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