How can I see the output of the Visual C++ preprocessor? [duplicate]

Answer 1

cl.exe, the command line interface to Microsoft Visual C++, has three different options for outputting the preprocessed file (hence the inconsistency in the previous responses about Visual C++):

• /E: preprocess to stdout (similar to GCC's -E option)
• /P: preprocess to file
• /EP: preprocess to stdout without #line directives

(copied directly from https://stackoverflow.com/a/277362/3279)

Answer 2

Project properties -> C/C++ -> Preprocessing -> Preprocess to a file: Yes (/P)

The files will be called .i and will be created in the build directory.

Also see the msdn page.