ld config libv4l

[nimm2]

Zdravim, nedari se mi spustit jeden simulacni nastroj ModelSim. pri spusteni pise:

Kód: [Vybrat]

adam@adam-athlon:~$ vsim
ERROR: ld.so: object '/usr/lib/libv4l/v4l1compat.so' from /etc/ld.so.preload cannot be preloaded: ignored.
ERROR: ld.so: object '/usr/lib/libv4l/v4l1compat.so' from /etc/ld.so.preload cannot be preloaded: ignored.
ERROR: ld.so: object '/usr/lib/libv4l/v4l1compat.so' from /etc/ld.so.preload cannot be preloaded: ignored.
ERROR: ld.so: object '/usr/lib/libv4l/v4l1compat.so' from /etc/ld.so.preload cannot be preloaded: ignored.

nevi nekdo jak vyresit tento problem s LD? diky, Adam

[Martin 'Želva' Malý]

Vůvec nevím, co jde (nějaká webkamera), ale google mi poradil tohle:

http://ubuntuforums.org/archive/index.php/t-914952.html

In Intrepid, to fix this problem, I installed the libv4l-0 package and preload it with Skype like this:

env LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so skype

This worked beautifully for me too, with my Logitech QuickCam Chat. I edited the entry in my Applications menu so it runs that command instead of just skype when I click it. Thanks so much!

Další problém na Launchpadu: https://answers.launchpad.net/ubuntu/+question/49739

Found a workaround for this.

The core of the problem is that gspca drivers in 8.10 apparently implement V4L2, while many applications are still using V4L1 protocol. See http://hansdegoede.livejournal.com/3636.html .

Diagnostics:
install camstream
start camstream, open trace window, and start camera. Expect to see messages like:
VIDIOCSYNC(1) failed (Invalid argument)

How to workaround this (see also https://lists.linux-foundation.org/pipermail/bugme-janitors/2008-October/011912.html):

1. Download and unpack http://people.atrpms.net/~hdegoede/libv4l-0.5.0.tar.gz
2. See README, and install: sudo make install
3. Open terminal window
4. $ export LD_PRELOAD=/usr/local/lib/libv4l/v4l1compat.so
5. $ camstream
Start camera, should now work.

Je to snad nějaká webkamera? Snad jsem aspoň trochu pomohl.

[MacHala]

ten error s nespustenim modelsimu imho nema nic spolecneho(modelsim by nemel potrebovat knihovny video4linux - kdyztak zkus "ldd vsim")... imho /etc/ld.so.preload ukazuje na neexistujici/jinde umistene knihovny (>pripadne oprav)

btw, predpokladam fit vutbr&&fitkit, ze?

[nimm2]

Martin Maly: No jde prave o to, ze to neni zadna webka, ale simulacni nastroj pro implementaci hardware. Rekl bych, ze ten ModelSim ty graficky knihovny vubec nepouziva. Ale kdo vi.

Machala: Ano, liberouter@fit & fitkit@fit...

Kód: [Vybrat]

adam@adam-athlon:/etc$ cat ld.so.conf
include /etc/ld.so.conf.d/*.conf

adam@adam-athlon:/etc$ cat ld.so.preload
/usr/lib/libv4l/v4l1compat.so

adam@adam-athlon:/etc/ld.so.conf.d$ cat *.conf
/usr/lib/alsa-lib
# libc default configuration
/usr/local/lib
/usr/lib32/alsa-lib
# Multiarch support
/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu


ld.so.preload je nastaven spravne, dle myho.. knihovna /usr/lib/libv4l/v4l1compat.so se na dane ceste nachazi... zkusil jsem ji zakomentovat, ale to modelsim pak zustane viset bez jakyhokoliv vypisu.

Kód: [Vybrat]

adam@adam-athlon:/opt/modeltech/linux$ ldd vsim
ERROR: ld.so: object '/usr/lib/libv4l/v4l1compat.so' from /etc/ld.so.preload cannot be preloaded: ignored.
linux-gate.so.1 =>  (0xf7f0d000)
libc.so.6 => /lib32/libc.so.6 (0xf7d8b000)
/lib/ld-linux.so.2 (0xf7f0e000)


[MacHala]

zkusil jsem ji zakomentovat, ale to modelsim pak zustane viset bez jakyhokoliv vypisu.

hm, to jen dokazuje, ze tenhle error nespusteni modelsimu nezpusobuje... vzhledem k tomu, ze to nic nevypisuje, tak asi nezbyva nic jineho nez zkoumat, jestli neco zajimaveho nevypise strace/ltrace

ale k radam v tomto smeru asi nejsem nejpovolanejsi, protoze se musim priznat, ze ja se o zprovoznovani modelsimu a ise webpacku v linuxu ani nepokousel... ( fit rulezz  )