GNAT Modified General Public License（简称：Modified GPL、GMGPL、MGPL）是一种软件许可方式，它是原有GNU通用公共许可证（简称：GPL）许可方式的一种特别修订版，是针对Ada编程语言的类属特性而修订，其修订的内容主要如下：
As a special exception, if other files instantiate generics from this unit, or you link this unit with other files to produce an executable, this unit does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU Public License.
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