set up based on the path(s) of
253# the target(s).
254#
255###################################################
256
257# Find default configuration & binary.
258Default(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA_SE/m5.debug'))
259
260# helper function: find last occurrence of element in list
261def rfind(l, elt, offs = -1):
262 for i in range(len(l)+offs, 0, -1):
263 if l[i] == elt:
264 return i
265 raise ValueError, "element not found"
266
267# Each target must have 'build' in the interior of the path; the
268# directory below this will determine the build parameters. For
269# example, for target 'foo/bar/build/ALPHA_SE/arch/alpha/blah.do' we
270# recognize that ALPHA_SE specifies the configuration because it
271# follow 'build' in the bulid path.
272
273# Generate absolute paths to targets so we can see where the build dir is
274if COMMAND_LINE_TARGETS:
275 # Ask SCons which directory it was invoked from
276 launch_dir = GetLaunchDir()
277 # Make targets relative to invocation directory
278 abs_targets = [ normpath(joinpath(launch_dir, str(x))) for x in \
279 COMMAND_LINE_TARGETS]
280else:
281 # Default targets are relative to root of tree
282 abs_targets = [ normpath(joinpath(main.root.abspath, str(x))) for x in \
283 DEFAULT_TARGETS]
284
285
286# Generate a list of the unique build roots and configs that the
287# collected targets reference.
288variant_paths = []
289build_root = None
290for t in abs_targets:
291 path_dirs = t.split('/')
292 try:
293 build_top = rfind(path_dirs, 'build', -2)
294 except:
295 print "Error: no non-leaf 'build' dir found on target path", t
296 Exit(1)
297 this_build_root = joinpath('/',*path_dirs[:build_top+1])
298 if not build_root:
299 build_root = this_build_root
300 else:
301 if this_build_root != build_root:
302 print "Error: build targets not under same build root\n"\
303 " %s\n %s" % (build_root, this_build_root)
304 Exit(1)
305 variant_path = joinpath('/',*path_dirs[:build_top+2])
306 if variant_path not in variant_paths:
307 variant_paths.append(variant_path)
308
309# Make sure build_root exists (might not if this is the first build there)
310if not isdir(build_root):
311 mkdir(build_root)
312main['BUILDROOT'] = build_root
313
314Export('main')
315
316main.SConsignFile(joinpath(build_root, "sconsign"))
317
318# Default duplicate option is to use hard links, but this messes up
319# when you use emacs to edit a file in the target dir, as emacs moves
320# file to file~ then copies to file, breaking the link. Symbolic
321# (soft) links work better.
322main.SetOption('duplicate', 'soft-copy')
323
324#
325# Set up global sticky variables... these are common to an entire build
326# tree (not specific to a particular build like ALPHA_SE)
327#
328
329# Variable validators & converters for global sticky variables
330def PathListMakeAbsolute(val):
331 if not val:
332 return val
333 f = lambda p: abspath(expanduser(p))
334 return ':'.join(map(f, val.split(':')))
335
336def PathListAllExist(key, val, env):
337 if not val:
338 return
339 paths = val.split(':')
340 for path in paths:
341 if not isdir(path):
342 raise SCons.Errors.UserError("Path does not exist: '%s'" % path)
343
344global_vars_file = joinpath(build_root, 'variables.global')
345
346global_vars = Variables(global_vars_file, args=ARGUMENTS)
347
348global_vars.AddVariables(
349 ('CC', 'C compiler', environ.get('CC', main['CC'])),
350 ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])),
351 ('BATCH', 'Use batch pool for build and tests', False),
352 ('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
353 ('M5_BUILD_CACHE', 'Cache built objects in this directory', False),
354 ('EXTRAS', 'Add extra directories to the compilation', '',
355 PathListAllExist, PathListMakeAbsolute),
356 )
357
358# Update main environment with values from ARGUMENTS & global_vars_file
359global_vars.Update(main)
360help_texts["global_vars"] += global_vars.GenerateHelpText(main)
361
362# Save sticky variable settings back to current variables file
363global_vars.Save(global_vars_file, main)
364
365# Parse EXTRAS variable to build list of all directories where we're
366# look for sources etc. This list is exported as base_dir_list.
