How do I turn on multi-CPU/Core C++ compiles in the Visual Studio IDE (2008)?

Question

I have a Visual Studio 2008 C++ project that has support for using multiple CPUs/cores when compiling. In the VCPROJ file I see this:

<Tool
    Name="VCCLCompilerTool"
    AdditionalOptions="/MP"
    ...

I can't find where that was turned added via the IDE and I want to set up another project that uses all of my cores during compilation.

I found tons of references to the MSDN /MP page but that is for using the command line; I have yet to find any references to setting that with the IDE. How do I do that?

EDIT: To clarify, the two projects are completely separate and are not in the same VCPROJ file. I wanted to turn on support for multiple cores during the C++ compilation phase.

Answer 1

To enable /MP option you could add it to Project Settings->C/C++->Command Line|Additional options. This is the only way to switch it on in vcproj.

Answer 2

Tools > Options > Projects and Solutions > Build and Run > maximum number of parallel project builds