Why Am I Getting "undefined reference to boost::system::system_category()" When Compiling?

Error: undefined reference to boost::system::system_category() When Compiling

While attempting to compile a program that utilizes Boost libraries on Ubuntu 11.10, you may encounter the following error:

undefined reference to boost::system::system_category()

Root Cause:

The error stems from the dependency of the specific library being used on the boost_system library, which is not automatically included in the compilation process.

Solution:

To address this issue, you need to explicitly specify the boost_system library in the compilation command line. Assuming you're using gcc, modify the command line to add the -lboost_system flag. This instructs the compiler to link against the boost_system library, making the necessary dependencies available.

Example:

gcc -lboost_system ... <other compiler flags> ...

By incorporating this change, you ensure that the compiler has access to the required symbols from the boost_system library, resolving the linking error and allowing for successful compilation.

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