# -*- mode:python -*-
+# Copyright (c) 2013, 2015, 2016 ARM Limited
+# All rights reserved.
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder. You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
# Copyright (c) 2011 Advanced Micro Devices, Inc.
# Copyright (c) 2009 The Hewlett-Packard Development Company
# Copyright (c) 2004-2005 The Regents of The University of Michigan
"""
raise
-# We ensure the python version early because we have stuff that
-# requires python 2.4
+# We ensure the python version early because because python-config
+# requires python 2.5
try:
- EnsurePythonVersion(2, 4)
+ EnsurePythonVersion(2, 5)
except SystemExit, e:
print """
You can use a non-default installation of the Python interpreter by
-either (1) rearranging your PATH so that scons finds the non-default
-'python' first or (2) explicitly invoking an alternative interpreter
-on the scons script.
+rearranging your PATH so that scons finds the non-default 'python' and
+'python-config' first.
For more details, see:
http://gem5.org/wiki/index.php/Using_a_non-default_Python_installation
raise
# Global Python includes
+import itertools
import os
import re
+import shutil
import subprocess
import sys
Dir('src/python').srcnode().abspath, # gem5 includes
Dir('ext/ply').srcnode().abspath, # ply is used by several files
]
-
+
sys.path[1:1] = extra_python_paths
from m5.util import compareVersions, readCommand
help="Add color to abbreviated scons output")
AddLocalOption('--no-colors', dest='use_colors', action='store_false',
help="Don't add color to abbreviated scons output")
+AddLocalOption('--with-cxx-config', dest='with_cxx_config',
+ action='store_true',
+ help="Build with support for C++-based configuration")
AddLocalOption('--default', dest='default', type='string', action='store',
help='Override which build_opts file to use for defaults')
AddLocalOption('--ignore-style', dest='ignore_style', action='store_true',
help='Disable style checking hooks')
+AddLocalOption('--no-lto', dest='no_lto', action='store_true',
+ help='Disable Link-Time Optimization for fast')
+AddLocalOption('--force-lto', dest='force_lto', action='store_true',
+ help='Use Link-Time Optimization instead of partial linking' +
+ ' when the compiler doesn\'t support using them together.')
AddLocalOption('--update-ref', dest='update_ref', action='store_true',
help='Update test reference outputs')
AddLocalOption('--verbose', dest='verbose', action='store_true',
help='Print full tool command lines')
+AddLocalOption('--without-python', dest='without_python',
+ action='store_true',
+ help='Build without Python configuration support')
+AddLocalOption('--without-tcmalloc', dest='without_tcmalloc',
+ action='store_true',
+ help='Disable linking against tcmalloc')
+AddLocalOption('--with-ubsan', dest='with_ubsan', action='store_true',
+ help='Build with Undefined Behavior Sanitizer if available')
+AddLocalOption('--with-asan', dest='with_asan', action='store_true',
+ help='Build with Address Sanitizer if available')
+
+if GetOption('no_lto') and GetOption('force_lto'):
+ print '--no-lto and --force-lto are mutually exclusive'
+ Exit(1)
termcap = get_termcap(GetOption('use_colors'))
# Set up the main build environment.
#
########################################################################
+
+# export TERM so that clang reports errors in color
use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH',
- 'LIBRARY_PATH', 'PATH', 'PYTHONPATH', 'RANLIB', 'SWIG' ])
+ 'LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH', 'PROTOC',
+ 'PYTHONPATH', 'RANLIB', 'TERM' ])
+
+use_prefixes = [
+ "ASAN_", # address sanitizer symbolizer path and settings
+ "CCACHE_", # ccache (caching compiler wrapper) configuration
+ "CCC_", # clang static analyzer configuration
+ "DISTCC_", # distcc (distributed compiler wrapper) configuration
+ "INCLUDE_SERVER_", # distcc pump server settings
+ "M5", # M5 configuration (e.g., path to kernels)
+ ]
use_env = {}
-for key,val in os.environ.iteritems():
- if key in use_vars or key.startswith("M5"):
+for key,val in sorted(os.environ.iteritems()):
+ if key in use_vars or \
+ any([key.startswith(prefix) for prefix in use_prefixes]):
use_env[key] = val
-main = Environment(ENV=use_env)
+# Tell scons to avoid implicit command dependencies to avoid issues
+# with the param wrappes being compiled twice (see
+# http://scons.tigris.org/issues/show_bug.cgi?id=2811)
+main = Environment(ENV=use_env, IMPLICIT_COMMAND_DEPENDENCIES=0)
main.Decider('MD5-timestamp')
main.root = Dir(".") # The current directory (where this file lives).
main.srcdir = Dir("src") # The source directory
+main_dict_keys = main.Dictionary().keys()
+
+# Check that we have a C/C++ compiler
+if not ('CC' in main_dict_keys and 'CXX' in main_dict_keys):
+ print "No C++ compiler installed (package g++ on Ubuntu and RedHat)"
+ Exit(1)
+
# add useful python code PYTHONPATH so it can be used by subprocesses
# as well
main.AppendENVPath('PYTHONPATH', extra_python_paths)
hgdir = main.root.Dir(".hg")
+
+style_message = """
+You're missing the gem5 style hook, which automatically checks your code
+against the gem5 style rules on %s.
+This script will now install the hook in your %s.
+Press enter to continue, or ctrl-c to abort: """
+
mercurial_style_message = """
You're missing the gem5 style hook, which automatically checks your code
-against the gem5 style rules on hg commit and qrefresh commands. This
-script will now install the hook in your .hg/hgrc file.
+against the gem5 style rules on hg commit and qrefresh commands.
+This script will now install the hook in your .hg/hgrc file.
+Press enter to continue, or ctrl-c to abort: """
+
+git_style_message = """
+You're missing the gem5 style or commit message hook. These hooks help
+to ensure that your code follows gem5's style rules on git commit.
+This script will now install the hook in your .git/hooks/ directory.
+Press enter to continue, or ctrl-c to abort: """
+
+mercurial_style_upgrade_message = """
+Your Mercurial style hooks are not up-to-date. This script will now
+try to automatically update them. A backup of your hgrc will be saved
+in .hg/hgrc.old.
