Changing fpDebug to old and well-known gdb

This article intends to replace fpDebug, Lazarus' default debugger, with the well-known gdb. It is worth remembering that gdb was replaced by fpDebuger because fpDebuger was created especially to debug freepascal programs, while gdb is a component designed to be used with multiple purposes in multiple programming languages and for this reason it is a bit cumbersome and slow. Using fpDebug is the best option, however there are times when we need to debug using gdb to see if the behavior of fpDebug is correct.

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