GNU bug report logs - #65340
further build failure on Android (Termux)

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Bruno Haible <bruno <at> clisp.org>
Subject: bug#65340: closed (Re: bug#65340: further build failure on
 Android (Termux))
Date: Fri, 18 Aug 2023 12:01:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#65340: further build failure on Android (Termux)

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 65340 <at> debbugs.gnu.org.

-- 
65340: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=65340
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Po Lu <luangruo <at> yahoo.com>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: Bruno Haible <bruno <at> clisp.org>, 65340-done <at> debbugs.gnu.org
Subject: Re: bug#65340: further build failure on Android (Termux)
Date: Fri, 18 Aug 2023 20:00:28 +0800

Gregory Heytings <gregory <at> heytings.org> writes:

>>
>> ./configure [...] --without-all --without-x
>>
>
> Note that you can also build an unrestricted Emacs under Termux.  I
> use configure options that are similar to those of the Termux people:
>
> --disable-autodepend
> --without-imagemagick
> --without-libotf
> --without-xaw3d
> --without-gpm
> --without-dbus
> --without-gconf
> --without-gsettings
> --without-selinux
> --with-json
> --with-modules
> --with-pdumper=yes
> --with-x
> --with-x-toolkit=lucid

If you read the bug report, you would have realized that it revolves
entirely around building Emacs under Termux.  And adjustments to
config.guess to facilitate such endeavors.

Also, prior to the last several commits, building master under such an
environment was impossible.

Closing as per Bruno.

[Message part 3 (message/rfc822, inline)]

From: Bruno Haible <bruno <at> clisp.org>
To: bug-gnu-emacs <at> gnu.org
Subject: further build failure on Android (Termux)
Date: Wed, 16 Aug 2023 12:34:02 +0200

After getting past bug#65319 and bug#65339,
the build of Emacs in the Termux app on Android 11 fails:

$ make
...
Dumping under the name emacs.pdmp
Dumping fingerprint: 231a76223bb9dd03b59400f731ac83c210b62f43015b9f12d53894ae244c6b77
Dump complete
Byte counts: header=100 hot=3947676 discardable=70896 cold=3671984
Reloc counts: hot=441711 discardable=4726
Adding name emacs-30.0.50.1

