Optionally make compat socklen_t default to int in bootstrap?

[Martin Husemann <martin%duskware.de@localhost>]

Hey folks,

bootstrap fails for me on an ancient SunOS machine and I am looking for the
proper way to make the 

#ifndef HAVE_SOCKLEN_T
typedef unsigned int socklen_t;
#endif

part of pkgtools/libnbcompat/files/nbcompat/netdb.h

use "int" instead of "unsigned int" when make gets OPSYS=SunOS.

At the source code level I would do:

#ifndef HAVE_SOCKLEN_T
#ifdef DEFAULT_SOCKLEN_T_TO_INT
typedef int socklen_t;
#else
typedef unsigned int socklen_t;
#endif
#endif

(or similar) but I am not sure where to properly (and portably) put the
equivalent of 

CFLAGS +=	-DDEFAULT_SOCKLEN_T_TO_INT

without killing other systems.

Any hints?

Martin