Squashed 'waflib/' changes from 915dcb1..e7a29b6

e7a29b6 Upgrade to waf 2.0.15
8280f9d Add command for running executables from the build directory
8073c1a Make make_simple_dox() safe in case of exception
70d03b8 Avoid use of global counter hacks for configuration display
b7d689a Rewrite test framework
94deadf Automatically add options and move add_flags() to options context
f4259ee Reduce system include path noise
927b608 Automatically display configuration header
c44b8f3 Set line justification from a constant in the wscript
a48e26f Automatically detect if wscript has a test hook
ef66724 Save runtime variables in the environment
63bcbcd Clean up TestContext
b1d9505 Add ExecutionContext for setting runtime environment
387c1df Add show_diff() and test_file_equals() utilities
29d4d29 Fix in-tree library paths
9fde01f Add custom configuration context
6d3612f Add lib_path_name constant

git-subtree-dir: waflib
git-subtree-split: e7a29b6b9b2f842314244c23c14d8f8f560904e1

1 files changed, 49 insertions, 0 deletions

diff --git a/Tools/bison.py b/Tools/bison.py
new file mode 100644
index 0000000..eef56dc
--- /dev/null
+++ b/Tools/bison.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# John O'Meara, 2006
+# Thomas Nagy 2009-2018 (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):
+	"""Compiles 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):
+	"""
+	Creates 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()
+
+	# and the c/cxx file must be compiled too
+	self.source.append(outs[0])
+
+def configure(conf):
+	"""
+	Detects the *bison* program
+	"""
+	conf.find_program('bison', var='BISON')
+	conf.env.BISONFLAGS = ['-d']
+