archivers/gtar-base issue on NetBSD 5

[John Klos <john%ziaspace.com@localhost>]

NetBSD 5, current pkgsrc, two different architectures:

  CC       rawmemchr.o
  CC       readlinkat.o
In file included from readlinkat.c:44:
at-func.c:77:27: error: macro "readlink" requires 3 arguments, but only 1 given
In file included from readlinkat.c:44:
at-func.c: In function 'readlinkat':
at-func.c:77: warning: return makes integer from pointer without a cast
at-func.c:95:55: error: macro "readlink" requires 3 arguments, but only 1 given
at-func.c:95: warning: initialization makes integer from pointer without a cast
at-func.c:132:24: error: macro "readlink" requires 3 arguments, but only 1 given
at-func.c:132: warning: assignment makes integer from pointer without a cast
*** Error code 1