libfixmath

The README explicitly states 'Not actively maintained, pull requests welcome,' indicating risks from unaddressed bugs and lack of future updates or support.

It only implements Q16.16 fixed-point format, lacking support for other formats (e.g., Q8.8 or Q32.32), which limits flexibility for varying precision needs in different applications.

Enabling caches for exponents and trigonometry uses significant static memory (32KB and 80KB), which can be prohibitive for extremely memory-constrained embedded systems, as noted in the FIXMATH_NO_CACHE option.

Multiple compile-time definitions like FIXMATH_NO_HARD_DIVISION and FIXMATH_NO_ROUNDING require careful setup and hardware understanding, increasing initial integration effort and potential for errors.