Hi, Openmp is a MinGW64 problem, mixing pthreads with openmp is buggy.
Currently I am trying to debug this in their winpthread implementation
but I am no thread expert. Not by far. Any help is welcome.
I have downloaded their svn repository and winpthread is in
experimental/winpthread folder. Standard configure/make with CFLAGS=-g
is enough to get a debug build. Also MSYS is required.
Warning! Uncommented and unindented code in there, prepare for eyesores :p
A minimum test case to reproduce the hang is (compile with -fopenmp)
#include <cstdio>
#include <omp.h>
#include <pthread.h>
void *do_thread(void *) {
int niterations = 200;
int i;
#pragma omp parallel for
for (i = 0; i < niterations; i++)
{
printf ("ducks\n");
}
return NULL;
}
int main() {
pthread_t id;
pthread_create(&id, NULL, do_thread, NULL);
pthread_join (id, NULL);
}
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