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 ('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).
42#
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.
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>/gem5 ; scons build/ALPHA/gem5.debug
53# % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.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>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug
60# % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug
61#
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
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://gem5.org/Dependencies
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://gem5.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, # gem5 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
123from m5.util.terminal import get_termcap
124
125help_texts = {
126 "options" : "",
127 "global_vars" : "",
128 "local_vars" : ""
129}
130
131Export("help_texts")
132
133
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.
145def AddLocalOption(*args, **kwargs):
146 col_width = 30
147
148 help = " " + ", ".join(args)
149 if "help" in kwargs:
150 length = len(help)
151 if length >= col_width:
152 help += "\n" + " " * col_width
153 else:
154 help += " " * (col_width - length)
155 help += kwargs["help"]
156 help_texts["options"] += help + "\n"
157
158 AddOption(*args, **kwargs)
159
160AddLocalOption('--colors', dest='use_colors', action='store_true',
161 help="Add color to abbreviated scons output")
162AddLocalOption('--no-colors', dest='use_colors', action='store_false',
163 help="Don't add color to abbreviated scons output")
164AddLocalOption('--default', dest='default', type='string', action='store',
165 help='Override which build_opts file to use for defaults')
166AddLocalOption('--ignore-style', dest='ignore_style', action='store_true',
167 help='Disable style checking hooks')
168AddLocalOption('--update-ref', dest='update_ref', action='store_true',
169 help='Update test reference outputs')
170AddLocalOption('--verbose', dest='verbose', action='store_true',
171 help='Print full tool command lines')
172
173termcap = get_termcap(GetOption('use_colors'))
174
175########################################################################
176#
177# Set up the main build environment.
178#
179########################################################################
180use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
181 'PYTHONPATH', 'RANLIB', 'SWIG' ])
182
183use_env = {}
184for key,val in os.environ.iteritems():
185 if key in use_vars or key.startswith("M5"):
186 use_env[key] = val
187
188main = Environment(ENV=use_env)
189main.Decider('MD5-timestamp')
190main.root = Dir(".") # The current directory (where this file lives).
191main.srcdir = Dir("src") # The source directory
192
193# add useful python code PYTHONPATH so it can be used by subprocesses
194# as well
195main.AppendENVPath('PYTHONPATH', extra_python_paths)
196
197########################################################################
198#
199# Mercurial Stuff.
200#
201# If the gem5 directory is a mercurial repository, we should do some
202# extra things.
203#
204########################################################################
205
206hgdir = main.root.Dir(".hg")
207
208mercurial_style_message = """
209You're missing the gem5 style hook, which automatically checks your code
210against the gem5 style rules on hg commit and qrefresh commands. This
211script will now install the hook in your .hg/hgrc file.
212Press enter to continue, or ctrl-c to abort: """
213
214mercurial_style_hook = """
215# The following lines were automatically added by gem5/SConstruct
216# to provide the gem5 style-checking hooks
217[extensions]
218style = %s/util/style.py
219
220[hooks]
221pretxncommit.style = python:style.check_style
222pre-qrefresh.style = python:style.check_style
223# End of SConstruct additions
224
225""" % (main.root.abspath)
226
227mercurial_lib_not_found = """
228Mercurial libraries cannot be found, ignoring style hook. If
229you are a gem5 developer, please fix this and run the style
230hook. It is important.
231"""
232
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.
236if not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty():
237 style_hook = True
238 try:
239 from mercurial import ui
240 ui = ui.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)
244 except ImportError:
245 print mercurial_lib_not_found
246
247 if not style_hook:
248 print mercurial_style_message,
249 # continue unless user does ctrl-c/ctrl-d etc.
250 try:
251 raw_input()
252 except:
253 print "Input exception, exiting scons.\n"
254 sys.exit(1)
255 hgrc_path = '%s/.hg/hgrc' % main.root.abspath
256 print "Adding style hook to", hgrc_path, "\n"
257 try:
258 hgrc = open(hgrc_path, 'a')
259 hgrc.write(mercurial_style_hook)
260 hgrc.close()
261 except:
262 print "Error updating", hgrc_path
263 sys.exit(1)
264
265
266###################################################
267#
268# Figure out which configurations to set up based on the path(s) of
269# the target(s).
270#
271###################################################
272
273# Find default configuration & binary.
274Default(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug'))
275
276# helper function: find last occurrence of element in list
277def rfind(l, elt, offs = -1):
278 for i in range(len(l)+offs, 0, -1):
279 if l[i] == elt:
280 return i
281 raise ValueError, "element not found"
282
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
286def makePathListAbsolute(path_list, root=GetLaunchDir()):
287 return [abspath(joinpath(root, expanduser(str(p))))
288 for p in path_list]
289
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.
295
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!).
299BUILD_TARGETS[:] = makePathListAbsolute(BUILD_TARGETS)
300
301# Generate a list of the unique build roots and configs that the
302# collected targets reference.
