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SPARK RM 7.1.4(4) does not mandate anymore that a package with abstract states has a completing body, unless the package state is mentioned in Part_Of specifications. Implement that change. gcc/ada/ * sem_prag.adb (Check_Part_Of_Abstract_State): Add verification related to use of Part_Of, so that constituents in private childs that refer to state in a sibling or parent unit force that unit to have a body. * sem_util.adb (Check_State_Refinements): Drop the requirement to have always a package body for state refinement, when the package state is mentioned in no Part_Of specification. * sem_ch3.adb (Analyze_Declarations): Refresh SPARK refs in comment. * sem_ch7.adb (Analyze_Package_Declaration): Likewise.
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