Multi threading in borland - multithreading

Question

I'm programming c++ in Borland c++ 5.02. I'm trying to run this code:
#include <stdio.h>
#include <pthread.h>
#define NUM 5
main()
{
pthread_t t1, t2; /* two threads */
void *print_msg(void *);
pthread_create(&t1, NULL, print_msg, (void *)"hello");
pthread_create(&t2, NULL, print_msg, (void *)"world\n");
pthread_join(t1, NULL);
pthread_join(t2, NULL);
}
But I get this error:
Info :Compiling C:\BC5\BIN\noname00.cpp
Error: noname00.cpp(2,2):Unable to open include file 'PTHREAD.H'
Error: noname00.cpp(8,15):Undefined symbol 'pthread_t'
Error: noname00.cpp(8,15):Statement missing ;
Error: noname00.cpp(12,18):Call to undefined function 'pthread_create'
I highlighted the main error which is caused by 'PTHREAD.H'. I checked the include folder for this file. It doesn't exist. How can I fix this problem?

Answer 1

Borland's C++ toolchain doesn't include a pthreads library, nor does the Windows SDK. You'll either need to use native Win32 thread APIs or get a 3rd party pthreads implementation for Windows.
Some options include:
winpthreads.h: http://locklessinc.com/articles/pthreads_on_windows/
pthreads-win32: https://www.sourceware.org/pthreads-win32/
I have no idea how well those things work with Borland C++ 5.x.
Another alternative is to use a toolchain that includes a pthreads implementation, such as TDM's MinGW toolchain:
http://tdm-gcc.tdragon.net/

Answer 2

your problem is #include <pthread.h>
you need either copy all the pthread related files (.h,.c,.cpp,.hpp,.lib,.obj)
into compiler include folder
or add include path to it in your project/compiler settings
or copy it locally to your project and change #include <pthread.h> to #include "pthread.h"
So compiler did not find the pthread.h header
so no datatype from it is known from compiler side (like pthread_t)
therefore the rest of the errors...