303variant_paths = []
304build_root = None
305for t in BUILD_TARGETS:
306 path_dirs = t.split('/')
307 try:
308 build_top = rfind(path_dirs, 'build', -2)
309 except:
310 print "Error: no non-leaf 'build' dir found on target path", t
311 Exit(1)
312 this_build_root = joinpath('/',*path_dirs[:build_top+1])
313 if not build_root:
314 build_root = this_build_root
315 else:
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)
319 Exit(1)
320 variant_path = joinpath('/',*path_dirs[:build_top+2])
321 if variant_path not in variant_paths:
322 variant_paths.append(variant_path)
323
324# Make sure build_root exists (might not if this is the first build there)
325if not isdir(build_root):
326 mkdir(build_root)
327main['BUILDROOT'] = build_root
328
329Export('main')
330
331main.SConsignFile(joinpath(build_root, "sconsign"))
332
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.
337main.SetOption('duplicate', 'soft-copy')
338
339#
340# Set up global sticky variables... these are common to an entire build
341# tree (not specific to a particular build like ALPHA_SE)
342#
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 ('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', '')
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 extras_dir_list.
367base_dir = main.srcdir.abspath
368if main['EXTRAS']:
369 extras_dir_list = makePathListAbsolute(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# enable the regression script to use the termcap
461main['TERMCAP'] = termcap
462
463if GetOption('verbose'):
464 def MakeAction(action, string, *args, **kwargs):
465 return Action(action, *args, **kwargs)
466else:
467 MakeAction = Action
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")
478Export('MakeAction')
479
480CXX_version = readCommand([main['CXX'],'--version'], exception=False)
481CXX_V = readCommand([main['CXX'],'-V'], exception=False)
482
483main['GCC'] = CXX_version and CXX_version.find('g++') >= 0
484main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
485main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
486main['CLANG'] = CXX_version and CXX_version.find('clang') >= 0
487if main['GCC'] + main['SUNCC'] + main['ICC'] + main['CLANG'] > 1:
488 print 'Error: How can we have two at the same time?'
489 Exit(1)
490
491# Set up default C++ compiler flags
492if main['GCC']:
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'])
507elif main['ICC']:
508 pass #Fix me... add warning flags once we clean up icc warnings
509elif main['SUNCC']:
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'])
516elif main['CLANG']:
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
524 Exit(1)
525 else:
526 print 'Error: Unable to determine clang version.'
527 Exit(1)
528
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
535 # of if-statements
536 main.Append(CCFLAGS=['-Wno-parentheses'])
537
538 if compareVersions(clang_version, "3") >= 0:
539 main.Append(CXXFLAGS=['-std=c++0x'])
540else:
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.'
543 Exit(1)
544
545# Set up common yacc/bison flags (needed for Ruby)
546main['YACCFLAGS'] = '-d'
547main['YACCHXXFILESUFFIX'] = '.hh'
548
549# Do this after we save setting back, or else we'll tack on an
550# extra 'qdo' every time we run scons.
551if main['BATCH']:
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']
557
558if sys.platform == 'cygwin':
559 # cygwin has some header file issues...
560 main.Append(CCFLAGS=["-Wno-uninitialized"])
561
562# Check for SWIG
563if not main.has_key('SWIG'):
564 print 'Error: SWIG utility not found.'
565 print ' Please install (see http://www.swig.org) and retry.'
566 Exit(1)
567
568# Check for appropriate SWIG version
569swig_version = readCommand(('swig', '-version'), exception='').split()
570# First 3 words should be "SWIG Version x.y.z"
571if len(swig_version) < 3 or \
572 swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
573 print 'Error determining SWIG version.'
574 Exit(1)
575
576min_swig_version = '1.3.34'
577if 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]
580 Exit(1)
581
582# Set up SWIG flags & scanner
583swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
584main.Append(SWIGFLAGS=swig_flags)
585
586# filter out all existing swig scanners, they mess up the dependency
587# stuff for some reason
588scanners = []
589for scanner in main['SCANNERS']:
590 skeys = scanner.skeys
591 if skeys == '.i':
592 continue
593
594 if isinstance(skeys, (list, tuple)) and '.i' in skeys:
595 continue
596
597 scanners.append(scanner)
598
599# add the new swig scanner that we like better
600from SCons.Scanner import ClassicCPP as CPPScanner
601swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
602scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
603
604# replace the scanners list that has what we want
605main['SCANNERS'] = scanners
606
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.
611def 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
617 #
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");
626 extern int x;
627 int main() { return x; }
628 ''', extension=".c")
629 context.env.Append(LEADING_UNDERSCORE=ret)
630 context.Result(ret)
631 return ret
632
633# Platform-specific configuration. Note again that we assume that all
634# builds under a given build root run on the same host platform.
