The background appears to be that on macOS:
* /usr/bin/libtool is an Apple program, that does not support the GNU
interface. It comes with Xcode; Xcode is the usual way to install a
C compiler on this platform.
* To avoid a conflict, people often configure GNU libtool with
--program-prefix=g.
* Thus their libtoolize script will be found as 'glibtoolize'.
But AFAICS there is no 'libtoolize' from Apple.
> + case `uname` in
> + Darwin*) app=glibtoolize ;;
I would still check to see whether 'libtoolize' exists, before trying
'glibtoolize'. Rationale: 'libtoolize' is the default name, 'glibtoolize'
is just a convention used by many people.
Bruno
