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Date: Wed, 12 Nov 2008 14:52:03 -0500 (EST)
From: Daniel Eischen <deischen@freebsd.org>
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To: Mikhail Teterin <mi+mill@aldan.algebra.com>
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Cc: Kostik Belousov <kostikbel@gmail.com>, stable@freebsd.org
Subject: Re: dlopen-ing a library with OpenMP by a non-OpenMP process
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On Wed, 12 Nov 2008, Mikhail Teterin wrote:

> Sent by Kostik Belousov:
>> On Wed, Nov 12, 2008 at 01:09:22PM -0500, Mikhail Teterin wrote:
>> 
>>> Hello!
>>> 
>>> Currently, when a program built without OpenMP (-fopenmp) is trying to 
>>> dlopen a library, built with the feature, the result is a crash from "bad 
>>> system call":
>>>
>>>    #0  0x00000008009a223c in ksem_init () from /lib/libc.so.7
>>>    #1  0x0000000800998a8f in sem_init () from /lib/libc.so.7
>>>    #2  0x00000008011a6537 in omp_get_nested () from /usr/lib/libgomp.so.1
>>>    #3  0x00000008011a3466 in ?? () from /usr/lib/libgomp.so.1
>>>    #4  0x0000000000000002 in ?? ()
>>>    #5  0x00000008005072b2 in dlsym () from /libexec/ld-elf.so.1
>>>    #6  0x0000000800507cd2 in dlopen () from /libexec/ld-elf.so.1
>>>    ...
>>> 
>> Try "kldload sem".
>> 
> Uhm... That worked... I see... Shouldn't sem_init be nicer about it, though? 
> Thanks,

Or perhaps you should read sem(4) ;-)

-- 
DE