06-24-2010, 02:01 AM

Hi,
Is it possible to install GCC 4.5 in macos 10.6.4 and use in xcode 3.2.2?If possible how can i install it and use GCC4.5 in xcode 3.2.2?

How can i build the application using GCC4.5 in OSX 10.6.4 ?

The problem is our mac application crashes,while enabling openMp.The crash is observed in gomp_resolve_num_threads.
(GOMP_parallel_start at parallel.c:70
----> gomp_resolve_num_threads at parallel.c:48)

We are using MacOS 10.6.4 ,GCC 4.2 and xcode 3.2.2 .

Is there any solution for this?
-Thanks.

06-25-2010, 10:52 AM

Just out of curiosity, are you sure it's not a bug in your code? I went to OpenMP and compiled their test code on my system with Xcode 3.2.2 and it compiled and ran fine; granted it was extremely simple code, but it does appear that OpenMP is working at least on a basic level...

here's the code and my output:

#include <omp.h>
#include <stdio.h>
int main() {
#pragma omp parallel
printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), omp_get_num_threads());
}

output:

videoed-imac:test nethfel$ gcc -fopenmp omptest.c
videoed-imac:test nethfel$ ./a.out
Hello from thread 0, nthreads 2
Hello from thread 1, nthreads 2
videoed-imac:test nethfel$

06-28-2010, 12:51 AM

There is known bug in openMp,

SourceForge.net: Equalizer - Parallel Rendering: Detail: 1964341 - OpenMP crashes with multi-pipe configurations