Files
nethack/sys/unix
PatR bc6ca2b821 Qt 5 vs 6 'moc'
This is an attempt to address the issue of switching from Qt 5 to
Qt 6 or vice versa on Unix without running 'make spotless'.  Various
*.h files (but not all of them) in win/Qt/ are run through a program
called 'moc' to create new files *.moc that are included by *.cpp.
The problem is that the constructed files use the same names for Qt
5 or 6 but their contents apparently aren't compatible.  This adds
rules (specific to GNU make) that use a pair of timestamp files to
track which version of moc made src/*.moc and to destroy them when
switching Qt versions in order to force their re-creation.

As it stands, a hints file which includes hints/include/compiler.370
is now required in order to build the Qt interface with the Unix
Makefiles.  There's no change for platforms that don't use those and
I've no idea whether something comparable could be done for macOS
Xcode IDE.

The first time make is run with WANT_WIN_QT=1 after this is in place,
all the .moc files will be rebuilt and the subset of .cpp files which
include them will be recompiled.  After that, the .moc files will be
rebuilt as needed--and only as needed--just like any other constructed
files.
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This README provides the instructions for building the unofficial Mac
binaries using the Apple provided developer IDE named XCode.

Establish a developer team in XCode
===================================

Your first step should be to establish a developer team within XCode.
Launch XCode and open the preferences dialog (XCode Menu->Preferences).
Select the "Accounts" tab.  Add an account (usually this should just be
your apple ID account you used to setup the Mac).  After adding the account,
select the account and then add a team (usually this will be just a
personal team for Mac Development).

Obtain your developer team identifier
=====================================

Your DEVELOPMENT_TEAM can be found by opening Keychain Access
(found by Finder->Applications->Utilities).  Click on "My Certificates".
Look for your "Mac Developer" certificate.  Right click on
the certificate to open a dialog that shows certificate details.
Look for "Organizational Unit" among the details.  This ten digit value
is your development team identifier.

Create XCodeLocal.xcconfig file
===============================

Now you need to create the XCodeLocal.xcconfig file that will be used by
XCode to get your development team identifier.  Create the file in
sys/unix and add a single line such as:
DEVELOPMENT_TEAM = XXXXXXXXXX

Where XXXXXXXXXX is replaced with your development team identifier.

Open the project and build
==========================

In XCode open the project file sys/unix/NetHack.xcodeproj, select
the product NetHack and build.  The build results are placed in
~/nethackdir.