[Bug 40285] Re: libgcc_s.so.1 must be installed for pthread_cancel to work
Bartosz Brachaczek
b.brachaczek at gmail.com
Sun Sep 9 00:04:35 UTC 2012
Adding gcc-4.6 to affected, since it can be reproduced on Precise.
I got also two reports of users having this problem in kadu-0.12.2-2
installed from this PPA for Precise: https://launchpad.net/~patryk-
prezu/+archive/ppa. At least one of them is running i386. The other one
reports that using kadu-0.12.2-1 for this PPA:
https://launchpad.net/~mati75/+archive/kadu fixes the problem for him.
Currently I'm waiting to receive more details from them. I tried
reproducing it on my machine, but without success so far.
** Also affects: gcc-4.6 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/40285
Title:
libgcc_s.so.1 must be installed for pthread_cancel to work
Status in “gcc-3.3” package in Ubuntu:
Fix Released
Status in “gcc-4.4” package in Ubuntu:
Confirmed
Status in “gcc-4.6” package in Ubuntu:
New
Status in “pound” package in Ubuntu:
Invalid
Bug description:
the error:
libgcc_s.so.1 must be installed for pthread_cancel to work
is printed by applications using pthreads and calling:
set the thread to check or cancel:
thread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, NULL);
and then in a tight loop try to lock a mutex and call test cancel like:
while (pthread_mutex_trylock (&progress_lock) ==
EBUSY)
pthread_testcancel ();
if the thread is exited because the parent thread sent a pthread_exit
(NULL); for instance, you will see that error.
gcc thinks that this file is in:
$> gcc --print-file-name=libgcc_s.so.1
/lib/../lib/libgcc_s.so.1
and not /lib/libgcc_s.so.1. though the path should really point to the
same file in the end.
This error is fixed by adding /lib to /etc/ld.so.conf and running
ldconfig
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