Migrate to gfortran-15 ABI for accessing data in non-coarray aware codes.

CMakeLists.txt

@@ -233,6 +233,9 @@ endif()
   if ( gfortran_compiler AND ( NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 8.0.0 ) )
     add_definitions(-DGCC_GE_8) # Tell library to build against GFortran 8.x bindings w/ descriptor change
   endif()
+  if ( gfortran_compiler AND ( NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 14.0.0 ) )
+    add_definitions(-DGCC_GE_15) # Tell library to build against GFortran 15.x bindings
+  endif()
 
 if(gfortran_compiler)
   set(OLD_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
@@ -661,7 +664,10 @@ define_property(TARGET
 # Add global openmpi property, because using a variable an setting in parent scope did
 # not work as expected, i.e., not at all, on Linux Fedora 39.
 #-------------------------------------------------------------------------------------
-define_property(GLOBAL PROPERTY openmpi BRIEF_DOCS "True when mpi is openMPI.")
+define_property(GLOBAL
+  PROPERTY openmpi
+  BRIEF_DOCS "True when mpi is openMPI."
+  FULL_DOCS "Set internally when the mpi library to use is openmpi.")
 
 #-------------------------------
 # Recurse into the src directory
@@ -807,6 +813,7 @@ if(opencoarrays_aware_compiler)
       add_caf_test(teams_coarray_sendget 5 teams_coarray_sendget)
       add_caf_test(sync_team 8 sync_team)
       add_caf_test(alloc_comp_multidim_shape 2 alloc_comp_multidim_shape)
+      set_tests_properties(alloc_comp_multidim_shape PROPERTIES TIMEOUT 300)
     endif()
   endif()
 
@@ -858,6 +865,7 @@ if(opencoarrays_aware_compiler)
 
   # Pure sendget tests
   add_caf_test(strided_sendget 3 strided_sendget)
+  add_caf_test(get_with_1d_vector_index 3 get_with_1d_vector_index)
   add_caf_test(get_with_vector_index 4 get_with_vector_index)
 
   # Collective subroutine tests

src/application-binary-interface/libcaf.h

@@ -30,6 +30,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  */
 
 #include <stdbool.h>
 #include <stddef.h> /* For size_t.  */
+#include <stdint.h>
 
 #include "libcaf-gfortran-descriptor.h"
 #include "libcaf-version-def.h"
@@ -261,6 +262,49 @@ void PREFIX(caf_sendget)(caf_token_t, size_t, int, gfc_descriptor_t *,
                          gfc_descriptor_t *, caf_vector_t *, int, int, bool,
                          int *);
 
+#ifdef GCC_GE_15
+void PREFIX(register_accessor)(const int hash,
+                               void (*accessor)(void *, const int *, void **,
+                                                int32_t *, void *, caf_token_t,
+                                                const size_t, size_t *,
+                                                const size_t *));
+
+void PREFIX(register_accessors_finish)();
+
+int PREFIX(get_remote_function_index)(const int hash);
+
+void PREFIX(get_from_remote)(
+    caf_token_t token, const gfc_descriptor_t *opt_src_desc,
+    const size_t *opt_src_charlen, const int image_index, const size_t dst_size,
+    void **dst_data, size_t *opt_dst_charlen, gfc_descriptor_t *opt_dst_desc,
+    const bool may_realloc_dst, const int getter_index, void *get_data,
+    const size_t get_data_size, int *stat, caf_team_t *team, int *team_number);
+
+int32_t PREFIX(is_present_on_remote)(caf_token_t token, const int image_index,
+                                     const int is_present_index, void *add_data,
+                                     const size_t add_data_size);
+
+void PREFIX(send_to_remote)(caf_token_t token, gfc_descriptor_t *opt_dst_desc,
+                            const size_t *opt_dst_charlen,
+                            const int image_index, const size_t src_size,
+                            const void *src_data, size_t *opt_src_charlen,
+                            const gfc_descriptor_t *opt_src_desc,
+                            const int setter_index, void *add_data,
+                            const size_t add_data_size, int *stat,
+                            caf_team_t *team, int *team_number);
+
+void PREFIX(transfer_between_remotes)(
+    caf_token_t dst_token, gfc_descriptor_t *opt_dst_desc,
+    size_t *opt_dst_charlen, const int dst_image_index,
+    const int dst_access_index, void *dst_add_data,
+    const size_t dst_add_data_size, caf_token_t src_token,
+    const gfc_descriptor_t *opt_src_desc, const size_t *opt_src_charlen,
+    const int src_image_index, const int src_access_index, void *src_add_data,
+    const size_t src_add_data_size, const size_t src_size,
+    const bool scalar_transfer, int *dst_stat, int *src_stat,
+    caf_team_t *dst_team, int *dst_team_number, caf_team_t *src_team,
+    int *src_team_number);
+#endif
 #ifdef GCC_GE_8
 void PREFIX(get_by_ref)(caf_token_t, int, gfc_descriptor_t *dst,
                         caf_reference_t *refs, int dst_kind, int src_kind,

src/runtime-libraries/mpi/CMakeLists.txt

@@ -146,6 +146,11 @@ set(HOST_NAME ${HOST_NAME} PARENT_SCOPE)
 execute_process(COMMAND ${MPIEXEC_EXECUTABLE} --version
   OUTPUT_VARIABLE mpi_version_out)
 if (mpi_version_out MATCHES "[Oo]pen[ -][Mm][Pp][Ii]")
+  if ( gfortran_compiler AND ( NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 14.0.0 ) )
+    # OpenMPI uses addresses for windows instead of identical ids on all images for the same token.
+    # Therefore we can't use it (yet; and probably never).
+    message( FATAL_ERROR "OpenMPI is incompatible with gfortran's coarray implementation from gfortran version 15 on. Please use a different MPI implementation!")
+  endif ()
   message( STATUS "OpenMPI detected")
   set_property(GLOBAL PROPERTY openmpi true)
   # Write out a host file because OMPI's mpiexec is dumb