First step fixing #774.

This is the first step of fixing #774. As long as programs only
use get from a remote image they already should work fine with
a most recent gfortran compiler.

Author: vehre

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})
@@ -858,6 +861,7 @@ 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 +262,23 @@ 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 **, int32_t *, void *,
+                                                void *, size_t *, size_t *));
+
+void PREFIX(register_accessors_finish)();
+
+int PREFIX(get_remote_function_index)(const int hash);
+
+void PREFIX(get_by_ct)(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);
+#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,