bug#20068: 24.4.91; Too many warnings building Emacs

bug#20068: 24.4.91; Too many warnings building Emacs

[N. Jackson]

Building the latest Emacs 24.5 pretest (24.4.91) from
http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.4.91.tar.xz, I get over
150 warnings (list below).

This is far too many for the user to be able to check all of them so
that they can be confident that they have a good build. Can we reduce
the number of warnings? In particular, can we not fix the warnings about
references to free variables and about the use of functions not known to
be defined?

[Also, is the message "No MH variant found on the system" (which for me
is issued about 20 times during the build) an error or a warning or just
something to be ignored?]

#+BEGIN_QUOTE
emacs-lisp/byte-run.el:36:1:Warning: `macro-declaration-function' is an obsolete function (as of 24.3); use `macro-declarations-alist' instead.
subr.el:32:11:Warning: macro declare-function used to take 2+ arguments, now takes 2-4
files.el:1659:8:Warning: function create-file-buffer used to take 0+ arguments, now takes 1
startup.el:119:1:Warning: global/dynamic var `argi' lacks a prefix
minibuffer.el:1679:12:Warning: display-completion-list called with 2 arguments, but accepts only 1
minibuffer.el:1924:62:Warning: `with-wrapper-hook' is an obsolete macro (as of 24.4); use a <foo>-function variable modified by `add-function'.
minibuffer.el:2878:1:Warning: Unused lexical variable `p1'
minibuffer.el:2878:1:Warning: Unused lexical variable `p2'
abbrev.el:845:8:Warning: `with-wrapper-hook' is an obsolete macro (as of 24.4); use a <foo>-function variable modified by `add-function'.
simple.el:3522:52:Warning: `with-wrapper-hook' is an obsolete macro (as of 24.4); use a <foo>-function variable modified by `add-function'.
mouse.el:94:1:Warning: Unused lexical variable `this-event'
emacs-lisp/lisp.el:310:27:Warning: `font-lock-beginning-of-syntax-function' is an obsolete variable (as of 23.3); use `syntax-begin-function' instead.
term/w32-win.el:238:15:Warning: reference to free variable `libjpeg-version'
term/w32-win.el:254:16:Warning: reference to free variable `libgif-version'
emacs-lisp/float-sup.el:31:1:Warning: global/dynamic var `pi' lacks a prefix
dired-aux.el:421:29:Warning: reference to free variable `lpr-printer-switch'
doc-view.el:1643:16:Warning: `assoc-ignore-case' is an obsolete function (as of 22.1); use `assoc-string' instead.
ielm.el:338:1:Warning: Unused lexical argument `err'
isearchb.el:78:1:Warning: Package iswitchb is obsolete!
pcmpl-gnu.el:162:47:Warning: `pcomplete-suffix-list' is an obsolete variable (as of 24.1).
ses.el:3558:1:Warning: global/dynamic var `row' lacks a prefix
ses.el:3559:1:Warning: global/dynamic var `col' lacks a prefix
wid-edit.el:3320:1:Warning: Unused lexical argument `data'
textmodes/sgml-mode.el:408:1:Warning: global/dynamic var `v2' lacks a prefix
calc/calc.el:3923:1:Warning: the function `math-zerop' is not known to be defined.
org/org-clock.el:1069:13:Warning: call-process-shell-command called with 6 arguments, but accepts only 1-4
org/org.el:24013:1:Warning: the following functions might not be defined at runtime: easy-menu-add, format-spec
org/org-gnus.el:301:1:Warning: the following functions might not be defined at runtime: gnus-summary-goto-subject, gnus-summary-select-article, message-narrow-to-headers, message-generate-headers, message-unquote-tokens, message-tokenize-header, gnus-activate-group, gnus-find-method-for-group, gnus-group-read-group, gnus-summary-goto-article, gnus-group-jump-to-group
org/org-mouse.el:218:18:Warning: `redisplay-dont-pause' is an obsolete variable (as of 24.5).
org/org-src.el:959:1:Warning: the function `org-some' is not known to be defined.
emulation/cua-base.el:1454:1:Warning: the function `delete-active-region' is not known to be defined.
emacs-lisp/cl-extra.el:577:28:Warning: Unused lexical argument `def'
emacs-lisp/cl-macs.el:2900:1:Warning: the function `cl--wrap-in-nil-block' is not known to be defined.
emacs-lisp/eieio.el:558:40:Warning: function `cl--gv-adapt' from cl package called at runtime
emacs-lisp/eieio.el:963:1:Warning: the following functions might not be defined at runtime: gv--defsetter, cl--gv-adapt
emacs-lisp/ewoc.el:501:1:Warning: Unused lexical variable `dll'
emacs-lisp/package.el:293:53:Warning: reference to free variable `epg-gpg-program'
eshell/em-alias.el:217:1:Warning: Unused lexical argument `args'
eshell/em-cmpl.el:271:8:Warning: `pcomplete-suffix-list' is an obsolete variable (as of 24.1).
eshell/em-dirs.el:186:1:Warning: Unused lexical argument `args'
eshell/em-dirs.el:302:1:Warning: Unused lexical argument `args'
eshell/em-rebind.el:225:49:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
