ref: c1c79f43a6084eddc83de124b371a8b689e310a6
dir: /include/assert.h/
extern void __assert(char *exp, char *file, long line); #undef assert #ifndef NDEBUG # define assert(exp) ((exp) ? (void) 0 : __assert(#exp, __FILE__, __LINE__)) #else # define assert(exp) ((void)0) #endif