I updated the media-libs/libpng to 1.4.3 when it became stable on x86, then I deleted the previous libpng12.so and ran revdep-rebuild to fix the dependencies. gnome-panel is identified as broken, but it fails to rebuild. The relevant error message from the build.log is as follows. /bin/sh ../libtool --tag=CC --mode=link i686-pc-linux-gnu-gcc -I.. '-DDEBUG_TRAP=__asm__("int $3")' -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/gtk-2.0 - I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/in clude/freetype2 -I/usr/include/libpng14 -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include /cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng14 -DAVAHI_INTERFACES_DI R=\"/usr/share/avahi/interfaces/\" -O2 -march=pentium4 -pipe -fstack-protector -std=c99 -Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-stateme nt -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wbad-function-cast -W cast-qual -Wcast-align -Wwrite-strings -Winline -Wl,-O1 -o avahi-discover-standalone avahi_discover_standalone-main.o ../avahi-common/libavahi-common.la ../avahi-glib/libavahi-gl ib.la ../avahi-core/libavahi-core.la -lglib-2.0 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpango-1.0 -lfreetype -l fontconfig -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lglade-2.0 -lgtk-x11-2.0 -lxml2 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpa ngo-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 libtool: link: cannot find the library `/usr/lib/libpng12.la' or unhandled argument `/usr/lib/libpng12.la' Reproducible: Always Steps to Reproduce: 1. (assuming you have just done the libpng upgrade and deleted libpng12.so) 2. revdep-rebuild 3. Actual Results: emerge of gnome-panel fails. Expected Results: emerge of gnome-panel should work. As discussed on the Gentoo forum at freenode, the problem is because somehow the gnome-panel build process "pulls in" the dependency on libpng12.so from the existing gnome-panel installation. A successful workaround for this is to run first emerge -C --deselect=n gnome-panel and then run the revdep-rebuild again, then there is no previous gnome-panel installation and the build process picks up the correct dependency.
Something looks wrong here - that message come from an la file, but you claim you have run revdep-rebuild. revdep-rebuild should have detected that.
Yes, exactly. There's something wrong in this ebuild. The lafilefixer cannot fix it, I've tried. Almost all the other ebuilds were fixed by revdep-rebuild, except this one and app-text/evince.
For some reason, I doubt lafilefixer actually completed its run. Unless what you've pasted was a result of high parallel make, I don't see libpng12 explicitly listed in the link command, so it almost certainly came from an la file. grep for libpng12.la among la files in /usr/lib.
Definitely from an un-finished upgrade to libpng. Did you use the script provided in the post-install message while upgrading libpng? It corrects the .la file issue.
what Andrew said.
Definitely nothing to do with lafilefixer or an unfinished emerge of anything else. Like I said, the problem is gnome-panel. I have run both lafilefixer and revdep-rebuild several times, they could not fix this problem. The problem was, however, fixed by unmerging gnome-panel and then emerging it again. Can someone reproduce this bug, as follows? 1. Install libpng12.so and not the newest libpng 2. Install gnome-panel 3. Upgrade libpng to libpng14.so 4. Delete libpng12.so 5. Run revdep-rebuild to fix everything 6. Run revdep-rebuild again to fix those things that didn't get fixed 7. Run revdep-rebuild again In 5,6,7, gnome-panel is identified, and it always fails to emerge. If you keep doing revdep-rebuild, gnome-panel is always found and fails emerging. It works if you do 8. emerge -C gnome-panel && emerge gnome-panel Please reconsider validity of this bug. Maybe it's not a priority bug because I am providing a workaround but it is clearly an annoying bug. As an inexperienced gnome user, I thought revdep-rebuild would always fix everything, but in this case it is a problem with the gnome-panel.
Sorry, forgot to mention lafilefixer, add it in the above list at 5.
Just ignore everything except Comment #4 from this bug and read the postinst message from libpng like Andrew pointed out.
I did exactly what it says in the postinst message from libpng. (Copied for information below this message.) The gnome-panel build fails emerging, even when following all the steps indicated in the libpng message and running revdep-rebuild multiple times. If gnome-panel was installed while libpng12.so was present and you follow all the steps as described, it fails to emerge. The current build of gnome-panel has to be unmerged before it will install again successfully, after the upgrade to libpng14. I will stop moaning now, but for future reference, I think it is good keep this bug record open, to point out to other users that they may need to unmerge gnome-panel if they want to make it use the new libpng. The postinst message from libnpg: WARN: postinst Old versions of installed libraries were detected on your system. In order to avoid breaking packages that depend on these old libs, the libraries are not being removed. You need to run revdep-rebuild in order to remove these old dependencies. If you do not have this helper program, simply emerge the 'gentoolkit' package. # revdep-rebuild --library libpng12.so.0 Once you've finished running revdep-rebuild, it should be safe to delete the old libraries. Here is a copy & paste for the lazy: # rm '/usr/lib/libpng12.so.0'
(In reply to comment #9) > The postinst message from libnpg: > > WARN: postinst > Old versions of installed libraries were detected on your system. > In order to avoid breaking packages that depend on these old libs, > the libraries are not being removed. You need to run revdep-rebuild > in order to remove these old dependencies. If you do not have this > helper program, simply emerge the 'gentoolkit' package. > > # revdep-rebuild --library libpng12.so.0 > > Once you've finished running revdep-rebuild, it should be safe to > delete the old libraries. Here is a copy & paste for the lazy: > # rm '/usr/lib/libpng12.so.0' This is not the complete message from the upgrade, it also tells you to run "/usr/sbin/libpng-1.4.x-update.sh" which will fix the problem in Comment #0: libtool: link: cannot find the library `/usr/lib/libpng12.la' or unhandled argument `/usr/lib/libpng12.la' No emerge -C was required, only reading the postinst message and running the update script. Anyway, I'm glad to hear you got it finally solved. Better run the script now or other pkgs might fail the same way.
Dear experts - I had run that command too, after people in the Gentoo forum had told me about it. (Don't ask me why it did not appear in the message I got from libpng updater...) The command does not fix this problem I am describing. There is something wrong in the gnome-panel ebuild and, even after running that command and the revdep-rebuild, it keeps pulling in the dependency on libpng12 from the existing gnome-panel installation. The workaround is to unemerge gnome-panel and then emerge it again. I leave it up to you to reopen and investigate this bug. Has anybody actually tried reproducing this, or did you just close the bug regardless?
(In reply to comment #11) > Dear experts - I had run that command too, after people in the Gentoo forum had > told me about it. (Don't ask me why it did not appear in the message I got from > libpng updater...) > The command does not fix this problem I am describing. There is something wrong > in the gnome-panel ebuild and, even after running that command and the > revdep-rebuild, it keeps pulling in the dependency on libpng12 from the > existing gnome-panel installation. > The workaround is to unemerge gnome-panel and then emerge it again. > I leave it up to you to reopen and investigate this bug. Has anybody actually > tried reproducing this, or did you just close the bug regardless? I have been having the same problem with libpng. But, I solved it by using the 'libpng-1.4.x-update.sh' and the 'lafilefixer --justfixit'. libpng is my worst enemy with Gentoo builds.
