configure.in (getlogin,getgid,getuid, [...]): Check.

configure.in (getlogin,getgid,getuid, [...]): Check.

	* libU77/configure.in (getlogin,getgid,getuid, kill,link,ttyname):
	Check.
	* libU77/config.h.in (HAVE_GETLOGIN, HAVE_GETGID, HAVE_GETUID,
	HAVE_KILL, HAVE_LINK, HAVE_TTYNAME): New defs.
	* libU77/getlog_.c: Conditionalize for target platform. Set errno
	to ENOSYS if target libc doesn't have the function.
	* libU77/getgid_.c: Likewise.
	* libU77/getuid_.c: Likewise.
	* libU77/kill_.c: Likewise.
	* libU77/link_.c: Likewise.
	* libU77/ttynam_.c: Likewise.

From-SVN: r17562