eshell/em-script.el:60:1:Warning: Unused lexical argument `args'
eshell/em-tramp.el:97:1:Warning: Unused lexical variable `args'
eshell/em-unix.el:929:1:Warning: Unused lexical variable `args'
eshell/em-unix.el:959:1:Warning: Unused lexical argument `args'
eshell/esh-mode.el:611:1:Warning: Unused lexical argument `err'
eshell/esh-proc.el:161:1:Warning: Unused lexical argument `args'
eshell/esh-var.el:346:1:Warning: Unused lexical variable `args'
mail/mailalias.el:55:1:Warning: global/dynamic var `pattern' lacks a prefix
mail/mailheader.el:102:1:Warning: global/dynamic var `headers' lacks a prefix
mail/supercite.el:709:1:Warning: global/dynamic var `curline' lacks a prefix
net/net-utils.el:918:1:Warning: the function `w32-get-console-output-codepage' is not known to be defined.
gnus/message.el:1890:1:Warning: `make-variable-buffer-local' not called at toplevel
gnus/message.el:5926:1:Warning: global/dynamic var `Date' lacks a prefix
gnus/message.el:5928:1:Warning: global/dynamic var `Organization' lacks a prefix
gnus/message.el:5929:1:Warning: global/dynamic var `From' lacks a prefix
gnus/message.el:5930:1:Warning: global/dynamic var `Path' lacks a prefix
gnus/message.el:5931:1:Warning: global/dynamic var `Subject' lacks a prefix
gnus/message.el:5932:1:Warning: global/dynamic var `Newsgroups' lacks a prefix
gnus/message.el:5934:1:Warning: global/dynamic var `References' lacks a prefix
gnus/message.el:5935:1:Warning: global/dynamic var `To' lacks a prefix
gnus/message.el:5936:1:Warning: global/dynamic var `Distribution' lacks a prefix
gnus/message.el:5937:1:Warning: global/dynamic var `Lines' lacks a prefix
gnus/message.el:5939:1:Warning: global/dynamic var `Expires' lacks a prefix
gnus/mm-uu.el:339:1:Warning: global/dynamic var `entry' lacks a prefix
gnus/mm-view.el:752:1:Warning: the function `epg-decrypt-string' is not known to be defined.
gnus/nnmail.el:1960:31:Warning: `rmail-dont-reply-to-names' is an obsolete variable (as of 24.1); use `mail-dont-reply-to-names' instead.
progmodes/cc-bytecomp.el:427:1:Warning: the function `byte-compile-obsolete' is not known to be defined.
progmodes/cc-defs.el:2270:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-restore-environment, cc-bytecomp-setup-environment, cc-bytecomp-is-compiling, cc-bytecomp-load
progmodes/cc-vars.el:1769:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-langs.el:3273:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-restore-environment
progmodes/cc-engine.el:11071:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-align.el:1337:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-restore-environment
progmodes/cc-awk.el:1151:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-cmds.el:4731:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-fonts.el:235:49:Warning: `make-variable-buffer-local' not called at toplevel
progmodes/cc-fonts.el:2725:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-restore-environment, cc-bytecomp-setup-environment, cc-bytecomp-is-compiling
progmodes/cc-guess.el:576:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-restore-environment
progmodes/cc-menus.el:525:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-styles.el:667:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment
progmodes/cc-mode.el:105:21:Warning: `font-lock-syntactic-keywords' is an obsolete variable (as of 24.1); use `syntax-propertize-function' instead.
progmodes/cc-mode.el:158:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:159:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:159:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:160:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:161:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:161:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:162:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:163:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:164:53:Warning: (lambda nil ...) quoted with ' rather than with #'
progmodes/cc-mode.el:1796:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-is-compiling, cc-bytecomp-restore-environment, cc-bytecomp-setup-environment, c-populate-syntax-table
progmodes/cfengine.el:1241:20:Warning: call-process-shell-command called with 6 arguments, but accepts only 1-4
progmodes/cperl-mode.el:2282:22:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
progmodes/cperl-mode.el:2284:21:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
progmodes/cperl-mode.el:2590:42:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
progmodes/gdb-mi.el:675:1:Warning: Unused lexical argument `arg'
progmodes/idlw-shell.el:4658:1:Warning: the function `comint-filter' is not known to be defined.
progmodes/vhdl-mode.el:2128:1:Warning: Package assoc is obsolete!
