Include greenlet.h so we can be installed by buildout.

deps/greenlet/greenlet.h

+/* vim:set noet ts=8 sw=8 : */
+
+/* Greenlet object interface */
+
+#ifndef Py_GREENLETOBJECT_H
+#define Py_GREENLETOBJECT_H
+
+#include <Python.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GREENLET_VERSION "0.4.13"
+
+typedef struct _greenlet {
+	PyObject_HEAD
+	char* stack_start;
+	char* stack_stop;
+	char* stack_copy;
+	intptr_t stack_saved;
+	struct _greenlet* stack_prev;
+	struct _greenlet* parent;
+	PyObject* run_info;
+	struct _frame* top_frame;
+	int recursion_depth;
+	PyObject* weakreflist;
+	PyObject* exc_type;
+	PyObject* exc_value;
+	PyObject* exc_traceback;
+	PyObject* dict;
+} PyGreenlet;
+
+#define PyGreenlet_Check(op)      PyObject_TypeCheck(op, &PyGreenlet_Type)
+#define PyGreenlet_MAIN(op)       (((PyGreenlet*)(op))->stack_stop == (char*) -1)
+#define PyGreenlet_STARTED(op)    (((PyGreenlet*)(op))->stack_stop != NULL)
+#define PyGreenlet_ACTIVE(op)     (((PyGreenlet*)(op))->stack_start != NULL)
+#define PyGreenlet_GET_PARENT(op) (((PyGreenlet*)(op))->parent)
+
+#if (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 7) || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 1) || PY_MAJOR_VERSION > 3
+#define GREENLET_USE_PYCAPSULE
+#endif
+
+/* C API functions */
+
+/* Total number of symbols that are exported */
+#define PyGreenlet_API_pointers  8
+
+#define PyGreenlet_Type_NUM       0
+#define PyExc_GreenletError_NUM   1
+#define PyExc_GreenletExit_NUM    2
+
+#define PyGreenlet_New_NUM        3
+#define PyGreenlet_GetCurrent_NUM 4
+#define PyGreenlet_Throw_NUM      5
+#define PyGreenlet_Switch_NUM     6
+#define PyGreenlet_SetParent_NUM  7
+
+#ifndef GREENLET_MODULE
+/* This section is used by modules that uses the greenlet C API */
+static void **_PyGreenlet_API = NULL;
+
+#define PyGreenlet_Type (*(PyTypeObject *) _PyGreenlet_API[PyGreenlet_Type_NUM])
+
+#define PyExc_GreenletError \
+	((PyObject *) _PyGreenlet_API[PyExc_GreenletError_NUM])
+
+#define PyExc_GreenletExit \
+	((PyObject *) _PyGreenlet_API[PyExc_GreenletExit_NUM])
+
+/*
+ * PyGreenlet_New(PyObject *args)
+ *
+ * greenlet.greenlet(run, parent=None)
+ */
+#define PyGreenlet_New \
+	(* (PyGreenlet * (*)(PyObject *run, PyGreenlet *parent)) \
+	 _PyGreenlet_API[PyGreenlet_New_NUM])
+
+/*
+ * PyGreenlet_GetCurrent(void)
+ *
+ * greenlet.getcurrent()
+ */
+#define PyGreenlet_GetCurrent \
+	(* (PyGreenlet * (*)(void)) _PyGreenlet_API[PyGreenlet_GetCurrent_NUM])
+
+/*
+ * PyGreenlet_Throw(
+ *         PyGreenlet *greenlet,
+ *         PyObject *typ,
+ *         PyObject *val,
+ *         PyObject *tb)
+ *
+ * g.throw(...)
+ */
+#define PyGreenlet_Throw \
+	(* (PyObject * (*) \
+	    (PyGreenlet *self, PyObject *typ, PyObject *val, PyObject *tb)) \
+	 _PyGreenlet_API[PyGreenlet_Throw_NUM])
+
+/*
+ * PyGreenlet_Switch(PyGreenlet *greenlet, PyObject *args)
+ *
+ * g.switch(*args, **kwargs)
+ */
+#define PyGreenlet_Switch \
+	(* (PyObject * (*)(PyGreenlet *greenlet, PyObject *args, PyObject *kwargs)) \
+	 _PyGreenlet_API[PyGreenlet_Switch_NUM])
+
+/*
+ * PyGreenlet_SetParent(PyObject *greenlet, PyObject *new_parent)
+ *
+ * g.parent = new_parent
+ */
+#define PyGreenlet_SetParent \
+	(* (int (*)(PyGreenlet *greenlet, PyGreenlet *nparent)) \
+	 _PyGreenlet_API[PyGreenlet_SetParent_NUM])
+
+/* Macro that imports greenlet and initializes C API */
+#ifdef GREENLET_USE_PYCAPSULE
+#define PyGreenlet_Import() \
+{ \
+	_PyGreenlet_API = (void**)PyCapsule_Import("greenlet._C_API", 0); \
+}
+#else
+#define PyGreenlet_Import() \
+{ \
+	PyObject *module = PyImport_ImportModule("greenlet"); \
+	if (module != NULL) { \
+		PyObject *c_api_object = PyObject_GetAttrString( \
+			module, "_C_API"); \
+		if (c_api_object != NULL && PyCObject_Check(c_api_object)) { \
+			_PyGreenlet_API = \
+				(void **) PyCObject_AsVoidPtr(c_api_object); \
+			Py_DECREF(c_api_object); \
+		} \
+		Py_DECREF(module); \
+	} \
+}
+#endif
+
+#endif /* GREENLET_MODULE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_GREENLETOBJECT_H */

setup.py

@@ -59,6 +59,11 @@ venv_include_dir = os.path.abspath(venv_include_dir)
 if os.path.exists(venv_include_dir):
     include_dirs.append(venv_include_dir)
 
+# If we're installed via buildout, and buildout also installs
+# greenlet, we have *NO* access to greenlet.h at all. So include
+# our own copy as a fallback.
+include_dirs.append('deps')
+
 SEMAPHORE = Extension(name="gevent.__semaphore",
                       sources=["src/gevent/_semaphore.py"],
                       depends=['src/gevent/__semaphore.pxd'],
@@ -137,7 +142,8 @@ install_requires = greenlet_requires + []
 # XXX: This doesn't quite seem to work: pip tries to build the wheel, which
 # fails because greenlet is not installed (it's in a .eggs/ directory in the
 # build directory, but that directory doesn't have includes). Then it installs greenlet,
-# and builds gevent again, which works.
+# and builds gevent again, which works. Of course, now that we ship our own header,
+# this is probably not completely necessary at all.
 setup_requires = greenlet_requires + []
 
 if PYPY: