DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type:content-transfer-encoding;
	 q=dns; s=default; b=oKxCvps0Z4mbKjYRjoiEmlkmEMJItfvm8Mp/R/F/zU9
	uojvKOzKwmEUIj0aJe5mzpHD9DEvwMwo1ja/stiPIwC9Zb8h/IAQ3QQEPngIQe4B
	BrTk+J5FIakqeWfIrkW+MkuyIZD5jChsBdyduWeEsSSOMPD16b26JIkTNYnhd1z8
	=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Message-ID: <51CFC91B.7080104@gmail.com>
Date: Sun, 30 Jun 2013 07:58:51 +0200
From: marco atzeri <marco DOT atzeri AT gmail DOT com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130620 Thunderbird/17.0.7
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: difficulty with c++ boost::thread (1.53.0) on Cygwin 1.7.20(0.266/5/3)
References: <fee89236a34f4d82ab3607bf14531e88 AT star-mountain DOT com>
In-Reply-To: <fee89236a34f4d82ab3607bf14531e88@star-mountain.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Il 6/30/2013 12:00 AM, Lewis Sternberg ha scritto:
>
> first off, I'm getting "cygcheck: Wrong architecture. Only ix86
> executables supported." when running cygcheck.
> That said, ...
>
> The attached multithread.cpp ought to run as far as I can tell from
> Cygwin, Boost, & the web.
> (There is a posting from 2010 regarding problems with building
> boost::thread on Cygwin, but I'm able to build, and anyway, the Cygwin
> package already includes an up-to-date version of boost::thread.
>
> If I try to compile the attached code thus:
>       $  g++ -D THREADED multithread.cpp

no libraries link instruction, so of course "undefined reference"

> I get:
>       /tmp/ccpBRr49.o:multithread.cpp:(.text+0x259): undefined reference to
> `boost::system::generic_category()'
>       /tmp/ccpBRr49.o:multithread.cpp:(.text+0x263): undefined reference to
> `boost::system::generic_category()'
>       /tmp/ccpBRr49.o:multithread.cpp:(.text+0x26d): undefined reference to
> `boost::system::system_category()'
>       /usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld:
> /tmp/ccpBRr49.o: bad reloc address 0xb in
> section`.text$_ZN5boost6system14error_categoryD1Ev[boost::system::error_category::~error_category()]'
>       collect2: ld returned 1 exit status
>
> If I add the option to load libbost_system (as suggested by some threads
> on the web):
>       $  g++ -D THREADED -llibboost_system multithread.cpp

on MS the linking order is important...

$ g++ -D THREADED  multithread.cpp -l boost_system-mt -l boost_thread-mt

$ ./a.exe
0, 0, 0, 0
0, 3.93049e-06, 0, 0

>
> thank you for your attention and (hopefully) help,
> Lewis
>

Regards
Marco


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple