Hi

I have created a custom command that generates source code for me.

There is a slight annoyance still, the command is excecuted every single 
time i tell the compiler to build.

Can I make it so that it runs the program only when the source file 
changes or the target file doesn't exist?

I looked at the documentation for add_custom_command and add_custom_target 
but found no direct anwser from either.

I tried using dependencies but nothing came out of that for me.

-mika
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