Re: [Boost-users] Undefined reference

From: Carl Wainwright (Carl.Wainwright_at_[hidden])
Date: 2007-05-09 12:37:34

David,

Problem solved :-)

Thanks
Carl
 

|-----Original Message-----
|From: boost-users-bounces_at_[hidden] 
|[mailto:boost-users-bounces_at_[hidden]] On Behalf Of 
|David Walthall
|Sent: 09 May 2007 17:21
|To: boost-users_at_[hidden]
|Subject: Re: [Boost-users] Undefined reference
|
|Carl Wainwright wrote:
|> Hi all,
|> 
|> I've started just recently to use boost in my C++ application to 
|> manage some threads. However, when I link my application I 
|get strange 
|> undefined references
|> 
|> g++ -g -O -o test_exe -lcppunit -ldl -lpthread -lboost_thread Main.o
|> test.o
|> test.o(.text+0x874): In function `threadTestCases::spawnThread()':
|> : undefined reference to 
|`boost::thread::thread(boost::function0<void,
|> std::allocator<boost::function_base> > const&)'
|> test.o(.text+0x8b7): In function `threadTestCases::spawnThread()':
|> : undefined reference to `boost::thread::join()'
|> test.o(.text+0x8ce): In function `threadTestCases::spawnThread()':
|> : undefined reference to `boost::thread::~thread()'
|> test.o(.text+0x8eb): In function `threadTestCases::spawnThread()':
|> : undefined reference to `boost::thread::~thread()'
|> collect2: ld returned 1 exit status
|> make: *** [test_exe] Error 1
|> 
|> As you can see I have linked in the boost_thread and pthread 
|but still 
|> I get the problem. My LD_LIBRARY_PATH is correctly setup to 
|define the 
|> path where boost is installed (/usr/lib/)
|> 
|
|Hi Carl,
|
|Try changing the order that you specify the arguments to g++.  
|You'll want to put Main.o and test.o before the request to 
|link in the libraries.
|
|Here is a link that has some more information (it is about 
|DJGPP, but should hold true for your version of g++):
|http://www.delorie.com/djgpp/v2faq/faq8_10.html
|
|
|David
|
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