fatal error: 'stddef.h' file not found

[faveoled]

Hi. I'm not very proficient with C++ and I get the mentioned error when trying to generate bindings. I've tried several solutions found on the Internet but none worked. Running Ubuntu 22.04. Hope someone can help on solutions to the problem.

user@hp-laptop:~/Downloads/scalalibgen$ apt-file search stddef.h | grep clang
castxml: /usr/share/castxml/clang/include/stddef.h
libclang-common-11-dev: /usr/lib/llvm-11/lib/clang/11.1.0/include/stddef.h
libclang-common-12-dev: /usr/lib/llvm-12/lib/clang/12.0.1/include/stddef.h
libclang-common-13-dev: /usr/lib/llvm-13/lib/clang/13.0.1/include/stddef.h
libclang-common-14-dev: /usr/lib/llvm-14/lib/clang/14.0.0/include/stddef.h

user@hp-laptop:~/Downloads/scalalibgen$ clang --version
Ubuntu clang version 14.0.0-1ubuntu1
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

user@hp-laptop:~/Downloads/scalalibgen$ scala-native-bindgen --name xlib /usr/include/X11/Xlib.h --
In file included from /usr/include/X11/Xlib.h:38:
/usr/include/x86_64-linux-gnu/sys/types.h:144:10: fatal error: 'stddef.h' file not found
#include <stddef.h>
         ^~~~~~~~~~
1 error generated.
Error while processing /usr/include/X11/Xlib.h.