ref: c56a7fd3e9ff59442c90189030421c2c0a3aad20
dir: /lib/c/include/bits/amd64-sysv/arch/stddef.h/
#ifndef _SIZET typedef unsigned long size_t; #define _SIZET #endif #ifndef _WCHAR_T typedef int wchar_t; #define _WCHAR_T #endif #ifndef _PTRDIFF_T typedef long ptrdiff_t; #define _PTRDIFF_T #endif