635conf = Configure(main,
636 conf_dir = joinpath(build_root, '.scons_config'),
637 log_file = joinpath(build_root, 'scons_config.log'),
638 custom_tests = { 'CheckLeading' : CheckLeading })
639
640# Check for leading underscores. Don't really need to worry either
641# way so don't need to check the return code.
642conf.CheckLeading()
643
644# Check if we should compile a 64 bit binary on Mac OS X/Darwin
645try:
646 import platform
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'])
654except:
655 pass
656
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.
662if not conf:
663 def NullCheck(*args, **kwargs):
664 return True
665
666 class NullConf:
667 def __init__(self, env):
668 self.env = env
669 def Finish(self):
670 return self.env
671 def __getattr__(self, mname):
672 return NullCheck
673
674 conf = NullConf(main)
675
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.
681from distutils import sysconfig
682
683py_getvar = sysconfig.get_config_var
684
685py_debug = getattr(sys, 'pydebug', False)
686py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
687
688py_general_include = sysconfig.get_python_inc()
689py_platform_include = sysconfig.get_python_inc(plat_specific=True)
690py_includes = [ py_general_include ]
691if py_platform_include != py_general_include:
692 py_includes.append(py_platform_include)
693
694py_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/.
697if not py_getvar('Py_ENABLE_SHARED'):
698 py_lib_path.append(py_getvar('LIBPL'))
699
700py_libs = []
701for 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])
706 else:
707 lib = lib[2:]
708 if lib not in py_libs:
709 py_libs.append(lib)
710py_libs.append(py_version)
711
712main.Append(CPPPATH=py_includes)
713main.Append(LIBPATH=py_lib_path)
714
715# Cache build files in the supplied directory.
716if main['M5_BUILD_CACHE']:
717 print 'Using build cache located at', main['M5_BUILD_CACHE']
718 CacheDir(main['M5_BUILD_CACHE'])
719
720
721# verify that this stuff works
722if not conf.CheckHeader('Python.h', '<>'):
723 print "Error: can't find Python.h header in", py_includes
724 Exit(1)
725
726for lib in py_libs:
727 if not conf.CheckLib(lib):
728 print "Error: can't find library %s required by python" % lib
729 Exit(1)
730
731# On Solaris you need to use libsocket for socket ops
732if 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())"
735 Exit(1)
736
737# Check for zlib. If the check passes, libz will be automatically
738# added to the LIBS environment variable.
739if 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.'
743 Exit(1)
744
745# Check for librt.
746have_posix_clock = \
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);')
751
752if not have_posix_clock:
753 print "Can't find library for POSIX clocks."
754
755# Check for <fenv.h> (C99 FP environment control)
756have_fenv = conf.CheckHeader('fenv.h', '<>')
757if not have_fenv:
758 print "Warning: Header file <fenv.h> not found."
759 print " This host has no IEEE FP rounding mode control."
760
761######################################################################
762#
763# Finish the configuration
764#
765main = conf.Finish()
766
767######################################################################
768#
769# Collect all non-global variables
770#
771
772# Define the universe of supported ISAs
773all_isa_list = [ ]
774Export('all_isa_list')
775
776class CpuModel(object):
777 '''The CpuModel class encapsulates everything the ISA parser needs to
778 know about a particular CPU model.'''
779
780 # Dict of available CPU model objects. Accessible as CpuModel.dict.
781 dict = {}
782 list = []
783 defaults = []
784
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
793
794 # This cpu is enabled by default
795 self.default = default
796
797 # Add self to dict
798 if name in CpuModel.dict:
799 raise AttributeError, "CpuModel '%s' already registered" % name
800 CpuModel.dict[name] = self
801 CpuModel.list.append(name)
802
803Export('CpuModel')
804
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).
808sticky_vars = Variables(args=ARGUMENTS)
809Export('sticky_vars')
810
811# Sticky variables that should be exported
812export_vars = []
813Export('export_vars')
814
815# Walk the tree and execute all SConsopts scripts that wil add to the
816# above variables
817if not GetOption('verbose'):
818 print "Reading SConsopts"
819for bdir in [ base_dir ] + extras_dir_list:
820 if not isdir(bdir):
821 print "Error: directory '%s' does not exist" % bdir
822 Exit(1)
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'))
828
829all_isa_list.sort()
830
831sticky_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)),
| 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 ('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).
42#
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.
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>/gem5 ; scons build/ALPHA/gem5.debug
53# % cd <path-to-src>/gem5/build/ALPHA; scons -u gem5.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>/gem5 ; scons /local/foo/build/ALPHA/gem5.debug
60# % cd /local/foo/build/ALPHA; scons -C <path-to-src>/gem5 gem5.debug
61#
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
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://gem5.org/Dependencies
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://gem5.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, # gem5 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
123from m5.util.terminal import get_termcap
124
125help_texts = {
126 "options" : "",
127 "global_vars" : "",
128 "local_vars" : ""
129}
130
131Export("help_texts")
132
133
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.
