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# $Id$
#
# SCons builder for gcc's precompiled headers
# Copyright (C) 2006 Tim Blechmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# $Revision$
# $LastChangedRevision$
# $LastChangedDate$
# $LastChangedBy$
import SCons.Action
import SCons.Builder
import SCons.Scanner.C
import SCons.Util
import SCons.Script
SCons.Script.EnsureSConsVersion(0,96,92)
GchAction = SCons.Action.Action('$GCHCOM', '$GCHCOMSTR')
GchShAction = SCons.Action.Action('$GCHSHCOM', '$GCHSHCOMSTR')
def gen_suffix(env, sources):
return sources[0].get_suffix() + env['GCHSUFFIX']
def header_path(node):
path = node.path
return path[:-4] # strip final '.gch'
GchShBuilder = SCons.Builder.Builder(action = GchShAction,
source_scanner = SCons.Scanner.C.CScanner(),
suffix = gen_suffix)
GchBuilder = SCons.Builder.Builder(action = GchAction,
source_scanner = SCons.Scanner.C.CScanner(),
suffix = gen_suffix)
def static_pch_emitter(target,source,env):
SCons.Defaults.StaticObjectEmitter( target, source, env )
scanner = SCons.Scanner.C.CScanner()
path = scanner.path(env)
deps = scanner(source[0], env, path)
if env.has_key('Gch') and env['Gch']:
if header_path(env['Gch']) in [x.path for x in deps]:
env.Depends(target, env['Gch'])
return (target, source)
def shared_pch_emitter(target,source,env):
SCons.Defaults.SharedObjectEmitter( target, source, env )
scanner = SCons.Scanner.C.CScanner()
path = scanner.path(env)
deps = scanner(source[0], env, path)
if env.has_key('GchSh') and env['GchSh']:
if header_path(env['GchSh']) in [x.path for x in deps]:
env.Depends(target, env['GchSh'])
return (target, source)
def generate(env):
"""
Add builders and construction variables for the Gch builder.
"""
env.Append(BUILDERS = {
'gch': env.Builder(
action = GchAction,
target_factory = env.fs.File,
),
'gchsh': env.Builder(
action = GchShAction,
target_factory = env.fs.File,
),
})
try:
bld = env['BUILDERS']['Gch']
bldsh = env['BUILDERS']['GchSh']
except KeyError:
bld = GchBuilder
bldsh = GchShBuilder
env['BUILDERS']['Gch'] = bld
env['BUILDERS']['GchSh'] = bldsh
env['GCHCOM'] = '$CXX -o $TARGET -x c++-header -c $CXXFLAGS $_CCCOMCOM $SOURCE'
env['GCHSHCOM'] = '$CXX -o $TARGET -x c++-header -c $SHCXXFLAGS $_CCCOMCOM $SOURCE'
env['GCHSUFFIX'] = '.gch'
for suffix in SCons.Util.Split('.c .C .cc .cxx .cpp .c++'):
env['BUILDERS']['StaticObject'].add_emitter( suffix, static_pch_emitter )
env['BUILDERS']['SharedObject'].add_emitter( suffix, shared_pch_emitter )
def exists(env):
return env.Detect('g++')
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