BLD: spring cleaning on Makefile

Makefile

@@ -1,14 +1,13 @@
 tseries: pandas/lib.pyx pandas/tslib.pyx pandas/hashtable.pyx
 	python setup.py build_ext --inplace
 
-.PHONY : clean develop build clean clean_pyc tseries doc
+.PHONY : develop build clean clean_pyc tseries doc
 
-clean: clean_pyc
-	-rm -rf build dist
-	-find . -name '*.so' -exec rm {} \;
+clean:
+	-python setup.py clean
 
 clean_pyc:
-	-find . -name '*.pyc' -exec rm {} \; -or -name '*.pyo' -exec rm {} \;
+	-find . -name '*.py[co]' -exec rm {} \;
 
 sparse: pandas/src/sparse.pyx
 	python setup.py build_ext --inplace
@@ -20,8 +19,7 @@ develop: build
 	-python setup.py develop
 
 doc:
-	-rm -rf doc/build
-	-rm -rf doc/source/generated
+	-rm -rf doc/build doc/source/generated
 	cd doc; \
 	python make.py clean; \
 	python make.py html

doc/source/release.rst

@@ -314,6 +314,8 @@ Bug Fixes
 - Bug in setting a tz-aware index directly via ``.index`` (:issue:`6785`)
 - Bug in expressions.py where numexpr would try to evaluate arithmetic ops
   (:issue:`6762`).
+- Bug in Makefile where it didn't remove Cython generated C files with ``make
+  clean`` (:issue:`6768`)
 
 pandas 0.13.1
 -------------

setup.py

@@ -280,7 +280,7 @@ def initialize_options(self):
                                'ultrajsondec.c',
                                ]
 
-        for root, dirs, files in list(os.walk('pandas')):
+        for root, dirs, files in os.walk('pandas'):
             for f in files:
                 if f in self._clean_exclude:
                     continue
@@ -297,7 +297,7 @@ def initialize_options(self):
                 if d == '__pycache__':
                     self._clean_trees.append(pjoin(root, d))
 
-        for d in ('build',):
+        for d in ('build', 'dist'):
             if os.path.exists(d):
                 self._clean_trees.append(d)