I'm having exactly the same problem. I'm trying to include boost libraries signals and regex into a 64 bit project. I guess the answer is, that the downloaded libraries are not compatible for 64 bit builds, therefore the linker errors. I believe you need to compile 64 bit versions of the libraries, but I'm new to boost myself... Actually thats what I'm working on right now. Jürgen Waser wrote:

I'm trying to incorporate BOOST signals into my vc8 project. I have built the dynamic libraries with the installer and set the project dependencies accordingly. I have written the simplest signal test code possible. The project compiles, but when linking I get the following error:

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