CMake: Add proper support for optional linking to netcdf and eccodes

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)

tests/CMakeLists.txt

@@ -31,7 +31,7 @@ list(APPEND test_lib_src
 
 add_library(test_lib ${test_lib_src})
 target_include_directories(test_lib PRIVATE ../src/)
-target_link_libraries(test_lib PRIVATE cdilib eccodes)
+target_link_libraries(test_lib PRIVATE cdilib ${eccodes_LIBRARIES})
 
 foreach(target ${current_targets})
   target_include_directories(${target} PRIVATE ../src/)