[patch, fortran] Asynchronous I/O, take 3

[Rainer Orth]

Hi Thomas,

>> However, I still don't understand why you insist on the hack with
>> putting the async_io_*.f90 tests into the libgomp testsuite.  Why not
>> just make the pthread requirement explicit with
>>
>> { dg-require-effective-target pthread }
>> { dg-additional-options "-pthread" }
>>
>> and put them in gfortran.dg where they belong?
>
> Because this does not appear to work with Linux. I, like
> most gfortran developers, work on Linux, and I would like to
> catch any failure during regression-testing on my own system,
> if possible.

huh, what doesn't work?  I've just finished an x86_64-pc-linux-gnu
bootstrap with your patch included, added the above to the
async_io_?.f90 tests, linked them to gfortran.dg and ran the tests there
(both 32 and 64-bit multilibs), all PASSed and I verified that they were
linked with -lpthread.

> We have had this discussion with Jakub, and he advised
> us to put all the stuff requiring pthreads into libgomp.

Do you have a pointer to that previous discussion?

> It is debatable if this is a good thing, or if we should
> at least make one round of tests with -pthread enabled.
> However, this is something for the future, and requires knowledge
> of dejagnu that I don't currently have :-)

First of all, we need to see and understand the failure mode, if any.
Making this work with the testsuite is a secondary matter only, and I
can certainly help with that if necessary.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University