145def AddLocalOption(*args, **kwargs):
146 col_width = 30
147
148 help = " " + ", ".join(args)
149 if "help" in kwargs:
150 length = len(help)
151 if length >= col_width:
152 help += "\n" + " " * col_width
153 else:
154 help += " " * (col_width - length)
155 help += kwargs["help"]
156 help_texts["options"] += help + "\n"
157
158 AddOption(*args, **kwargs)
159
160AddLocalOption('--colors', dest='use_colors', action='store_true',
161 help="Add color to abbreviated scons output")
162AddLocalOption('--no-colors', dest='use_colors', action='store_false',
163 help="Don't add color to abbreviated scons output")
164AddLocalOption('--default', dest='default', type='string', action='store',
165 help='Override which build_opts file to use for defaults')
166AddLocalOption('--ignore-style', dest='ignore_style', action='store_true',
167 help='Disable style checking hooks')
168AddLocalOption('--update-ref', dest='update_ref', action='store_true',
169 help='Update test reference outputs')
170AddLocalOption('--verbose', dest='verbose', action='store_true',
171 help='Print full tool command lines')
172
173termcap = get_termcap(GetOption('use_colors'))
174
175########################################################################
176#
177# Set up the main build environment.
178#
179########################################################################
180use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
181 'PYTHONPATH', 'RANLIB', 'SWIG' ])
182
183use_env = {}
184for key,val in os.environ.iteritems():
185 if key in use_vars or key.startswith("M5"):
186 use_env[key] = val
187
188main = Environment(ENV=use_env)
189main.Decider('MD5-timestamp')
190main.root = Dir(".") # The current directory (where this file lives).
191main.srcdir = Dir("src") # The source directory
192
193# add useful python code PYTHONPATH so it can be used by subprocesses
194# as well
195main.AppendENVPath('PYTHONPATH', extra_python_paths)
196
197########################################################################
198#
199# Mercurial Stuff.
200#
201# If the gem5 directory is a mercurial repository, we should do some
202# extra things.
203#
204########################################################################
205
206hgdir = main.root.Dir(".hg")
207
208mercurial_style_message = """
209You're missing the gem5 style hook, which automatically checks your code
210against the gem5 style rules on hg commit and qrefresh commands. This
211script will now install the hook in your .hg/hgrc file.
212Press enter to continue, or ctrl-c to abort: """
213
214mercurial_style_hook = """
215# The following lines were automatically added by gem5/SConstruct
216# to provide the gem5 style-checking hooks
217[extensions]
218style = %s/util/style.py
219
220[hooks]
221pretxncommit.style = python:style.check_style
222pre-qrefresh.style = python:style.check_style
223# End of SConstruct additions
224
225""" % (main.root.abspath)
226
227mercurial_lib_not_found = """
228Mercurial libraries cannot be found, ignoring style hook. If
229you are a gem5 developer, please fix this and run the style
230hook. It is important.
231"""
232
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.
236if not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty():
237 style_hook = True
238 try:
239 from mercurial import ui
240 ui = ui.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)
244 except ImportError:
245 print mercurial_lib_not_found
246
247 if not style_hook:
248 print mercurial_style_message,
249 # continue unless user does ctrl-c/ctrl-d etc.
250 try:
251 raw_input()
252 except:
253 print "Input exception, exiting scons.\n"
254 sys.exit(1)
255 hgrc_path = '%s/.hg/hgrc' % main.root.abspath
256 print "Adding style hook to", hgrc_path, "\n"
257 try:
258 hgrc = open(hgrc_path, 'a')
259 hgrc.write(mercurial_style_hook)
260 hgrc.close()
261 except:
262 print "Error updating", hgrc_path
263 sys.exit(1)
264
265
266###################################################
267#
268# Figure out which configurations to set up based on the path(s) of
269# the target(s).
270#
271###################################################
272
273# Find default configuration & binary.
274Default(environ.get('M5_DEFAULT_BINARY', 'build/ALPHA/gem5.debug'))
275
276# helper function: find last occurrence of element in list
277def rfind(l, elt, offs = -1):
278 for i in range(len(l)+offs, 0, -1):
279 if l[i] == elt:
280 return i
281 raise ValueError, "element not found"
282
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
286def makePathListAbsolute(path_list, root=GetLaunchDir()):
287 return [abspath(joinpath(root, expanduser(str(p))))
288 for p in path_list]
289
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.
295
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!).
299BUILD_TARGETS[:] = makePathListAbsolute(BUILD_TARGETS)
300
301# Generate a list of the unique build roots and configs that the
302# collected targets reference.
