2.1.0 does not build with clang: error: fields must have a constant size: 'variable length array in structure'  extension will never be supported

Gives the above error with clang 4.0.0.
Builds ok with GCC 7.3.0

- OpenCoarrays Version: 2.1.0
- Fortran Compiler: gfortran 7.3.0
- C compiler used for building lib: clang 4.0.0
- Output of `uname -a`: FreeBSD 11.1-RELEASE-p10
- MPI library being used: mpich 3.1
- Machine architecture and number of physical cores: amd64, 4 cores
- Version of CMake: 3.10.2

```
Script started on Wed Jun  6 08:47:57 2018
Command: make clean all
===>  Cleaning for opencoarrays-2.1.0
===>  License BSD3CLAUSE accepted by the user
===>   opencoarrays-2.1.0 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by opencoarrays-2.1.0 for building
===>  Extracting for opencoarrays-2.1.0
=> SHA256 Checksum OK for sourceryinstitute-OpenCoarrays-2.1.0_GH0.tar.gz.
===>  Patching for opencoarrays-2.1.0
===>   opencoarrays-2.1.0 depends on executable: bash - found
===>   opencoarrays-2.1.0 depends on executable: mpif90 - found
===>   opencoarrays-2.1.0 depends on file: /usr/local/bin/cmake - found
===>   opencoarrays-2.1.0 depends on executable: gfortran7 - found
===>   opencoarrays-2.1.0 depends on file: /usr/local/bin/as - found
===>  Configuring for opencoarrays-2.1.0
===>  Performing out-of-source build
/bin/mkdir -p /usr/ports/lang/opencoarrays/work/.build
-- 
============================================================
   Building OpenCoarrays configuration: Release
============================================================

-- The C compiler identification is Clang 4.0.0
-- The Fortran compiler identification is GNU 7.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working Fortran compiler: /usr/local/bin/gfortran7
-- Check for working Fortran compiler: /usr/local/bin/gfortran7  -- works
-- Detecting Fortran compiler ABI info
-- Detecting Fortran compiler ABI info - done
-- Checking whether /usr/local/bin/gfortran7 supports Fortran 90
-- Checking whether /usr/local/bin/gfortran7 supports Fortran 90 -- yes
-- Building OpenCoarrays version: 2.1.0
-- Performing Test Check_Simple_Coarray_Fortran_Source_Compiles
-- Performing Test Check_Simple_Coarray_Fortran_Source_Compiles - Success
-- Found MPI_C: /usr/local/lib/libmpi.so (found version "3.1") 
-- Found MPI_Fortran: /usr/local/lib/libmpifort.so (found version "3.1") 
-- Found MPI: TRUE (found version "3.1")  
-- MPI runtime and compile time environments appear to be consistent
-- Performing Test MPI_C_COMPILES
-- Performing Test MPI_C_COMPILES - Success
-- Performing Test MPI_Fortran_MODULE_COMPILES
-- Performing Test MPI_Fortran_MODULE_COMPILES - Success
-- Performing Test MPI_Fortran_INCLUDE_COMPILES
-- Performing Test MPI_Fortran_INCLUDE_COMPILES - Success
-- Looking for alloca.h
-- Looking for alloca.h - not found
CMake Warning at src/mpi/CMakeLists.txt:49 (message):
  Could not find <alloca.h>.  Assuming functionality is provided elsewhere.


-- Looking for signal.h
-- Looking for signal.h - found
-- Looking for SIGKILL
-- Looking for SIGKILL - found
-- Looking for include files mpi.h, mpi-ext.h
-- Looking for include files mpi.h, mpi-ext.h - not found
-- Looking for MPIX_ERR_PROC_FAILED
-- Looking for MPIX_ERR_PROC_FAILED - found
-- Looking for MPIX_ERR_REVOKED
-- Looking for MPIX_ERR_REVOKED - found
-- Looking for MPIX_Comm_failure_ack
-- Looking for MPIX_Comm_failure_ack - found
-- Looking for MPIX_Comm_failure_get_acked
-- Looking for MPIX_Comm_failure_get_acked - found
-- Looking for MPIX_Comm_shrink
-- Looking for MPIX_Comm_shrink - found
-- Looking for MPIX_Comm_agree
-- Looking for MPIX_Comm_agree - found
-- Looking for include file mpi.h
-- Looking for include file mpi.h - found
-- Looking for I_MPI_VERSION
-- Looking for I_MPI_VERSION - not found
-- Test allocate_as_barrier_proc is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Allocatable components of coarray derived types only supported in GFortran >= 7 with OpenCoarrays > 1.8.4
-- (but full support not anticipated until OpenCoarrays 2.0 release)
-- Test async_comp_alloc is oversubscribed: 6 CAF images requested with 4 system processor available.
