diff --git a/TODO b/TODO
index 3600c3fd..848bfcaa 100644
--- a/TODO
+++ b/TODO
@@ -17,6 +17,7 @@ Waf 1.9
 * Detect Clang by default on FreeBSD instead of gcc
 * Use relative paths in apply_incpaths (and absolute ones when paths cross drives)
 * Let run_once accept a list of *args
+* Let more context commands depend on the configuration
 
 and all other issues listed on https://github.com/waf-project/waf/issues
 
diff --git a/waflib/extras/compat15.py b/waflib/extras/compat15.py
index dcb6c0fa..36050f9d 100644
--- a/waflib/extras/compat15.py
+++ b/waflib/extras/compat15.py
@@ -385,3 +385,26 @@ def install_dir(self, path):
 			pass
 Build.BuildContext.install_dir = install_dir
 
+# before/after names
+repl = {'apply_core': 'process_source',
+	'apply_lib_vars': 'process_source',
+	'apply_obj_vars': 'propagate_uselib_vars',
+	'exec_rule': 'process_rule'
+}
+def after(*k):
+	for key, val in repl.items():
+		if key in k:
+			if Logs.verbose > 1:
+				Logs.error('after %s -> %s' % (key, val))
+			k.replace(key, val)
+	return TaskGen.after_method(*k)
+
+def before(*k):
+	for key, val in repl.items():
+		if key in k:
+			if Logs.verbose > 1:
+				Logs.info('before %s -> %s' % (key, val))
+			k.replace(key, val)
+	return TaskGen.before_method(*k)
+TaskGen.before = before
+