1 files changed, 38 insertions, 0 deletions
diff --git a/buildtools/wafadmin/Tools/bison.py b/buildtools/wafadmin/Tools/bison.py
new file mode 100644
index 0000000000..49c6051873
--- /dev/null
+++ b/buildtools/wafadmin/Tools/bison.py
@@ -0,0 +1,38 @@
+#!/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'
+