The startup script used by jconsole (/bin/profile.ijs) doesn't try very hard to understand the file hierarchy it lives in, and just did not work with NixOS. For reasons unknown, it Just Worked for some time, but finally broke with an actual error message every time you launch jconsole in recent versions of nixpkgs.
This commit just overwrites all the heuristics J uses to find out where its installation files are, to point where they actually are put by the installer.
On darwin the compilation would fail with the following warning:
```
clang-7: error: argument unused during compilation: '-fno-strict-overflow' [-Werror,-Wunused-command-line-argument]
```
This error happens because the `-fno-strict-overflow` is passed to the compiler. To fix this, disable the `strictoverflow` hardening feature. Also see #39687.
ZHF: #97479
"But Synthetica", I hear you say, "isn't that a downgrade?".
That's what I originally thought as well! So I emailed the maintainer
for the only other repo that had J on version 808, BSD FreePorts. Since
they also didn't know what was going on here, I emailed Jsoftware
themselves. I got a lovely email back from Mr. Iverson (Jr. I presume?)
himself:
So it has been confirmed from the horse's mouth that this _is_ the
correct version to be on.
I also re-enabled all the tests, since they all pass now, enabled the
build on ARM and Darwin (I don't have access to either kind of machine,
but I don't see why it wouldn't work), and added myself as a maintainer.
Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.
This update was made based on information from https://repology.org/metapackage/j/versions.
These checks were done:
- built on NixOS
- ran ‘/nix/store/s4j1rrnwdrrqdaiyqci4c0cqy3azlnl2-j-808/bin/jconsole -h’ got 0 exit code
- ran ‘/nix/store/s4j1rrnwdrrqdaiyqci4c0cqy3azlnl2-j-808/bin/jconsole --help’ got 0 exit code
- ran ‘/nix/store/s4j1rrnwdrrqdaiyqci4c0cqy3azlnl2-j-808/bin/jconsole help’ got 0 exit code
- found 808 with grep in /nix/store/s4j1rrnwdrrqdaiyqci4c0cqy3azlnl2-j-808
- directory tree listing: https://gist.github.com/3c6f38056c15de42a7496ff1f576064e
