3 Tool-specific initialization for yacc.
5 There normally shouldn't be any need to import this module directly.
6 It will usually be imported through the generic SCons.Tool.Tool()
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19 # permit persons to whom the Software is furnished to do so, subject to
20 # the following conditions:
22 # The above copyright notice and this permission notice shall be included
23 # in all copies or substantial portions of the Software.
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34 __revision__ = "src/engine/SCons/Tool/yacc.py 5023 2010/06/14 22:05:46 scons"
42 YaccAction = SCons.Action.Action("$YACCCOM", "$YACCCOMSTR")
44 def _yaccEmitter(target, source, env, ysuf, hsuf):
45 yaccflags = env.subst("$YACCFLAGS", target=target, source=source)
46 flags = SCons.Util.CLVar(yaccflags)
47 targetBase, targetExt = os.path.splitext(SCons.Util.to_String(target[0]))
49 if '.ym' in ysuf: # If using Objective-C
50 target = [targetBase + ".m"] # the extension is ".m".
53 # If -d is specified on the command line, yacc will emit a .h
54 # or .hpp file with the same name as the .c or .cpp output file.
56 target.append(targetBase + env.subst(hsuf, target=target, source=source))
58 # If -g is specified on the command line, yacc will emit a .vcg
59 # file with the same base name as the .y, .yacc, .ym or .yy file.
61 base, ext = os.path.splitext(SCons.Util.to_String(source[0]))
62 target.append(base + env.subst("$YACCVCGFILESUFFIX"))
64 # With --defines and --graph, the name of the file is totally defined
66 fileGenOptions = ["--defines=", "--graph="]
68 for fileGenOption in fileGenOptions:
69 l = len(fileGenOption)
70 if option[:l] == fileGenOption:
71 # A file generating option is present, so add the file
72 # name to the list of targets.
73 fileName = option[l:].strip()
74 target.append(fileName)
76 return (target, source)
78 def yEmitter(target, source, env):
79 return _yaccEmitter(target, source, env, ['.y', '.yacc'], '$YACCHFILESUFFIX')
81 def ymEmitter(target, source, env):
82 return _yaccEmitter(target, source, env, ['.ym'], '$YACCHFILESUFFIX')
84 def yyEmitter(target, source, env):
85 return _yaccEmitter(target, source, env, ['.yy'], '$YACCHXXFILESUFFIX')
88 """Add Builders and construction variables for yacc to an Environment."""
89 c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
92 c_file.add_action('.y', YaccAction)
93 c_file.add_emitter('.y', yEmitter)
95 c_file.add_action('.yacc', YaccAction)
96 c_file.add_emitter('.yacc', yEmitter)
99 c_file.add_action('.ym', YaccAction)
100 c_file.add_emitter('.ym', ymEmitter)
103 cxx_file.add_action('.yy', YaccAction)
104 cxx_file.add_emitter('.yy', yyEmitter)
106 env['YACC'] = env.Detect('bison') or 'yacc'
107 env['YACCFLAGS'] = SCons.Util.CLVar('')
108 env['YACCCOM'] = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
109 env['YACCHFILESUFFIX'] = '.h'
111 # Apparently, OS X now creates file.hpp like everybody else
112 # I have no idea when it changed; it was fixed in 10.4
113 #if env['PLATFORM'] == 'darwin':
114 # # Bison on Mac OS X just appends ".h" to the generated target .cc
115 # # or .cpp file name. Hooray for delayed expansion of variables.
116 # env['YACCHXXFILESUFFIX'] = '${TARGET.suffix}.h'
118 # env['YACCHXXFILESUFFIX'] = '.hpp'
119 env['YACCHXXFILESUFFIX'] = '.hpp'
121 env['YACCVCGFILESUFFIX'] = '.vcg'
124 return env.Detect(['bison', 'yacc'])
128 # indent-tabs-mode:nil
130 # vim: set expandtab tabstop=4 shiftwidth=4: