ERROR: x265 not found using pkg-config

[Former user]

getting "x265 not found using pkg-config" I cant enable x265 in FFmpeg

I followed Werner Robitza steps, and I still have the problem

https://bitbucket.org/multicoreware/x265/issues/125/x265-not-found-using-pkg-config

[Toon Toetenel]

Adding

#include <stdbool.h>

to source/x265.h fixed it for me.

I used to build ffmpeg with x265 all the time using the same script derived from https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu but just recently I had to deal with this error.