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#!/usr/bin/env python
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# encoding: utf-8
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# John O'Meara, 2006
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# Thomas Nagy 2009
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"Bison processing"
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import Task
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from TaskGen import extension
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bison = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}'
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cls = Task.simple_task_type('bison', bison, 'GREEN', ext_in='.yc .y .yy', ext_out='.c .cxx .h .l', shell=False)
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@extension(['.y', '.yc', '.yy'])
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def big_bison(self, node):
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"""when it becomes complicated (unlike flex), the old recipes work better (cwd)"""
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has_h = '-d' in self.env['BISONFLAGS']
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outs = []
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if node.name.endswith('.yc'):
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outs.append(node.change_ext('.tab.cc'))
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if has_h:
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outs.append(node.change_ext('.tab.hh'))
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else:
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outs.append(node.change_ext('.tab.c'))
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if has_h:
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outs.append(node.change_ext('.tab.h'))
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tsk = self.create_task('bison', node, outs)
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tsk.cwd = node.bld_dir(tsk.env)
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# and the c/cxx file must be compiled too
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self.allnodes.append(outs[0])
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def detect(conf):
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bison = conf.find_program('bison', var='BISON', mandatory=True)
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conf.env['BISONFLAGS'] = '-d'
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