As a C++ developer, your task is to create a sample program that demonstrates the use of the Boost Interprocess library to synchronize processes. Your program should include multiple methods of syncing processes, such as shared memory, semaphores, and message queues. 

In addition, your program should be separated into two executable files that communicate and sync with each other. You can do this by having one program initialize shared memory or a message queue, and then having the second program connect to that memory or queue to exchange data.

Please ensure that your code follows best practices for C++ programming, including proper formatting, documentation, and error handling. Your code should be easy to read and understand, even for developers who are not familiar with the Boost Interprocess library.

Finally, please provide clear instructions on how to compile and run your program, including any necessary dependencies or libraries. Please reply with exactly 4 paragraphs and separate each paragraph with two new lines. The very last paragraph must start with the word "protection".
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