+AC_CHECK_LIB(gen, getspnam, LIBS="$LIBS -lgen")
+AC_CHECK_LIB(z, deflate, ,AC_MSG_ERROR([*** zlib missing - please install first ***]))
+AC_CHECK_LIB(util, login, AC_DEFINE(HAVE_LIBUTIL_LOGIN) LIBS="$LIBS -lutil")
+
+AC_CHECK_FUNC(regcomp,
+ [],
+ [
+ AC_CHECK_LIB(pcre, pcre_info,
+ AC_DEFINE(HAVE_LIBPCRE) LIBS="$LIBS -lpcreposix -lpcre")
+ ]
+)
+
+dnl UnixWare 2.x
+AC_CHECK_FUNC(strcasecmp,
+ [], [ AC_CHECK_LIB(resolv, strcasecmp, LIBS="$LIBS -lresolv") ]
+)
+AC_CHECK_FUNC(utimes,
+ [], [ AC_CHECK_LIB(c89, utimes, LIBS="$LIBS -lc89") ]
+)
+