[ELDK] glibc change for eldk 3.1.1

[Detlev Zundel]

Talking to myself:

>> 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.
>
> Weird.  Again I looked at the mag page of "pthread_mutex_init" and I do
> not see how one could use this to get to a mutex from another process.
> The _only_ way I can think of is to initialize a mutex and then do a
> fork() afterwards.  This way one would get multiple processes sharing
> the address space.  However one fork documentation[1] says this:
>
>   When a programmer is writing a multi-threaded program, the first
>   described use of fork(), creating new threads in the same program, is
>   provided by the pthread_create() function. The fork() function is thus
>   used only to run new programs, and the effects of calling functions
>   that require certain resources between the call to fork() and the call
>   to an exec function are undefined.
>
> So I doubt that this is legal use of pthread_mutexes.

[1] http://www.opengroup.org/onlinepubs/009695399/functions/fork.html

Cheers
  Detlev

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