xemacs fails to install, won't coexist with emacs

[k6wx (Kristen McIntyre)]

I tried repeatedly to install xemacs, including removing all ports and reinstalling, per the major system upgrade instructions. I always get the same result:

[MacBook-Pro:~] kristen% sudo port install xemacs
--->  Computing dependencies for xemacs
--->  Fetching archive for xemacs
--->  Attempting to fetch xemacs-21.4.22_15+sumo.darwin_19.x86_64.tbz2 from https://packages.macports.org/xemacs
--->  Attempting to fetch xemacs-21.4.22_15+sumo.darwin_19.x86_64.tbz2 from http://fco.it.packages.macports.org/mirrors/macports-packages/xemacs
--->  Attempting to fetch xemacs-21.4.22_15+sumo.darwin_19.x86_64.tbz2 from http://aus.us.packages.macports.org/macports/packages/xemacs
--->  Building xemacs
Error: Failed to build xemacs: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_editors_xemacs/xemacs/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port xemacs failed

If I install regular emacs, which installs successfully, I get this:

[MacBook-Pro:~] kristen% sudo port install xemacs
--->  Computing dependencies for xemacs
Error: Can't install xemacs because conflicting ports are active: emacs
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port xemacs failed

I'm on Catalina, build 19B2106.

[k6wx (Kristen McIntyre)]

The log file for the error.

[mf2k (Frank Schima)]

In the future, please use WikiFormatting, fill in the Port field and add the port maintainer(s) to Cc (port info --maintainers xemacs), if any.

[mf2k (Frank Schima)]

I'm not sure anything can be done about the conflict with emacs.

[k6wx (Kristen McIntyre)]

Really? That seems odd. They are two independent implementations. I've had both installed in other environments. Still, xemacs just doesn't install even when emacs isn't present.

[mf2k (Frank Schima)]

Well hopefully the maintainer will figure it all out soon.

[dstrubbe (David Strubbe)]

No clue why the Catalina installation is failing. There are some errors in the main.log but I'm not what they mean.

Apparently the conflict is due to "etags". I'll see what can be done about that.

[k6wx (Kristen McIntyre)]

This is 100% reproducible for me. If you need any other logs, just let me know.

[dstrubbe (David Strubbe)]

An update: the same build failure happens on Sierra. So, this is not related to Catalina specifically.

[dstrubbe (David Strubbe)]

There is no longer a conflict, as of ​https://github.com/macports/macports-ports/commit/77148c6abdb902e5fe40d8bbad39a1e349318b42

[dstrubbe (David Strubbe)]

The compilation error is a duplicate of #59502. The conflict (which was an enhancement issue, not a defect) is fixed. For the record, "two independent implementations" is exactly the typical situation for why there would be a conflict between ports.