diff --git a/waflib/Context.py b/waflib/Context.py
index 7c2b7b3c..dcd6cae9 100644
--- a/waflib/Context.py
+++ b/waflib/Context.py
@@ -81,7 +81,6 @@ def create_context(cmd_name, *k, **kw):
 	:return: Context object
 	:rtype: :py:class:`waflib.Context.Context`
 	"""
-	global classes
 	for x in classes:
 		if x.cmd == cmd_name:
 			return x(*k, **kw)
@@ -110,7 +109,6 @@ class store_context(type):
 		if not getattr(cls, 'fun', None):
 			cls.fun = cls.cmd
 
-		global classes
 		classes.insert(0, cls)
 
 ctx = store_context('ctx', (object,), {})
@@ -150,7 +148,6 @@ class Context(ctx):
 		try:
 			rd = kw['run_dir']
 		except KeyError:
-			global run_dir
 			rd = run_dir
 
 		# binds the context to the nodes in use to avoid a context singleton
@@ -201,7 +198,6 @@ class Context(ctx):
 		Here, it calls the function name in the top-level wscript file. Most subclasses
 		redefine this method to provide additional functionality.
 		"""
-		global g_module
 		self.recurse([os.path.dirname(g_module.root_path)])
 
 	def pre_recurse(self, node):
@@ -624,7 +620,6 @@ class Context(ctx):
 		:param ban: list of exact file names to exclude
 		:type ban: list of string
 		"""
-		global waf_dir
 		if os.path.isdir(waf_dir):
 			lst = self.root.find_node(waf_dir).find_node('waflib/extras').ant_glob(var)
 			for x in lst:
diff --git a/waflib/Logs.py b/waflib/Logs.py
index 3e0b06d7..c524c46f 100644
--- a/waflib/Logs.py
+++ b/waflib/Logs.py
@@ -139,7 +139,6 @@ class log_filter(logging.Filter):
 
 		:param rec: log entry
 		"""
-		global verbose
 		rec.zone = rec.module
 		if rec.levelno >= logging.INFO:
 			return True
@@ -253,18 +252,15 @@ def debug(*k, **kw):
 	"""
 	Wraps logging.debug and discards messages if the verbosity level :py:attr:`waflib.Logs.verbose` ≤ 0
 	"""
-	global verbose
 	if verbose:
 		k = list(k)
 		k[0] = k[0].replace('\n', ' ')
-		global log
 		log.debug(*k, **kw)
 
 def error(*k, **kw):
 	"""
 	Wrap logging.errors, adds the stack trace when the verbosity level :py:attr:`waflib.Logs.verbose` ≥ 2
 	"""
-	global log, verbose
 	log.error(*k, **kw)
 	if verbose > 2:
 		st = traceback.extract_stack()
@@ -282,14 +278,12 @@ def warn(*k, **kw):
 	"""
 	Wraps logging.warn
 	"""
-	global log
 	log.warn(*k, **kw)
 
 def info(*k, **kw):
 	"""
 	Wraps logging.info
 	"""
-	global log
 	log.info(*k, **kw)
 
 def init_log():
@@ -381,6 +375,5 @@ def pprint(col, msg, label='', sep='\n'):
 	:param sep: a string to append at the end (line separator)
 	:type sep: string
 	"""
-	global info
 	info('%s%s%s %s', colors(col), msg, colors.NORMAL, label, extra={'terminator':sep})
 
diff --git a/waflib/Task.py b/waflib/Task.py
index d9dbd6e8..37c9baeb 100644
--- a/waflib/Task.py
+++ b/waflib/Task.py
@@ -93,7 +93,6 @@ class store_task_type(type):
 		name = cls.__name__
 
 		if name != 'evil' and name != 'Task':
-			global classes
 			if getattr(cls, 'run_str', None):
 				# if a string is provided, convert it to a method
 				(f, dvars) = compile_fun(cls.run_str, cls.shell)
@@ -1219,7 +1218,6 @@ def task_factory(name, func=None, vars=None, color='GREEN', ext_in=[], ext_out=[
 		params['run'] = func
 
