Tyler Roscoe wrote:

> I don't know how to run the preprocessor by itself. If all you are
> trying to do is write out a file containing the contents of entry_1 ...
> entry_n, I wouldn't bother with the preprocessor;

Unfortunately not, the primary goal is to generate a preprocessed
source file. The entry list is just a way
to inform the compiler about the input files involved.
The task is easy on its own, i.e. run gcc with -E, but
it must be invoked with exactly the same CMake-generated parameters as
during regular object compilation. But
this is far beyond my knowledge of CMake.

Best regards
Piotr Wyderski
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