[Raspbian-devel] ldconfig issue with raspbian, may affect debian too

[peter green]

Steve McIntyre wrote:
> That's not the one to look for. You want:
>
>   Tag_ABI_VFP_args: VFP registers
>
> which is also set there. "readelf -h" also says
>
>   Flags:                             0x5000002, has entry point, Version5 EABI
>
> What does "ldconfig -p" say for you on problematic system?
>   
Sorry It seems when I pasted the stuff from irc (while trimming 
unrelated stuf) I missed the most important line

<mike_t> plugwash, http://pastebin.com/6xPrPQbL

Which says

after upgrade
root at rpi:~# ldd /opt/vc/bin/vcgencmd
        /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so (0xb6f0f000)
        libvcos.so => not found
        libvchiq_arm.so => not found
        libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 
(0xb6ee5000)
        libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0xb6eda000)
        librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0xb6ecb000)
        libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6d9c000)
        /lib/ld-linux-armhf.so.3 (0xb6f1c000)
root at rpi:~# ldconfig -p | fgrep libvcos.so
        libvcos.so (libc6) => /opt/vc/lib/libvcos.so

The issue appears to be related to ld.so cache regeneration during 
upgrade. It didn't happen for me when I took a slightly older raspberry 
pi foundation image and updated it to the latest version but I was able 
to reproduce it by doing.

wget 
http://snapshot.raspbian.org/201302200144/raspbian/pool/main/e/eglibc/libc-bin_2.13-37+rpi1_armhf.deb
dpkg -i libc-bin_2.13-37+rpi1_armhf.deb
rm /var/cache/ldconfig/aux-cache
rm /etc/ld.so.cache
ldconfig
apt-get -f install (which upgrades libc-bin back to 2.13-38)

Once a system is suffering from the issue it is nessacery to remove 
/var/cache/ldconfig/aux-cache and run ldconfig. Removing only 
/etc/ld.so.cache and running ldconfig is not sufficient.

Based on that it seems the soloution is to make libc.preinst remove 
/var/cache/ldconfig/aux-cache as well as /etc/ld.so.cache and bump the 
version that triggers the removals. Do others agree?