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For Implicit_Packing, do not require the Size clause to exactly match the packed size. For example, an array of 7 Booleans will fit in 7 bits if packed, or 7*8=56 bits if not packed. This patch allows "for T'Size use 8;" to force packing in Implicit_Packing mode; previously, the compiler ignored Implicit_Packing unless it was exactly "use 7". Apparently, customers have that sort of code, and the whole point of Implicit_Packing is to allow such legacy code to work. We already do the right thing for records, at least in cases tested. We deliberately avoid changing the error messages given here. They could possibly use some work, but there are subtle interactions with the messages given in Sem_Ch13 for the same thing. gcc/ada/ChangeLog: * freeze.adb (Freeze_Entity): Change "=" to ">=" in size comparison for Implicit_Packing mode. Keep it as "=" for giving error messages. * opt.ads (Implicit_Packing): Minor: correct obsolete comment.
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