Re: [XEN PATCH v4 18/18] build, include: rework compat-build-header.py

[Jan Beulich <jbeulich@xxxxxxxx>]

On 31.03.2020 12:31, Anthony PERARD wrote:
> Replace a mix of shell script and python script by all python script.
> 
> Remove the unnecessary "grep -v '^# [0-9]'". It is to hide the
> linemarkers generated by the preprocessor. But adding -P inhibit there
> generation, thus the grep isn't needed anymore.
> 
> gcc -E -P and clang -E -P have different behavior. While both don't
> generates linemarkers, gcc also removes all empty lines while clang
> keep them all. We don't need those empty lines, so we don't generates
> them in the final compat/%.h headers. (This replace `uniq` which was
> only de-duplicating empty line.)
> 
> The only changes in the final generated headers it that they don't
> have empty lines anymore.

Making them harder to read? While typically no-one needs to look at
their contents, in case of problems it helps if generated files are
half way accessible to a human as well.

Jan