Error: permission-denied ("Adding new name" "Permission denied" "/data/data/com.termux/files/home/emacs/src/emacs" "/data/data/com.termux/files/home/emacs/src/emacs-30.0.50.1")
  mapbacktrace(#[1028 "\1\4\203\24\0\301\302!\210\300\4!\210\301\303!\210\202\35\0\301\304!\210\3\3B\262\1\211\2035\0\300\1@!\210\211A\211\262\2\2035\0\301\305!\210\202!\0\301\306!\207" [prin1 princ "  " "(" "  (" " " ")\n"] 7 "\n\n(fn EVALD FUNC ARGS FLAGS)"])
  debug-early-backtrace()
  debug-early(error (permission-denied "Adding new name" "Permission denied" "/data/data/com.termux/files/home/emacs/src/emacs" "/data/data/com.termux/files/home/emacs/src/emacs-30.0.50.1"))
  add-name-to-file("/data/data/com.termux/files/home/emacs/src/emacs" "/data/data/com.termux/files/home/emacs/src/emacs-30.0.50.1" t)
  (let ((name (format "emacs-%s.%d" emacs-version emacs-build-number)) (exe (if (eq system-type 'windows-nt) ".exe" ""))) (while (string-match "[^-+_.a-zA-Z0-9]+" name) (setq name (concat (downcase (substring name 0 (match-beginning 0))) "-" (substring name (match-end 0))))) (message "Adding name %s" (concat name exe)) (add-name-to-file (expand-file-name (concat "emacs" exe) invocation-directory) (expand-file-name (concat name exe) invocation-directory) t) (when (equal dump-mode "pdump") (message "Adding name %s" (concat name ".pdmp")) (add-name-to-file (expand-file-name "emacs.pdmp" invocation-directory) (expand-file-name (concat name ".pdmp") invocation-directory) t)))
  (if (not (or (eq system-type 'ms-dos) (eq system-type 'haiku) (featurep 'android) (member dump-mode '("pbootstrap" "bootstrap")))) (let ((name (format "emacs-%s.%d" emacs-version emacs-build-number)) (exe (if (eq system-type 'windows-nt) ".exe" ""))) (while (string-match "[^-+_.a-zA-Z0-9]+" name) (setq name (concat (downcase (substring name 0 (match-beginning 0))) "-" (substring name (match-end 0))))) (message "Adding name %s" (concat name exe)) (add-name-to-file (expand-file-name (concat "emacs" exe) invocation-directory) (expand-file-name (concat name exe) invocation-directory) t) (when (equal dump-mode "pdump") (message "Adding name %s" (concat name ".pdmp")) (add-name-to-file (expand-file-name "emacs.pdmp" invocation-directory) (expand-file-name (concat name ".pdmp") invocation-directory) t))))
  (let ((output (cond ((equal dump-mode "pdump") "emacs.pdmp") ((equal dump-mode "dump") "emacs") ((equal dump-mode "bootstrap") "emacs") ((equal dump-mode "pbootstrap") "bootstrap-emacs.pdmp") (t (error "Unrecognized dump mode %s" dump-mode))))) (when (and (featurep 'native-compile) (equal dump-mode "pdump")) (setq native-comp-enable-subr-trampolines t)) (message "Dumping under the name %s" output) (condition-case nil (delete-file output) (file-error nil)) (let (success) (unwind-protect (let ((tmp-dump-mode dump-mode) (dump-mode nil) (lexical-binding nil)) (if (member tmp-dump-mode '("pdump" "pbootstrap")) (dump-emacs-portable (expand-file-name output invocation-directory)) (dump-emacs output (if (eq system-type 'ms-dos) "temacs.exe" "temacs")) (message "%d pure bytes used" pure-bytes-used)) (setq success t)) (unless success (ignore-errors (delete-file output))))) (if (not (or (eq system-type 'ms-dos) (eq system-type 'haiku) (featurep 'android) (member dump-mode '("pbootstrap" "bootstrap")))) (let ((name (format "emacs-%s.%d" emacs-version emacs-build-number)) (exe (if (eq system-type 'windows-nt) ".exe" ""))) (while (string-match "[^-+_.a-zA-Z0-9]+" name) (setq name (concat (downcase (substring name 0 (match-beginning 0))) "-" (substring name (match-end 0))))) (message "Adding name %s" (concat name exe)) (add-name-to-file (expand-file-name (concat "emacs" exe) invocation-directory) (expand-file-name (concat name exe) invocation-directory) t) (when (equal dump-mode "pdump") (message "Adding name %s" (concat name ".pdmp")) (add-name-to-file (expand-file-name "emacs.pdmp" invocation-directory) (expand-file-name (concat name ".pdmp") invocation-directory) t)))) (kill-emacs))
  (if dump-mode (let ((output (cond ((equal dump-mode "pdump") "emacs.pdmp") ((equal dump-mode "dump") "emacs")Adding new name: Permission denied, /data/data/com.termux/files/home/emacs/src/emacs, /data/data/com.termux/files/home/emacs/src/emacs-30.0.50.1