303variant_paths = []
304build_root = None
305for t in BUILD_TARGETS:
306 path_dirs = t.split('/')
307 try:
308 build_top = rfind(path_dirs, 'build', -2)
309 except:
310 print "Error: no non-leaf 'build' dir found on target path", t
311 Exit(1)
312 this_build_root = joinpath('/',*path_dirs[:build_top+1])
313 if not build_root:
314 build_root = this_build_root
315 else:
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)
319 Exit(1)
320 variant_path = joinpath('/',*path_dirs[:build_top+2])
321 if variant_path not in variant_paths:
322 variant_paths.append(variant_path)
323
324# Make sure build_root exists (might not if this is the first build there)
325if not isdir(build_root):
326 mkdir(build_root)
327main['BUILDROOT'] = build_root
328
329Export('main')
330
331main.SConsignFile(joinpath(build_root, "sconsign"))
332
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.
337main.SetOption('duplicate', 'soft-copy')
338
339#
340# Set up global sticky variables... these are common to an entire build
341# tree (not specific to a particular build like ALPHA_SE)
342#
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 ('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', '')
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 extras_dir_list.
367base_dir = main.srcdir.abspath
368if main['EXTRAS']:
369 extras_dir_list = makePathListAbsolute(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# enable the regression script to use the termcap
461main['TERMCAP'] = termcap
462
463if GetOption('verbose'):
464 def MakeAction(action, string, *args, **kwargs):
465 return Action(action, *args, **kwargs)
466else:
467 MakeAction = Action
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")
478Export('MakeAction')
479
480CXX_version = readCommand([main['CXX'],'--version'], exception=False)
481CXX_V = readCommand([main['CXX'],'-V'], exception=False)
482
483main['GCC'] = CXX_version and CXX_version.find('g++') >= 0
484main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
485main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
486main['CLANG'] = CXX_version and CXX_version.find('clang') >= 0
487if main['GCC'] + main['SUNCC'] + main['ICC'] + main['CLANG'] > 1:
488 print 'Error: How can we have two at the same time?'
489 Exit(1)
490
491# Set up default C++ compiler flags
492if main['GCC']:
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'])
507elif main['ICC']:
508 pass #Fix me... add warning flags once we clean up icc warnings
509elif main['SUNCC']:
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'])
516elif main['CLANG']:
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
524 Exit(1)
525 else:
526 print 'Error: Unable to determine clang version.'
527 Exit(1)
528
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
535 # of if-statements
536 main.Append(CCFLAGS=['-Wno-parentheses'])
537
538 if compareVersions(clang_version, "3") >= 0:
539 main.Append(CXXFLAGS=['-std=c++0x'])
540else:
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.'
543 Exit(1)
544
545# Set up common yacc/bison flags (needed for Ruby)
546main['YACCFLAGS'] = '-d'
547main['YACCHXXFILESUFFIX'] = '.hh'
548
549# Do this after we save setting back, or else we'll tack on an
550# extra 'qdo' every time we run scons.
551if main['BATCH']:
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']
557
558if sys.platform == 'cygwin':
559 # cygwin has some header file issues...
560 main.Append(CCFLAGS=["-Wno-uninitialized"])
561
562# Check for SWIG
563if not main.has_key('SWIG'):
564 print 'Error: SWIG utility not found.'
565 print ' Please install (see http://www.swig.org) and retry.'
566 Exit(1)
567
568# Check for appropriate SWIG version
569swig_version = readCommand(('swig', '-version'), exception='').split()
570# First 3 words should be "SWIG Version x.y.z"
571if len(swig_version) < 3 or \
572 swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
573 print 'Error determining SWIG version.'
574 Exit(1)
575
576min_swig_version = '1.3.34'
577if 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]
580 Exit(1)
581
582# Set up SWIG flags & scanner
583swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
584main.Append(SWIGFLAGS=swig_flags)
585
586# filter out all existing swig scanners, they mess up the dependency
587# stuff for some reason
588scanners = []
589for scanner in main['SCANNERS']:
590 skeys = scanner.skeys
591 if skeys == '.i':
592 continue
593
594 if isinstance(skeys, (list, tuple)) and '.i' in skeys:
595 continue
596
597 scanners.append(scanner)
598
599# add the new swig scanner that we like better
600from SCons.Scanner import ClassicCPP as CPPScanner
601swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
602scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
603
604# replace the scanners list that has what we want
605main['SCANNERS'] = scanners
606
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.
611def 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
617 #
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");
626 extern int x;
627 int main() { return x; }
628 ''', extension=".c")
629 context.env.Append(LEADING_UNDERSCORE=ret)
630 context.Result(ret)
631 return ret
632
633# Platform-specific configuration. Note again that we assume that all
634# builds under a given build root run on the same host platform.
635conf = Configure(main,
636 conf_dir = joinpath(build_root, '.scons_config'),
637 log_file = joinpath(build_root, 'scons_config.log'),
638 custom_tests = { 'CheckLeading' : CheckLeading })
639
640# Check for leading underscores. Don't really need to worry either
641# way so don't need to check the return code.