367base_dir = main.srcdir.abspath
368if main['EXTRAS']:
369 extras_dir_list = main['EXTRAS'].split(':')
370else:
371 extras_dir_list = []
372
373Export('base_dir')
374Export('extras_dir_list')
375
376# the ext directory should be on the #includes path
377main.Append(CPPPATH=[Dir('ext')])
378
379def strip_build_path(path, env):
380 path = str(path)
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/'):
385 path = path[6:]
386 return path
387
388# Generate a string of the form:
389# common/path/prefix/src1, src2 -> tgt1, tgt2
390# to print while building.
391class 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
398
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" \
405 + termcap.Normal
406 self.max_sources = max_sources
407
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]
411 def strip(f):
412 return strip_build_path(str(f), env)
413 if len(source) > 0:
414 srcs = map(strip, source)
415 else:
416 srcs = ['']
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)
422 if 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
430 pass
431 else:
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
436 pass
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(".")
441 if sep_idx != -1:
442 com_pfx = com_pfx[0:sep_idx]
443 else:
444 com_pfx = ''
445 elif src0_len > com_pfx_len and srcs[0][com_pfx_len] == ".":
446 # still splitting at file extension: ok
447 pass
448 else:
449 # probably a fluke; ignore it
450 com_pfx = ''
451 # recalculate length in case com_pfx was modified
452 com_pfx_len = len(com_pfx)
453 def fmt(files):
454 f = map(lambda s: s[com_pfx_len:], files)
455 return ', '.join(f)
456 return self.format % (com_pfx, fmt(srcs), fmt(tgts))
457
458Export('Transform')
459
460
461if GetOption('verbose'):
462 def MakeAction(action, string, *args, **kwargs):
463 return Action(action, *args, **kwargs)
464else:
465 MakeAction = Action
466 main['CCCOMSTR'] = Transform("CC")
467 main['CXXCOMSTR'] = Transform("CXX")
468 main['ASCOMSTR'] = Transform("AS")
469 main['SWIGCOMSTR'] = Transform("SWIG")
470 main['ARCOMSTR'] = Transform("AR", 0)
471 main['LINKCOMSTR'] = Transform("LINK", 0)
472 main['RANLIBCOMSTR'] = Transform("RANLIB", 0)
473 main['M4COMSTR'] = Transform("M4")
474 main['SHCCCOMSTR'] = Transform("SHCC")
475 main['SHCXXCOMSTR'] = Transform("SHCXX")
476Export('MakeAction')
477
478CXX_version = readCommand([main['CXX'],'--version'], exception=False)
479CXX_V = readCommand([main['CXX'],'-V'], exception=False)
480
481main['GCC'] = CXX_version and CXX_version.find('g++') >= 0
482main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
483main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
484if main['GCC'] + main['SUNCC'] + main['ICC'] > 1:
485 print 'Error: How can we have two at the same time?'
486 Exit(1)
487
488# Set up default C++ compiler flags
489if main['GCC']:
490 main.Append(CCFLAGS=['-pipe'])
491 main.Append(CCFLAGS=['-fno-strict-aliasing'])
492 main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
493 main.Append(CXXFLAGS=['-Wno-deprecated'])
494 # Read the GCC version to check for versions with bugs
495 # Note CCVERSION doesn't work here because it is run with the CC
496 # before we override it from the command line
497 gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
498 if not compareVersions(gcc_version, '4.4.1') or \
499 not compareVersions(gcc_version, '4.4.2'):
500 print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
501 main.Append(CCFLAGS=['-fno-tree-vectorize'])
502elif main['ICC']:
503 pass #Fix me... add warning flags once we clean up icc warnings
504elif main['SUNCC']:
505 main.Append(CCFLAGS=['-Qoption ccfe'])
506 main.Append(CCFLAGS=['-features=gcc'])
507 main.Append(CCFLAGS=['-features=extensions'])
508 main.Append(CCFLAGS=['-library=stlport4'])
509 main.Append(CCFLAGS=['-xar'])
510 #main.Append(CCFLAGS=['-instances=semiexplicit'])
511else:
512 print 'Error: Don\'t know what compiler options to use for your compiler.'
513 print ' Please fix SConstruct and src/SConscript and try again.'
