Cocoa not detected when building on macOS 10.13

[Aaron Jensen <aaronjensen@gmail.com>]

Hi,

I’m not sure what I’m doing wrong, but when I build the emacs-26
branch on macOS 10.13 I don’t get cocoa specific features like
ns-transparent-titlebar

Is detection broken for 10.13?

Fwiw, this is what I ran to configure:

#!/usr/bin/env bash
export PATH="/usr/local/opt/gnu-sed/libexec/gnubin:$PATH"
export LDFLAGS="-L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/lib
-lxml2 -lz -lpthread -licucore"
./autogen.sh
./configure CFLAGS="-I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2
-I/usr/local/opt/imagemagick@6/include" \
            --disable-dependency-tracking \
            --disable-silent-rules \
            --enable-locallisppath=/usr/local/share/emacs/site-lisp \
            --infodir=/usr/local/Cellar/emacs-plus/HEAD-d4c3669_2/share/info/emacs
\
            --prefix=/usr/local/Cellar/emacs-plus/HEAD-d4c3669_2 \
            --with-ns \
            --disable-ns-self-contained \
            --with-modules \
            --with-xml2 \
            --with-gnutls \
            --with-imagemagick \
            --with-rsvg \
            --without-dbus \
            --without-pop \
            --without-makeinfo



Aaron