Some systems need -lucb to compile the mmap module. Add a comment to
this effect.
This address one aspect of SourceForge bug #113797.
diff --git a/Modules/Setup.in b/Modules/Setup.in
index ae9352b..994c687 100644
--- a/Modules/Setup.in
+++ b/Modules/Setup.in
@@ -150,10 +150,13 @@
pwd pwdmodule.c # pwd(3)
grp grpmodule.c # grp(3)
errno errnomodule.c # posix (UNIX) errno values
-mmap mmapmodule.c # Memory-mapped files (also works on Win32)
select selectmodule.c # select(2); not on ancient System V
_socket socketmodule.c # socket(2)
+# Memory-mapped files (also works on Win32).
+# Some platforms require -lucb.
+mmap mmapmodule.c # -lucb
+
# Socket module compiled with SSL support; you must edit the SSL variable:
#SSL=/usr/local/ssl
#_socket socketmodule.c \