514 Exit(1)
515
516# Set up common yacc/bison flags (needed for Ruby)
517main['YACCFLAGS'] = '-d'
518main['YACCHXXFILESUFFIX'] = '.hh'
519
520# Do this after we save setting back, or else we'll tack on an
521# extra 'qdo' every time we run scons.
522if main['BATCH']:
523 main['CC'] = main['BATCH_CMD'] + ' ' + main['CC']
524 main['CXX'] = main['BATCH_CMD'] + ' ' + main['CXX']
525 main['AS'] = main['BATCH_CMD'] + ' ' + main['AS']
526 main['AR'] = main['BATCH_CMD'] + ' ' + main['AR']
527 main['RANLIB'] = main['BATCH_CMD'] + ' ' + main['RANLIB']
528
529if sys.platform == 'cygwin':
530 # cygwin has some header file issues...
531 main.Append(CCFLAGS=["-Wno-uninitialized"])
532
533# Check for SWIG
534if not main.has_key('SWIG'):
535 print 'Error: SWIG utility not found.'
536 print ' Please install (see http://www.swig.org) and retry.'
537 Exit(1)
538
539# Check for appropriate SWIG version
540swig_version = readCommand(('swig', '-version'), exception='').split()
541# First 3 words should be "SWIG Version x.y.z"
542if len(swig_version) < 3 or \
543 swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
544 print 'Error determining SWIG version.'
545 Exit(1)
546
547min_swig_version = '1.3.28'
548if compareVersions(swig_version[2], min_swig_version) < 0:
549 print 'Error: SWIG version', min_swig_version, 'or newer required.'
550 print ' Installed version:', swig_version[2]
551 Exit(1)
552
553# Set up SWIG flags & scanner
554swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
555main.Append(SWIGFLAGS=swig_flags)
556
557# filter out all existing swig scanners, they mess up the dependency
558# stuff for some reason
559scanners = []
560for scanner in main['SCANNERS']:
561 skeys = scanner.skeys
562 if skeys == '.i':
563 continue
564
565 if isinstance(skeys, (list, tuple)) and '.i' in skeys:
566 continue
567
568 scanners.append(scanner)
569
570# add the new swig scanner that we like better
571from SCons.Scanner import ClassicCPP as CPPScanner
572swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
573scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
574
575# replace the scanners list that has what we want
576main['SCANNERS'] = scanners
577
578# Add a custom Check function to the Configure context so that we can
579# figure out if the compiler adds leading underscores to global
580# variables. This is needed for the autogenerated asm files that we
581# use for embedding the python code.
582def CheckLeading(context):
583 context.Message("Checking for leading underscore in global variables...")
584 # 1) Define a global variable called x from asm so the C compiler
585 # won't change the symbol at all.
586 # 2) Declare that variable.
587 # 3) Use the variable
588 #
589 # If the compiler prepends an underscore, this will successfully
590 # link because the external symbol 'x' will be called '_x' which
591 # was defined by the asm statement. If the compiler does not
592 # prepend an underscore, this will not successfully link because
593 # '_x' will have been defined by assembly, while the C portion of
594 # the code will be trying to use 'x'
595 ret = context.TryLink('''
596 asm(".globl _x; _x: .byte 0");
597 extern int x;
598 int main() { return x; }
599 ''', extension=".c")
600 context.env.Append(LEADING_UNDERSCORE=ret)
601 context.Result(ret)
602 return ret
603
604# Platform-specific configuration. Note again that we assume that all
605# builds under a given build root run on the same host platform.
606conf = Configure(main,
607 conf_dir = joinpath(build_root, '.scons_config'),
608 log_file = joinpath(build_root, 'scons_config.log'),
609 custom_tests = { 'CheckLeading' : CheckLeading })
610
611# Check for leading underscores. Don't really need to worry either
612# way so don't need to check the return code.
