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gem5/build/SConstruct
Steve Reinhardt c5c76cea98 Make CPU_MODELS a sticky build option. 
This causes a crash if you're using scons 0.96.1 *and* you specify
more than one CPU model.  Since the .isa scanner now works with 0.96.91
then upgrading should not be an issue.  For now we're only using one CPU
model (SimpleCPU) so there isn't even a pressing need to upgrade yet.

build/SConstruct:
    Make CPU_MODELS a sticky option.
    This causes a crash if you're using scons 0.96.1 *and* you specify
    more than one CPU model.  Since the .isa scanner now works with 0.96.91
    then upgrading should not be an issue.  For now we're only using one CPU
    model (SimpleCPU) so there isn't even a pressing need to upgrade yet.

--HG--
extra : convert_revision : d8319c4cd5c937c2c033270cef850d19b805d256
2006-03-28 22:55:08 -05:00

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# -*- mode:python -*-
# Copyright (c) 2004-2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
###################################################
#
# SCons top-level build description (SConstruct) file.
#
# To build M5, you need a directory with three things:
# 1. A copy of this file (named SConstruct).
# 2. A link named 'm5' to the top of the M5 simulator source tree.
# 3. A link named 'ext' to the top of the M5 external source tree.
#
# Then type 'scons' to build the default configuration (see below), or
# 'scons <CONFIG>/<binary>' to build some other configuration (e.g.,
# 'ALPHA_FS/m5.opt' for the optimized full-system version).
#
###################################################
# Python library imports
import sys
import os
# Check for recent-enough Python and SCons versions
EnsurePythonVersion(2,3)
EnsureSConsVersion(0,96)
# The absolute path to the current directory (where this file lives).
ROOT = Dir('.').abspath
# Paths to the M5 and external source trees (local symlinks).
SRCDIR = os.path.join(ROOT, 'm5')
EXT_SRCDIR = os.path.join(ROOT, 'ext')
# Check for 'm5' and 'ext' links, die if they don't exist.
if not os.path.isdir(SRCDIR):
print "Error: '%s' must be a link to the M5 source tree." % SRCDIR
Exit(1)
if not os.path.isdir('ext'):
print "Error: '%s' must be a link to the M5 external source tree." \
% EXT_SRCDIR
Exit(1)
# tell python where to find m5 python code
sys.path.append(os.path.join(SRCDIR, 'python'))
###################################################
#
# Figure out which configurations to set up.
#
#
# It's prohibitive to do all the combinations of base configurations
# and options, so we have to infer which ones the user wants.
#
# 1. If there are command-line targets, the configuration(s) are inferred
# from the directories of those targets. If scons was invoked from a
# subdirectory (using 'scons -u'), those targets have to be
# interpreted relative to that subdirectory.
#
# 2. If there are no command-line targets, and scons was invoked from a
# subdirectory (using 'scons -u'), the configuration is inferred from
# the name of the subdirectory.
#
# 3. If there are no command-line targets and scons was invoked from
# the root build directory, a default configuration is used. The
# built-in default is ALPHA_SE, but this can be overridden by setting the
# M5_DEFAULT_CONFIG shell environment veriable.
#
# In cases 2 & 3, the specific file target defaults to 'm5.debug', but
# this can be overridden by setting the M5_DEFAULT_BINARY shell
# environment veriable.
#
###################################################
# Find default configuration & binary.
default_config = os.environ.get('M5_DEFAULT_CONFIG', 'ALPHA_SE')
default_binary = os.environ.get('M5_DEFAULT_BINARY', 'm5.debug')
# Ask SCons which directory it was invoked from. If you invoke SCons
# from a subdirectory you must use the '-u' flag.
launch_dir = GetLaunchDir()
# Build a list 'my_targets' of all the targets relative to ROOT.
if launch_dir == ROOT:
# invoked from root build dir
if len(COMMAND_LINE_TARGETS) != 0:
# easy: use specified targets as is
my_targets = COMMAND_LINE_TARGETS
else:
# default target (ALPHA_SE/m5.debug, unless overridden)
target = os.path.join(default_config, default_binary)
my_targets = [target]
Default(target)
else:
# invoked from subdirectory
if not launch_dir.startswith(ROOT):
print "Error: launch dir (%s) not a subdirectory of ROOT (%s)!" \
(launch_dir, ROOT)
Exit(1)
# make launch_dir relative to ROOT (strip ROOT plus slash off front)
launch_dir = launch_dir[len(ROOT)+1:]
if len(COMMAND_LINE_TARGETS) != 0:
# make specified targets relative to ROOT
my_targets = map(lambda x: os.path.join(launch_dir, x),
COMMAND_LINE_TARGETS)
else:
# build default binary (m5.debug, unless overridden) using the
# config inferred by the invocation directory (the first
# subdirectory after ROOT)
target = os.path.join(launch_dir.split('/')[0], default_binary)
my_targets = [target]
Default(target)