Press enter to continue, or ctrl-c to abort: """
mercurial_style_hook = """
# The following lines were automatically added by gem5/SConstruct
# to provide the gem5 style-checking hooks
[extensions]
-style = %s/util/style.py
+hgstyle = %s/util/hgstyle.py
[hooks]
-pretxncommit.style = python:style.check_style
-pre-qrefresh.style = python:style.check_style
+pretxncommit.style = python:hgstyle.check_style
+pre-qrefresh.style = python:hgstyle.check_style
# End of SConstruct additions
""" % (main.root.abspath)
"""
# Check for style hook and prompt for installation if it's not there.
-# Skip this if --ignore-style was specified, there's no .hg dir to
-# install a hook in, or there's no interactive terminal to prompt.
-if not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty():
+# Skip this if --ignore-style was specified, there's no interactive
+# terminal to prompt, or no recognized revision control system can be
+# found.
+ignore_style = GetOption('ignore_style') or not sys.stdin.isatty()
+
+# Try wire up Mercurial to the style hooks
+if not ignore_style and hgdir.exists():
style_hook = True
+ style_hooks = tuple()
+ hgrc = hgdir.File('hgrc')
+ hgrc_old = hgdir.File('hgrc.old')
try:
from mercurial import ui
ui = ui.ui()
- ui.readconfig(hgdir.File('hgrc').abspath)
- style_hook = ui.config('hooks', 'pretxncommit.style', None) and \
- ui.config('hooks', 'pre-qrefresh.style', None)
+ ui.readconfig(hgrc.abspath)
+ style_hooks = (ui.config('hooks', 'pretxncommit.style', None),
+ ui.config('hooks', 'pre-qrefresh.style', None))
+ style_hook = all(style_hooks)
+ style_extension = ui.config('extensions', 'style', None)
except ImportError:
print mercurial_lib_not_found
- if not style_hook:
+ if "python:style.check_style" in style_hooks:
+ # Try to upgrade the style hooks
+ print mercurial_style_upgrade_message
+ # continue unless user does ctrl-c/ctrl-d etc.
+ try:
+ raw_input()
+ except:
+ print "Input exception, exiting scons.\n"
+ sys.exit(1)
+ shutil.copyfile(hgrc.abspath, hgrc_old.abspath)
+ re_style_hook = re.compile(r"^([^=#]+)\.style\s*=\s*([^#\s]+).*")
+ re_style_extension = re.compile("style\s*=\s*([^#\s]+).*")
+ old, new = open(hgrc_old.abspath, 'r'), open(hgrc.abspath, 'w')
+ for l in old:
+ m_hook = re_style_hook.match(l)
+ m_ext = re_style_extension.match(l)
+ if m_hook:
+ hook, check = m_hook.groups()
+ if check != "python:style.check_style":
+ print "Warning: %s.style is using a non-default " \
+ "checker: %s" % (hook, check)
+ if hook not in ("pretxncommit", "pre-qrefresh"):
+ print "Warning: Updating unknown style hook: %s" % hook
+
+ l = "%s.style = python:hgstyle.check_style\n" % hook
+ elif m_ext and m_ext.group(1) == style_extension:
+ l = "hgstyle = %s/util/hgstyle.py\n" % main.root.abspath
+
+ new.write(l)
+ elif not style_hook:
print mercurial_style_message,
# continue unless user does ctrl-c/ctrl-d etc.
try:
hgrc_path = '%s/.hg/hgrc' % main.root.abspath
print "Adding style hook to", hgrc_path, "\n"
try:
- hgrc = open(hgrc_path, 'a')
- hgrc.write(mercurial_style_hook)
- hgrc.close()
+ with open(hgrc_path, 'a') as f:
+ f.write(mercurial_style_hook)
except:
print "Error updating", hgrc_path
sys.exit(1)
+def install_git_style_hooks():
+ try:
+ gitdir = Dir(readCommand(
+ ["git", "rev-parse", "--git-dir"]).strip("\n"))
+ except Exception, e:
+ print "Warning: Failed to find git repo directory: %s" % e
+ return
+
+ git_hooks = gitdir.Dir("hooks")
+ def hook_exists(hook_name):
+ hook = git_hooks.File(hook_name)
+ return hook.exists()
+
+ def hook_install(hook_name, script):
+ hook = git_hooks.File(hook_name)
+ if hook.exists():
+ print "Warning: Can't install %s, hook already exists." % hook_name
+ return
+
+ if hook.islink():
+ print "Warning: Removing broken symlink for hook %s." % hook_name
+ os.unlink(hook.get_abspath())
+
+ if not git_hooks.exists():
+ mkdir(git_hooks.get_abspath())
+ git_hooks.clear()
+
+ abs_symlink_hooks = git_hooks.islink() and \
+ os.path.isabs(os.readlink(git_hooks.get_abspath()))
+
+ # Use a relative symlink if the hooks live in the source directory,
+ # and the hooks directory is not a symlink to an absolute path.
+ if hook.is_under(main.root) and not abs_symlink_hooks:
+ script_path = os.path.relpath(
+ os.path.realpath(script.get_abspath()),
+ os.path.realpath(hook.Dir(".").get_abspath()))
+ else:
+ script_path = script.get_abspath()
+
+ try:
+ os.symlink(script_path, hook.get_abspath())
+ except:
+ print "Error updating git %s hook" % hook_name
+ raise
+
+ if hook_exists("pre-commit") and hook_exists("commit-msg"):
+ return
+
+ print git_style_message,
+ try:
+ raw_input()
+ except:
+ print "Input exception, exiting scons.\n"
+ sys.exit(1)
+
+ git_style_script = File("util/git-pre-commit.py")
+ git_msg_script = File("ext/git-commit-msg")
+
+ hook_install("pre-commit", git_style_script)
+ hook_install("commit-msg", git_msg_script)
+
+# Try to wire up git to the style hooks
+if not ignore_style and main.root.Entry(".git").exists():
+ install_git_style_hooks()
###################################################
#
global_vars.AddVariables(
('CC', 'C compiler', environ.get('CC', main['CC'])),
('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])),
- ('SWIG', 'SWIG tool', environ.get('SWIG', main['SWIG'])),
+ ('PROTOC', 'protoc tool', environ.get('PROTOC', 'protoc')),
('BATCH', 'Use batch pool for build and tests', False),
('BATCH_CMD', 'Batch pool submission command name', 'qdo'),
('M5_BUILD_CACHE', 'Cache built objects in this directory', False),
main['CCCOMSTR'] = Transform("CC")
main['CXXCOMSTR'] = Transform("CXX")
main['ASCOMSTR'] = Transform("AS")
- main['SWIGCOMSTR'] = Transform("SWIG")
main['ARCOMSTR'] = Transform("AR", 0)
main['LINKCOMSTR'] = Transform("LINK", 0)
+ main['SHLINKCOMSTR'] = Transform("SHLINK", 0)
main['RANLIBCOMSTR'] = Transform("RANLIB", 0)
main['M4COMSTR'] = Transform("M4")
main['SHCCCOMSTR'] = Transform("SHCC")
main['SHCXXCOMSTR'] = Transform("SHCXX")
Export('MakeAction')
+# Initialize the Link-Time Optimization (LTO) flags
+main['LTO_CCFLAGS'] = []
+main['LTO_LDFLAGS'] = []
+
+# According to the readme, tcmalloc works best if the compiler doesn't
+# assume that we're using the builtin malloc and friends. These flags
+# are compiler-specific, so we need to set them after we detect which
+# compiler we're using.
+main['TCMALLOC_CCFLAGS'] = []
+
CXX_version = readCommand([main['CXX'],'--version'], exception=False)
CXX_V = readCommand([main['CXX'],'-V'], exception=False)
main['GCC'] = CXX_version and CXX_version.find('g++') >= 0
-main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0
-main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0
main['CLANG'] = CXX_version and CXX_version.find('clang') >= 0
-if main['GCC'] + main['SUNCC'] + main['ICC'] + main['CLANG'] > 1:
+if main['GCC'] + main['CLANG'] > 1:
print 'Error: How can we have two at the same time?'
Exit(1)
# Set up default C++ compiler flags
-if main['GCC']:
+if main['GCC'] or main['CLANG']:
+ # As gcc and clang share many flags, do the common parts here
main.Append(CCFLAGS=['-pipe'])
main.Append(CCFLAGS=['-fno-strict-aliasing'])
- main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
- # Read the GCC version to check for versions with bugs
- # Note CCVERSION doesn't work here because it is run with the CC
- # before we override it from the command line
+ # Enable -Wall and -Wextra and then disable the few warnings that
+ # we consistently violate
+ main.Append(CCFLAGS=['-Wall', '-Wundef', '-Wextra',
+ '-Wno-sign-compare', '-Wno-unused-parameter'])
+ # We always compile using C++11
+ main.Append(CXXFLAGS=['-std=c++11'])
+ if sys.platform.startswith('freebsd'):
+ main.Append(CCFLAGS=['-I/usr/local/include'])
+ main.Append(CXXFLAGS=['-I/usr/local/include'])
+
+ main['FILTER_PSHLINKFLAGS'] = lambda x: str(x).replace(' -shared', '')
+ main['PSHLINKFLAGS'] = main.subst('${FILTER_PSHLINKFLAGS(SHLINKFLAGS)}')
+ main['PLINKFLAGS'] = main.subst('${LINKFLAGS}')
+ shared_partial_flags = ['-r', '-nostdlib']
+ main.Append(PSHLINKFLAGS=shared_partial_flags)
+ main.Append(PLINKFLAGS=shared_partial_flags)
+else:
+ print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal,
+ print "Don't know what compiler options to use for your compiler."
+ print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX']
+ print termcap.Yellow + ' version:' + termcap.Normal,
+ if not CXX_version:
+ print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\
+ termcap.Normal
+ else:
+ print CXX_version.replace('\n', '<nl>')
+ print " If you're trying to use a compiler other than GCC"
+ print " or clang, there appears to be something wrong with your"
+ print " environment."
+ print " "
+ print " If you are trying to use a compiler other than those listed"
+ print " above you will need to ease fix SConstruct and "
+ print " src/SConscript to support that compiler."
+ Exit(1)
+
+if main['GCC']:
+ # Check for a supported version of gcc. >= 4.8 is chosen for its
+ # level of c++11 support. See
+ # http://gcc.gnu.org/projects/cxx0x.html for details.
gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
+ if compareVersions(gcc_version, "4.8") < 0:
+ print 'Error: gcc version 4.8 or newer required.'
+ print ' Installed version:', gcc_version
+ Exit(1)
+
main['GCC_VERSION'] = gcc_version
- if not compareVersions(gcc_version, '4.4.1') or \
- not compareVersions(gcc_version, '4.4.2'):
- print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
- main.Append(CCFLAGS=['-fno-tree-vectorize'])
- if compareVersions(gcc_version, '4.6') >= 0:
- main.Append(CXXFLAGS=['-std=c++0x'])
-elif main['ICC']:
- pass #Fix me... add warning flags once we clean up icc warnings
-elif main['SUNCC']:
- main.Append(CCFLAGS=['-Qoption ccfe'])
- main.Append(CCFLAGS=['-features=gcc'])
- main.Append(CCFLAGS=['-features=extensions'])
- main.Append(CCFLAGS=['-library=stlport4'])
- main.Append(CCFLAGS=['-xar'])
- #main.Append(CCFLAGS=['-instances=semiexplicit'])
+
+ if compareVersions(gcc_version, '4.9') >= 0:
+ # Incremental linking with LTO is currently broken in gcc versions
+ # 4.9 and above. A version where everything works completely hasn't
+ # yet been identified.
+ #
+ # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67548
+ main['BROKEN_INCREMENTAL_LTO'] = True
+ if compareVersions(gcc_version, '6.0') >= 0:
+ # gcc versions 6.0 and greater accept an -flinker-output flag which
+ # selects what type of output the linker should generate. This is
+ # necessary for incremental lto to work, but is also broken in
+ # current versions of gcc. It may not be necessary in future
+ # versions. We add it here since it might be, and as a reminder that
+ # it exists. It's excluded if lto is being forced.
