VS2012 mixing C and Cpp, library clash

Question

I am trying to combine some C and C++ code in a project, and before I had no issues with this, but I'm now trying out VS2012 for the first time and I get a lot of errors from a TR1 header that I didn't include explicitely.

I'm thinking it might be a mixup because it's trying to compile my c code with this cpp header. It looks like a C compiler error trying to understand C++ template code. Where can I figure this out from the VS2012 interface? Do I need to do something to my c and cpp files to make the compiler treat them properly?

Error   1   error C2143: syntax error : missing '{' before '<'  C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xtr1common   15  1   example~
Error   2   error C2059: syntax error : '<' C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xtr1common   15  1   example~
Error   3   error C2143: syntax error : missing '{' before '<'  C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xtr1common   20  1   example~
Error   4   error C2059: syntax error : '<' C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xtr1common   20  1   example~
Error   5   error C2016: C requires that a struct or union has at least one member  C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xtr1common   28  1   example~

Answer 1

Never mind. It has been a while since I've used VS and forgot that it doesn't necessarily treat cpp files as c++. I had to set the "compile as" option to c++.