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50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
#!/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 2009-2017 (ita)
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"""
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The **bison** program is a code generator which creates C or C++ files.
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The generated files are compiled into object files.
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"""
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from waflib import Task
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from waflib.TaskGen import extension
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class bison(Task.Task):
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"""Compiles bison files"""
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color = 'BLUE'
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run_str = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}'
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ext_out = ['.h'] # just to make sure
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@extension('.y', '.yc', '.yy')
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def big_bison(self, node):
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"""
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Creates a bison task, which must be executed from the directory of the output file.
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"""
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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.parent.get_bld()
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# and the c/cxx file must be compiled too
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self.source.append(outs[0])
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def configure(conf):
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"""
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Detects the *bison* program
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"""
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conf.find_program('bison', var='BISON')
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conf.env.BISONFLAGS = ['-d']
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