added config features file, added Fortran as compiler to CMake

CMakeLists.txt

 cmake_minimum_required( VERSION 3.30 FATAL_ERROR )
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-project( cdo VERSION 2.4.0 LANGUAGES C CXX )
+project( cdo VERSION 2.4.0 LANGUAGES C CXX Fortran)
 
 # --- Additional functionalities for CMake
 include(CTest)
@@ -17,6 +17,10 @@ configure_file (
   "${PROJECT_SOURCE_DIR}/cmake/cdo_config.h.in"
   "${PROJECT_BINARY_DIR}/src/config.h"
 )
+configure_file (
+  "${PROJECT_SOURCE_DIR}/cmake/cdo_config_features.h.in"
+  "${PROJECT_BINARY_DIR}/src/cdo_config_features.h"
+)
 # --- Other compile definitions currently required TEMP 
 list(APPEND cdo_compile_definitions 
   restrict= 

cmake/cdo_config_features.h.in

+#ifndef CDO_CONFIG_FEATURES_H
+#define CDO_CONFIG_FEATURES_H
+
+#include <string_view>
+
+/* clang-format off */
+constexpr std::string_view CDO          = "@PROJECT_NAME@";
+constexpr std::string_view CXX_VERSION  = "@CMAKE_CXX_COMPILER_VERSION@"l
+constexpr std::string_view CXX_COMPILER = "@CMAKE_CXX_COMPILER_ID@";
+constexpr std::string_view C_VERSION    = "@CMAKE_C_COMPILER_VERSION@";
+constexpr std::string_view C_COMPILER   = "@CMAKE_C_COMPILER_ID@";
+constexpr std::string_view F77_COMPILER = "@CMAKE_Fortran_COMPILER_ID@";
+constexpr std::string_view F77_VERSION  = "@CMAKE_Fortran_COMPILER_VERSION@";
+/* clang-format on */
+
+#endif