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Message-ID: <4B46E838.9050803@users.sourceforge.net>
Date: Fri, 08 Jan 2010 02:09:28 -0600
From: "Yaakov (Cygwin/X)" <yselkowitz AT users DOT sourceforge DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: gcc4: OpenMP vs. <math.h>
References: <4B46E171 DOT 4060603 AT users DOT sourceforge DOT net>
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On 08/01/2010 01:40, Yaakov (Cygwin/X) wrote:
> However, I just encountered tonight a much larger conflict: OpenMP/C++
> and <math.h> are incompatible. STC attached:

Here's the file I meant to attach.


Yaakov

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 filename="openmp.cxx"

// http://en.wikipedia.org/wiki/OpenMP#Hello_World
// with an #include <math.h>
// if you also #include <algorithm>, this *really* blows up

#include <math.h>
#include <omp.h>
#include <iostream>

int main (int argc, char *argv[]) {
	int th_id, nthreads;
#pragma omp parallel private(th_id)
	{
		th_id = omp_get_thread_num();
		std::cout << "Hello World from thread" << th_id << "\n";
#pragma omp barrier
		if ( th_id == 0 ) {
			nthreads = omp_get_num_threads();
			std::cout << "There are " << nthreads << " threads\n";
		}
	}
	return 0;
}


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