[svn r38808] trying to be more ignorant about missing abilities

to remove c-extension modules (they might be in
site-packages) and adding a hack to make sure
that the greenlet module gets build ahead of
the setup install.

--HG--
branch : trunk

py/misc/_dist.py

@@ -135,6 +135,12 @@ def set_registry_value(reg, key, value_name, value):
 def setup(pkg, **kw): 
     """ invoke distutils on a given package. 
     """
+    print "precompiling greenlet module" 
+    try:
+        x = py.magic.greenlet()
+    except ImportError:
+        print "could not precompile greenlet module, skipping"
+
     params = Params(pkg)
     #dump(params)
     source = getattr(pkg, '__package__', pkg)

py/misc/buildcmodule.py

@@ -31,10 +31,14 @@ def make_module_from_c(cfile):
         raise ImportError, "cannot find the file name suffix of C ext modules"
     lib = dirpath.join(modname+ext)
 
-    # argl! we need better "build"-locations alltogether!
+    # XXX argl! we need better "build"-locations alltogether!
     if lib.check():
+        try:
             lib.remove()
+        except EnvironmentError:
+            pass # XXX we just use the existing version, bah
 
+    if not lib.check():
         c = py.io.StdCaptureFD()
         try:
             try: