Cannot find boost library

问题:

This is a very basic question, I only post because I've spent already some time into it. This is what I've done so far:

1. Downloaded and compiled the boost library:

   sudo ./bootstrap.sh and sudo ./bjam install

   This way it was installed into /usr/local/lib.

2. In my source code I've added only:

   #include <boost/asio.hpp> using boost::asio::ip::tcp

3. I compile it with:

   g++ -I/usr/lib/jvm/java-6-openjdk/include -L/usr/local/lib -fPIC -lboost_system -shared -o libagent.so agent.cpp

4. However, ldd -d ./libagent.so gives me:

   libboost_system.so.1.46.1 => not found

5. But there is no error thrown, when using the -lboost_system and ls /usr/local/lib gets me among other things:

   libboost_system.so
libboost_system.a

What am I missing?

回答1:

Did the ./bjam install tool also run the ldconfig(8) tool? ldconfig(8) needs to be run after new libraries are installed to update the caches used by ld.so(8) at program execution time.

回答2:

You should compile it with:

g++ -I/usr/lib/jvm/java-6-openjdk/include -L/usr/local/lib -Wl,-rpath,/usr/local/lib -fPIC -lboost_system -shared -o libagent.so agent.cpp

This makes it look for the boost library in /usr/local/lib at runtime, the -L option only makes it look in /usr/local/lib at compile time.

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