+ #
+ # https://gcc.gnu.org/gcc-6/changes.html
+ # https://gcc.gnu.org/ml/gcc-patches/2015-11/msg03161.html
+ # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69866
+ if not GetOption('force_lto'):
+ main.Append(PSHLINKFLAGS='-flinker-output=rel')
+ main.Append(PLINKFLAGS='-flinker-output=rel')
+
+ # gcc from version 4.8 and above generates "rep; ret" instructions
+ # to avoid performance penalties on certain AMD chips. Older
+ # assemblers detect this as an error, "Error: expecting string
+ # instruction after `rep'"
+ as_version_raw = readCommand([main['AS'], '-v', '/dev/null',
+ '-o', '/dev/null'],
+ exception=False).split()
+
+ # version strings may contain extra distro-specific
+ # qualifiers, so play it safe and keep only what comes before
+ # the first hyphen
+ as_version = as_version_raw[-1].split('-')[0] if as_version_raw else None
+
+ if not as_version or compareVersions(as_version, "2.23") < 0:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: This combination of gcc and binutils have' + \
+ ' known incompatibilities.\n' + \
+ ' If you encounter build problems, please update ' + \
+ 'binutils to 2.23.' + \
+ termcap.Normal
+
+ # Make sure we warn if the user has requested to compile with the
+ # Undefined Benahvior Sanitizer and this version of gcc does not
+ # support it.
+ if GetOption('with_ubsan') and \
+ compareVersions(gcc_version, '4.9') < 0:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: UBSan is only supported using gcc 4.9 and later.' + \
+ termcap.Normal
+
+ disable_lto = GetOption('no_lto')
+ if not disable_lto and main.get('BROKEN_INCREMENTAL_LTO', False) and \
+ not GetOption('force_lto'):
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: Your compiler doesn\'t support incremental linking' + \
+ ' and lto at the same time, so lto is being disabled. To force' + \
+ ' lto on anyway, use the --force-lto option. That will disable' + \
+ ' partial linking.' + \
+ termcap.Normal
+ disable_lto = True
+
+ # Add the appropriate Link-Time Optimization (LTO) flags
+ # unless LTO is explicitly turned off. Note that these flags
+ # are only used by the fast target.
+ if not disable_lto:
+ # Pass the LTO flag when compiling to produce GIMPLE
+ # output, we merely create the flags here and only append
+ # them later
+ main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')]
+
+ # Use the same amount of jobs for LTO as we are running
+ # scons with
+ main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs')]
+
+ main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc',
+ '-fno-builtin-realloc', '-fno-builtin-free'])
+
+ # add option to check for undeclared overrides
+ if compareVersions(gcc_version, "5.0") > 0:
+ main.Append(CCFLAGS=['-Wno-error=suggest-override'])
+
elif main['CLANG']:
+ # Check for a supported version of clang, >= 3.1 is needed to
+ # support similar features as gcc 4.8. See
+ # http://clang.llvm.org/cxx_status.html for details
clang_version_re = re.compile(".* version (\d+\.\d+)")
- clang_version_match = clang_version_re.match(CXX_version)
+ clang_version_match = clang_version_re.search(CXX_version)
if (clang_version_match):
clang_version = clang_version_match.groups()[0]
- if compareVersions(clang_version, "2.9") < 0:
- print 'Error: clang version 2.9 or newer required.'
+ if compareVersions(clang_version, "3.1") < 0:
+ print 'Error: clang version 3.1 or newer required.'
print ' Installed version:', clang_version
Exit(1)
else:
print 'Error: Unable to determine clang version.'
Exit(1)
- main.Append(CCFLAGS=['-pipe'])
- main.Append(CCFLAGS=['-fno-strict-aliasing'])
- main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef'])
- main.Append(CCFLAGS=['-Wno-tautological-compare'])
- main.Append(CCFLAGS=['-Wno-self-assign'])
- # Ruby makes frequent use of extraneous parantheses in the printing
- # of if-statements
- main.Append(CCFLAGS=['-Wno-parentheses'])
-
- if compareVersions(clang_version, "3") >= 0:
- main.Append(CXXFLAGS=['-std=c++0x'])
+ # clang has a few additional warnings that we disable, extraneous
+ # parantheses are allowed due to Ruby's printing of the AST,
+ # finally self assignments are allowed as the generated CPU code
+ # is relying on this
+ main.Append(CCFLAGS=['-Wno-parentheses',
+ '-Wno-self-assign',
+ # Some versions of libstdc++ (4.8?) seem to
+ # use struct hash and class hash
+ # interchangeably.
+ '-Wno-mismatched-tags',
+ ])
+
+ main.Append(TCMALLOC_CCFLAGS=['-fno-builtin'])
+
+ # On Mac OS X/Darwin we need to also use libc++ (part of XCode) as
+ # opposed to libstdc++, as the later is dated.
+ if sys.platform == "darwin":
+ main.Append(CXXFLAGS=['-stdlib=libc++'])
+ main.Append(LIBS=['c++'])
+
+ # On FreeBSD we need libthr.
+ if sys.platform.startswith('freebsd'):
+ main.Append(LIBS=['thr'])
+
else:
print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal,
print "Don't know what compiler options to use for your compiler."
termcap.Normal
else:
print CXX_version.replace('\n', '<nl>')
- print " If you're trying to use a compiler other than GCC, ICC, SunCC,"
+ print " If you're trying to use a compiler other than GCC"
print " or clang, there appears to be something wrong with your"
print " environment."
print " "
# cygwin has some header file issues...
main.Append(CCFLAGS=["-Wno-uninitialized"])
-# Check for SWIG
-if not main.has_key('SWIG'):
- print 'Error: SWIG utility not found.'
- print ' Please install (see http://www.swig.org) and retry.'
- Exit(1)
-
-# Check for appropriate SWIG version
-swig_version = readCommand([main['SWIG'], '-version'], exception='').split()
-# First 3 words should be "SWIG Version x.y.z"
-if len(swig_version) < 3 or \
- swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
- print 'Error determining SWIG version.'
- Exit(1)
-
-min_swig_version = '1.3.34'
-if compareVersions(swig_version[2], min_swig_version) < 0:
- print 'Error: SWIG version', min_swig_version, 'or newer required.'
- print ' Installed version:', swig_version[2]
- Exit(1)
-
-# Set up SWIG flags & scanner
-swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS')
-main.Append(SWIGFLAGS=swig_flags)
+# Check for the protobuf compiler
+protoc_version = readCommand([main['PROTOC'], '--version'],
+ exception='').split()
-# filter out all existing swig scanners, they mess up the dependency
-# stuff for some reason
-scanners = []
-for scanner in main['SCANNERS']:
- skeys = scanner.skeys
- if skeys == '.i':
- continue
-
- if isinstance(skeys, (list, tuple)) and '.i' in skeys:
- continue
-
- scanners.append(scanner)
-
-# add the new swig scanner that we like better
-from SCons.Scanner import ClassicCPP as CPPScanner
-swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")'
-scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re))
-
-# replace the scanners list that has what we want
-main['SCANNERS'] = scanners
-
-# Add a custom Check function to the Configure context so that we can
-# figure out if the compiler adds leading underscores to global
-# variables. This is needed for the autogenerated asm files that we
-# use for embedding the python code.
