I am using Intel C++ Composer XE 2013 SP1 Update 1 with Microsoft Visual Studio 2010. I have a solution with a single project. This project has two large .c source files which take a long time to compile each. When I attempt to use the /MP option, the two source files appear to compile sequentially rather than in parallel. When observing the task manager, I see only one instance of mcpcom.exe, so it seems to confirm that I am compiling on only one core. Any suggestions on how to get parallel compilation of the source files?