CMake: Improvements from kitware

• Add multiple CMake option to control which parts of CDI should be built
• Add installation of the cdilib and associated CMake config file
• Fix some issues with linking
• Fix some issues in cdi-config.cmake

src/CMakeLists.txt

@@ -196,7 +196,7 @@ add_library(cdilib
 )
 
 target_include_directories(cdilib PRIVATE "${PROJECT_BINARY_DIR}/src/config.h")
-target_link_libraries(cdilib eccodes netCDF::netcdf)
+target_link_libraries(cdilib ${eccodes_LIBRARIES} ${netCDF_LIBRARIES})
 target_compile_definitions(cdilib PRIVATE PACKAGE_NAME="${PROJECT_NAME}" VERSION="${CMAKE_PROJECT_VERSION}" ${cdi_compile_defs})
 
 add_library(cdilib::cdilib ALIAS cdilib)