View the definition of a macro for a Linux system (alternative)

Once I wanted to see the definition of the time_t type, and initially wanted to find it directly in the/usr/include/time.h, but instead of going to the other one: __time_t (2 underscores),

The result goes to: __std_type __time_t_type __time_t;

Keep looking for: #define __TIME_T_TYPE __syscall_slong_type

Continue: # define __syscall_slong_type __squad_type

Last: # define __squad_type Long int

I faint: just want to check a time_t type, the result has been jumping so many times, is it necessary?

Depressed, suddenly thought, since the back is a macro, then I directly write a small program, and then, with GCC-E to see the final shape is not OK?

So:

#include <stdio.h><time.h>int  main () {    time_t hello;     return 0 ;}

Then: gcc-e t.c > T.I

Then: Vim t.i

Haha: Direct search: time_t

Results: # define __squad_type Long int

Personal feeling relatively fast,:)

View the definition of a macro for a Linux system (alternative)