buildtools/wafadmin/Tools/flex.py

   1 #!/usr/bin/env python
   2 # encoding: utf-8
   3 # John O'Meara, 2006
   4 # Thomas Nagy, 2006-2008
   5
   6 "Flex processing"
   7
   8 import TaskGen
   9
  10 def decide_ext(self, node):
  11         if 'cxx' in self.features: return '.lex.cc'
  12         else: return '.lex.c'
  13
  14 TaskGen.declare_chain(
  15         name = 'flex',
  16         rule = '${FLEX} -o${TGT} ${FLEXFLAGS} ${SRC}',
  17         ext_in = '.l',
  18         ext_out = '.c .cxx',
  19         decider = decide_ext
  20 )
  21
  22 def detect(conf):
  23         conf.find_program('flex', var='FLEX', mandatory=True)
  24         conf.env['FLEXFLAGS'] = ''
  25