Import of the watch repository from Pebble

third_party/waf/waf-light/waflib/Tools/bison.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# John O'Meara, 2006
+# Thomas Nagy 2009-2010 (ita)
+
+"""
+The **bison** program is a code generator which creates C or C++ files.
+The generated files are compiled into object files.
+"""
+
+from waflib import Task
+from waflib.TaskGen import extension
+
+class bison(Task.Task):
+	"""Compile bison files"""
+	color   = 'BLUE'
+	run_str = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}'
+	ext_out = ['.h'] # just to make sure
+
+@extension('.y', '.yc', '.yy')
+def big_bison(self, node):
+	"""
+	Create a bison task, which must be executed from the directory of the output file.
+	"""
+	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.parent.get_bld().abspath()
+
+	# and the c/cxx file must be compiled too
+	self.source.append(outs[0])
+
+def configure(conf):
+	"""
+	Detect the *bison* program
+	"""
+	conf.find_program('bison', var='BISON')
+	conf.env.BISONFLAGS = ['-d']
+