Merge pull request #91 from bfroehle/sys_path_pxd

Search for pxd files in sys.path.

Cython/Compiler/Main.py

@@ -182,7 +182,7 @@ class Context(object):
         # the directory containing the source file is searched first
         # for a dotted filename, and its containing package root
         # directory is searched first for a non-dotted filename.
-        pxd = self.search_include_directories(qualified_name, ".pxd", pos)
+        pxd = self.search_include_directories(qualified_name, ".pxd", pos, sys_path=True)
         if pxd is None: # XXX Keep this until Includes/Deprecated is removed
             if (qualified_name.startswith('python') or
                 qualified_name in ('stdlib', 'stdio', 'stl')):
@@ -221,13 +221,16 @@ class Context(object):
         return path
 
     def search_include_directories(self, qualified_name, suffix, pos,
-                                   include=False):
+                                   include=False, sys_path=False):
         # Search the list of include directories for the given
         # file name. If a source file position is given, first
         # searches the directory containing that file. Returns
         # None if not found, but does not report an error.
         # The 'include' option will disable package dereferencing.
+        # If 'sys_path' is True, also search sys.path.
         dirs = self.include_directories
+        if sys_path:
+            dirs = dirs + sys.path
         if pos:
             file_desc = pos[0]
             if not isinstance(file_desc, FileSourceDescriptor):

tests/run/cimport_from_sys_path.srctree

+PYTHON setup.py build_ext --inplace
+PYTHON -c "import a"
+
+######## setup.py ########
+
+from Cython.Build import cythonize
+from distutils.core import setup
+
+# Add ./site-packages to sys.path
+from os.path import realpath
+import sys
+sys.path.append(realpath('site-packages'))
+
+setup(
+  ext_modules = cythonize("*.pyx"),
+)
+
+######## site-packages/b/__init__.py ########
+
+######## site-packages/b/other.pxd ########
+
+cdef inline foo(int a):
+     return a**2
+
+######## a.pyx ########
+
+from b.other cimport foo
+print foo(10)
+
+cimport b.other
+print b.other.foo(10)