Question:
/usr/include/features.h:367:25: fatal error: sys/cdefs.h: No such file or directory
analysis:
Error in compiling 32-bit program on 64 bit host (- M32
option), install the necessary software package;
Solution:
$ sudo apt install gcc-multilib # Generally you can install this, if you can't install the following
$ sudo apt install g++-multilib
$ sudo apt install libc6-dev libc6-dev-i386