642conf.CheckLeading()
643
644# Check if we should compile a 64 bit binary on Mac OS X/Darwin
645try:
646 import platform
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'])
654except:
655 pass
656
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.
662if not conf:
663 def NullCheck(*args, **kwargs):
664 return True
665
666 class NullConf:
667 def __init__(self, env):
668 self.env = env
669 def Finish(self):
670 return self.env
671 def __getattr__(self, mname):
672 return NullCheck
673
674 conf = NullConf(main)
675
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.
681from distutils import sysconfig
682
683py_getvar = sysconfig.get_config_var
684
685py_debug = getattr(sys, 'pydebug', False)
686py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
687
688py_general_include = sysconfig.get_python_inc()
689py_platform_include = sysconfig.get_python_inc(plat_specific=True)
690py_includes = [ py_general_include ]
691if py_platform_include != py_general_include:
692 py_includes.append(py_platform_include)
693
694py_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/.
697if not py_getvar('Py_ENABLE_SHARED'):
698 py_lib_path.append(py_getvar('LIBPL'))
699
700py_libs = []
701for 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])
706 else:
707 lib = lib[2:]
708 if lib not in py_libs:
709 py_libs.append(lib)
710py_libs.append(py_version)
711
712main.Append(CPPPATH=py_includes)
713main.Append(LIBPATH=py_lib_path)
714
715# Cache build files in the supplied directory.
716if main['M5_BUILD_CACHE']:
717 print 'Using build cache located at', main['M5_BUILD_CACHE']
718 CacheDir(main['M5_BUILD_CACHE'])
719
720
721# verify that this stuff works
722if not conf.CheckHeader('Python.h', '<>'):
723 print "Error: can't find Python.h header in", py_includes
724 Exit(1)
725
726for lib in py_libs:
727 if not conf.CheckLib(lib):
728 print "Error: can't find library %s required by python" % lib
729 Exit(1)
730
731# On Solaris you need to use libsocket for socket ops
732if 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())"
735 Exit(1)
736
737# Check for zlib. If the check passes, libz will be automatically
738# added to the LIBS environment variable.
739if 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.'
743 Exit(1)
744
745# Check for librt.
746have_posix_clock = \
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);')
751
752if not have_posix_clock:
753 print "Can't find library for POSIX clocks."
754
755# Check for <fenv.h> (C99 FP environment control)
756have_fenv = conf.CheckHeader('fenv.h', '<>')
757if not have_fenv:
758 print "Warning: Header file <fenv.h> not found."
759 print " This host has no IEEE FP rounding mode control."
760
761######################################################################
762#
763# Finish the configuration
764#
765main = conf.Finish()
766
767######################################################################
768#
769# Collect all non-global variables
770#
771
772# Define the universe of supported ISAs
773all_isa_list = [ ]
774Export('all_isa_list')
775
776class CpuModel(object):
777 '''The CpuModel class encapsulates everything the ISA parser needs to
778 know about a particular CPU model.'''
779
780 # Dict of available CPU model objects. Accessible as CpuModel.dict.
781 dict = {}
782 list = []
783 defaults = []
784
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
793
794 # This cpu is enabled by default
795 self.default = default
796
797 # Add self to dict
798 if name in CpuModel.dict:
799 raise AttributeError, "CpuModel '%s' already registered" % name
800 CpuModel.dict[name] = self
801 CpuModel.list.append(name)
802
803Export('CpuModel')
804
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).
808sticky_vars = Variables(args=ARGUMENTS)
809Export('sticky_vars')
810
811# Sticky variables that should be exported
812export_vars = []
813Export('export_vars')
814
815# Walk the tree and execute all SConsopts scripts that wil add to the
816# above variables
817if not GetOption('verbose'):
818 print "Reading SConsopts"
819for bdir in [ base_dir ] + extras_dir_list:
820 if not isdir(bdir):
821 print "Error: directory '%s' does not exist" % bdir
822 Exit(1)
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'))
828
829all_isa_list.sort()
830
831sticky_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)),
|
857 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
858
859###################################################
860#
861# Define a SCons builder for configuration flag headers.
862#
863###################################################
864
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.
869def 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
873 f.close()
874 return None
875
876# Combine the two functions into a scons Action object.
877config_action = MakeAction(build_config_file, Transform("CONFIG H", 2))
878
879# The emitter munges the source & target node lists to reflect what
880# we're really doing.
881def 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')
886 val = env[variable]
887 if isinstance(val, bool):
888 # Force value to 0/1
889 val = int(val)
890 elif isinstance(val, str):
891 val = '"' + val + '"'
892
893 # Sources are variable name & value (packaged in SCons Value nodes)
894 return ([target], [Value(variable), Value(val)])
895
896config_builder = Builder(emitter = config_emitter, action = config_action)
897
898main.Append(BUILDERS = { 'ConfigFile' : config_builder })
899
900# libelf build is shared across all configs in the build root.
