Oops, I forgot to include this file in the last commit (46046):

Bug/Patch #1481770: Use .so extension for shared libraries on HP-UX for ia64.

I suppose this could be backported if anyone cares.

Python/dynload_hpux.c

@@ -14,8 +14,8 @@
 #endif
 
 const struct filedescr _PyImport_DynLoadFiletab[] = {
-	{".sl", "rb", C_EXTENSION},
-	{"module.sl", "rb", C_EXTENSION},
+	{SHLIB_EXT, "rb", C_EXTENSION},
+	{"module"SHLIB_EXT, "rb", C_EXTENSION},
 	{0, 0}
 };