Unable to complete build.sh on CentOs with gfortran 4.4.7

[pirpyn]

Hi, first thanks for sharing your code.

Running build.sh gives the following error :

Compiling src/slsqp_kinds.f90 serially
src/slsqp_kinds.f90:10.44:

    use, intrinsic :: iso_fortran_env, only: real64
                                            1
Error: Symbol 'real64' referenced at (1) does not exist in intrinsic module ISO_FORTRAN_ENV

Which version of gfortran is required ? I have 4.4.7, cannot upgrade : company computer.

Full output: build.log

[jacobwilliams]

It looks like this particular feature (real64) was added to gfortran in 4.5. Probably you need to use one even newer (6 or 7). Older releases were very incomplete and buggy for modern Fortran features.