[MITgcm-devel] problems with sp4 opt file

[Martin Losch]

Hallo Ed,

I tried to adopt the sp4+mpi optfile to work on our IBM and I ran into 
the problem that almost all test for system libraries fail:
> ===  Checking system libraries  ===
>   Do we have the system() command using mpxlf95_r -q64...  yes
>   Do we have the fdate() command using mpxlf95_r -q64...  no
>   Do we have the etime() command using mpxlf95_r -q64...  no
>   Can we call simple C routines (here, "cloc()") using mpxlf95_r 
> -q64...  no
>   Can we unlimit the stack size using mpxlf95_r -q64...  no
>   Can we use stat() through C calls...  no
>   Can we create NetCDF-enabled binaries...  yes
The first three are fine and correct (they do not try to run the 
executable), but the next three fail because of the followingvi  error 
(when they are run after successful compilation):
ERROR: 0031-808  Hostfile or pool must be used to request nodes
because apparently an exectuable generated with mpxlf95 requires to be 
run in an mpi environment, which is not done within genmake2. the 
netcdf test passes, because the executable is not run (as in the case 
for the first three test).

So there is an inconsistency there, isn't it? Some of the test require 
running the test-executable (test for cloc, unlimit stack size, and 
stat) and some don't (netcdf, system, fdate, etime). Regardless of how 
important or unimportant the passing of any of the tests is, the 
testing procedure itself fails if one compiles with MPI. Is it really 
necessary to try to run the executables? Or is it enough to check 
whether the compilation and link-step is successful (as in the case of 
netcdf)?

Martin