Re: libc6-i686: how to use NTLP ?
At Tue, 21 Dec 2004 22:25:57 +0100,
Viktor Horvath wrote:
> For my university, I've to program some easy things with POSIX.4
> semaphores. I know that I need kernel 2.6 and NPTL for that, and I have
> kernel 2.6.7, gcc 3.3.5 and libc6-i686 2.3.2.ds1-19 well installed. But a
> minimal
> program, shown below, compiles flawlessly with "gcc -o minimal -lpthread
> minimal.c",
> but it says "sem_open: function not implemented" at run time, as if I were
> still using
> old LinuxThreads. However, getconf says:
>
> $ getconf _POSIX_SEMAPHORES
> 1
> $ getconf GNU_LIBPTHREAD_VERSION
> NPTL 0.60
>
> and ldd shows that the libraries link to the libc6-i686 versions:
>
> libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0x40025000)
> libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x40035000)
> /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
>
> On Fedora Cora 2 (computer at my university that I connected via ssh), it
> works flawlessly. So does it on the Debian machines of some kind people of
> the debian-user list. Have you any idea what I could be missing?
Because you don't mount tmpfs on /dev/shm. Please use the newer glibc
(>= 2.3.2.ds1-11) or install the latest "initscripts". I guess you
may disable tmpfs on /dev/shm.
Regards,
-- gotom
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