-def CheckLeading(context):
- context.Message("Checking for leading underscore in global variables...")
- # 1) Define a global variable called x from asm so the C compiler
- # won't change the symbol at all.
- # 2) Declare that variable.
- # 3) Use the variable
- #
- # If the compiler prepends an underscore, this will successfully
- # link because the external symbol 'x' will be called '_x' which
- # was defined by the asm statement. If the compiler does not
- # prepend an underscore, this will not successfully link because
- # '_x' will have been defined by assembly, while the C portion of
- # the code will be trying to use 'x'
- ret = context.TryLink('''
- asm(".globl _x; _x: .byte 0");
- extern int x;
- int main() { return x; }
- ''', extension=".c")
- context.env.Append(LEADING_UNDERSCORE=ret)
+# First two words should be "libprotoc x.y.z"
+if len(protoc_version) < 2 or protoc_version[0] != 'libprotoc':
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: Protocol buffer compiler (protoc) not found.\n' + \
+ ' Please install protobuf-compiler for tracing support.' + \
+ termcap.Normal
+ main['PROTOC'] = False
+else:
+ # Based on the availability of the compress stream wrappers,
+ # require 2.1.0
+ min_protoc_version = '2.1.0'
+ if compareVersions(protoc_version[1], min_protoc_version) < 0:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: protoc version', min_protoc_version, \
+ 'or newer required.\n' + \
+ ' Installed version:', protoc_version[1], \
+ termcap.Normal
+ main['PROTOC'] = False
+ else:
+ # Attempt to determine the appropriate include path and
+ # library path using pkg-config, that means we also need to
+ # check for pkg-config. Note that it is possible to use
+ # protobuf without the involvement of pkg-config. Later on we
+ # check go a library config check and at that point the test
+ # will fail if libprotobuf cannot be found.
+ if readCommand(['pkg-config', '--version'], exception=''):
+ try:
+ # Attempt to establish what linking flags to add for protobuf
+ # using pkg-config
+ main.ParseConfig('pkg-config --cflags --libs-only-L protobuf')
+ except:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: pkg-config could not get protobuf flags.' + \
+ termcap.Normal
+
+
+# Check for 'timeout' from GNU coreutils. If present, regressions will
+# be run with a time limit. We require version 8.13 since we rely on
+# support for the '--foreground' option.
+if sys.platform.startswith('freebsd'):
+ timeout_lines = readCommand(['gtimeout', '--version'],
+ exception='').splitlines()
+else:
+ timeout_lines = readCommand(['timeout', '--version'],
+ exception='').splitlines()
+# Get the first line and tokenize it
+timeout_version = timeout_lines[0].split() if timeout_lines else []
+main['TIMEOUT'] = timeout_version and \
+ compareVersions(timeout_version[-1], '8.13') >= 0
+
+# Add a custom Check function to test for structure members.
+def CheckMember(context, include, decl, member, include_quotes="<>"):
+ context.Message("Checking for member %s in %s..." %
+ (member, decl))
+ text = """
+#include %(header)s
+int main(){
+ %(decl)s test;
+ (void)test.%(member)s;
+ return 0;
+};
+""" % { "header" : include_quotes[0] + include + include_quotes[1],
+ "decl" : decl,
+ "member" : member,
+ }
+
+ ret = context.TryCompile(text, extension=".cc")
context.Result(ret)
return ret
conf = Configure(main,
conf_dir = joinpath(build_root, '.scons_config'),
log_file = joinpath(build_root, 'scons_config.log'),
- custom_tests = { 'CheckLeading' : CheckLeading })
-
-# Check for leading underscores. Don't really need to worry either
-# way so don't need to check the return code.
-conf.CheckLeading()
+ custom_tests = {
+ 'CheckMember' : CheckMember,
+ })
# Check if we should compile a 64 bit binary on Mac OS X/Darwin
try:
conf = NullConf(main)
-# Find Python include and library directories for embedding the
-# interpreter. For consistency, we will use the same Python
-# installation used to run scons (and thus this script). If you want
-# to link in an alternate version, see above for instructions on how
-# to invoke scons with a different copy of the Python interpreter.
-from distutils import sysconfig
-
-py_getvar = sysconfig.get_config_var
-
-py_debug = getattr(sys, 'pydebug', False)
-py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "")
-
-py_general_include = sysconfig.get_python_inc()
-py_platform_include = sysconfig.get_python_inc(plat_specific=True)
-py_includes = [ py_general_include ]
-if py_platform_include != py_general_include:
- py_includes.append(py_platform_include)
-
-py_lib_path = [ py_getvar('LIBDIR') ]
-# add the prefix/lib/pythonX.Y/config dir, but only if there is no
-# shared library in prefix/lib/.
-if not py_getvar('Py_ENABLE_SHARED'):
- py_lib_path.append(py_getvar('LIBPL'))
-
-py_libs = []
-for lib in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split():
- if not lib.startswith('-l'):
- # Python requires some special flags to link (e.g. -framework
- # common on OS X systems), assume appending preserves order
- main.Append(LINKFLAGS=[lib])
- else:
- lib = lib[2:]
- if lib not in py_libs:
- py_libs.append(lib)
-py_libs.append(py_version)
-
-main.Append(CPPPATH=py_includes)
-main.Append(LIBPATH=py_lib_path)
-
# Cache build files in the supplied directory.
if main['M5_BUILD_CACHE']:
print 'Using build cache located at', main['M5_BUILD_CACHE']
CacheDir(main['M5_BUILD_CACHE'])
-
-# verify that this stuff works
-if not conf.CheckHeader('Python.h', '<>'):
- print "Error: can't find Python.h header in", py_includes
- Exit(1)
-
-for lib in py_libs:
- if not conf.CheckLib(lib):
- print "Error: can't find library %s required by python" % lib
+main['USE_PYTHON'] = not GetOption('without_python')
+if main['USE_PYTHON']:
+ # Find Python include and library directories for embedding the
+ # interpreter. We rely on python-config to resolve the appropriate
+ # includes and linker flags. ParseConfig does not seem to understand
+ # the more exotic linker flags such as -Xlinker and -export-dynamic so
+ # we add them explicitly below. If you want to link in an alternate
+ # version of python, see above for instructions on how to invoke
+ # scons with the appropriate PATH set.
