Changed to pay attention to the 'runtime_library_dirs' list (= 'rpath'
option in the 'build_ext' command):
  * in ccompiler.py: 'gen_lib_options()' now takes 'runtime_library_dirs'
    parameter
  * in unixccompiler.py and msvccompiler.py: now pass
    'self.runtime_library_dirs' to 'gen_lib_options()', and define
    'runtime_library_dir_option()' (although in msvccompiler.py it
    blows up with a DistutilsPlatformError right now!)
diff --git a/Lib/distutils/msvccompiler.py b/Lib/distutils/msvccompiler.py
index bf5257f..7324b8e 100644
--- a/Lib/distutils/msvccompiler.py
+++ b/Lib/distutils/msvccompiler.py
@@ -307,7 +307,9 @@
             self._fix_link_args (objects, output_dir, takes_libs=1,
                                  libraries=libraries, library_dirs=library_dirs)
         
-        lib_opts = gen_lib_options (self, library_dirs, libraries)
+        lib_opts = gen_lib_options (self,
+                                    library_dirs, self.runtime_library_dirs,
+                                    libraries)
         if type (output_dir) not in (StringType, NoneType):
             raise TypeError, "'output_dir' must be a string or None"
         if output_dir is not None:
@@ -348,6 +350,10 @@
     def library_dir_option (self, dir):
         return "/LIBPATH:" + dir
 
+    def runtime_library_dir_option (self, dir):
+        raise DistutilsPlatformError, \
+              "don't know how to set runtime library search path for MSVC++"
+
     def library_option (self, lib):
         return self.library_filename (lib)