# Normalize target paths (gets rid of '..' in the middle, etc.)
my_targets = map(os.path.normpath, my_targets)
# Generate a list of the unique configs that the collected targets reference.
build_dirs = []
for t in my_targets:
dir = t.split('/')[0]
if dir not in build_dirs:
build_dirs.append(dir)
###################################################
#
# Set up the default build environment. This environment is copied
# and modified according to each selected configuration.
#
###################################################
env = Environment(ENV = os.environ, # inherit user's environment vars
ROOT = ROOT,
SRCDIR = SRCDIR,
EXT_SRCDIR = EXT_SRCDIR)
env.SConsignFile("sconsign")
# I waffle on this setting... it does avoid a few painful but
# unnecessary builds, but it also seems to make trivial builds take
# noticeably longer.
if False:
env.TargetSignatures('content')
# M5_EXT is used by isa_parser.py to find the PLY package.
env.Append(ENV = { 'M5_EXT' : EXT_SRCDIR })
# Set up default C++ compiler flags
env.Append(CCFLAGS='-pipe')
env.Append(CCFLAGS='-fno-strict-aliasing')
env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
if sys.platform == 'cygwin':
# cygwin has some header file issues...
env.Append(CCFLAGS=Split("-Wno-uninitialized"))
env.Append(CPPPATH=[os.path.join(EXT_SRCDIR + '/dnet')])
# Default libraries
env.Append(LIBS=['z'])
# Platform-specific configuration
conf = Configure(env)
# Check for <fenv.h> (C99 FP environment control)
have_fenv = conf.CheckHeader('fenv.h', '<>')
if not have_fenv:
print "Warning: Header file <fenv.h> not found."
print " This host has no IEEE FP rounding mode control."
# Check for mysql.
mysql_config = WhereIs('mysql_config')
have_mysql = mysql_config != None
# Check MySQL version.
if have_mysql:
mysql_version = os.popen(mysql_config + ' --version').read()
mysql_version = mysql_version.split('.')
mysql_major = int(mysql_version[0])
mysql_minor = int(mysql_version[1])
# This version check is probably overly conservative, but it deals
# with the versions we have installed.
if mysql_major < 4 or (mysql_major == 4 and mysql_minor < 1):
print "Warning: MySQL v4.1 or newer required."
have_mysql = False
# Set up mysql_config commands.
if have_mysql:
mysql_config_include = mysql_config + ' --include'
if os.system(mysql_config_include + ' > /dev/null') != 0:
# older mysql_config versions don't support --include, use
# --cflags instead
mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
# This seems to work in all versions
mysql_config_libs = mysql_config + ' --libs'
env = conf.Finish()
# Define the universe of supported ISAs
env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']
# Define the universe of supported CPU models
env['ALL_CPU_LIST'] = ['SimpleCPU', 'FastCPU', 'FullCPU', 'AlphaFullCPU']
# Sticky options get saved in the options file so they persist from
# one invocation to the next (unless overridden, in which case the new
# value becomes sticky).
sticky_opts = Options(args=ARGUMENTS)
sticky_opts.AddOptions(
EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']),
BoolOption('FULL_SYSTEM', 'Full-system support', False),
# There's a bug in scons 0.96.1 that causes ListOptions with list
# values (more than one value) not to be able to be restored from
# a saved option file. If this causes trouble then upgrade to
# scons 0.96.90 or later.
ListOption('CPU_MODELS', 'CPU models', 'all', env['ALL_CPU_LIST']),
BoolOption('ALPHA_TLASER',
'Model Alpha TurboLaser platform (vs. Tsunami)', False),
BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
False),
BoolOption('SS_COMPATIBLE_FP',
'Make floating-point results compatible with SimpleScalar',
False),
BoolOption('USE_SSE2',
'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
False),
BoolOption('STATS_BINNING', 'Bin statistics by CPU mode', have_mysql),
BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
('CC', 'C compiler', os.environ.get('CC', env['CC'])),
('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])),
BoolOption('BATCH', 'Use batch pool for build and tests', False),
('BATCH_CMD', 'Batch pool submission command name', 'qdo')
)
# Non-sticky options only apply to the current build.
nonsticky_opts = Options(args=ARGUMENTS)
nonsticky_opts.AddOptions(
BoolOption('update_ref', 'Update test reference outputs', False)
)
# These options get exported to #defines in config/*.hh (see m5/SConscript).
env.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \
'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \
'STATS_BINNING']
# Define a handy 'no-op' action
def no_action(target, source, env):
return 0
env.NoAction = Action(no_action, None)