+ #
+ # First we check if python2-config exists, else we use python-config
+ python_config = readCommand(['which', 'python2-config'],
+ exception='').strip()
+ if not os.path.exists(python_config):
+ python_config = readCommand(['which', 'python-config'],
+ exception='').strip()
+ py_includes = readCommand([python_config, '--includes'],
+ exception='').split()
+ # Strip the -I from the include folders before adding them to the
+ # CPPPATH
+ main.Append(CPPPATH=map(lambda inc: inc[2:], py_includes))
+
+ # Read the linker flags and split them into libraries and other link
+ # flags. The libraries are added later through the call the CheckLib.
+ py_ld_flags = readCommand([python_config, '--ldflags'],
+ exception='').split()
+ py_libs = []
+ for lib in py_ld_flags:
+ if not lib.startswith('-l'):
+ main.Append(LINKFLAGS=[lib])
+ else:
+ lib = lib[2:]
+ if lib not in py_libs:
+ py_libs.append(lib)
+
+ # verify that this stuff works
+ if not conf.CheckHeader('Python.h', '<>'):
+ print "Error: can't find Python.h header in", py_includes
+ print "Install Python headers (package python-dev on Ubuntu and RedHat)"
Exit(1)
+ for lib in py_libs:
+ if not conf.CheckLib(lib):
+ print "Error: can't find library %s required by python" % lib
+ Exit(1)
+
# On Solaris you need to use libsocket for socket ops
if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'):
if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'):
print ' Please install zlib and try again.'
Exit(1)
+# If we have the protobuf compiler, also make sure we have the
+# development libraries. If the check passes, libprotobuf will be
+# automatically added to the LIBS environment variable. After
+# this, we can use the HAVE_PROTOBUF flag to determine if we have
+# got both protoc and libprotobuf available.
+main['HAVE_PROTOBUF'] = main['PROTOC'] and \
+ conf.CheckLibWithHeader('protobuf', 'google/protobuf/message.h',
+ 'C++', 'GOOGLE_PROTOBUF_VERIFY_VERSION;')
+
+# If we have the compiler but not the library, print another warning.
+if main['PROTOC'] and not main['HAVE_PROTOBUF']:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: did not find protocol buffer library and/or headers.\n' + \
+ ' Please install libprotobuf-dev for tracing support.' + \
+ termcap.Normal
+
# Check for librt.
have_posix_clock = \
conf.CheckLibWithHeader(None, 'time.h', 'C',
conf.CheckLibWithHeader('rt', 'time.h', 'C',
'clock_nanosleep(0,0,NULL,NULL);')
-if conf.CheckLib('tcmalloc_minimal'):
- have_tcmalloc = True
-else:
- have_tcmalloc = False
+have_posix_timers = \
+ conf.CheckLibWithHeader([None, 'rt'], [ 'time.h', 'signal.h' ], 'C',
+ 'timer_create(CLOCK_MONOTONIC, NULL, NULL);')
+
+if not GetOption('without_tcmalloc'):
+ if conf.CheckLib('tcmalloc'):
+ main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS'])
+ elif conf.CheckLib('tcmalloc_minimal'):
+ main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS'])
+ else:
+ print termcap.Yellow + termcap.Bold + \
+ "You can get a 12% performance improvement by "\
+ "installing tcmalloc (libgoogle-perftools-dev package "\
+ "on Ubuntu or RedHat)." + termcap.Normal
+
+
+# Detect back trace implementations. The last implementation in the
+# list will be used by default.
+backtrace_impls = [ "none" ]
+
+if conf.CheckLibWithHeader(None, 'execinfo.h', 'C',
+ 'backtrace_symbols_fd((void*)0, 0, 0);'):
+ backtrace_impls.append("glibc")
+elif conf.CheckLibWithHeader('execinfo', 'execinfo.h', 'C',
+ 'backtrace_symbols_fd((void*)0, 0, 0);'):
+ # NetBSD and FreeBSD need libexecinfo.
+ backtrace_impls.append("glibc")
+ main.Append(LIBS=['execinfo'])
+
+if backtrace_impls[-1] == "none":
+ default_backtrace_impl = "none"
print termcap.Yellow + termcap.Bold + \
- "You can get a 12% performance improvement by installing tcmalloc "\
- "(libgoogle-perftools-dev package on Ubuntu or RedHat)." + \
- termcap.Normal
+ "No suitable back trace implementation found." + \
+ termcap.Normal
if not have_posix_clock:
print "Can't find library for POSIX clocks."
print "Warning: Header file <fenv.h> not found."
print " This host has no IEEE FP rounding mode control."
+# Check if we should enable KVM-based hardware virtualization. The API
+# we rely on exists since version 2.6.36 of the kernel, but somehow
+# the KVM_API_VERSION does not reflect the change. We test for one of
+# the types as a fall back.
+have_kvm = conf.CheckHeader('linux/kvm.h', '<>')
+if not have_kvm:
+ print "Info: Compatible header file <linux/kvm.h> not found, " \
+ "disabling KVM support."
+
+# Check if the TUN/TAP driver is available.
+have_tuntap = conf.CheckHeader('linux/if_tun.h', '<>')
+if not have_tuntap:
+ print "Info: Compatible header file <linux/if_tun.h> not found."
+
+# x86 needs support for xsave. We test for the structure here since we
+# won't be able to run new tests by the time we know which ISA we're
+# targeting.
+have_kvm_xsave = conf.CheckTypeSize('struct kvm_xsave',
+ '#include <linux/kvm.h>') != 0
+
+# Check if the requested target ISA is compatible with the host
+def is_isa_kvm_compatible(isa):
+ try:
+ import platform
+ host_isa = platform.machine()
+ except:
+ print "Warning: Failed to determine host ISA."
+ return False
+
+ if not have_posix_timers:
+ print "Warning: Can not enable KVM, host seems to lack support " \
+ "for POSIX timers"
+ return False
+
+ if isa == "arm":
+ return host_isa in ( "armv7l", "aarch64" )
+ elif isa == "x86":
+ if host_isa != "x86_64":
+ return False
+
+ if not have_kvm_xsave:
+ print "KVM on x86 requires xsave support in kernel headers."