-- Test syncall is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test syncimages is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test syncimages2 is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test duplicate_syncimages is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test syncimages_status is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test sync_ring_abort_np7 is oversubscribed: 7 CAF images requested with 4 system processor available.
-- Test simpleatomics is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test source-alloc-no-sync is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test issue-493-coindex-slice is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test issue-488-multi-dim-cobounds-true is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Test issue-488-multi-dim-cobounds-false is oversubscribed: 8 CAF images requested with 4 system processor available.
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_CXX_COMPILER
    CMAKE_CXX_FLAGS
    CMAKE_CXX_FLAGS_DEBUG
    CMAKE_CXX_FLAGS_RELEASE
    CMAKE_C_FLAGS_DEBUG
    CMAKE_MODULE_LINKER_FLAGS
    THREADS_HAVE_PTHREAD_ARG


-- Build files have been written to: /usr/ports/lang/opencoarrays/work/.build
===>  Building for opencoarrays-2.1.0
/usr/local/bin/cmake -H/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0 -B/usr/ports/lang/opencoarrays/work/.build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/local/bin/cmake -E cmake_progress_start /usr/ports/lang/opencoarrays/work/.build/CMakeFiles /usr/ports/lang/opencoarrays/work/.build/CMakeFiles/progress.marks
/usr/bin/make -f CMakeFiles/Makefile2 all
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
/usr/bin/make -f src/mpi/CMakeFiles/opencoarrays_mod.dir/build.make src/mpi/CMakeFiles/opencoarrays_mod.dir/depend
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
/usr/bin/make -f src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/build.make src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/depend
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/usr/bin/make -f src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/build.make src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/depend
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--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
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--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/depend ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
cd /usr/ports/lang/opencoarrays/work/.build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0 /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/DependInfo.cmake --color=
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
cd /usr/ports/lang/opencoarrays/work/.build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0 /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/mpi /usr/ports/lang/opencoarrays/work/.build /usr/ports/lang/opencoarrays/work/.build/src/mpi /usr/ports/lang/opencoarrays/work/.build/src/mpi/CMakeFiles/opencoarrays_mod.dir/DependInfo.cmake --color=
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
cd /usr/ports/lang/opencoarrays/work/.build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0 /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/DependInfo.cmake --color=
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
Scanning dependencies of target ISO_Fortran_binding_static
/usr/bin/make -f src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/build.make src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/build
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
Scanning dependencies of target ISO_Fortran_binding
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
Scanning dependencies of target opencoarrays_mod
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/ISO_Fortran_binding.c.o ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
/usr/bin/make -f src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/build.make src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/build
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
/usr/bin/make -f src/mpi/CMakeFiles/opencoarrays_mod.dir/build.make src/mpi/CMakeFiles/opencoarrays_mod.dir/requires
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/ISO_Fortran_binding.c.o ---
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/usr/bin/make -f src/mpi/CMakeFiles/opencoarrays_mod.dir/build.make src/mpi/CMakeFiles/opencoarrays_mod.dir/build
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/__/extensions/opencoarrays.F90.o ---
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
[  1%] Building C object src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/ISO_Fortran_binding.c.o
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/bin/cc -DGCC_GE_7 -DHAVE_MPI -DMPI_WORKING_MODULE -DPREFIX_NAME=_gfortran_caf_ -I/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src -I/usr/local/include -O2 -pipe  -fstack-protector -fno-strict-aliasing -O2 -pipe  -fstack-protector -fno-strict-aliasing -o CMakeFiles/ISO_Fortran_binding_static.dir/ISO_Fortran_binding.c.o   -c /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding/ISO_Fortran_binding.c
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
[  2%] Building C object src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/ISO_Fortran_binding.c.o
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/bin/cc -DGCC_GE_7 -DHAVE_MPI -DISO_Fortran_binding_EXPORTS -DMPI_WORKING_MODULE -DPREFIX_NAME=_gfortran_caf_ -I/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src -I/usr/local/include -O2 -pipe  -fstack-protector -fno-strict-aliasing -O2 -pipe  -fstack-protector -fno-strict-aliasing -fPIC -o CMakeFiles/ISO_Fortran_binding.dir/ISO_Fortran_binding.c.o   -c /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding/ISO_Fortran_binding.c
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
[  3%] Building Fortran object src/mpi/CMakeFiles/opencoarrays_mod.dir/__/extensions/opencoarrays.F90.o
cd /usr/ports/lang/opencoarrays/work/.build/src/mpi && /usr/local/bin/gfortran7 -DALLOCA_MISSING -DGCC_GE_7 -DHAVE_MPI -DMPI_WORKING_MODULE -DPREFIX_NAME=_gfortran_caf_ -DUSE_FAILED_IMAGES -I/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src -I/usr/local/include -O -Wl,-rpath=/usr/local/lib/gcc7 -O3 -DNDEBUG -O3 -J../../include/OpenCoarrays-2.1.0_GNU-7 -fPIC -c /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/extensions/opencoarrays.F90 -o CMakeFiles/opencoarrays_mod.dir/__/extensions/opencoarrays.F90.o
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding/ISO_Fortran_binding.c:821:20: warning: comparison of unsigned expression < 0 is always false [-Wtautological-compare]
  if (displacement < 0 || displacement > source->elem_len - 1)
      ~~~~~~~~~~~~ ^ ~
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/iso-fortran-binding/ISO_Fortran_binding.c:821:20: warning: comparison of unsigned expression < 0 is always false [-Wtautological-compare]
  if (displacement < 0 || displacement > source->elem_len - 1)
      ~~~~~~~~~~~~ ^ ~
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_static.dir/all ---
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--- lib/libISO_Fortran_binding.a ---
[  4%] Linking C static library ../../lib/libISO_Fortran_binding.a
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/local/bin/cmake -P CMakeFiles/ISO_Fortran_binding_static.dir/cmake_clean_target.cmake
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/local/bin/cmake -E cmake_link_script CMakeFiles/ISO_Fortran_binding_static.dir/link.txt --verbose=1
/usr/bin/ar qc ../../lib/libISO_Fortran_binding.a  CMakeFiles/ISO_Fortran_binding_static.dir/ISO_Fortran_binding.c.o
/usr/bin/ranlib ../../lib/libISO_Fortran_binding.a
[  4%] Built target ISO_Fortran_binding_static
--- src/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding.dir/all ---
1 warning generated.
--- lib/libISO_Fortran_binding.so.2.1.0 ---
[  5%] Linking C shared library ../../lib/libISO_Fortran_binding.so
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/local/bin/cmake -E cmake_link_script CMakeFiles/ISO_Fortran_binding.dir/link.txt --verbose=1
/usr/bin/cc -fPIC -O2 -pipe  -fstack-protector -fno-strict-aliasing -O2 -pipe  -fstack-protector -fno-strict-aliasing  -Wl,-rpath=/usr/local/lib/gcc7  -L/usr/local/lib/gcc7 -B/usr/local/bin -fstack-protector -shared -Wl,-soname,libISO_Fortran_binding.so.0 -o ../../lib/libISO_Fortran_binding.so.2.1.0 CMakeFiles/ISO_Fortran_binding.dir/ISO_Fortran_binding.c.o 
cd /usr/ports/lang/opencoarrays/work/.build/src/iso-fortran-binding && /usr/local/bin/cmake -E cmake_symlink_library ../../lib/libISO_Fortran_binding.so.2.1.0 ../../lib/libISO_Fortran_binding.so.0 ../../lib/libISO_Fortran_binding.so
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cd /usr/ports/lang/opencoarrays/work/.build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0 /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build /usr/ports/lang/opencoarrays/work/.build/src/tests/unit/iso-fortran-binding /usr/ports/lang/opencoarrays/work/.build/src/tests/unit/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_tests.dir/DependInfo.cmake --color=
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--- src/tests/unit/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_tests.dir/ISO_Fortran_binding_tests.c.o ---
[  6%] Building C object src/tests/unit/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_tests.dir/ISO_Fortran_binding_tests.c.o
cd /usr/ports/lang/opencoarrays/work/.build/src/tests/unit/iso-fortran-binding && /usr/bin/cc -DGCC_GE_7 -DHAVE_MPI -DMPI_WORKING_MODULE -DPREFIX_NAME=_gfortran_caf_ -I/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src -I/usr/local/include -O2 -pipe  -fstack-protector -fno-strict-aliasing -O2 -pipe  -fstack-protector -fno-strict-aliasing -o CMakeFiles/ISO_Fortran_binding_tests.dir/ISO_Fortran_binding_tests.c.o   -c /usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:82:15: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
