283 lines
10 KiB
Text
283 lines
10 KiB
Text
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# -*- mode:python -*-
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# Copyright (c) 2004 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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###################################################
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#
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# SCons top-level build description (SConstruct) file.
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#
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# To build M5, you need a directory with three things:
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# 1. A copy of this file (named SConstruct).
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# 2. A link named 'm5' to the top of the M5 simulator source tree.
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# 3. A link named 'ext' to the top of the M5 external source tree.
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#
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# Then type 'scons' to build the default configuration (see below), or
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# 'scons <CONFIG>/<binary>' to build some other configuration (e.g.,
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# 'KERNEL/m5.opt' for the optimized full-system version).
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#
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###################################################
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# Python library imports
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import sys
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import os
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# The absolute path to the current directory (where this file lives).
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ROOT = Dir('.').abspath
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# Paths to the M5 and external source trees (local symlinks).
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SRCDIR = os.path.join(ROOT, 'm5')
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EXT_SRCDIR = os.path.join(ROOT, 'ext')
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# Check for 'm5' and 'ext' links, die if they don't exist.
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if not os.path.isdir(SRCDIR):
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print "Error: '%s' must be a link to the M5 source tree." % SRCDIR
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sys.exit(1)
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if not os.path.isdir('ext'):
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print "Error: '%s' must be a link to the M5 external source tree." \
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% EXT_SRCDIR
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sys.exit(1)
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###################################################
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#
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# Define Configurations
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#
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# The build system infers the build options from the subdirectory name
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# that the simulator is built under. The subdirectory name must be of
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# the form <CONFIG>[.<OPT>]*, where <CONFIG> is a base configuration
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# (e.g., ALPHA or KERNEL) and OPT is an option (e.g., MYSQL). The
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# following code defines the standard configurations and options.
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# Additional local configurations and options are read from the file
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# 'local_configs' if it exists.
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#
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# Each base configuration or option is defined in two steps: a
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# function that takes an SCons build environment and modifies it
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# appropriately for that config or option, and an entry in the
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# 'configs_map' or 'options_map' dictionary that maps the directory
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# name string to the function. (The directory names are all upper
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# case, by convention.)
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#
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###################################################
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# Base non-full-system Alpha ISA configuration.
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def AlphaConfig(env):
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env.Replace(TARGET_ISA = 'alpha')
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env.Append(CPPDEFINES = 'SS_COMPATIBLE_FP')
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# Base full-system configuration.
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def KernelConfig(env):
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env.Replace(TARGET_ISA = 'alpha')
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env.Replace(FULL_SYSTEM = True)
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env.Append(CPPDEFINES = ['FULL_SYSTEM', 'SYSTEM_EV5'])
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# Base configurations map.
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configs_map = {
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'ALPHA' : AlphaConfig,
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'KERNEL' : KernelConfig
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}
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# Enable detailed full-system binning.
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def MeasureOpt(env):
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env.Replace(USE_MYSQL = True)
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env.Append(CPPDEFINES = 'FS_MEASURE')
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# Enable MySql database output for stats.
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def MySqlOpt(env):
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env.Replace(USE_MYSQL = True)
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# Disable FastAlloc object allocation.
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def NoFastAllocOpt(env):
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env.Append(CPPDEFINES = 'NO_FAST_ALLOC')
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# Configuration options map.
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options_map = {
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'MEASURE' : MeasureOpt,
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'MYSQL' : MySqlOpt,
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'NO_FAST_ALLOC' : NoFastAllocOpt
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}
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# The 'local_configs' file can be used to define additional base
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# configurations and/or options without changing this file.
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if os.path.isfile('local_configs'):
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SConscript('local_configs', exports = ['configs_map', 'options_map'])
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# This function parses a directory name of the form <CONFIG>[.<OPT>]*
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# and sets up the build environment appropriately. Returns True if
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# successful, False if the base config or any of the options were not
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# defined.
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def set_dir_options(dir, env):
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parts = dir.split('.')
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config = parts[0]
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opts = parts[1:]
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try:
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configs_map[config](env)
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map(lambda opt: options_map[opt](env), opts)
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return True
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except KeyError, key:
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print "Config/option '%s' not found." % key
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return False
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# Set the default configuration and binary. The default target (if
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# scons is invoked at the top level with no command-line targets) is
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# 'ALPHA/m5.debug'. If scons is invoked in a subdirectory with no
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# command-line targets, the configuration
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###################################################
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#
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# Figure out which configurations to set up.
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#
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#
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# It's prohibitive to do all the combinations of base configurations
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# and options, so we have to infer which ones the user wants.
