@zbeekman zbeekman released this Aug 10, 2018

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Notable Changes

Officially supported versions of GFortran are now 7.x and 8.2+

A number of compiler side issues were present in GFortran 8.1. Now that 8.2
has been released we are deprecating support for GFortran 6.x and earlier.
Officially supported versions of GCC/GFortran are 7.x and 8.2+. We anticipate
6.x will continue to mostly work for some time, however, we will be phasing
out support for GFortran 6 over time.

ISO_Fortran_binding and C portability issues in the last release (2.1.0)

  • ISO_Fortran_binding (included in the last release) included some C code that
    was not portable. It now must be asked for explicitly by passing
    -DCAF_ENABLE_ISO_Fortran_BINDING:BOOL=ON when configuring with CMake.
    (If OPENCOARRAYS_DEVELOPER is set in the user's environment it will also
    default to turning on the build of ISO_Fortran_BINDING.)
  • ISO_Fortran_binding has not been stripped out of OpenCoarrays, but it's use
    via OpenCoarrays is now deprecated and un-maintained; it will be stripped
    out at a later date.
  • ISO_Fortran_binding has become its own package and is available from:

Bug Fixes

  • Fixed #554: Allow building with clang, ensure no VLAs by default
    (ISO_Fortran_binding related)
  • Fixed #538/#415: allocate_as_barrier_proc now passes consistently with
    GFortran7.4 and 8.2
  • Fixed #515: Reallocate LHS issue when RHS is a coarray (off-by-one error)
  • Fixed #563: Install.sh now sets user environment script to:
    • use DYLD_LIBRARY_PATH not LD_LIBRARY_PATH when on macOS and custom
      GFortran was installed
    • cleanup CMake PATH & prevent redundant modification of PATH
  • Numerical instability in co_heat test fixed and pass condition made more
  • Fixed #552: Checks for memory reallocation were incorrectly triggered by a
    singleton on 1st dim when referencing a coarray (delta == 1) in a derived
  • Fixed #550: Conflicting types in the ISO_Fortran_binding tests
  • CFI_SUCCESS value is now zero, consistent with the Fortran 2018 standard


  • #565: cafrun now accepts -show in addition to -s and --show to mimic
    MPI wrappers. This now allows support from TAU Commander
  • #520: When backed by OpenMPI, users may run entire configure, build, install
    and check process as root, but OpenMPI doesn't like to execute programs as root
    without an additional flag. Add --allow-run-as-root when running tests and
    using OpenMPI


Please see the installation instructions for more details on how to build and install this version of OpenCoarrays

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