On 05/18/2016 02:04 PM, ehsan esfahani wrote:

$ gfortran --version
GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
Copyright (C) 2015 Free Software Foundation, Inc.
  this was the result.

This is often not enough. In order to make the compiler work, it also needs to be able to actually *compile* a fortran file (which requires the fc1 executable, I believe) and to execute the code (which requires the fortran runtime libraries). Either of these may be missing in your installation.

When p4est tests whether the compiler is usable, it will write the error message to a file called config.log in the p4est build directory. You'll need to look into this file to find out about the cause why it thinks that the F77 compiler isn't usable.

Best
 W.

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Wolfgang Bangerth               email:            [email protected]
                                www: http://www.math.tamu.edu/~bangerth/

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