bison.py (1187B)
1 #!/usr/bin/env python 2 # encoding: utf-8 3 # John O'Meara, 2006 4 # Thomas Nagy 2009-2018 (ita) 5 6 """ 7 The **bison** program is a code generator which creates C or C++ files. 8 The generated files are compiled into object files. 9 """ 10 11 from waflib import Task 12 from waflib.TaskGen import extension 13 14 class bison(Task.Task): 15 """Compiles bison files""" 16 color = 'BLUE' 17 run_str = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}' 18 ext_out = ['.h'] # just to make sure 19 20 @extension('.y', '.yc', '.yy') 21 def big_bison(self, node): 22 """ 23 Creates a bison task, which must be executed from the directory of the output file. 24 """ 25 has_h = '-d' in self.env.BISONFLAGS 26 27 outs = [] 28 if node.name.endswith('.yc'): 29 outs.append(node.change_ext('.tab.cc')) 30 if has_h: 31 outs.append(node.change_ext('.tab.hh')) 32 else: 33 outs.append(node.change_ext('.tab.c')) 34 if has_h: 35 outs.append(node.change_ext('.tab.h')) 36 37 tsk = self.create_task('bison', node, outs) 38 tsk.cwd = node.parent.get_bld() 39 40 # and the c/cxx file must be compiled too 41 self.source.append(outs[0]) 42 43 def configure(conf): 44 """ 45 Detects the *bison* program 46 """ 47 conf.find_program('bison', var='BISON') 48 conf.env.BISONFLAGS = ['-d'] 49