calendar/appt.el:548:1:Warning: global/dynamic var `number' lacks a prefix
calendar/cal-bahai.el:348:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-china.el:677:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-coptic.el:182:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-french.el:255:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-hebrew.el:807:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-hebrew.el:815:1:Warning: global/dynamic var `entry' lacks a prefix
calendar/cal-islam.el:334:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-iso.el:147:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-julian.el:203:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-mayan.el:383:1:Warning: global/dynamic var `date' lacks a prefix
calendar/cal-persia.el:210:1:Warning: global/dynamic var `date' lacks a prefix
calendar/diary-lib.el:762:1:Warning: global/dynamic var `number' lacks a prefix
calendar/diary-lib.el:1897:1:Warning: global/dynamic var `date' lacks a prefix
calendar/diary-lib.el:1898:1:Warning: global/dynamic var `entry' lacks a prefix
calendar/lunar.el:251:1:Warning: global/dynamic var `date' lacks a prefix
calendar/solar.el:898:1:Warning: global/dynamic var `date' lacks a prefix
leim/quail/hangul.el:353:32:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
leim/quail/hangul.el:368:26:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
obsolete/cc-compat.el:166:1:Warning: the following functions might not be defined at runtime: cc-bytecomp-load, cc-bytecomp-restore-environment
obsolete/complete.el:836:33:Warning: `completion-base-size' is an obsolete variable (as of 23.2); use `completion-base-position' instead.
obsolete/otodo-mode.el:928:1:Warning: global/dynamic var `date' lacks a prefix
obsolete/otodo-mode.el:929:1:Warning: global/dynamic var `entry' lacks a prefix
obsolete/vip.el:1859:17:Warning: `delete-backward-char' is for interactive use only; use `delete-char' instead.
erc/erc.el:1717:9:Warning: `iswitchb-mode' is an obsolete function (as of 24.4); use `icomplete-mode' or `ido-mode' instead.
erc/erc.el:1720:17:Warning: `iswitchb-mode' is an obsolete function (as of 24.4); use `icomplete-mode' or `ido-mode' instead.
erc/erc.el:5369:27:Warning: global/dynamic var `str' lacks a prefix
play/dunnet.el:1203:22:Warning: `end-of-buffer' is for interactive use only; use `(goto-char (point-max))' instead.
cedet/srecode/srt-wy.el:287:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/srecode/srt-wy.el:312:1:Warning: the following functions might not be defined at runtime: semantic-tag-make-plist, semantic--tag-expand, semantic--tag-put-property
cedet/semantic/complete.el:2227:26:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/complete.el:2232:26:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db.el:711:22:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db.el:714:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db-find.el:348:61:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db-find.el:513:54:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db-find.el:1132:47:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/db-find.el:1148:24:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/grammar.el:99:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:274:18:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:265:65:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:280:9:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:378:37:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:448:24:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/idle.el:922:34:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/lex.el:1446:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/lex.el:1458:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/bovine/c.el:753:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/bovine/c.el:792:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/bovine/el.el:39:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/bovine/make.el:68:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/bovine/scm.el:80:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
*Warning* default value of <<no-type>> tokens changed to QUERY, was NULL_TOKEN
*Warning* default value of <<no-type>> tokens changed to TRUE, was QUERY
*Warning* default value of <<no-type>> tokens changed to FALSE, was TRUE
Grammar in javascript.el contains 2 useless nonterminals and 4 useless rules
cedet/semantic/wisent/javat-wy.el:665:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/wisent/js-wy.el:506:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
cedet/semantic/wisent/python.el:320:13:Warning: Use `with-current-buffer' rather than save-excursion+set-buffer
#+END_QUOTE


