Hi.
This is Kobungyo.

Following Program is deadlocked under RedHat 7.0 when dynamic linked.
But it work correctly under RedHat6.2 in both dynamic link and static link.
Can I use fstream class from 2 or more threads simultaneously ?

$ c++ a.cc -lpthread  <- does not work
$ c++ -static a.cc -lpthread <- ok. but the object is too large.

--

#include <iostream>
#include <fstream>
#include <pthread.h>

using namespace std;
ofstream file;

void *func(void *){
    file << "Hello, again!" << endl;
    pthread_exit(NULL);
}

int main(){
    file.open("a.txt");
    file << "Hello, Wordl!" << endl;
    
    pthread_t t1;
    pthread_create(&t1, NULL, func, NULL);
    pthread_join(t1, NULL);
}