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#
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# 1. If there are command-line targets, the configuration(s) are inferred
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# from the directories of those targets. If scons was invoked from a
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# subdirectory (using 'scons -u'), those targets have to be
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# interpreted relative to that subdirectory.
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#
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# 2. If there are no command-line targets, and scons was invoked from a
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# subdirectory (using 'scons -u'), the configuration is inferred from
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# the name of the subdirectory.
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#
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# 3. If there are no command-line targets and scons was invoked from
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# the root build directory, a default configuration is used. The
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# built-in default is ALPHA, but this can be overridden by setting the
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# M5_DEFAULT_CONFIG shell environment veriable.
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#
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# In cases 2 & 3, the specific file target defaults to 'm5.debug', but
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# this can be overridden by setting the M5_DEFAULT_BINARY shell
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# environment veriable.
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#
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###################################################
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# Find default configuration & binary.
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default_config = os.environ.get('M5_DEFAULT_CONFIG', 'ALPHA')
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default_binary = os.environ.get('M5_DEFAULT_BINARY', 'm5.debug')
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# Ask SCons which directory it was invoked from. If you invoke SCons
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# from a subdirectory you must use the '-u' flag.
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launch_dir = GetLaunchDir()
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# Build a list 'my_targets' of all the targets relative to ROOT.
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if launch_dir == ROOT:
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# invoked from root build dir
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if len(COMMAND_LINE_TARGETS) != 0:
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# easy: use specified targets as is
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my_targets = COMMAND_LINE_TARGETS
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else:
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# default target (ALPHA/m5.debug, unless overridden)
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target = os.path.join(default_config, default_binary)
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my_targets = [target]
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Default(target)
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else:
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# invoked from subdirectory
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if not launch_dir.startswith(ROOT):
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print "Error: launch dir (%s) not a subdirectory of ROOT (%s)!" \
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(launch_dir, ROOT)
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sys.exit(1)
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# make launch_dir relative to ROOT (strip ROOT plus slash off front)
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launch_dir = launch_dir[len(ROOT)+1:]
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if len(COMMAND_LINE_TARGETS) != 0:
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# make specified targets relative to ROOT
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my_targets = map(lambda x: os.path.join(launch_dir, x),
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COMMAND_LINE_TARGETS)
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else:
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# build default binary (m5.debug, unless overridden) using the
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# config inferred by the invocation directory (the first
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# subdirectory after ROOT)
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target = os.path.join(launch_dir.split('/')[0], default_binary)
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my_targets = [target]
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Default(target)
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# Normalize target paths (gets rid of '..' in the middle, etc.)
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my_targets = map(os.path.normpath, my_targets)
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# Generate a list of the unique configs that the collected targets reference.
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build_dirs = []
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for t in my_targets:
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dir = t.split('/')[0]
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if dir not in build_dirs:
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build_dirs.append(dir)
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###################################################
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#
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# Set up the default build environment. This environment is copied
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# and modified according to each selected configuration.
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#
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###################################################
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default_env = Environment(ENV = os.environ, # inherit user's enviroment vars
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ROOT = ROOT,
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SRCDIR = SRCDIR,
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EXT_SRCDIR = EXT_SRCDIR,
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CPPDEFINES = [],
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FULL_SYSTEM = False,
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USE_MYSQL = False)
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# M5_EXT is used by isa_parser.py to find the PLY package.
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default_env.Append(ENV = { 'M5_EXT' : EXT_SRCDIR })
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default_env.Append(CCFLAGS='-pipe')
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default_env.Append(CCFLAGS='-fno-strict-aliasing')
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default_env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
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# libelf build is described in its own SConscript file. Using a
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# dictionary for exports lets us export "default_env" so the
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# SConscript will see it as "env".
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default_env.SConscript('m5/libelf/SConscript', exports={'env' : default_env})
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###################################################
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#
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# Define build environments for selected configurations.
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#
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###################################################
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for build_dir in build_dirs:
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# Make a copy of the default environment to use for this config.
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env = default_env.Copy()
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# Modify 'env' according to the build directory config.
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print "Configuring options for directory '%s'." % build_dir
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if not set_dir_options(build_dir, env):
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print "Skipping directory '%s'." % build_dir
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continue
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# The m5/SConscript file sets up the build rules in 'env' according
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# to the configured options.
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SConscript('m5/SConscript', build_dir = build_dir, exports = 'env',
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duplicate=0)
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###################################################
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#
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# Let SCons do its thing. At this point SCons will use the defined
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# build enviornments to build the requested targets.
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#
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###################################################
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