[wwark]

Hi @Milhouse 

I'm able to compile FBAlpha for RPI2.

This issue I have is
function resampler_sinc_process_neon: error: undefined reference to 'process_sinc_neon_asm' collect2: error: ld returned 1 exit status make: *** \[makefile.libretro:646: fbalpha_libretro.so\] Error 1 ADDON FAILED game.libretro.fbalpha

So I changed this file "makefile.libretro_common" (https://pastebin.com/WkEQYqsn) from this package "libretro-fbalpha-79704a667cd0aa5865feffd0f55b6fc4acc13dec".

I changed to compile process_sinc_neon_asm meanwhile the check of Neon is not set and add this line during the link not sure it is required.
# Ensure the sinc_resampler_neon is available for ARM NEON devices.
SOURCES_S += $(LIBRETRO_COMM_DIR)/audio/resampler/drivers/sinc_resampler_neon.o

FBAlpha work great in RPI 3B+ with libreelec 9.x !

I hope it will help to fix this issue.

Thanks,
Wwark