 	cls = type(Task)(name, (Task,), params)
-	global classes
 	classes[name] = cls
 
 	if ext_in:
diff --git a/waflib/TaskGen.py b/waflib/TaskGen.py
index ac2ed85f..2e67784b 100644
--- a/waflib/TaskGen.py
+++ b/waflib/TaskGen.py
@@ -753,7 +753,6 @@ class subst_pc(Task.Task):
 				lst.append(g(1))
 				return "%%(%s)s" % g(1)
 			return ''
-		global re_m4
 		code = getattr(self.generator, 're_m4', re_m4).sub(repl, code)
 
 		try:
diff --git a/waflib/Tools/c_preproc.py b/waflib/Tools/c_preproc.py
index 63cff65b..a07f1195 100644
--- a/waflib/Tools/c_preproc.py
+++ b/waflib/Tools/c_preproc.py
@@ -845,7 +845,6 @@ class c_parser(object):
 		try:
 			cache = node.ctx.preproc_cache_node
 		except AttributeError:
-			global FILE_CACHE_SIZE
 			cache = node.ctx.preproc_cache_node = Utils.lru_cache(FILE_CACHE_SIZE)
 
 		key = (node, filename)
@@ -924,7 +923,6 @@ class c_parser(object):
 		try:
 			cache = node.ctx.preproc_cache_lines
 		except AttributeError:
-			global LINE_CACHE_SIZE
 			cache = node.ctx.preproc_cache_lines = Utils.lru_cache(LINE_CACHE_SIZE)
 		try:
 			return cache[node]
@@ -1072,9 +1070,6 @@ def scan(task):
 
 	This function is bound as a task method on :py:class:`waflib.Tools.c.c` and :py:class:`waflib.Tools.cxx.cxx` for example
 	"""
-
-	global go_absolute
-
 	try:
 		incn = task.generator.includes_nodes
 	except AttributeError:
diff --git a/waflib/Tools/javaw.py b/waflib/Tools/javaw.py
index b0e93187..a3529e63 100644
--- a/waflib/Tools/javaw.py
+++ b/waflib/Tools/javaw.py
@@ -240,7 +240,6 @@ class jar_create(JTask):
 			if not t.hasrun:
 				return Task.ASK_LATER
 		if not self.inputs:
-			global JAR_RE
 			try:
 				self.inputs = [x for x in self.basedir.ant_glob(JAR_RE, remove=False) if id(x) != id(self.outputs[0])]
 			except Exception:
@@ -273,7 +272,6 @@ class javac(JTask):
 				return Task.ASK_LATER
 
 		if not self.inputs:
-			global SOURCE_RE
 			self.inputs  = []
 			for x in self.srcdir:
 				self.inputs.extend(x.ant_glob(SOURCE_RE, remove=False))
diff --git a/waflib/Tools/md5_tstamp.py b/waflib/Tools/md5_tstamp.py
index 414a1222..6428e460 100644
--- a/waflib/Tools/md5_tstamp.py
+++ b/waflib/Tools/md5_tstamp.py
@@ -25,7 +25,6 @@ def h_file(self):
 	if filename in cache and cache[filename][0] == st.st_mtime:
 		return cache[filename][1]
 
-	global STRONGEST
 	if STRONGEST:
 		ret = Utils.h_file(filename)
 	else:
diff --git a/waflib/Tools/tex.py b/waflib/Tools/tex.py
index f2f53585..4710f001 100644
--- a/waflib/Tools/tex.py
+++ b/waflib/Tools/tex.py
@@ -167,7 +167,6 @@ class tex(Task.Task):
 				return
 			seen.append(node)
 			code = node.read()
-			global re_tex
 			for match in re_tex.finditer(code):
 
 				multibib = match.group('type')
diff --git a/waflib/Tools/waf_unit_test.py b/waflib/Tools/waf_unit_test.py
index a6f89527..5f18a474 100644
--- a/waflib/Tools/waf_unit_test.py
+++ b/waflib/Tools/waf_unit_test.py
@@ -162,7 +162,6 @@ class utest(Task.Task):
 	def exec_command(self, cmd, **kw):
 		Logs.debug('runner: %r', cmd)
 		if getattr(Options.options, 'dump_test_scripts', False):
-			global SCRIPT_TEMPLATE
 			script_code = SCRIPT_TEMPLATE % {
 				'python': sys.executable,
 				'env': self.get_test_env(),