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Subject: |
CANNOT_DUMP build assumes Emacs is already installed |
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Date: |
Sun, 20 Nov 2016 13:38:27 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
The CANNOT_DUMP build procedure is confused: it assumes that the current version
of Emacs is already installed, and Emacs builds can fail (or be subtly wrong)
when this assumption is not true. To reproduce the problem, pick a directory
that doesn't exist ("/tmp/prefix" in the example below) and configure and build
this way:
./configure --prefix=/tmp/prefix CANNOT_DUMP=yes
make bootstrap
On my platform (Ubuntu 16.04 x86-64) the build fails as follows:
ln -f temacs bootstrap-emacs
make -C ../lisp compile-first EMACS="../src/bootstrap-emacs"
make[3]: Entering directory '/home/eggert/src/gnu/emacs/static-checking/lisp'
ELC emacs-lisp/macroexp.elc
Warning: Lisp directory '/tmp/prefix/share/emacs/26.0.50/lisp': No such file or
directory
Cannot open load file: No such file or directory, loadup.el
Makefile:282: recipe for target 'emacs-lisp/macroexp.elc' failed
The full command that fails (abbreviated "ELC emacs-lisp/macrorexp.elc above)
is:
EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file --no-site-lisp -l
autoload \
--eval "(setq generate-autoload-cookie \";;;###cal-autoload\")" \
--eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name
\"calendar/cal-loaddefs.el\")))" \
-f batch-update-autoloads ./calendar
Running strace on this command reveals that it attempts to open only:
/tmp/prefix/share/emacs/26.0.50/lisp/loadup.el.elc
/tmp/prefix/share/emacs/26.0.50/lisp/loadup.el.el
/tmp/prefix/share/emacs/26.0.50/lisp/loadup.el
and it never attempts to open loadup.el in the current directory, which is
what's needed here.
By the way, why does Emacs try to open ".../loadup.el.elc"? Isn't that a waste
of time?
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--- Begin Message ---
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Subject: |
Re: bug#24974: CANNOT_DUMP build assumes Emacs is already installed |
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Date: |
Mon, 19 Dec 2016 13:35:47 -0500 |
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User-agent: |
Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) |
Version: 26.1
Daniel Colascione wrote:
>> normal = PATH_LOADSEARCH;
>> + if (!NILP (Vinstallation_directory)) normal = PATH_DUMPLOADSEARCH;
>> +
>> #ifdef HAVE_NS
>> lpath = decode_env_path (0, loadpath ? loadpath : normal, 0);
>> #else
>
> I changed a lot of this code in my portable dumper patch. The new code
> works fine for me with CANNOT_DUMP uninstalled. We can split this change
> (and the corresponding loadup.el changes) out from the rest of the patch
> pretty easily, I think.
I look forward to those changes, but in the meantime I installed my
one-liner as 504e384, since it seems like an improvement, and can't eg
make merging any harder.
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