+ return False
+
+ return True
+ else:
+ return False
+
+
+# Check if the exclude_host attribute is available. We want this to
+# get accurate instruction counts in KVM.
+main['HAVE_PERF_ATTR_EXCLUDE_HOST'] = conf.CheckMember(
+ 'linux/perf_event.h', 'struct perf_event_attr', 'exclude_host')
+
+
######################################################################
#
# Finish the configuration
# Define the universe of supported ISAs
all_isa_list = [ ]
+all_gpu_isa_list = [ ]
Export('all_isa_list')
+Export('all_gpu_isa_list')
class CpuModel(object):
'''The CpuModel class encapsulates everything the ISA parser needs to
# Dict of available CPU model objects. Accessible as CpuModel.dict.
dict = {}
- list = []
- defaults = []
# Constructor. Automatically adds models to CpuModel.dict.
- def __init__(self, name, filename, includes, strings, default=False):
+ def __init__(self, name, default=False):
self.name = name # name of model
- self.filename = filename # filename for output exec code
- self.includes = includes # include files needed in exec file
- # The 'strings' dict holds all the per-CPU symbols we can
- # substitute into templates etc.
- self.strings = strings
# This cpu is enabled by default
self.default = default
if name in CpuModel.dict:
raise AttributeError, "CpuModel '%s' already registered" % name
CpuModel.dict[name] = self
- CpuModel.list.append(name)
Export('CpuModel')
export_vars = []
Export('export_vars')
+# For Ruby
+all_protocols = []
+Export('all_protocols')
+protocol_dirs = []
+Export('protocol_dirs')
+slicc_includes = []
+Export('slicc_includes')
+
# Walk the tree and execute all SConsopts scripts that wil add to the
# above variables
-if not GetOption('verbose'):
+if GetOption('verbose'):
print "Reading SConsopts"
for bdir in [ base_dir ] + extras_dir_list:
if not isdir(bdir):
SConscript(joinpath(root, 'SConsopts'))
all_isa_list.sort()
+all_gpu_isa_list.sort()
sticky_vars.AddVariables(
EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list),
+ EnumVariable('TARGET_GPU_ISA', 'Target GPU ISA', 'hsail', all_gpu_isa_list),
ListVariable('CPU_MODELS', 'CPU models',
sorted(n for n,m in CpuModel.dict.iteritems() if m.default),
- sorted(CpuModel.list)),
+ sorted(CpuModel.dict.keys())),
BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger',
False),
BoolVariable('SS_COMPATIBLE_FP',
BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock),
BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False),
+ BoolVariable('USE_KVM', 'Enable hardware virtualized (KVM) CPU models', have_kvm),
+ BoolVariable('USE_TUNTAP',
+ 'Enable using a tap device to bridge to the host network',
+ have_tuntap),
+ BoolVariable('BUILD_GPU', 'Build the compute-GPU model', False),
+ EnumVariable('PROTOCOL', 'Coherence protocol for Ruby', 'None',
+ all_protocols),
+ EnumVariable('BACKTRACE_IMPL', 'Post-mortem dump implementation',
+ backtrace_impls[-1], backtrace_impls)
)
# These variables get exported to #defines in config/*.hh (see src/SConscript).
-export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP',
- 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
+export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', 'TARGET_ISA', 'TARGET_GPU_ISA',
+ 'CP_ANNOTATE', 'USE_POSIX_CLOCK', 'USE_KVM', 'USE_TUNTAP',
+ 'PROTOCOL', 'HAVE_PROTOBUF', 'HAVE_PERF_ATTR_EXCLUDE_HOST']
###################################################
#
main.Append(BUILDERS = { 'ConfigFile' : config_builder })
-# libelf build is shared across all configs in the build root.
-main.SConscript('ext/libelf/SConscript',
- variant_dir = joinpath(build_root, 'libelf'))
+###################################################
+#
+# Builders for static and shared partially linked object files.
+#
+###################################################
-# gzstream build is shared across all configs in the build root.
-main.SConscript('ext/gzstream/SConscript',
- variant_dir = joinpath(build_root, 'gzstream'))
+partial_static_builder = Builder(action=SCons.Defaults.LinkAction,
+ src_suffix='$OBJSUFFIX',
+ src_builder=['StaticObject', 'Object'],
+ LINKFLAGS='$PLINKFLAGS',
+ LIBS='')
+
+def partial_shared_emitter(target, source, env):
+ for tgt in target:
+ tgt.attributes.shared = 1
+ return (target, source)
+partial_shared_builder = Builder(action=SCons.Defaults.ShLinkAction,
+ emitter=partial_shared_emitter,
+ src_suffix='$SHOBJSUFFIX',
+ src_builder='SharedObject',
+ SHLINKFLAGS='$PSHLINKFLAGS',
+ LIBS='')
+
+main.Append(BUILDERS = { 'PartialShared' : partial_shared_builder,
+ 'PartialStatic' : partial_static_builder })
+
+# builds in ext are shared across all configs in the build root.
+ext_dir = abspath(joinpath(str(main.root), 'ext'))
+ext_build_dirs = []
+for root, dirs, files in os.walk(ext_dir):
+ if 'SConscript' in files:
+ build_dir = os.path.relpath(root, ext_dir)
+ ext_build_dirs.append(build_dir)
+ main.SConscript(joinpath(root, 'SConscript'),
+ variant_dir=joinpath(build_root, build_dir))
+
+main.Prepend(CPPPATH=Dir('ext/pybind11/include/'))
###################################################
#
-# This function is used to set up a directory with switching headers
+# This builder and wrapper method are used to set up a directory with
+# switching headers. Those are headers which are in a generic location and
+# that include more specific headers from a directory chosen at build time
+# based on the current build settings.
#
###################################################
-main['ALL_ISA_LIST'] = all_isa_list
-def make_switching_dir(dname, switch_headers, env):
- # Generate the header. target[0] is the full path of the output
- # header to generate. 'source' is a dummy variable, since we get the
- # list of ISAs from env['ALL_ISA_LIST'].
