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When setting the emacs USE-flag, gettext should depend on emacs.

I ran into this problem when I resolved a dependency conflict. I unmerged
xorg-x11. Of course, emacs stopped working since it didn't find it's X11
libraries. Thus, building gettext failed. With a dependency on emacs it would
have made sure emacs was properly installed, and that in turn would have pulled
in the correct X11-libraries.

Of course the workaround is trivial. Simply emerge emacs, and it will continue.

Reopen with some errors and emerge --info, I don't see what you mean, sorry.

My fault, I was to involved in this. To me it was obvious by just looking at
the ebuild. I realize now that was because I saw the error when building.

Building gettext (with USE=emacs) requires running emacs at one point. However
the ebuild does not require emacs to be installed first. Example 1:
---------

ew-home ~ # emerge -C emacs
...
ew-home ~ # emerge -av gettext

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] sys-devel/gettext-0.14.5  USE="emacs nls -doc -nocxx" 0 kB

Total size of downloads: 0 kB

Would you like to merge these packages? [Yes/No]

-------------------

Shouldn't it require that emacs be installed? After all, that was what we said
in the USE flags.

This actually does install gettext without errors, but I don't think it
produces what was intended. The reason is that the installer avoids using emacs
if it is not available and thus avoids the error.

I didn't originally trigger the bug that way. I rather removed X11. Thus
running emacs failed because it couldn't find the X11 libraries.

Here is my original example. This describes the situation where emacs is broken
because some of the requred packages were removed.

--------

asterisk2 ~ # emerge -C x11-libs/libX11
...
asterisk2 ~ # emacs
emacs: error while loading shared libraries: libX11.so.6: cannot open shared
object file: No such file or directory

asterisk2 ~ # emerge -av gettext

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] sys-devel/gettext-0.14.5 [0.14.4] USE="emacs nls -doc -nocxx%"
0 kB

Total size of downloads: 0 kB

Would you like to merge these packages? [Yes/No]

...

make[3]: Entering directory
`/var/tmp/portage/gettext-0.14.5/work/gettext-0.14.5/gettext-tools/misc'
WARNING: Warnings can be ignored. :-)
if test "emacs" != no; then \
  set x; \
  list='start-po.el po-mode.el po-compat.el'; for p in $list; do \
    if test -f "$p"; then d=; else d="./"; fi; \
    set x "$@" "$d$p"; shift; \
  done; \
  shift; \
  EMACS="emacs" /bin/sh ../../build-aux/elisp-comp "$@" || exit 1; \
else : ; fi
emacs: error while loading shared libraries: libX11.so.6: cannot open shared
object file: No such file or directory
make[3]: *** [elc-stamp] Error 1
make[3]: Leaving directory
`/var/tmp/portage/gettext-0.14.5/work/gettext-0.14.5/gettext-tools/misc'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory
`/var/tmp/portage/gettext-0.14.5/work/gettext-0.14.5/gettext-tools'
make[1]: *** [all] Error 2
make[1]: Leaving directory
`/var/tmp/portage/gettext-0.14.5/work/gettext-0.14.5/gettext-tools'
make: *** [all-recursive] Error 1

!!! ERROR: sys-devel/gettext-0.14.5 failed.
Call stack:
  ebuild.sh, line 1546:   Called dyn_compile
  ebuild.sh, line 937:   Called src_compile
  gettext-0.14.5.ebuild, line 72:   Called die

------------------

Shouldn't the gettext.ebuild have a line like this. I'm not a fluent
ebuild-programmer, this is just to illustrate what I think is wrong:

DEPEND="emacs? (app-editor/emacs)"

Actually I realize now that the emerge line should have been:

emerge -av --deep --update gettext

However that doesn't work either.

emerge -av --deep --update emacs

does repair things - i.e. - reinstalls x11-libs/libX11

Hope this clears things up. I'm attaching the output of

emerge --info

Portage 2.1.1 (default-linux/x86/2006.1, gcc-3.4.6, glibc-2.3.6-r3,
2.6.10-gentoo-r6 i686)
=================================================================
System uname: 2.6.10-gentoo-r6 i686 AMD Athlon(tm) XP 2600+
Gentoo Base System version 1.6.14
Last Sync: Thu, 28 Sep 2006 00:50:01 +0000
app-admin/eselect-compiler: [Not Present]
dev-java/java-config: [Not Present]
dev-lang/python:     2.3.4, 2.4.2
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     [Not Present]
dev-util/confcache:  [Not Present]
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.59-r7
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1
sys-devel/binutils:  2.16.1-r3
sys-devel/gcc-config: 1.3.13-r2
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O3 -march=athlon-xp -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo"
CXXFLAGS="-O3 -march=athlon-xp -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="http://ftp.du.se/pub/os/gentoo/"
LINGUAS=""
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude='/distfiles' --exclude='/local' --exclude='/packages'"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.sizeit.dmz/gentoo-portage"
USE="x86 3dnow 3dnowext acl alsa apache2 berkdb bitmap-fonts cdr cli crypt cups
dlloader dri elibc_glibc emacs fortran gdbm gpm input_devices_evdev
input_devices_keyboard input_devices_mouse ipv6 isdnlog kernel_linux libg++ mmx
ncurses nls nptl nptlonly pam pcre perl ppds pppd python readline reflection
session spl sse sse2 ssl tcpd threads truetype-fonts type1-fonts udev unicode
usb userland_GNU video_cards_apm video_cards_ark video_cards_ati
video_cards_chips video_cards_cirrus video_cards_cyrix video_cards_dummy
video_cards_fbdev video_cards_glint video_cards_i128 video_cards_i740
video_cards_i810 video_cards_imstt video_cards_mga video_cards_neomagic
video_cards_nsc video_cards_nv video_cards_rendition video_cards_s3
video_cards_s3virge video_cards_savage video_cards_siliconmotion
video_cards_sis video_cards_sisusb video_cards_tdfx video_cards_tga
video_cards_trident video_cards_tseng video_cards_v4l video_cards_vesa
video_cards_vga video_cards_via video_cards_vmware video_cards_voodoo xorg
zlib"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS,
PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY

Kindly run revdep-rebuild, none of gettext business here that you've unmerged
stuff without any thinking... 

Not without thinking. To illustrate that the dependency is broken.

I'm only trying to help here.

The point is that the dependency information in the gettext ebuild is not
sufficient. If you don't want to fix it - fine.

I can certainely get past this. I'm simply trying to improve things so others
don't have to spend time on this.

I removed my X11 because it was outdated (6.9 or whatever) and conflicted with
a newer version. I expected a good behaving dependency system to pull in the
necessary things in the correct order. It didn't.

Thats why I thinkk it's a bug, but I'm not going to fight over it. Go ahead and
leave it broken. I can fix it myself if I need it fixed. Just thought I should
help out a bit.

*** This bug has been marked as a duplicate of 101089 ***

(In reply to comment #5)
> *** This bug has been marked as a duplicate of 101089 ***

Definitely not a duplicate, but a valid issue (although I would use a different
approach to demonstrate the problem).

DEPEND should include "emacs? ( virtual/emacs )".

Without emacs being available, the build system of the package will not install
the Emacs modes (po-mode.el and po-compat.el).

To reproduce:
1. emerge -C emacs
2. emerge gettext
3. emerge emacs
4. emacs foo.po

Will result in error message: "Wrong type argument: stringp, nil" or "Cannot
open load-file: po-mode".

We need keywording for the new emacs{,-cvs} ebuilds first, otherwise we will
get a circular dependency (since the old ones depend on gettext themselves). 

Created an attachment (id=123470) [details]
Patch for gettext-0.16.1.ebuild

Another, maybe cleaner, solution would be to move the Emacs part to a separate
package and PDEPEND on it, as in the attachment.

base-system, could you please comment?

Created an attachment (id=123472) [details]
po-mode-0.16.1.ebuild

Created an attachment (id=123474) [details]
files/51po-mode-gentoo.el

(In reply to comment #8)
> We need keywording for the new emacs{,-cvs} ebuilds first, otherwise we will
> get a circular dependency (since the old ones depend on gettext themselves). 

 As this is mostly done, we (Emacs team) will take care of the changes.  If
there are any objections from base-system, please raise them now.

(In reply to comment #9)
> Another, maybe cleaner, solution would be to move the Emacs part to a separate
> package and PDEPEND on it

Fixed in this way.