build: Support yaml-cpp 0.8+

Beginning from version 0.8.0 the exported target has been renamed to `yaml-cpp::yaml-cpp`.
To support also older versions choose the correct target name stored in a CMake variable.

(cherry-picked from commit 2af719f)

CMakeLists.txt

@@ -271,6 +271,17 @@ if(    yaml-cpp_FOUND
     INTERFACE_INCLUDE_DIRECTORIES "${YAML_CPP_INCLUDE_DIR}"
   )
 endif()
+# Workaround to fix a problem with the imported target name
+# The target name includes the namespace yaml-cpp begining
+# from version 0.8.0. So the new exported target is now
+# yaml-cpp::yaml-cpp.
+if(yaml-cpp_FOUND)
+  if(TARGET yaml-cpp::yaml-cpp)
+    set(YAMLCPPLIB yaml-cpp::yaml-cpp)
+  else()
+    set(YAMLCPPLIB yaml-cpp)
+  endif()
+endif()
 
 configure_file(${CMAKE_SOURCE_DIR}/cmake/scripts/FairRootConfigVersion.cmake.in "${CMAKE_BINARY_DIR}/FairRootConfigVersion.cmake" @ONLY)
 

fairtools/MCConfigurator/CMakeLists.txt

@@ -37,7 +37,7 @@ target_link_libraries(${target} PUBLIC
 
   geant321
   geant4vmc
-  yaml-cpp
+  ${YAMLCPPLIB}
 
   Core
   ${VMCLIB}