dirname module calls AC_LIBOBJ unconditionally

The gl_DIRNAME macro (in dirname.m4) calls AC_LIBOBJ([dirname]) unconditionally, without testing for a working dirname implementation. Also, the dirname module provides a basename implementation, but there is no basename.m4 that would test for this specific function. I need to provide a replaceme

Re: dirname module calls AC_LIBOBJ unconditionally

> The gl_DIRNAME macro (in dirname.m4) calls AC_LIBOBJ([dirname]) > unconditionally, without testing for a working dirname implementation. The dirname module provides dir_name and base_name, not dirname and basename. The reason for this is that POSIX does not allow dirname() or basename() to mall