901main.SConscript('ext/libelf/SConscript',
902 variant_dir = joinpath(build_root, 'libelf'))
903
904# gzstream build is shared across all configs in the build root.
905main.SConscript('ext/gzstream/SConscript',
906 variant_dir = joinpath(build_root, 'gzstream'))
907
908###################################################
909#
910# This function is used to set up a directory with switching headers
911#
912###################################################
913
914main['ALL_ISA_LIST'] = all_isa_list
915def 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])
921 f = open(fname, 'w')
922 isa = env['TARGET_ISA'].lower()
923 print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
924 f.close()
925
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'])
931
932 # Instantiate actions for each header
933 for hdr in switch_headers:
934 env.Command(hdr, [], switch_hdr_action)
935Export('make_switching_dir')
936
937###################################################
938#
939# Define build environments for selected configurations.
940#
941###################################################
942
943for variant_path in variant_paths:
944 print "Building in", variant_path
945
946 # Make a copy of the build-root environment to use for this config.
947 env = main.Clone()
948 env['BUILDDIR'] = variant_path
949
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)
953
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
963 else:
964 # Build dir-specific variables file doesn't exist.
965
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):
969 mkdir(opt_dir)
970
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')
976 if default:
977 default_vars_files = [joinpath(build_root, 'variables', default),
978 joinpath(opts_dir, default)]
979 else:
980 default_vars_files = [joinpath(opts_dir, variant_dir)]
981 existing_files = filter(isfile, default_vars_files)
982 if existing_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)
987 else:
988 print "Error: cannot find variables file %s or " \
989 "default file(s) %s" \
990 % (current_vars_file, ' or '.join(default_vars_files))
991 Exit(1)
992
993 # Apply current variable settings to env
994 sticky_vars.Update(env)
995
996 help_texts["local_vars"] += \
997 "Build variables for %s:\n" % variant_dir \
998 + sticky_vars.GenerateHelpText(env)
999
1000 # Process variable settings.
1001
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
1006
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."
1010
1011 if env['EFENCE']:
1012 env.Append(LIBS=['efence'])
1013
1014 # Save sticky variable settings back to current variables file
1015 sticky_vars.Save(current_vars_file, env)
1016
1017 if env['USE_SSE2']:
1018 env.Append(CCFLAGS=['-msse2'])
1019
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,
1024 exports = 'env')
1025
1026 # Set up the regression tests for each build.
1027 for e in envList:
1028 SConscript('tests/SConscript',
1029 variant_dir = joinpath(variant_path, 'tests', e.Label),
1030 exports = { 'env' : e }, duplicate = False)
1031
1032# base help text
1033Help('''
1034Usage: scons [scons options] [build variables] [target(s)]
1035
1036Extra scons options:
1037%(options)s
1038
1039Global build variables:
1040%(global_vars)s
1041
1042%(local_vars)s
1043''' % help_texts)
| 851 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
852
853###################################################
854#
855# Define a SCons builder for configuration flag headers.
856#
857###################################################
858
859# This function generates a config header file that #defines the
860# variable symbol to the current variable setting (0 or 1). The source
861# operands are the name of the variable and a Value node containing the
862# value of the variable.
863def build_config_file(target, source, env):
864 (variable, value) = [s.get_contents() for s in source]
865 f = file(str(target[0]), 'w')
866 print >> f, '#define', variable, value
867 f.close()
868 return None
869
870# Combine the two functions into a scons Action object.
871config_action = MakeAction(build_config_file, Transform("CONFIG H", 2))
872
873# The emitter munges the source & target node lists to reflect what
874# we're really doing.
875def config_emitter(target, source, env):
876 # extract variable name from Builder arg
877 variable = str(target[0])
878 # True target is config header file
879 target = joinpath('config', variable.lower() + '.hh')
880 val = env[variable]
881 if isinstance(val, bool):
882 # Force value to 0/1
883 val = int(val)
884 elif isinstance(val, str):
885 val = '"' + val + '"'
886
887 # Sources are variable name & value (packaged in SCons Value nodes)
888 return ([target], [Value(variable), Value(val)])
889
890config_builder = Builder(emitter = config_emitter, action = config_action)
891
892main.Append(BUILDERS = { 'ConfigFile' : config_builder })
893
894# libelf build is shared across all configs in the build root.
895main.SConscript('ext/libelf/SConscript',
896 variant_dir = joinpath(build_root, 'libelf'))
897
898# gzstream build is shared across all configs in the build root.
899main.SConscript('ext/gzstream/SConscript',
900 variant_dir = joinpath(build_root, 'gzstream'))
901
902###################################################
903#
904# This function is used to set up a directory with switching headers
905#
906###################################################
907
908main['ALL_ISA_LIST'] = all_isa_list
909def make_switching_dir(dname, switch_headers, env):
910 # Generate the header. target[0] is the full path of the output
911 # header to generate. 'source' is a dummy variable, since we get the
912 # list of ISAs from env['ALL_ISA_LIST'].
