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Subject: Re: [Boost-users] [Ubuntu 8.04] Linking Problem in Eclipse with Boost 1.41 Libraries
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-12-01 11:44:35

Brooks Garrison wrote:

> Volodya,
> Thanks again for your responses :)
>> I recommend you add /usr/local/boost_1_41_0/prefix/lib to LD_LIBRARY_PATH environment variable.
>> This is not a workaround. This is the standard way to make shared libraries installed into a
>> custom location be available at runtime.
>> In fact, I'd recommend creating ~/local directory and using that as
>> prefix for installing anything you install from source. Then, add
>> ~/local/bin to PATH and ~/local/lib to LD_LIBRARY_PATH, and you'll
>> no longer have to tweak any settings when you install something
>> new.
> I did this, and was able to get the Regex example to work. However,
> when I went to test the Thread library (another that I am interested
> using), I run into another linking problem but not during compile
> time. I'm able to compile and link correctly:
> make -k all
> Building file: ../main.cpp
> Invoking: GCC C++ Compiler
> g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d"
> -MT"main.d" -o"main.o" "../main.cpp"
> Finished building: ../main.cpp
> Building target: boost_thread_test
> Invoking: GCC C++ Linker
> g++ -L/home/bgarrison/local/lib ./main.o -lboost_thread -o
> "boost_thread_test"
> Finished building target: boost_thread_test
> Build complete for project boost_thread_test
> but when I try to debug (using the debugger in Eclipse), I get the
> following message:
> /home/bgarrison/Code/boost_thread_test/Debug/boost_thread_test: error
> while loading shared libraries: cannot open
> shared object file: No such file or directory
> This is strange to me because, I know the file it's looking for is in
> the directory specified by the -L parameter. :(

As I have explained earlier, the -L option to the static linker has nothing
to do with dynamic linker. What is the output of

    ls -l /home/bgarrison/local/lib/libboost_thread*

? And did you set LD_LIBRARY_PATH this time? If so, what exact commands did you
use? Did you use 'export'?

- Volodya

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