[mvapich-discuss] mvapich1-0.9.9-beta suggestion for F90

[Bas van der Vlies]

Shaun Rowland wrote:
> Bas van der Vlies wrote:
>> Hello,
>>
>>  I could not build the fortran90 mpich modules because we got an error:
>> {{{
>> checking whether Fortran 90 is compatible with Fortran 77... no
>> configure: error: Fortran 90 and Fortran 77 compilers are not compatible.
>> They generate external symbol names that are different.
>> }}}
>>
>> the following F90 flag solves the problem:
>>   F90=gfortran  F90FLAGS="-ff2c" ./make.mvapich.gen2
>>
>> Just a tip ;-)
> 
> Hi. I've looked into this some more. I think the F90FLAGS you mention
> might only be necessary depending on the version of g77 and gfortran you
> are trying to use. On our systems, I can use g77 and gfortran (for F77
> and F90) without setting F90FLAGS. I assume you are trying to do this
> and getting the error because the program should be from different
> versions of GCC. So, if the above works and lets you use g77 and
> gfortran, that's useful information.
> 
> What I suggested previously was using gfortran for both F77 and F90 as
> later version of GCC just have that. This also will mean the Fortran
> compilers are the same, so they should be "compatible". In order to do
> this, you need to set the following environment variables:
> 
> F77=gfortran
> F90=gfortran
> F77_GETARGDECL=" "
> 
> We will put something in the User Guide about this.


Thanks, we are using debian etch standards:
  gfortran = 4.1.1
  g77      = 3.4


-- 
********************************************************************
*                                                                  *
*  Bas van der Vlies                     e-mail: basv at sara.nl      *
*  SARA - Academic Computing Services    phone:  +31 20 592 8012   *
*  Kruislaan 415                         fax:    +31 20 6683167    *
*  1098 SJ Amsterdam                                               *
*                                                                  *
********************************************************************