--- Begin Message ---
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Subject: |
24.5; Unhide --no-line-directive Documentation |
|
Date: |
Mon, 4 Jan 2016 19:41:28 +0000 |
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Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.
Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug. If you can, give a recipe
starting from `emacs -Q':
In trying to create a TAGS file, etags would process the
#line directive in various source files and produce TAGS
files that were unusable because the "file name" included
would be unavailable causing the tags-search to exit before
having seen all files.
I spent a lot of time coming up with a solution to avoid
any files that contained a line directive when the solution
I really needed was already present: --no-line-directive.
It is, however, undocumented and thus the only way to know
about it is to download the source. I downloaded the source
to try and find out what etags was doing wrong with #line
when I discovered this undocumented option.
I see from the source that the --no-line-directive is hidden
by the PRINT_UNDOCUMENTED_OPTIONS_HELP; I think it would be
helpful for others to remove this restriction.
If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
`bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/usr/local/share/emacs/24.5/etc/DEBUG.
In GNU Emacs 24.5.1 (amd64-portbld-freebsd10.1, GTK+ Version 2.24.28)
of 2015-10-23 on 101amd64-default-job-07
Configured using:
`configure --localstatedir=/var --disable-acl --with-dbus
--without-file-notification --with-gconf --with-gif --with-gnutls
--with-gsettings --with-jpeg --with-m17n-flt --with-imagemagick
--with-libotf --with-png --with-toolkit-scroll-bars --with-rsvg
--with-tiff --with-x --with-xft --with-xim --with-xml2 --with-xpm
--with-x-toolkit=gtk2 --with-sound=oss --x-libraries=/usr/local/lib
--x-includes=/usr/local/include --prefix=/usr/local
--mandir=/usr/local/man --infodir=/usr/local/share/emacs/info/
--build=amd64-portbld-freebsd10.1 'CFLAGS=-O2 -pipe -fstack-protector
-fno-strict-aliasing' CPPFLAGS=-I/usr/local/include 'LDFLAGS=
-L/usr/local/lib -Wl,-rpath=/usr/lib:/usr/local/lib -fstack-protector''
Important settings:
value of $LANG: C
locale-coding-system: nil
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
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column-number-mode: t
line-number-mode: t
transient-mark-mode: t
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ietf-drums mm-util help-fns mail-prsvr mail-utils xterm time-date
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer
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custom widget hashtable-print-readable backquote make-network-process
dbusbind dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)
Memory information:
((conses 16 76429 6886)
(symbols 48 17651 0)
(miscs 40 71 128)
(strings 32 9046 4687)
(string-bytes 1 248303)
(vectors 16 7038)
(vector-slots 8 341334 33197)
(floats 8 65 287)
(intervals 56 190 119)
(buffers 960 12))
--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#22306: 24.5; Unhide --no-line-directive Documentation |
|
Date: |
Fri, 15 Jan 2016 10:58:43 +0200 |
> Date: Sun, 10 Jan 2016 00:26:55 +0100
> From: Francesco Potortì <address@hidden>
> Cc: address@hidden, James Muchow <address@hidden>
>
> >Francesco,
> >
> >Are there any reasons to keep this option (and a few others) hidden
> >from the user eyes?
>
> For this specific otion, the logs say that I undocumented it in 2002.
My forensic investigation of the history indicates that it was
first introduced in 2002, and undocumented in 2007.
> As far as I can recall, this was because the option seemed too much
> technical to me, that is of little use and difficult to explain. I
> think I adopted the same criterion for undocumenting the other options.
Well, it seems this option is useful when the original file is no
longer available, which is a legitimate, albeit rare, use case. So I
un-hided it, and also documented it in etags.1 as the fire-escape in
these rare use cases.
I'm therefore marking this bug done.
Thanks.
--- End Message ---