 ((equal dump-mode "bootstrap") "emacs") ((equal dump-mode "pbootstrap") "bootstrap-emacs.pdmp") (t (error "Unrecognized dump mode %s" dump-mode))))) (when (and (featurep 'native-compile) (equal dump-mode "pdump")) (setq native-comp-enable-subr-trampolines t)) (message "Dumping under the name %s" output) (condition-case nil (delete-file output) (file-error nil)) (let (success) (unwind-protect (let ((tmp-dump-mode dump-mode) (dump-mode nil) (lexical-binding nil)) (if (member tmp-dump-mode '("pdump" "pbootstrap")) (dump-emacs-portable (expand-file-name output invocation-directory)) (dump-emacs output (if (eq system-type 'ms-dos) "temacs.exe" "temacs")) (message "%d pure bytes used" pure-bytes-used)) (setq success t)) (unless success (ignore-errors (delete-file output))))) (if (not (or (eq system-type 'ms-dos) (eq system-type 'haiku) (featurep 'android) (member dump-mode '("pbootstrap" "bootstrap")))) (let ((name (format "emacs-%s.%d" emacs-version emacs-build-number)) (exe (if (eq system-type 'windows-nt) ".exe" ""))) (while (string-match "[^-+_.a-zA-Z0-9]+" name) (setq name (concat (downcase (substring name 0 (match-beginning 0))) "-" (substring name (match-end 0))))) (message "Adding name %s" (concat name exe)) (add-name-to-file (expand-file-name (concat "emacs" exe) invocation-directory) (expand-file-name (concat name exe) invocation-directory) t) (when (equal dump-mode "pdump") (message "Adding name %s" (concat name ".pdmp")) (add-name-to-file (expand-file-name "emacs.pdmp" invocation-directory) (expand-file-name (concat name ".pdmp") invocation-directory) t)))) (kill-emacs)))
  (if (eq system-type 'android) (progn (when (not noninteractive) (let ((temp-dir (getenv "TEMP")) (dump-file-name (format "%semacs-%s.pdmp" (file-name-as-directory "~") pdumper-fingerprint)) (dump-temp-file-name (format "%s~emacs-%s.pdmp" (file-name-as-directory "~") pdumper-fingerprint))) (unless (pdumper-stats) (condition-case nil (progn (dump-emacs-portable dump-temp-file-name) (rename-file dump-temp-file-name dump-file-name) nil) (error nil)))))) (if dump-mode (let ((output (cond ((equal dump-mode "pdump") "emacs.pdmp") ((equal dump-mode "dump") "emacs") ((equal dump-mode "bootstrap") "emacs") ((equal dump-mode "pbootstrap") "bootstrap-emacs.pdmp") (t (error "Unrecognized dump mode %s" dump-mode))))) (when (and (featurep 'native-compile) (equal dump-mode "pdump")) (setq native-comp-enable-subr-trampolines t)) (message "Dumping under the name %s" output) (condition-case nil (delete-file output) (file-error nil)) (let (success) (unwind-protect (let ((tmp-dump-mode dump-mode) (dump-mode nil) (lexical-binding nil)) (if (member tmp-dump-mode '("pdump" "pbootstrap")) (dump-emacs-portable (expand-file-name output invocation-directory)) (dump-emacs output (if (eq system-type 'ms-dos) "temacs.exe" "temacs")) (message "%d pure bytes used" pure-bytes-used)) (setq success t)) (unless success (ignore-errors (delete-file output))))) (if (not (or (eq system-type 'ms-dos) (eq system-type 'haiku) (featurep 'android) (member dump-mode '("pbootstrap" "bootstrap")))) (let ((name (format "emacs-%s.%d" emacs-version emacs-build-number)) (exe (if (eq system-type 'windows-nt) ".exe" ""))) (while (string-match "[^-+_.a-zA-Z0-9]+" name) (setq name (concat (downcase (substring name 0 (match-beginning 0))) "-" (substring name (match-end 0))))) (message "Adding name %s" (concat name exe)) (add-name-to-file (expand-file-name (concat "emacs" exe) invocation-directory) (expand-file-name (concat name exe) invocation-directory) t) (when (equal dump-mode "pdump") (message "Adding name %s" (concat name ".pdmp")) (add-name-to-file (expand-file-name "emacs.pdmp" invocation-directory) (expand-file-name (concat name ".pdmp") invocation-directory) t)))) (kill-emacs))))
  load("loadup.el")
make[2]: *** [Makefile:682: emacs.pdmp] Error 255
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 problem is that the function add-name-to-file attempts to create a
hard link. However, this is not allowed, not even at the shell level:

$ ln ~/hello.c ~/hello1.c
ln: failed to create hard link '/data/data/com.termux/files/home/hello1.c' => '/data/data/com.termux/files/home/hello.c': Permission denied

The Termux people use a symbolic link instead of a hard link:
https://github.com/termux/termux-packages/blob/master/packages/emacs/src-fileio.c.patch

Bruno

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