Enable Fortran interface for 32-bit sunindextype

cmake/SundialsBuildOptionsPre.cmake

@@ -185,11 +185,6 @@ if(BUILD_FORTRAN_MODULE_INTERFACE)
     print_error("F2003 interface is not compatible with ${SUNDIALS_PRECISION} precision")
   endif()
 
-  # F2003 interface only supports 64-bit indices
-  if(NOT (SUNDIALS_INDEX_SIZE MATCHES "64"))
-    print_error("F2003 interface is not compatible with ${SUNDIALS_INDEX_SIZE}-bit indicies")
-  endif()
-
   # Allow a user to set where the Fortran modules will be installed
   set(DOCSTR "Directory where Fortran module files are installed")
   sundials_option(Fortran_INSTALL_MODDIR STRING "${DOCSTR}" "fortran")

cmake/macros/SundialsAddLibrary.cmake

@@ -451,6 +451,7 @@ macro(sundials_add_f2003_library target)
       ${sundials_add_f2003_library_INCLUDE_DIRECTORIES}
       ${_includes}
     COMPILE_DEFINITIONS ${sundials_add_f2003_library_COMPILE_DEFINITIONS}
+                        PUBLIC "SUNDIALS_INT${SUNDIALS_INDEX_SIZE}_T"
     COMPILE_OPTIONS ${sundials_add_f2003_library_COMPILE_OPTIONS}
     PROPERTIES ${sundials_add_f2003_library_PROPERTIES} ${_properties}
     OUTPUT_NAME ${sundials_add_f2003_library_OUTPUT_NAME}

doc/shared/sundials/Fortran.rst

@@ -175,8 +175,13 @@ equivalencies with the parameter direction in mind.
 .. warning::
 
    Currently, the Fortran 2003 interfaces are only compatible with SUNDIALS
-   builds where the ``sunrealtype`` is double-precision the ``sunindextype`` size
-   is 64-bits.
+   builds where the ``sunrealtype`` is double-precision.
+
+.. versionchanged:: x.y.z
+
+   The Fortran interfaces can now be built with 32-bit ``sunindextype`` in
+   addition to 64-bit ``sunindextype``.
+
 
 .. _SUNDIALS.Fortran.DataTypes.Table:
 .. table:: C/Fortran-2003 Equivalent Types

doc/superbuild/source/developers/releases/Checklist.rst

@@ -73,6 +73,7 @@ web pages.
    that they are deprecated).
 
 #. Regenerate the Fortran 2003 interfaces. It is possible nothing will be updated.
+   This is done by running ``make all32 all64`` in the ``swig/`` directory.
 
 #. Update the "Changes in ..." sections in all user guides. The changes should be
    sorted so that major new features are above bug fixes.

src/arkode/CMakeLists.txt

@@ -104,7 +104,7 @@ message(STATUS "Added ARKODE module")
 
 # Add F2003 module if the interface is enabled
 if(BUILD_FORTRAN_MODULE_INTERFACE)
-  add_subdirectory(fmod)
+  add_subdirectory("fmod_int${SUNDIALS_INDEX_SIZE}")
 endif()
 
 # Add ARKODE XBraid interface