913 def gen_switch_hdr(target, source, env):
914 fname = str(target[0])
915 f = open(fname, 'w')
916 isa = env['TARGET_ISA'].lower()
917 print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
918 f.close()
919
920 # Build SCons Action object. 'varlist' specifies env vars that this
921 # action depends on; when env['ALL_ISA_LIST'] changes these actions
922 # should get re-executed.
923 switch_hdr_action = MakeAction(gen_switch_hdr,
924 Transform("GENERATE"), varlist=['ALL_ISA_LIST'])
925
926 # Instantiate actions for each header
927 for hdr in switch_headers:
928 env.Command(hdr, [], switch_hdr_action)
929Export('make_switching_dir')
930
931###################################################
932#
933# Define build environments for selected configurations.
934#
935###################################################
936
937for variant_path in variant_paths:
938 print "Building in", variant_path
939
940 # Make a copy of the build-root environment to use for this config.
941 env = main.Clone()
942 env['BUILDDIR'] = variant_path
943
944 # variant_dir is the tail component of build path, and is used to
945 # determine the build parameters (e.g., 'ALPHA_SE')
946 (build_root, variant_dir) = splitpath(variant_path)
947
948 # Set env variables according to the build directory config.
949 sticky_vars.files = []
950 # Variables for $BUILD_ROOT/$VARIANT_DIR are stored in
951 # $BUILD_ROOT/variables/$VARIANT_DIR so you can nuke
952 # $BUILD_ROOT/$VARIANT_DIR without losing your variables settings.
953 current_vars_file = joinpath(build_root, 'variables', variant_dir)
954 if isfile(current_vars_file):
955 sticky_vars.files.append(current_vars_file)
956 print "Using saved variables file %s" % current_vars_file
957 else:
958 # Build dir-specific variables file doesn't exist.
959
960 # Make sure the directory is there so we can create it later
961 opt_dir = dirname(current_vars_file)
962 if not isdir(opt_dir):
963 mkdir(opt_dir)
964
965 # Get default build variables from source tree. Variables are
966 # normally determined by name of $VARIANT_DIR, but can be
967 # overridden by '--default=' arg on command line.
968 default = GetOption('default')
969 opts_dir = joinpath(main.root.abspath, 'build_opts')
970 if default:
971 default_vars_files = [joinpath(build_root, 'variables', default),
972 joinpath(opts_dir, default)]
973 else:
974 default_vars_files = [joinpath(opts_dir, variant_dir)]
975 existing_files = filter(isfile, default_vars_files)
976 if existing_files:
977 default_vars_file = existing_files[0]
978 sticky_vars.files.append(default_vars_file)
979 print "Variables file %s not found,\n using defaults in %s" \
980 % (current_vars_file, default_vars_file)
981 else:
982 print "Error: cannot find variables file %s or " \
983 "default file(s) %s" \
984 % (current_vars_file, ' or '.join(default_vars_files))
985 Exit(1)
986
987 # Apply current variable settings to env
988 sticky_vars.Update(env)
989
990 help_texts["local_vars"] += \
991 "Build variables for %s:\n" % variant_dir \
992 + sticky_vars.GenerateHelpText(env)
993
994 # Process variable settings.
995
996 if not have_fenv and env['USE_FENV']:
997 print "Warning: <fenv.h> not available; " \
998 "forcing USE_FENV to False in", variant_dir + "."
999 env['USE_FENV'] = False
1000
1001 if not env['USE_FENV']:
1002 print "Warning: No IEEE FP rounding mode control in", variant_dir + "."
1003 print " FP results may deviate slightly from other platforms."
1004
1005 if env['EFENCE']:
1006 env.Append(LIBS=['efence'])
1007
1008 # Save sticky variable settings back to current variables file
1009 sticky_vars.Save(current_vars_file, env)
1010
1011 if env['USE_SSE2']:
1012 env.Append(CCFLAGS=['-msse2'])
1013
1014 # The src/SConscript file sets up the build rules in 'env' according
1015 # to the configured variables. It returns a list of environments,
1016 # one for each variant build (debug, opt, etc.)
1017 envList = SConscript('src/SConscript', variant_dir = variant_path,
1018 exports = 'env')
1019
1020 # Set up the regression tests for each build.
1021 for e in envList:
1022 SConscript('tests/SConscript',
1023 variant_dir = joinpath(variant_path, 'tests', e.Label),
1024 exports = { 'env' : e }, duplicate = False)
1025
1026# base help text
1027Help('''
1028Usage: scons [scons options] [build variables] [target(s)]
1029
1030Extra scons options:
1031%(options)s
1032
1033Global build variables:
1034%(global_vars)s
1035
1036%(local_vars)s
1037''' % help_texts)
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