Bugzilla Bug 225429

I downgraded sys-devel/gcc-4.2.4 to sys-devel/gcc-4.2.3 and some libraries were
needlessly preserved:

!!! existing preserved libs:
>>> package: sys-devel/gcc-4.2.3
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgcc_s.so
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so.1
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so.6
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgcc_s.so.1
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so.1.0.0
 *  - /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so.6.0.9
Use emerge @preserved-rebuild to rebuild packages using these libraries

Next I reinstalled virtual/opengl and these libraries were unpreserved:

<<< !needed   sym /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgcc_s.so
<<< !needed   sym /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so
<<< !needed   sym /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so.1
<<< !needed   sym /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so
<<< !needed   sym /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so.6
<<< !needed   obj /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgcc_s.so.1
<<< !needed   obj /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libgomp.so.1.0.0
<<< !needed   obj /usr/lib/gcc/i686-pc-linux-gnu/4.2.4/libstdc++.so.6.0.9

*** Bug 232784 has been marked as a duplicate of this bug. ***

Same with media-libs/libkipi-0.1.6 - 0.1.6-r1 upgrade (move from /usr/lib to
kde prefix). On emerge @preserved-rebuild the depending packages keep linking
to the preserved versions... I guess the workaround is to delete the old
libraries manually and emerge @preserved-rebuild to relink and clean it up?

(In reply to comment #2)
> I guess the workaround is to delete the old
> libraries manually and emerge @preserved-rebuild to relink and clean it up?

Hm no, after the manual rm the @preserved-rebuild becomes empty set, leaving
the files missing in CONTENTS. Not totally clean but bearable I guess...

*** Bug 240367 has been marked as a duplicate of this bug. ***

(In reply to comment #3)
> Hm no, after the manual rm the @preserved-rebuild becomes empty set, leaving
> the files missing in CONTENTS. Not totally clean but bearable I guess...
> 

Or note which packages are in @preserved-rebuild and manually re-emerge them
after deleting the old libraries.

This is fixed in svn r11746.

Actually, the fix in svn r11746 will only work after /etc/ld.so.conf has been
updated with the new paths. I guess we'll have to trigger the relevant code
right after ld.so.conf has been updated.

Should be all fixed now, as of r11749.

This is fixed in 2.2_rc13.