[ELDK] glibc change for eldk 3.1.1

[Levend Sayar]

Hi,Detlev,

> Ok, I'm getting lost here.  Threads are per definition defined on a
> process basis.  pthread_mutex is also a construction which I fail to see
> how to share it between processes.  Can you show me exactly what you
> want to do here?

I aggree with you. AFAIK, mutexes are in fact intra process primitives. But I dont understand why BerkeleyDB says these log lines 
although
we have "pthread_mutex_init" function in our ELDK 3.1.1 toolchain.

bdb(dc=karelarge,dc=com): unable to initialize mutex: Function not implemented
bdb(dc=karelarge,dc=com): PANIC: Function not implemented
bdb(dc=karelarge,dc=com): unable to join the environment

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> Well interprocess synchronization is _per definition_ outside of threads
> as the latter are defined on a process basis.  For interprocess
> communication we have other primitives like SysV IPC, shared memory,
> etc.

Exactly, semaphores for example

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>Can you show me such a wording?  This would be news to me.

BerkeleyDB source code has a comment like this :

"Currently we support one kind of mutex that is intra-process only,
POSIX 1003.1 pthreads, because a variety of systems don't support
the full pthreads API, and our only alternative is test-and-set."

So I thought there is something in the standart like inter process mutex.

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> I do not understand what you are doing here, sorry.

I want to show you the alternatives for mutex  implementation that BerkeleyDB can use. Maybe someone  will
say "You have to choose this one"

_lvnd_
 (^_^)