Question

I’m working on an embedded systems which provides an interface with certain types.

The problem is by including certain headers from c standard library I get an error: conflicting types

I use gettimeofday and I’m only using struct timeval, yet for using this sys/time.h also drags in time_t which interferes with the one defined by the system.

I can’t touch either of those pieces of code and I need them both.

Is there a way to get around such issues? (I should be able to use the systems’ declared types and some functions declared in c headers, headers which contain some declarations already done by the system.)

Answer 1

You can use macros to rename one of the time_t typedefs without modifying any headers:

#define time_t LIBC_time_t
#include <sys/time.h>
#undef time_t

#include <header_which_defines_the_time_t_you_want.h>

This is not guaranteed to work, but it does work a lot of the time.