[mpich-discuss] Cannot build mpich2-1.0.8p1 (nemesis) with PGI 8.0-4 on Linux x86_64

[Dave Goodell]

So I have some bad news, Gus.  I managed to locate an installation of  
PGI-7.1-6 and got MPICH2-1.0.8p1 to compile and link using it with a  
few tweaks.  Unfortunately the binary it generates always segfaults  
deep down in MPI_Finalize because of some issue related to the inline  
assembly register constraints.  It is possible that this issue could  
be worked-around in our code or maybe it is resolved by the 8.X  
version, but I don't have immediate access to it.  And even if we were  
to solve that issue, I bet there is another one lurking behind it.

I'm afraid that I just have to say that 1.0.8* does not work with  
ch3:nemesis and PGI.  We'll make sure to test it and try to get it  
working for the upcoming 1.1.0 release instead.  As an alternative,  
ch3:sock can be used in 1.0.8.

Sorry,
-Dave

On Apr 1, 2009, at 1:59 PM, Gus Correa wrote:

> Hi Scott, list
>
> Thank you for the suggestion.
> Finding out the right compiler flags is always a pain,
> so it is always worth trying what worked for other people.
>
> I tried to build with "-c9x" added to the CFLAGS.
> Unfortunately the same error happens.
>
> According to Dave Goodell, the fix really requires making changes
> in the configure script to handle the PGI compilers correctly.
>
> As far as I can tell, pgcc abides by the C99 standard
> (or whatever part of it) by default.
> Again, please correct me if I am wrong.
>
> If I do "pgcc -show" it gives me a long list of
> compiler configuration variables, among which these two,
> which suggest to me that the c99 (a.k.a. c9x in pgcc parlance)
> language standard is the default:
>
> C99                 =-x 123 0x80000000
> CARGS               Switches to C compiler
>                    =-x 123 0x80000000 -x 123 4 -x 2 0x400 -x 119  
> 0x20 -alwaysinline /home/sw/pgi/8.0-4/linux86-64/8.0-4/lib/ 
> libintrinsics.il 4
> C
>
> Thank you,
> Gus Correa
> ---------------------------------------------------------------------
> Gustavo Correa
> Lamont-Doherty Earth Observatory - Columbia University
> Palisades, NY, 10964-8000 - USA
> ---------------------------------------------------------------------
>
> Scott Atchley wrote:
>> Hi Gus,
>> I do not know if this is applicable or not, but we have the  
>> following in our MPICH2-MX README:
>>> If you are compiling with Portland Group compilers, you will need  
>>> to also set:
>>>
>>> $ export CFLAGS=-c9x
>> I do not remember why we added it and I have not tested it with the  
>> latest Portland compilers.
>> Scott
>