bug#29931: 27.0.50; Slightly suboptimal build behavior on macOS

[Alan Third <alan@idiocy.org>]

On Mon, Jan 01, 2018 at 01:15:09PM +0100, Philipp wrote:
> 
> There are a few small bugs when building on macOS and not passing the
> right configure options.
> 
> 1. When running configure without options, the build fails with an error
> 
> xml.c:26:10: fatal error: 'libxml/tree.h' file not found
> #include <libxml/tree.h>
>          ^~~~~~~~~~~~~~~
> 
> Apparently configure detects libxml2 to be present, but doesn't set the
> correct include path.

This works fine here. Is it possible this was introduced by macOS
10.13?

Do you see the file in /usr/include/libxml2/libxml/?

> 2. When building with --without-libxml2, the build succeeds, but gives
> warnings like
> 
>   GEN      ../../info/auth.info
> ./../emacs/docstyle.texi:3: warning: unrecognized encoding name `UTF-8'.
> 
> This is because macOS ships an ancient version of makeinfo (4.8).  It's
> possible to install a newer version using Homebrew, but that's not in
> PATH and therefore not found.  Maybe configure could also search for
> makeinfo in the Homebrew directory (/usr/local/opt/texinfo/bin)?

I’d think it’s the user’s responsibility to make sure /usr/local/bin
is on their path if they want to use homebrew stuff?
-- 
Alan Third