Auto-generating C++ code in a pre-build event using Visual Studio

Question

I'm trying to use a pre-build event in Visual Studio (VS 2005 to be specific) to run a Python script which will automatically generate a .cpp file. The trouble I'm running into is that the compiler doesn't seem to know that this file is dirty and needs to be rebuilt until after the build has finished, which means that I need to build the solution twice -- once to generate this file, and then once more once so that this file actually gets compiled.

Without knowing much about the inner workings of the C++ compiler, my naive guess is that it makes a list of dirty files which need to be recompiled before the pre-build event runs, so it misses this auto-generated file, as it hasn't been touched until after the pre-build event.

Is there any way to inform the compiler that it needs to recompile this file if the pre-build event changes it?

Answer 1

It's not something that I've ever done but you could try invoking the compiler (cl.exe) directly from your pre-build event.

Answer 2

I use msvc 6.

Try...

Put the python script into the project
give it a custom build step that invokes python on it,
to create the cpp file.

Add the cpp file to your project and do a rebuild all.

This is how we do it with the Oracle Pro*C preprocessor. It works fine.

Answer 3

Hi EvilTeach/J. Kyle Pittman

I am looking for similar thing as I want to parse a header file and auto generate a .cpp file from the parsed content. The VC++ project should be able to compile the project including this auto-generated file. I am trying to get this done form past few days but not able to find a way .. can guys please let me know how can I do this ..? or any small sample ... I will really appericaite any kind of help