613conf.CheckLeading()
614
615# Check if we should compile a 64 bit binary on Mac OS X/Darwin
616try:
617 import platform
618 uname = platform.uname()
619 if uname[0] == 'Darwin' and compareVersions(uname[2], '9.0.0') >= 0:
620 if int(readCommand('sysctl -n hw.cpu64bit_capable')[0]):
621 main.Append(CCFLAGS=['-arch', 'x86_64'])
622 main.Append(CFLAGS=['-arch', 'x86_64'])
623 main.Append(LINKFLAGS=['-arch', 'x86_64'])
624 main.Append(ASFLAGS=['-arch', 'x86_64'])
625except:
626 pass
627
628# Recent versions of scons substitute a "Null" object for Configure()
629# when configuration isn't necessary, e.g., if the "--help" option is
630# present. Unfortuantely this Null object always returns false,
631# breaking all our configuration checks. We replace it with our own
632# more optimistic null object that returns True instead.
633if not conf:
634 def NullCheck(*args, **kwargs):
635 return True
636
637 class NullConf:
638 def __init__(self, env):
639 self.env = env
640 def Finish(self):
641 return self.env
642 def __getattr__(self, mname):
643 return NullCheck
644
645 conf = NullConf(main)
646
647# Find Python include and library directories for embedding the
648# interpreter. For consistency, we will use the same Python
649# installation used to run scons (and thus this script). If you want
650# to link in an alternate version, see above for instructions on how
651# to invoke scons with a different copy of the Python interpreter.
652from distutils import sysconfig
653
654py_getvar = sysconfig.get_config_var
655
656py_debug = getattr(sys, 'pydebug', False)
657py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
658
659py_general_include = sysconfig.get_python_inc()
660py_platform_include = sysconfig.get_python_inc(plat_specific=True)
661py_includes = [ py_general_include ]
662if py_platform_include != py_general_include:
663 py_includes.append(py_platform_include)
664
665py_lib_path = [ py_getvar('LIBDIR') ]
666# add the prefix/lib/pythonX.Y/config dir, but only if there is no
667# shared library in prefix/lib/.
668if not py_getvar('Py_ENABLE_SHARED'):
669 py_lib_path.append(py_getvar('LIBPL'))
670
671py_libs = []
672for lib in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split():
673 assert lib.startswith('-l')
674 lib = lib[2:]
675 if lib not in py_libs:
676 py_libs.append(lib)
677py_libs.append(py_version)
678
679main.Append(CPPPATH=py_includes)
680main.Append(LIBPATH=py_lib_path)
681
682# Cache build files in the supplied directory.
683if main['M5_BUILD_CACHE']:
684 print 'Using build cache located at', main['M5_BUILD_CACHE']
685 CacheDir(main['M5_BUILD_CACHE'])
686
687
688# verify that this stuff works
689if not conf.CheckHeader('Python.h', '<>'):
690 print "Error: can't find Python.h header in", py_includes
691 Exit(1)
692
693for lib in py_libs:
694 if not conf.CheckLib(lib):
695 print "Error: can't find library %s required by python" % lib
696 Exit(1)
697
698# On Solaris you need to use libsocket for socket ops
699if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
700 if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
701 print "Can't find library with socket calls (e.g. accept())"
702 Exit(1)
703
704# Check for zlib. If the check passes, libz will be automatically
705# added to the LIBS environment variable.
706if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'):
707 print 'Error: did not find needed zlib compression library '\
708 'and/or zlib.h header file.'
709 print ' Please install zlib and try again.'
710 Exit(1)
711
712# Check for librt.
713have_posix_clock = \
714 conf.CheckLibWithHeader(None, 'time.h', 'C',
715 'clock_nanosleep(0,0,NULL,NULL);') or \
716 conf.CheckLibWithHeader('rt', 'time.h', 'C',
717 'clock_nanosleep(0,0,NULL,NULL);')
718
719if not have_posix_clock:
720 print "Can't find library for POSIX clocks."
721
722# Check for <fenv.h> (C99 FP environment control)
723have_fenv = conf.CheckHeader('fenv.h', '<>')
724if not have_fenv:
725 print "Warning: Header file <fenv.h> not found."
726 print " This host has no IEEE FP rounding mode control."
727
728######################################################################
729#
730# Check for mysql.
731#
732mysql_config = WhereIs('mysql_config')
733have_mysql = bool(mysql_config)
734
735# Check MySQL version.
736if have_mysql:
737 mysql_version = readCommand(mysql_config + ' --version')
738 min_mysql_version = '4.1'
739 if compareVersions(mysql_version, min_mysql_version) < 0:
740 print 'Warning: MySQL', min_mysql_version, 'or newer required.'
741 print ' Version', mysql_version, 'detected.'
742 have_mysql = False
743
744# Set up mysql_config commands.
745if have_mysql:
746 mysql_config_include = mysql_config + ' --include'
747 if os.system(mysql_config_include + ' > /dev/null') != 0:
748 # older mysql_config versions don't support --include, use
749 # --cflags instead
750 mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
751 # This seems to work in all versions
752 mysql_config_libs = mysql_config + ' --libs'
753
754######################################################################
755#
756# Finish the configuration
757#
758main = conf.Finish()
759
760######################################################################
761#
762# Collect all non-global variables
763#
764
765# Define the universe of supported ISAs
766all_isa_list = [ ]
767Export('all_isa_list')
768
769class CpuModel(object):
770 '''The CpuModel class encapsulates everything the ISA parser needs to
771 know about a particular CPU model.'''
772
773 # Dict of available CPU model objects. Accessible as CpuModel.dict.
774 dict = {}
775 list = []
776 defaults = []
777
778 # Constructor. Automatically adds models to CpuModel.dict.
779 def __init__(self, name, filename, includes, strings, default=False):
780 self.name = name # name of model
781 self.filename = filename # filename for output exec code
782 self.includes = includes # include files needed in exec file
783 # The 'strings' dict holds all the per-CPU symbols we can
784 # substitute into templates etc.
785 self.strings = strings
786
787 # This cpu is enabled by default
788 self.default = default
789
790 # Add self to dict
791 if name in CpuModel.dict:
792 raise AttributeError, "CpuModel '%s' already registered" % name
793 CpuModel.dict[name] = self
794 CpuModel.list.append(name)
795
796Export('CpuModel')
797
798# Sticky variables get saved in the variables file so they persist from
799# one invocation to the next (unless overridden, in which case the new
800# value becomes sticky).
801sticky_vars = Variables(args=ARGUMENTS)
802Export('sticky_vars')
803
804# Sticky variables that should be exported
805export_vars = []
806Export('export_vars')
807
808# Walk the tree and execute all SConsopts scripts that wil add to the
809# above variables
810for bdir in [ base_dir ] + extras_dir_list:
811 for root, dirs, files in os.walk(bdir):
812 if 'SConsopts' in files:
813 print "Reading", joinpath(root, 'SConsopts')
814 SConscript(joinpath(root, 'SConsopts'))
815
816all_isa_list.sort()
817
818sticky_vars.AddVariables(
819 EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list),
820 BoolVariable('FULL_SYSTEM', 'Full-system support', False),
821 ListVariable('CPU_MODELS', 'CPU models',
822 sorted(n for n,m in CpuModel.dict.iteritems() if m.default),
823 sorted(CpuModel.list)),
824 BoolVariable('NO_FAST_ALLOC', 'Disable fast object allocator', False),
|
848 'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE',
849 'USE_POSIX_CLOCK' ]
850
851###################################################
852#
853# Define a SCons builder for configuration flag headers.
854#
855###################################################
856
857# This function generates a config header file that #defines the
858# variable symbol to the current variable setting (0 or 1). The source
859# operands are the name of the variable and a Value node containing the
860# value of the variable.
861def build_config_file(target, source, env):
862 (variable, value) = [s.get_contents() for s in source]
863 f = file(str(target[0]), 'w')
864 print >> f, '#define', variable, value
865 f.close()
866 return None
867
868# Generate the message to be printed when building the config file.
869def build_config_file_string(target, source, env):
870 (variable, value) = [s.get_contents() for s in source]
871 return "Defining %s as %s in %s." % (variable, value, target[0])
872
873# Combine the two functions into a scons Action object.
874config_action = Action(build_config_file, build_config_file_string)
875
876# The emitter munges the source & target node lists to reflect what
877# we're really doing.
878def config_emitter(target, source, env):
879 # extract variable name from Builder arg
880 variable = str(target[0])
881 # True target is config header file
882 target = joinpath('config', variable.lower() + '.hh')
883 val = env[variable]
884 if isinstance(val, bool):
885 # Force value to 0/1
886 val = int(val)
887 elif isinstance(val, str):
888 val = '"' + val + '"'
889
890 # Sources are variable name & value (packaged in SCons Value nodes)
891 return ([target], [Value(variable), Value(val)])
892
893config_builder = Builder(emitter = config_emitter, action = config_action)
894
895main.Append(BUILDERS = { 'ConfigFile' : config_builder })
896
897# libelf build is shared across all configs in the build root.
