I'm planning to make an FFT project for a Renesas RX microcontroller. Renesas provides a binary lib that works with their proprietary toolchain. It doesn't support GNU/GCC.
Do you know good C or C++ microcontroller-scale libraries that would be portable to another platform? Preferably one you have good experience with.
I've done this before for the ARM CMSIS DSP FFT lib, together with martinvalencia . But that was for a TI Hercules, an ARM controller.
The RX platform that I'm targeting isn't ARM.
If you 've used a good library that you think is portable, let me know....