summaryrefslogtreecommitdiff
path: root/build/SConstruct
blob: c11bcf71ccea2e8e1700c59a84f8d4e641243a31 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
# -*- mode:python -*-

# Copyright (c) 2004 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

# 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
    sys.exit(1)

if not os.path.isdir('ext'):
    print "Error: '%s' must be a link to the M5 external source tree." \
          % EXT_SRCDIR
    sys.exit(1)

# tell python where to find m5 python code
sys.path.append(os.path.join(SRCDIR, 'python'))


###################################################
#
# Define Configurations
#
# The build system infers the build options from the subdirectory name
# that the simulator is built under.  The subdirectory name must be of
# the form <CONFIG>[.<OPT>]*, where <CONFIG> is a base configuration
# (e.g., ALPHA_SE or ALPHA_FS) and OPT is an option (e.g., MYSQL).  The
# following code defines the standard configurations and options.
# Additional local configurations and options are read from the file
# 'local_configs' if it exists.
#
# Each base configuration or option is defined in two steps: a
# function that takes an SCons build environment and modifies it
# appropriately for that config or option, and an entry in the
# 'configs_map' or 'options_map' dictionary that maps the directory
# name string to the function.  (The directory names are all upper
# case, by convention.)
#
###################################################

# Base non-full-system Alpha ISA configuration.
def AlphaSyscallEmulConfig(env):
    env.Replace(TARGET_ISA = 'alpha')
    env.Append(CPPDEFINES = 'SS_COMPATIBLE_FP')

# Base full-system configuration.
def AlphaFullSysConfig(env):
    env.Replace(TARGET_ISA = 'alpha')
    env.Replace(FULL_SYSTEM = True)
    env.Append(CPPDEFINES = ['FULL_SYSTEM'])

# Base configurations map.
configs_map = {
    'ALPHA_SE' : AlphaSyscallEmulConfig,
    'ALPHA_FS' : AlphaFullSysConfig
    }

# Disable FastAlloc object allocation.
def NoFastAllocOpt(env):
    env.Append(CPPDEFINES = 'NO_FAST_ALLOC')

# Enable efence
def EfenceOpt(env):
    env.Append(LIBS=['efence'])

# Configuration options map.
options_map = {
    'NO_FAST_ALLOC' : NoFastAllocOpt,
    'EFENCE' : EfenceOpt
    }

# The 'local_configs' file can be used to define additional base
# configurations and/or options without changing this file.
if os.path.isfile('local_configs'):
    SConscript('local_configs', exports = ['configs_map', 'options_map'])

# This function parses a directory name of the form <CONFIG>[.<OPT>]*
# and sets up the build environment appropriately.  Returns True if
# successful, False if the base config or any of the options were not
# defined.
def set_dir_options(dir, env):
    parts = dir.split('.')
    config = parts[0]
    opts = parts[1:]
    try:
        configs_map[config](env)
        map(lambda opt: options_map[opt](env), opts)
        return True
    except KeyError, key:
        print "Config/option '%s' not found." % key
        return False

# Set the default configuration and binary.  The default target (if
# scons is invoked at the top level with no command-line targets) is
# 'ALPHA_SE/m5.debug'.  If scons is invoked in a subdirectory with no
# command-line targets, the configuration

###################################################
#
# 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)
        sys.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.
#
###################################################

default_env = Environment(ENV = os.environ,  # inherit user's enviroment vars
                          ROOT = ROOT,
                          SRCDIR = SRCDIR,
                          EXT_SRCDIR = EXT_SRCDIR,
                          CPPDEFINES = [],
                          FULL_SYSTEM = False,
                          USE_MYSQL = False)

default_env.SConsignFile("sconsign")

# For some reason, the CC and CXX variables don't get passed into the
# environment correctly.  This is probably some sort of scons bug that
# will eventually be fixed.
if os.environ.has_key('CC'):
    default_env.Replace(CC=os.environ['CC'])

if os.environ.has_key('CXX'):
    default_env.Replace(CXX=os.environ['CXX'])

# M5_EXT is used by isa_parser.py to find the PLY package.
default_env.Append(ENV = { 'M5_EXT' : EXT_SRCDIR })

default_env.Append(CCFLAGS='-pipe')
default_env.Append(CCFLAGS='-fno-strict-aliasing')
default_env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
default_env.Append(CPPPATH=[os.path.join(EXT_SRCDIR + '/dnet')])

# libelf build is described in its own SConscript file.  Using a
# dictionary for exports lets us export "default_env" so the
# SConscript will see it as "env".  SConscript-global is the build in
# build/libelf shared among all configs.
default_env.SConscript('m5/libelf/SConscript-global',
                       exports={'env' : default_env})

###################################################
#
# Define build environments for selected configurations.
#
###################################################

for build_dir in build_dirs:
    # Make a copy of the default environment to use for this config.
    env = default_env.Copy()
    # Modify 'env' according to the build directory config.
    print "Configuring options for directory '%s'." % build_dir
    if not set_dir_options(build_dir, env):
        print "Skipping directory '%s'." % build_dir
        continue

    # The m5/SConscript file sets up the build rules in 'env' according
    # to the configured options.
    SConscript('m5/SConscript', build_dir = build_dir, exports = 'env',
               duplicate=0)


###################################################
#
# Let SCons do its thing.  At this point SCons will use the defined
# build environments to build the requested targets.
#
###################################################