dirname module calls AC_LIBOBJ unconditionally

[Claudio Jolowicz]

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 replacement for basename in case this function is
missing or broken. Although my own system has a working basename, the
portability library is always built.

It seems two things are required: Adding a basename.m4, and writing a
test for a working basename implementation, calling
AC_LIBOBJ([basename]) on failure only. I would be grateful for any
hints how to do this.

Claudio

-- 
Claudio Jolowicz <address@hidden> <http://www.jolowicz.com>
PGP KeyID: C61DFB0C

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