Satish, We get too many mails like this, it wastes our time and their time. In config/configure.py please add checks if the machine is a cray that the user did not provide an MPI dir, and that the user did pass in '--with-clib-autodetect=0', '--with-cxxlib-autodetect=0', '--with-fortranlib-autodetect=0', and any other mandatory things and error out with a very useful error message telling them what options to use and not to use. Barry It is absurd to think that somehow Cray users will magically know to use the auto detect = 0 flag and not provide an MPI dir etc.

Begin forwarded message:

From: Phani Motamarri <[email protected]> Subject: [petsc-maint] Petsc configure Error on Edison on NERSC Date: September 20, 2015 at 3:39:22 PM CDT To: petsc-maint <[email protected]>

Hi,

I am trying to compile PETSc on Edison one of the NERSC clusters. However I get the following configure error "C libraries cannot directly be used from Fortran".

I am wondering if I am missing anything. I attaching configure.log with this email.

Regards Phani