Handle extensions=None case.

e562ca72 · Robert Bradshaw · 649c4da4 · e562ca72
Commit e562ca72 authored Sep 07, 2016 by Robert Bradshaw
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Showing with 4 additions and 3 deletions

Cython/Distutils/build_ext.py Cython/Distutils/build_ext.py +4 -3

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--- a/Cython/Distutils/build_ext.py
+++ b/Cython/Distutils/build_ext.py
@@ -12,7 +12,8 @@ else:

 class build_ext(_build_ext.build_ext, object):
    def finalize_options(self):
-        from Cython.Build.Dependencies import cythonize
-        self.distribution.ext_modules[:] = cythonize(
-            self.distribution.ext_modules)
+        if self.distribution.ext_modules:
+            from Cython.Build.Dependencies import cythonize
+            self.distribution.ext_modules[:] = cythonize(
+                self.distribution.ext_modules)
        super(build_ext, self).finalize_options()