Fix regression in exporting required dependency components

Regression introduced with 0ff8eaf

cmake/FairMQLib.cmake

@@ -300,7 +300,6 @@ macro(find_package2 qualifier pkgname)
   set(old_CPP ${CMAKE_PREFIX_PATH})
   set(CMAKE_PREFIX_PATH ${${pkgname_upper}_ROOT} $ENV{${pkgname_upper}_ROOT} ${CMAKE_PREFIX_PATH})
   unset(__version__)
-  unset(__components__)
   if(ARGS_VERSION)
     list(GET ARGS_VERSION 0 __version__)
     list(LENGTH ARGS_VERSION __length__)
@@ -322,22 +321,21 @@ macro(find_package2 qualifier pkgname)
   if(${pkgname}_FOUND)
     if(${qualifier} STREQUAL PRIVATE)
       set(PROJECT_${pkgname}_VERSION ${__version__})
-      set(PROJECT_${pkgname}_COMPONENTS ${__components__})
+      set(PROJECT_${pkgname}_COMPONENTS ${ARGS_COMPONENTS})
       set(PROJECT_PACKAGE_DEPENDENCIES ${PROJECT_PACKAGE_DEPENDENCIES} ${pkgname})
     elseif(${qualifier} STREQUAL PUBLIC)
       set(PROJECT_${pkgname}_VERSION ${__version__})
-      set(PROJECT_${pkgname}_COMPONENTS ${__components__})
+      set(PROJECT_${pkgname}_COMPONENTS ${ARGS_COMPONENTS})
       set(PROJECT_PACKAGE_DEPENDENCIES ${PROJECT_PACKAGE_DEPENDENCIES} ${pkgname})
       set(PROJECT_INTERFACE_${pkgname}_VERSION ${__version__})
-      set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${__components__})
+      set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${ARGS_COMPONENTS})
       set(PROJECT_INTERFACE_PACKAGE_DEPENDENCIES ${PROJECT_INTERFACE_PACKAGE_DEPENDENCIES} ${pkgname})
     elseif(${qualifier} STREQUAL INTERFACE)
       set(PROJECT_INTERFACE_${pkgname}_VERSION ${__version__})
-      set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${__components__})
+      set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${ARGS_COMPONENTS})
       set(PROJECT_INTERFACE_PACKAGE_DEPENDENCIES ${PROJECT_INTERFACE_PACKAGE_DEPENDENCIES} ${pkgname})
     endif()
   endif()
 
-  unset(__components__)
   unset(__version__)
 endmacro()