CLion C++ fatal error: 'process.h' file not found - c++

Question

When I use CLion on a Mac to compile C++ code for highlight removal in a single image, there is an error:
Please help me fix it.
#ifndef QX_CVPR09_CTBF_BASIC_H
#define QX_CVPR09_CTBF_BASIC_H
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <numeric>
#include <vector>
#include <process.h>
#include <direct.h>
#include <io.h>
#include <time.h>
#include <string>
#include <memory.h>
#include <algorithm>
#include <functional> // For greater<int>()
#include <iostream>
#if _MSC_VER > 1020 // if VC++ version is > 4.2
using namespace std; // std c++ libs implemented in std
#endif
#define QX_DEF_PADDING 10
#define QX_DEF_THRESHOLD_ZERO 1e-6
class qx_timer {public: void start(); float stop(); void time_display(char *disp=""); void fps_display(char *disp=""); private: clock_t m_begin; clock_t m_end;};
It's a part of my code. The full code is too long.

Answer 1

process.h
process.h is a C header file which contains function declarations and
macros used in working with threads and processes. Most C compilers
that target DOS, Windows 3.1x, Win32, OS/2, Novell NetWare or DOS
extenders supply this header and the library functions in their C
library. Neither the header file nor most of the functions are defined
by either the ANSI/ISO C standard or by POSIX.
Depends on which platform you compile and what standard you use. If you are on linux or compile with c99/ansi standard then this header will probably just not be available (which might be your error)