In GNU Emacs 24.4.91.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.9)
 of 2015-03-09 on moondust
Windowing system distributor `Fedora Project', version 11.0.11603000
System Description:	Fedora release 21 (Twenty One)

Configured using:
 `configure --prefix=/home/nlj/local/ --enable-checking 'CFLAGS=-O0 -g3
 -ggdb''

Important settings:
  value of $LC_MONETARY: en_DK.utf8
  value of $LC_NUMERIC: en_DK.utf8
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_CA.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  TeX-PDF-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  display-battery-mode: t
  display-time-mode: t
  delete-selection-mode: t
  savehist-mode: t
  iswitchb-mode: t
  desktop-save-mode: t
  cua-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Checking new news...
Reading active file from archive via nnfolder...done
Checking new news...done
nnimap read 0k from localhost
Processing kill file /home/nlj/News/KILL...done
Checking new news...
Reading active file from archive via nnfolder...done
Checking new news...done
nnimap read 0k from localhost
Processing kill file /home/nlj/News/KILL...done

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Features:
(shadow emacsbug compface gnus-fun smiley mm-archive gnus-bcklg qp
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byte-opt bytecomp byte-compile cl-extra cconv eieio-core mm-util
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hashtable-print-readable backquote make-network-process dbusbind
gfilenotify dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 483194 54947)
 (symbols 48 58426 122)
 (miscs 40 6130 5148)
 (strings 32 117753 13377)
 (string-bytes 1 4020854)
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 (heap 1024 83458 8439))

bug#20068: 24.4.91; Too many warnings building Emacs

[Glenn Morris]

If you get that many warnings, you must be doing a bootstrap, which is
unnecessary and not the documented procedure for building (pre)releases.
Following the build instructions gets you 37 warnings, which should drop
to zero with Emacs 25.1 tarfiles where no lisp files should be recompiled.
So for pretests this issue is already nonexistent/solved.

If you bootstrap or build from a VCS checkout then yes, you get a lot of
warnings. History shows that no, we cannot meaningfully reduce the
number. New classes of warnings get added faster than the existing ones
can be removed. And in some cases the desire to be compatible with
multiple Emacs versions makes warnings inevitable (without excessive
jumping through hoops). We are all aware the warnings exist, I don't
think a bug report about it will make them go away.

Lisp compilation errors are never (good enough) platform specific and
can always be ignored by non-developers.

bug#20068: 24.4.91; Too many warnings building Emacs

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Date: Mon, 09 Mar 2015 20:31:08 -0400
> Cc: 20068@debbugs.gnu.org
> 
> 
> If you get that many warnings, you must be doing a bootstrap

No, he isn't.  A small number of Lisp files are byte-compiled when
building a release tarball (this was fixed by you on master, I think),
and the files he mentions are those.

> Lisp compilation errors are never (good enough) platform specific and
> can always be ignored by non-developers.

Indeed, in this case I looked at the reported warnings and saw nothing
grave there, I'm quite sure I saw the same warnings when I built the
pretest.

bug#20068: 24.4.91; Too many warnings building Emacs

[N. Jackson]

At 02:45 -0300 on Tuesday 2015-03-10, Eli Zaretskii wrote:

>> From: Glenn Morris <rgm@gnu.org>
>> 
>> If you get that many warnings, you must be doing a bootstrap
>
> No, he isn't.  A small number of Lisp files are byte-compiled when
> building a release tarball (this was fixed by you on master, I think),
> and the files he mentions are those.

Glen is right, actually. I neglected to read the README and INSTALL
files (Sorry. I've read them now.) and, instead, I just used my usual
build recipe which includes a bootstrap.

Rebuilding with a bare make after a fresh extraction from the tarball, I
get 37 warnings which is much less overwhelming than than 158!

>> Lisp compilation errors are never (good enough) platform specific and
>> can always be ignored by non-developers.
>
> Indeed, in this case I looked at the reported warnings and saw nothing
> grave there, I'm quite sure I saw the same warnings when I built the
> pretest.

Well if nothing can reasonably be done about any of the warnings that's
unfortunate, of course, since it cheapens their value, but it's just one
of those things I suppose. I'm closing this.

Thank you for Emacs.