# libelf build is described in its own SConscript file.
# SConscript-global is the build in build/libelf shared among all
# configs.
env.SConscript('m5/libelf/SConscript-global', exports = 'env')
###################################################
#
# Define a SCons builder for configuration flag headers.
#
###################################################
# This function generates a config header file that #defines the
# option symbol to the current option setting (0 or 1). The source
# operands are the name of the option and a Value node containing the
# value of the option.
def build_config_file(target, source, env):
(option, value) = [s.get_contents() for s in source]
f = file(str(target[0]), 'w')
print >> f, '#define', option, value
f.close()
return None
# Generate the message to be printed when building the config file.
def build_config_file_string(target, source, env):
(option, value) = [s.get_contents() for s in source]
return "Defining %s as %s in %s." % (option, value, target[0])
# Combine the two functions into a scons Action object.
config_action = Action(build_config_file, build_config_file_string)
# The emitter munges the source & target node lists to reflect what
# we're really doing.
def config_emitter(target, source, env):
# extract option name from Builder arg
option = str(target[0])
# True target is config header file
target = os.path.join('config', option.lower() + '.hh')
# Force value to 0/1 even if it's a Python bool
val = int(eval(str(env[option])))
# Sources are option name & value (packaged in SCons Value nodes)
return ([target], [Value(option), Value(val)])
config_builder = Builder(emitter = config_emitter, action = config_action)
env.Append(BUILDERS = { 'ConfigFile' : config_builder })
###################################################
#
# Define build environments for selected configurations.
#
###################################################
# rename base env
base_env = env
for build_dir in build_dirs:
# Make a copy of the default environment to use for this config.
env = base_env.Copy()
# Record what build_dir was in the environment
env.Append(BUILD_DIR=build_dir);
# Set env according to the build directory config.
sticky_opts.files = []
# Name of default options file is taken from 'default=' on command
# line if set, otherwise name of build dir.
default_options_file = os.path.join('default_options',
ARGUMENTS.get('default', build_dir))
if os.path.isfile(default_options_file):
sticky_opts.files.append(default_options_file)
current_options_file = os.path.join('options', build_dir)
if os.path.isfile(current_options_file):
sticky_opts.files.append(current_options_file)
else:
# if file doesn't exist, make sure at least the directory is there
# so we can create it later
opt_dir = os.path.dirname(current_options_file)
if not os.path.isdir(opt_dir):
os.mkdir(opt_dir)
if not sticky_opts.files:
print "%s: No options file found in options, using defaults." \
% build_dir
# Apply current option settings to env
sticky_opts.Update(env)
nonsticky_opts.Update(env)
# Process option settings.
if not have_fenv and env['USE_FENV']:
print "Warning: <fenv.h> not available; " \
"forcing USE_FENV to False in", build_dir + "."
env['USE_FENV'] = False
if not env['USE_FENV']:
print "Warning: No IEEE FP rounding mode control in", build_dir + "."
print " FP results may deviate slightly from other platforms."
if env['EFENCE']:
env.Append(LIBS=['efence'])
if env['USE_MYSQL']:
if not have_mysql:
print "Warning: MySQL not available; " \
"forcing USE_MYSQL to False in", build_dir + "."
env['USE_MYSQL'] = False
else:
print "Compiling in", build_dir, "with MySQL support."
env.ParseConfig(mysql_config_libs)
env.ParseConfig(mysql_config_include)
# Save sticky option settings back to current options file
sticky_opts.Save(current_options_file, env)
# Do this after we save setting back, or else we'll tack on an
# extra 'qdo' every time we run scons.
if env['BATCH']:
env['CC'] = env['BATCH_CMD'] + ' ' + env['CC']
env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX']
if env['USE_SSE2']:
env.Append(CCFLAGS='-msse2')
# The m5/SConscript file sets up the build rules in 'env' according
# to the configured options. It returns a list of environments,
# one for each variant build (debug, opt, etc.)
envList = SConscript('m5/SConscript', build_dir = build_dir,
exports = 'env', duplicate = False)
# Set up the regression tests for each build.
for e in envList:
SConscript('m5-test/SConscript',
build_dir = os.path.join(build_dir, 'test', e.Label),
exports = { 'env' : e }, duplicate = False)
###################################################
#
# Let SCons do its thing. At this point SCons will use the defined
# build environments to build the requested targets.
#
###################################################
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