bug#65339: build failure on Android (Termux)

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From: Bruno Haible <bruno@clisp.org>
To: 65339@debbugs.gnu.org
Subject: bug#65339: build failure on Android (Termux)
Date: Wed, 16 Aug 2023 12:25:21 +0200	[thread overview]
Message-ID: <4722817.cl5Wp8zd50@nimes> (raw)

After working around bug#65319, the build of Emacs in the Termux app
on Android 11 fails like this:

$ make
...
cp -f temacs bootstrap-emacs
rm -f bootstrap-emacs.pdmp
./temacs --batch  -l loadup --temacs=pbootstrap \
	--bin-dest /usr/local/bin/ --eln-dest /usr/local/lib/emacs/30.0.50/
Loading loadup.el (source)...
Dump mode: pbootstrap
Using load-path (/data/data/com.termux/files/home/emacs/lisp /data/data/com.termux/files/home/emacs/lisp/emacs-lisp /data/data/com.termux/files/home/emacs/lisp/progmodes /data/data/com.termux/files/home/emacs/lisp/language /data/data/com.termux/files/home/emacs/lisp/international /data/data/com.termux/files/home/emacs/lisp/textmodes /data/data/com.termux/files/home/emacs/lisp/vc)
Loading emacs-lisp/debug-early (source)...
Loading emacs-lisp/byte-run (source)...
Loading emacs-lisp/backquote (source)...
Loading subr (source)...
Loading keymap (source)...
Loading version (source)...
Loading widget (source)...
Loading custom (source)...
Loading emacs-lisp/map-ynp (source)...
Loading international/mule (source)...
Loading international/mule-conf (source)...
Loading env (source)...
Loading format (source)...
Loading bindings (source)...
Loading window (source)...
Loading /data/data/com.termux/files/home/emacs/lisp/files.el (source)...
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Finding pointers to doc strings...
Finding pointers to doc strings...done
Dumping under the name bootstrap-emacs.pdmp
Dumping fingerprint: 9d1f04d2a4bf5bdeb7c24c37906b24b3cbe2fa79fdbdcaed721520df25d33edb
Dump complete
Byte counts: header=100 hot=7809180 discardable=70896 cold=10881816
Reloc counts: hot=1082237 discardable=4753
fdsan: attempted to close file descriptor 2, expected to be unowned, actually owned by FILE* 0xb678438c
make[2]: *** [Makefile:1012: bootstrap-emacs.pdmp] Aborted
make[2]: *** Deleting file 'bootstrap-emacs.pdmp'
make[2]: Leaving directory '/data/data/com.termux/files/home/emacs/src'
make[1]: *** [Makefile:554: src] Error 2
make[1]: Leaving directory '/data/data/com.termux/files/home/emacs'
make[1]: Entering directory '/data/data/com.termux/files/home/emacs'
***
*** "make all" failed with exit status 2.

The line "fdsan: attempted to close file descriptor 2, expected to be unowned"
is apparently emitted by Android's "file descriptor sanitizer".

There's a discussion of this message here:
https://github.com/termux/termux-packages/issues/6592
and a workaround patch has been posted here:
https://github.com/termux/termux-packages/blob/master/packages/emacs/disable-fdsan.patch

With this workaround patch, the build gets much further: It produces a
working 'src/emacs' executable.

Would it be possible to
  - either change Emacs' FILE / dirfd handling so that it no longer produces
    this fdsan alert,
  - or include the workaround patch in Emacs upstream?

Bruno

next             reply	other threads:[~2023-08-16 10:25 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-16 10:25 Bruno Haible [this message]
2023-08-16 12:38 ` bug#65339: build failure on Android (Termux) Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-16 22:26   ` Bruno Haible
2023-08-22  0:58     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-16 14:19 ` Eli Zaretskii

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