Fixed cross build for QNX

CMakeLists.txt

@@ -147,22 +147,23 @@ if (ECAL_THIRDPARTY_BUILD_PROTOBUF)
     )
   endif()
 
-  if (NOT TARGET protoc_imported AND CMAKE_CROSSCOMPILING)
+  if (NOT TARGET protoc AND CMAKE_CROSSCOMPILING)
     # In cross compile scenario, we don't build protoc, so we need
     # to find and import it so downstream usage will use the host compiler.
 
     # find_program will search the host paths if CMAKE_FIND_ROOT_PATH_MODE_PROGRAM 
     # is configured correctly (see toolchain file)
     find_program(protoc_path NAMES protoc REQUIRED)
-    add_executable(protoc_imported IMPORTED)
-    set_target_properties(protoc_imported PROPERTIES IMPORTED_LOCATION ${protoc_path})
-    set_target_properties(protoc_imported PROPERTIES IMPORTED_GLOBAL TRUE)
+    add_executable(protoc IMPORTED)
+    set_target_properties(protoc PROPERTIES IMPORTED_LOCATION ${protoc_path})
+    set_target_properties(protoc PROPERTIES IMPORTED_GLOBAL TRUE)
 
-    add_executable(protobuf::protoc ALIAS protoc_imported)
-    set(Protobuf_PROTOC_EXECUTABLE protoc_imported)
+    add_executable(protobuf::protoc ALIAS protoc)
+
+    message(STATUS "protoc has been automatically imported from ${protoc_path} for crosscompiling.")
+
   elseif(NOT TARGET protobuf::protoc)
     add_executable(protobuf::protoc ALIAS protoc)
-    set(Protobuf_PROTOC_EXECUTABLE protoc)
   endif()
 
   get_target_property(is_imported protoc IMPORTED)
@@ -174,6 +175,7 @@ if (ECAL_THIRDPARTY_BUILD_PROTOBUF)
     )
   endif()
 
+  set(Protobuf_PROTOC_EXECUTABLE protoc)
   set(Protobuf_VERSION 3.11.4)
 endif()