- Get _environ through the NSEnviron call in a MacOSX framework. This allows

us to completely decouple the framework from the executable, so we
  can use a two-level namespace.
- Do framework builds with a twolevel namespace.
- Reorganized the code that creates the minimal framework in the build
  directory, to make it more robust against incomplete frameworks (from
  earlier aborted builds, or builds of previous Python versions).

Modules/posixmodule.c

@@ -276,8 +276,13 @@ extern int lstat(const char *, struct stat *);
 #endif
 
 /* Return a dictionary corresponding to the POSIX environment table */
-
-#if !defined(_MSC_VER) && ( !defined(__WATCOMC__) || defined(__QNX__) )
+#ifdef WITH_NEXT_FRAMEWORK
+/* On Darwin/MacOSX a shared library or framework has no access to
+** environ directly, we must obtain it with _NSGetEnviron().
+*/
+#include <crt_externs.h>
+static char **environ;
+#elif !defined(_MSC_VER) && ( !defined(__WATCOMC__) || defined(__QNX__) )
 extern char **environ;
 #endif /* !_MSC_VER */
 
@@ -289,6 +294,10 @@ convertenviron(void)
 	d = PyDict_New();
 	if (d == NULL)
 		return NULL;
+#ifdef WITH_NEXT_FRAMEWORK
+	if (environ == NULL)
+		environ = *_NSGetEnviron();
+#endif
 	if (environ == NULL)
 		return d;
 	/* This part ignores errors */