898main.SConscript('ext/libelf/SConscript',
899 variant_dir = joinpath(build_root, 'libelf'))
900
901# gzstream build is shared across all configs in the build root.
902main.SConscript('ext/gzstream/SConscript',
903 variant_dir = joinpath(build_root, 'gzstream'))
904
905###################################################
906#
907# This function is used to set up a directory with switching headers
908#
909###################################################
910
911main['ALL_ISA_LIST'] = all_isa_list
912def make_switching_dir(dname, switch_headers, env):
913 # Generate the header. target[0] is the full path of the output
914 # header to generate. 'source' is a dummy variable, since we get the
915 # list of ISAs from env['ALL_ISA_LIST'].
916 def gen_switch_hdr(target, source, env):
917 fname = str(target[0])
918 f = open(fname, 'w')
919 isa = env['TARGET_ISA'].lower()
920 print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
921 f.close()
922
923 # Build SCons Action object. 'varlist' specifies env vars that this
924 # action depends on; when env['ALL_ISA_LIST'] changes these actions
925 # should get re-executed.
926 switch_hdr_action = MakeAction(gen_switch_hdr,
927 Transform("GENERATE"), varlist=['ALL_ISA_LIST'])
928
929 # Instantiate actions for each header
930 for hdr in switch_headers:
931 env.Command(hdr, [], switch_hdr_action)
932Export('make_switching_dir')
933
934###################################################
935#
936# Define build environments for selected configurations.
937#
938###################################################
939
940for variant_path in variant_paths:
941 print "Building in", variant_path
942
943 # Make a copy of the build-root environment to use for this config.
944 env = main.Clone()
945 env['BUILDDIR'] = variant_path
946
947 # variant_dir is the tail component of build path, and is used to
948 # determine the build parameters (e.g., 'ALPHA_SE')
949 (build_root, variant_dir) = splitpath(variant_path)
950
951 # Set env variables according to the build directory config.
952 sticky_vars.files = []
953 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in
954 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke
955 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings.
956 current_vars_file = joinpath(build_root, 'variables', variant_dir)
957 if isfile(current_vars_file):
958 sticky_vars.files.append(current_vars_file)
959 print "Using saved variables file %s" % current_vars_file
960 else:
961 # Build dir-specific variables file doesn't exist.
962
963 # Make sure the directory is there so we can create it later
964 opt_dir = dirname(current_vars_file)
965 if not isdir(opt_dir):
966 mkdir(opt_dir)
967
968 # Get default build variables from source tree. Variables are
969 # normally determined by name of $VARIANT_DIR, but can be
970 # overriden by 'default=' arg on command line.
971 default = GetOption('default')
972 if not default:
973 default = variant_dir
974 default_vars_file = joinpath('build_opts', default)
975 if isfile(default_vars_file):
976 sticky_vars.files.append(default_vars_file)
977 print "Variables file %s not found,\n using defaults in %s" \
978 % (current_vars_file, default_vars_file)
979 else:
980 print "Error: cannot find variables file %s or %s" \
981 % (current_vars_file, default_vars_file)
982 Exit(1)
983
984 # Apply current variable settings to env
985 sticky_vars.Update(env)
986
987 help_texts["local_vars"] += \
988 "Build variables for %s:\n" % variant_dir \
989 + sticky_vars.GenerateHelpText(env)
990
991 # Process variable settings.
992
993 if not have_fenv and env['USE_FENV']:
994 print "Warning: <fenv.h> not available; " \
995 "forcing USE_FENV to False in", variant_dir + "."
996 env['USE_FENV'] = False
997
998 if not env['USE_FENV']:
999 print "Warning: No IEEE FP rounding mode control in", variant_dir + "."
1000 print " FP results may deviate slightly from other platforms."
1001
1002 if env['EFENCE']:
1003 env.Append(LIBS=['efence'])
1004
1005 if env['USE_MYSQL']:
1006 if not have_mysql:
1007 print "Warning: MySQL not available; " \
1008 "forcing USE_MYSQL to False in", variant_dir + "."
1009 env['USE_MYSQL'] = False
1010 else:
1011 print "Compiling in", variant_dir, "with MySQL support."
1012 env.ParseConfig(mysql_config_libs)
1013 env.ParseConfig(mysql_config_include)
1014
1015 # Save sticky variable settings back to current variables file
1016 sticky_vars.Save(current_vars_file, env)
1017
1018 if env['USE_SSE2']:
1019 env.Append(CCFLAGS=['-msse2'])
1020
1021 # The src/SConscript file sets up the build rules in 'env' according
1022 # to the configured variables. It returns a list of environments,
1023 # one for each variant build (debug, opt, etc.)
1024 envList = SConscript('src/SConscript', variant_dir = variant_path,
1025 exports = 'env')
1026
1027 # Set up the regression tests for each build.
1028 for e in envList:
1029 SConscript('tests/SConscript',
1030 variant_dir = joinpath(variant_path, 'tests', e.Label),
1031 exports = { 'env' : e }, duplicate = False)
1032
1033# base help text
1034Help('''
1035Usage: scons [scons options] [build variables] [target(s)]
1036
1037Extra scons options:
1038%(options)s
1039
1040Global build variables:
1041%(global_vars)s
1042
1043%(local_vars)s
1044''' % help_texts)
| 848 'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE',
849 'USE_POSIX_CLOCK' ]
850
851###################################################
852#
853# Define a SCons builder for configuration flag headers.
854#
855###################################################
856
857# This function generates a config header file that #defines the
858# variable symbol to the current variable setting (0 or 1). The source
859# operands are the name of the variable and a Value node containing the
860# value of the variable.
861def build_config_file(target, source, env):
862 (variable, value) = [s.get_contents() for s in source]
863 f = file(str(target[0]), 'w')
864 print >> f, '#define', variable, value
865 f.close()
866 return None
867
868# Generate the message to be printed when building the config file.
869def build_config_file_string(target, source, env):
870 (variable, value) = [s.get_contents() for s in source]
871 return "Defining %s as %s in %s." % (variable, value, target[0])
872
873# Combine the two functions into a scons Action object.
874config_action = Action(build_config_file, build_config_file_string)
875
876# The emitter munges the source & target node lists to reflect what
877# we're really doing.
878def config_emitter(target, source, env):
879 # extract variable name from Builder arg
880 variable = str(target[0])
881 # True target is config header file
882 target = joinpath('config', variable.lower() + '.hh')
883 val = env[variable]
884 if isinstance(val, bool):
885 # Force value to 0/1
886 val = int(val)
887 elif isinstance(val, str):
888 val = '"' + val + '"'
889
890 # Sources are variable name & value (packaged in SCons Value nodes)
891 return ([target], [Value(variable), Value(val)])
892
893config_builder = Builder(emitter = config_emitter, action = config_action)
894
895main.Append(BUILDERS = { 'ConfigFile' : config_builder })
896
897# libelf build is shared across all configs in the build root.
898main.SConscript('ext/libelf/SConscript',
899 variant_dir = joinpath(build_root, 'libelf'))
900
901# gzstream build is shared across all configs in the build root.
902main.SConscript('ext/gzstream/SConscript',
903 variant_dir = joinpath(build_root, 'gzstream'))
904
905###################################################
906#
907# This function is used to set up a directory with switching headers
908#
909###################################################
910
911main['ALL_ISA_LIST'] = all_isa_list
912def make_switching_dir(dname, switch_headers, env):
913 # Generate the header. target[0] is the full path of the output
914 # header to generate. 'source' is a dummy variable, since we get the
915 # list of ISAs from env['ALL_ISA_LIST'].
916 def gen_switch_hdr(target, source, env):
917 fname = str(target[0])
918 f = open(fname, 'w')
919 isa = env['TARGET_ISA'].lower()
920 print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
921 f.close()
922
923 # Build SCons Action object. 'varlist' specifies env vars that this
924 # action depends on; when env['ALL_ISA_LIST'] changes these actions
925 # should get re-executed.
