# Implementing fypp like pre-processing functionality in fpm

**URL:** <https://fortran-lang.discourse.group/t/implementing-fypp-like-pre-processing-functionality-in-fpm/1550>\
**Category:** Uncategorized\
**Created:** [July 12, 2021, 10:38pm UTC](https://fortran-lang.discourse.group/t/implementing-fypp-like-pre-processing-functionality-in-fpm/1550 "2021-07-12T22:38:02Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![aradi](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/aradi/32/3659_2.png) [@aradi](https://fortran-lang.discourse.group/u/aradi)\
**Post date:** [August 19, 2021, 1:27pm UTC](https://fortran-lang.discourse.group/t/implementing-fypp-like-pre-processing-functionality-in-fpm/1550/10 "2021-08-19T13:27:22Z")

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Please note, that in cases like [Proposal: moving fftpack under fortran-lang - #29 by aradi](https://fortran-lang.discourse.group/t/proposal-moving-fftpack-under-fortran-lang/1711/29), having the preprocessor in Fortran would only give any advantage over the current situation, if the **preprocessor was always compiled with exactly the same compiler as the project**. Otherwise, it won’t have access to the compiler-dependent Fortran internals, like the `real_kinds` array. Probably every compilation of a preprocessor dependent project would then have to start with the compilation of the preprocessor first. Doable, but extra effort when building projects.

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