parallelizing in windows gfortran or g95

[marc2]

Hello,
I hope someone can help me with the following problem. I want to parallelize a fortran program but I am bound to a windows machine (which ist he major problem but not the one I am concerned here). I am using either g95 or gfortran as compiler but both produce separate problems. Within gfortran I cannot read files bigger than 2 GB as stream due to a bug that is not solved for the windows version (but for all other versions). Otherwise parallelizing would easy be possible by omp (e.g. omp_set_num_threads() and so on). Due to the bug I changed to g95 compiler where parallelizing should be possible by coarrays.
The suggested test program:

integer :: m[*]

m = THIS_IMAGE()
SYNC ALL

if (THIS_IMAGE() == 1) then
do i=1, NUM_IMAGES()
print *, i, m
enddo
endif
end

produces the error
undefined reference to '__g95_this_image'
undefined reference to '__g95_sync_all'
and so on…..

I therefore have several questions and each answer might help me getting further.

- Has someone parallelized his or her program in fortran on a windows machine and how was that possible?
- Is there a bug free windows gfortran version that is easy to install (I used

http://quatramaran.ens.fr/~coudert/gfortran/)

which makes it possible to read files larger than 2GB without direct access
- How may I get rid of the “undefined reference” errors, s this due to a not up to date version of g95 or did I not include needed libs?

Thank you very much and kindest regards,
Marc

 

[mikrom]

I got the same errors as you.
According to this description

http://www.g95.org/coarray.shtml

I think, that you need to install the coarray console which seems to be available as shareware on

http://www.g95.biz/

 

[marc2]

Hi mikrom,
thanks for your reply, I have been on the suggested page and tried to download the free versions (as it says for 5 coarrays it is free) but these are unfortunately again only for unix and IBM machines. I tried to link the cocon as suggested in another forum but that also didnt work as they are not compatible.
Regards marc

 

[mikrom]

I tried to link the cocon as suggested in another forum but that also didnt work as they are not compatible.

Yes I tried it too - yesterday, but like in your case - it doesn't work for me. I downloaded from the link on the page

http://www.g95.org/coarray.shtml

this file G95 Coarray Console: x86, but it seems to be a version for linux and I need a version which will run with MinGW g95 port on windows.