74 lines
2.8 KiB
Python
74 lines
2.8 KiB
Python
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"""SCons.Tool.yacc
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Tool-specific initialization for yacc.
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There normally shouldn't be any need to import this module directly.
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It will usually be imported through the generic SCons.Tool.Tool()
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selection method.
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "/home/scons/scons/branch.0/baseline/src/engine/SCons/Tool/yacc.py 0.96.1.D001 2004/08/23 09:55:29 knight"
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import os.path
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import SCons.Defaults
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import SCons.Tool
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import SCons.Util
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def _yaccEmitter(target, source, env, ysuf, hsuf):
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# If -d is specified on the command line, yacc will emit a .h
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# or .hpp file as well as a .c or .cpp file, depending on whether
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# the input file is a .y or .yy, respectively.
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if len(source) and '-d' in SCons.Util.CLVar(env.subst("$YACCFLAGS")):
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base, ext = os.path.splitext(SCons.Util.to_String(source[0]))
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if ext == ysuf:
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base, ext = os.path.splitext(SCons.Util.to_String(target[0]))
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target.append(base + hsuf)
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return (target, source)
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def yEmitter(target, source, env):
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return _yaccEmitter(target, source, env, '.y', '.h')
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def yyEmitter(target, source, env):
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return _yaccEmitter(target, source, env, '.yy', '.hpp')
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def generate(env):
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"""Add Builders and construction variables for yacc to an Environment."""
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c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
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c_file.add_action('.y', SCons.Defaults.YaccAction)
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cxx_file.add_action('.yy', SCons.Defaults.YaccAction)
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c_file.add_emitter('.y', yEmitter)
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cxx_file.add_emitter('.yy', yyEmitter)
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env['YACC'] = env.Detect('bison') or 'yacc'
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env['YACCFLAGS'] = SCons.Util.CLVar('')
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env['YACCCOM'] = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
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def exists(env):
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return env.Detect(['bison', 'yacc'])
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