- def gen_switch_hdr(target, source, env):
- fname = str(target[0])
- f = open(fname, 'w')
- isa = env['TARGET_ISA'].lower()
- print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname))
- f.close()
-
- # Build SCons Action object. 'varlist' specifies env vars that this
- # action depends on; when env['ALL_ISA_LIST'] changes these actions
- # should get re-executed.
- switch_hdr_action = MakeAction(gen_switch_hdr,
- Transform("GENERATE"), varlist=['ALL_ISA_LIST'])
-
- # Instantiate actions for each header
- for hdr in switch_headers:
- env.Command(hdr, [], switch_hdr_action)
-Export('make_switching_dir')
+def build_switching_header(target, source, env):
+ path = str(target[0])
+ subdir = str(source[0])
+ dp, fp = os.path.split(path)
+ dp = os.path.relpath(os.path.realpath(dp),
+ os.path.realpath(env['BUILDDIR']))
+ with open(path, 'w') as hdr:
+ print >>hdr, '#include "%s/%s/%s"' % (dp, subdir, fp)
+
+switching_header_action = MakeAction(build_switching_header,
+ Transform('GENERATE'))
+
+switching_header_builder = Builder(action=switching_header_action,
+ source_factory=Value,
+ single_source=True)
+
+main.Append(BUILDERS = { 'SwitchingHeader': switching_header_builder })
+
+def switching_headers(self, headers, source):
+ for header in headers:
+ self.SwitchingHeader(header, source)
+
+main.AddMethod(switching_headers, 'SwitchingHeaders')
+
+# all-isas -> all-deps -> all-environs -> all_targets
+main.Alias('#all-isas', [])
+main.Alias('#all-deps', '#all-isas')
+
+# Dummy target to ensure all environments are created before telling
+# SCons what to actually make (the command line arguments). We attach
+# them to the dependence graph after the environments are complete.
+ORIG_BUILD_TARGETS = list(BUILD_TARGETS) # force a copy; gets closure to work.
+def environsComplete(target, source, env):
+ for t in ORIG_BUILD_TARGETS:
+ main.Depends('#all-targets', t)
+
+# Each build/* switching_dir attaches its *-environs target to #all-environs.
+main.Append(BUILDERS = {'CompleteEnvirons' :
+ Builder(action=MakeAction(environsComplete, None))})
+main.CompleteEnvirons('#all-environs', [])
+
+def doNothing(**ignored): pass
+main.Append(BUILDERS = {'Dummy': Builder(action=MakeAction(doNothing, None))})
+
+# The final target to which all the original targets ultimately get attached.
+main.Dummy('#all-targets', '#all-environs')
+BUILD_TARGETS[:] = ['#all-targets']
###################################################
#
#
###################################################
+def variant_name(path):
+ return os.path.basename(path).lower().replace('_', '-')
+main['variant_name'] = variant_name
+main['VARIANT_NAME'] = '${variant_name(BUILDDIR)}'
+
for variant_path in variant_paths:
- print "Building in", variant_path
+ if not GetOption('silent'):
+ print "Building in", variant_path
# Make a copy of the build-root environment to use for this config.
env = main.Clone()
current_vars_file = joinpath(build_root, 'variables', variant_dir)
if isfile(current_vars_file):
sticky_vars.files.append(current_vars_file)
- print "Using saved variables file %s" % current_vars_file
+ if not GetOption('silent'):
+ print "Using saved variables file %s" % current_vars_file
+ elif variant_dir in ext_build_dirs:
+ # Things in ext are built without a variant directory.
+ continue
else:
# Build dir-specific variables file doesn't exist.
if env['EFENCE']:
env.Append(LIBS=['efence'])
+ if env['USE_KVM']:
+ if not have_kvm:
+ print "Warning: Can not enable KVM, host seems to lack KVM support"
+ env['USE_KVM'] = False
+ elif not is_isa_kvm_compatible(env['TARGET_ISA']):
+ print "Info: KVM support disabled due to unsupported host and " \
+ "target ISA combination"
+ env['USE_KVM'] = False
+
+ if env['USE_TUNTAP']:
+ if not have_tuntap:
+ print "Warning: Can't connect EtherTap with a tap device."
+ env['USE_TUNTAP'] = False
+
+ if env['BUILD_GPU']:
+ env.Append(CPPDEFINES=['BUILD_GPU'])
+
+ # Warn about missing optional functionality
+ if env['USE_KVM']:
+ if not main['HAVE_PERF_ATTR_EXCLUDE_HOST']:
+ print "Warning: perf_event headers lack support for the " \
+ "exclude_host attribute. KVM instruction counts will " \
+ "be inaccurate."
+
# Save sticky variable settings back to current variables file
sticky_vars.Save(current_vars_file, env)
if env['USE_SSE2']:
env.Append(CCFLAGS=['-msse2'])
- if have_tcmalloc:
- env.Append(LIBS=['tcmalloc_minimal'])
-
# The src/SConscript file sets up the build rules in 'env' according
# to the configured variables. It returns a list of environments,
# one for each variant build (debug, opt, etc.)
- envList = SConscript('src/SConscript', variant_dir = variant_path,
- exports = 'env')
-
- # Set up the regression tests for each build.
- for e in envList:
- SConscript('tests/SConscript',
- variant_dir = joinpath(variant_path, 'tests', e.Label),
- exports = { 'env' : e }, duplicate = False)
+ SConscript('src/SConscript', variant_dir = variant_path, exports = 'env')
+
+def pairwise(iterable):
+ "s -> (s0,s1), (s1,s2), (s2, s3), ..."
+ a, b = itertools.tee(iterable)
+ b.next()
+ return itertools.izip(a, b)
+
+variant_names = [variant_name(path) for path in variant_paths]
+
+# Create false dependencies so SCons will parse ISAs, establish
+# dependencies, and setup the build Environments serially. Either
+# SCons (likely) and/or our SConscripts (possibly) cannot cope with -j
+# greater than 1. It appears to be standard race condition stuff; it
+# doesn't always fail, but usually, and the behaviors are different.
+# Every time I tried to remove this, builds would fail in some
+# creative new way. So, don't do that. You'll want to, though, because
+# tests/SConscript takes a long time to make its Environments.
+for t1, t2 in pairwise(sorted(variant_names)):
+ main.Depends('#%s-deps' % t2, '#%s-deps' % t1)
+ main.Depends('#%s-environs' % t2, '#%s-environs' % t1)
# base help text
Help('''
projects / gem5.git / blobdiff