buildtools/wafadmin/Tools/bison.py

   1 #!/usr/bin/env python
   2 # encoding: utf-8
   3 # John O'Meara, 2006
   4 # Thomas Nagy 2009
   5
   6 "Bison processing"
   7
   8 import Task
   9 from TaskGen import extension
  10
  11 bison = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}'
  12 cls = Task.simple_task_type('bison', bison, 'GREEN', ext_in='.yc .y .yy', ext_out='.c .cxx .h .l', shell=False)
  13
  14 @extension(['.y', '.yc', '.yy'])
  15 def big_bison(self, node):
  16         """when it becomes complicated (unlike flex), the old recipes work better (cwd)"""
  17         has_h = '-d' in self.env['BISONFLAGS']
  18
  19         outs = []
  20         if node.name.endswith('.yc'):
  21                 outs.append(node.change_ext('.tab.cc'))
  22                 if has_h:
  23                         outs.append(node.change_ext('.tab.hh'))
  24         else:
  25                 outs.append(node.change_ext('.tab.c'))
  26                 if has_h:
  27                         outs.append(node.change_ext('.tab.h'))
  28
  29         tsk = self.create_task('bison', node, outs)
  30         tsk.cwd = node.bld_dir(tsk.env)
  31
  32         # and the c/cxx file must be compiled too
  33         self.allnodes.append(outs[0])
  34
  35 def detect(conf):
  36         bison = conf.find_program('bison', var='BISON', mandatory=True)
  37         conf.env['BISONFLAGS'] = '-d'
  38