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#!/usr/bin/python2.4
# Copyright 2008, Google Inc.
# 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 Google Inc. 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.
"""Distcc support for SCons.
Since this modifies the C compiler strings, it must be specified after the
compiler tool in the tool list.
Distcc support can be enabled by specifying --distcc on the SCons command
line.
"""
import optparse
import os
import sys
from SCons.compat._scons_optparse import OptionConflictError
import SCons.Script
def generate(env):
# NOTE: SCons requires the use of this name, which fails gpylint.
"""SCons entry point for this tool."""
if not env.Detect('distcc'):
return
try:
SCons.Script.AddOption(
'--distcc',
dest='distcc',
action='store_true',
help='enable distcc support')
SCons.Script.Help(' --distcc Enable distcc suport.\n')
except (OptionConflictError, optparse.OptionConflictError):
# The distcc tool can be specified for multiple platforms, but the
# --distcc option can only be added once. Ignore the error which
# results from trying to add it a second time.
pass
# If distcc isn't enabled, stop now
if not env.GetOption('distcc'):
return
# Copy DISTCC_HOSTS and HOME environment variables from system environment
for envvar in ('DISTCC_HOSTS', 'HOME'):
value = env.get(envvar, os.environ.get(envvar))
if not value:
print 'Warning: %s not set in environment; disabling distcc.' % envvar
return
env['ENV'][envvar] = value
# Set name of distcc tool
env['DISTCC'] = 'distcc'
# Modify compilers we support
distcc_compilers = env.get('DISTCC_COMPILERS', ['cc', 'gcc', 'c++', 'g++'])
for compiler_var in ('CC', 'CXX'):
compiler = env.get(compiler_var)
if compiler in distcc_compilers:
if sys.platform == 'darwin':
# On Mac, distcc requires the full path to the compiler
compiler = env.WhereIs(compiler)
env[compiler_var] = '$DISTCC ' + compiler
def exists(env):
"""Returns true if tool exists."""
# NOTE: SCons requires the use of this name, which fails gpylint.
return env.Detect('distcc')
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