BLD: try adding zlib back to _png libraries

tacaswell · tacaswell · commit 54a1585a6cd2 · 2019-08-24T22:47:04.000-04:00
diff --git a/setupext.py b/setupext.py
@@ -656,7 +656,7 @@ def get_extension(self):
             default_libraries=(
                 ['png', 'z'] if os.name == 'posix' else
                 # libpng upstream names their lib libpng16.lib, not png.lib.
-                [deplib('libpng16')] if os.name == 'nt' else
+                [deplib('libpng16'), deplib('z')] if os.name == 'nt' else
                 []
             ))
         add_numpy_flags(ext)
