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bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr
From: |
Eli Zaretskii |
Subject: |
bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr |
Date: |
Mon, 03 Oct 2022 22:01:48 +0300 |
> From: Jonas Bernoulli <jonas@bernoul.li>
> Cc: 58073@debbugs.gnu.org
> Date: Mon, 03 Oct 2022 20:51:05 +0200
>
> Before I switched away from Gdm3, I had to use a wrapper script, but as
> we found out that does not actually work. For some reason that ends up
> using the elisp libraries from where "make install" put them. Or if
> that has never been run, then emacs fails because it cannot find the
> libraries where it (IMO falsely) expects to find them. The same happens
> when using a shell alias.
>
> The question now is whether *you* consider this a bug worth fixing.
> I would say it is, but I won't insist on it.
It may or may not be a bug; it could be a feature.
When Emacs starts up it needs to decide where to find the pdumper file
and where to find the *.eln files. It does that by looking at the
directory where its executable lives, if it can determine that via
argv[0]. But symlinks could trick that, and if you invoke Emacs
through wrapper scripts or aliases, that could make the above
impossible, because there are no valid leading directories in argv[0].
In that case, the startup code uses Plan B: it goes by its configured
installation location. And since you have the same Emacs both
installed and uninstalled, you get what you see. Or something like
that: to see what really happens, you need to step with a debugger
through the code of the load_pdump function, see where it finds the
pdumper file, and where it decides to look for *.eln (by constructing
the name in emacs_executable, whose leading directory is then used in
dump_do_dump_relocation under 'case RELOC_NATIVE_COMP_UNIT').
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Jonas Bernoulli, 2022/10/02
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Eli Zaretskii, 2022/10/02
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Jonas Bernoulli, 2022/10/02
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Stefan Kangas, 2022/10/02
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Eli Zaretskii, 2022/10/02
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Jonas Bernoulli, 2022/10/03
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Eli Zaretskii, 2022/10/03
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr, Jonas Bernoulli, 2022/10/03
- bug#58073: 29.0.50; Uninstalled emacs sends startup messages to stderr,
Eli Zaretskii <=