926 switch_hdr_action = MakeAction(gen_switch_hdr,
927 Transform("GENERATE"), varlist=['ALL_ISA_LIST'])
928
929 # Instantiate actions for each header
930 for hdr in switch_headers:
931 env.Command(hdr, [], switch_hdr_action)
932Export('make_switching_dir')
933
934###################################################
935#
936# Define build environments for selected configurations.
937#
938###################################################
939
940for variant_path in variant_paths:
941 print "Building in", variant_path
942
943 # Make a copy of the build-root environment to use for this config.
944 env = main.Clone()
945 env['BUILDDIR'] = variant_path
946
947 # variant_dir is the tail component of build path, and is used to
948 # determine the build parameters (e.g., 'ALPHA_SE')
949 (build_root, variant_dir) = splitpath(variant_path)
950
951 # Set env variables according to the build directory config.
952 sticky_vars.files = []
953 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in
954 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke
955 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings.
956 current_vars_file = joinpath(build_root, 'variables', variant_dir)
957 if isfile(current_vars_file):
958 sticky_vars.files.append(current_vars_file)
959 print "Using saved variables file %s" % current_vars_file
960 else:
961 # Build dir-specific variables file doesn't exist.
962
963 # Make sure the directory is there so we can create it later
964 opt_dir = dirname(current_vars_file)
965 if not isdir(opt_dir):
966 mkdir(opt_dir)
967
968 # Get default build variables from source tree. Variables are
969 # normally determined by name of $VARIANT_DIR, but can be
970 # overriden by 'default=' arg on command line.
971 default = GetOption('default')
972 if not default:
973 default = variant_dir
974 default_vars_file = joinpath('build_opts', default)
975 if isfile(default_vars_file):
976 sticky_vars.files.append(default_vars_file)
977 print "Variables file %s not found,\n using defaults in %s" \
978 % (current_vars_file, default_vars_file)
979 else:
980 print "Error: cannot find variables file %s or %s" \
981 % (current_vars_file, default_vars_file)
982 Exit(1)
983
984 # Apply current variable settings to env
985 sticky_vars.Update(env)
986
987 help_texts["local_vars"] += \
988 "Build variables for %s:\n" % variant_dir \
989 + sticky_vars.GenerateHelpText(env)
990
991 # Process variable settings.
992
993 if not have_fenv and env['USE_FENV']:
994 print "Warning: <fenv.h> not available; " \
995 "forcing USE_FENV to False in", variant_dir + "."
996 env['USE_FENV'] = False
997
998 if not env['USE_FENV']:
999 print "Warning: No IEEE FP rounding mode control in", variant_dir + "."
1000 print " FP results may deviate slightly from other platforms."
1001
1002 if env['EFENCE']:
1003 env.Append(LIBS=['efence'])
1004
1005 if env['USE_MYSQL']:
1006 if not have_mysql:
1007 print "Warning: MySQL not available; " \
1008 "forcing USE_MYSQL to False in", variant_dir + "."
1009 env['USE_MYSQL'] = False
1010 else:
1011 print "Compiling in", variant_dir, "with MySQL support."
1012 env.ParseConfig(mysql_config_libs)
1013 env.ParseConfig(mysql_config_include)
1014
1015 # Save sticky variable settings back to current variables file
1016 sticky_vars.Save(current_vars_file, env)
1017
1018 if env['USE_SSE2']:
1019 env.Append(CCFLAGS=['-msse2'])
1020
1021 # The src/SConscript file sets up the build rules in 'env' according
1022 # to the configured variables. It returns a list of environments,
1023 # one for each variant build (debug, opt, etc.)
1024 envList = SConscript('src/SConscript', variant_dir = variant_path,
1025 exports = 'env')
1026
1027 # Set up the regression tests for each build.
1028 for e in envList:
1029 SConscript('tests/SConscript',
1030 variant_dir = joinpath(variant_path, 'tests', e.Label),
1031 exports = { 'env' : e }, duplicate = False)
1032
1033# base help text
1034Help('''
1035Usage: scons [scons options] [build variables] [target(s)]
1036
1037Extra scons options:
1038%(options)s
1039
1040Global build variables:
1041%(global_vars)s
1042
1043%(local_vars)s
1044''' % help_texts)
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