              CFI_CDESC_T (rank) test1;
              ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:168:15: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
              CFI_CDESC_T (rank) test2;
              ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:310:15: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
              CFI_CDESC_T (rank) test3;
              ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:362:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) test4;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:377:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) test5;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:413:7: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
      CFI_CDESC_T (rank) test6;
      ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:460:11: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
          CFI_CDESC_T (rank) test7;
          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:534:15: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
              CFI_CDESC_T (rank) source;
              ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:623:7: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
      CFI_CDESC_T (rank) test8a, test8b;
      ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:690:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) test9;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:724:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) test10a, test10b;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:783:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) test10c;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:852:11: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
          CFI_CDESC_T (rank) section, source;
          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1015:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) section, source;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1139:7: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
      CFI_CDESC_T (rank) source;
      ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1189:7: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
      CFI_CDESC_T (rank - ctr) section;
      ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1221:11: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
          CFI_CDESC_T (rank - ctr - 1) section2;
          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1265:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) section3, source3;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/ISO_Fortran_binding_tests.c:1292:3: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
  CFI_CDESC_T (rank) foo_c, cx, cy;
  ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:95:24: note: expanded from macro 'CFI_CDESC_T'
#define CFI_CDESC_T(r) CFI_CDESC_TYPE_T (r, void)
                       ^
/usr/ports/lang/opencoarrays/work/OpenCoarrays-2.1.0/src/tests/unit/iso-fortran-binding/../../../iso-fortran-binding/ISO_Fortran_binding.h:93:27: note: expanded from macro 'CFI_CDESC_TYPE_T'
                CFI_dim_t dim[r]; \
                          ^
19 errors generated.
*** [src/tests/unit/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_tests.dir/ISO_Fortran_binding_tests.c.o] Error code 1

make[4]: stopped in /usr/ports/lang/opencoarrays/work/.build
1 error

make[4]: stopped in /usr/ports/lang/opencoarrays/work/.build
*** [src/tests/unit/iso-fortran-binding/CMakeFiles/ISO_Fortran_binding_tests.dir/all] Error code 2

make[3]: stopped in /usr/ports/lang/opencoarrays/work/.build
--- src/mpi/CMakeFiles/opencoarrays_mod.dir/all ---
A failure has been detected in another branch of the parallel make

make[4]: stopped in /usr/ports/lang/opencoarrays/work/.build
*** [src/mpi/CMakeFiles/opencoarrays_mod.dir/all] Error code 2

make[3]: stopped in /usr/ports/lang/opencoarrays/work/.build
2 errors

make[3]: stopped in /usr/ports/lang/opencoarrays/work/.build
*** [all] Error code 2

make[2]: stopped in /usr/ports/lang/opencoarrays/work/.build
1 error

make[2]: stopped in /usr/ports/lang/opencoarrays/work/.build
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make[1]: stopped in /usr/ports/lang/opencoarrays
*** Error code 1

Stop.
make: stopped in /usr/ports/lang/opencoarrays

Command exit status: 1
Script done on Wed Jun  6 08:48:01 2018
```


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2.1.0 does not build with clang: error: fields must have a constant size: 'variable length array in structure' extension will never be supported #554

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Uh oh!

2.1.0 does not build with clang: error: fields must have a constant size: 'variable length array in structure' extension will never be supported #554

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