FindCLP: if neither coinutils nor clp are installed, do not error out

finders/FindCLP.cmake

@@ -4,9 +4,11 @@
 if(NOT TARGET Coin::CLP)
 
 if(NOT TARGET Coin::CoinUtils)
-    find_package(CoinUtils REQUIRED)
+    find_package(CoinUtils QUIET)
 endif()
-
+if(NOT TARGET Coin::CoinUtils)
+    message("FindCLP: Did not find dependency CoinUtils.")
+else()
     find_path(CLP_INCLUDE_DIR
           NAMES ClpConfig.h
           PATHS "$ENV{CLP_DIR}/include/coin"
@@ -48,7 +50,7 @@ if(CLP_FOUND)
         target_include_directories(Coin::CLP INTERFACE ${CLP_INCLUDE_DIR})
         target_link_libraries(Coin::CLP INTERFACE Coin::CoinUtils)
     endif()
-
+endif()
 
 mark_as_advanced(CLP_INCLUDE_DIR CLP_LIBRARY)
 endif(NOT TARGET Coin::CLP)