Implement units in tasking directory for Windows
Insert a test of indexed entries into examples/tasking6.adb
Improve Ada.Text_IO.Col, Line, Line_Length and Page_Length writing the escape-sequence(s) directly
Retry ACATS
Remove System.Soft_Links.Nop
Implement protected entry
Retry ACATS
Implement synchronized interface
Implement Unbounded_Synchronized_Queues and Unbounded_Priority_Queues
Add and fix some entities for tasking required by compiler
Use O_CLOEXEC if it's available, instead of setting FD_CLOEXEC after open
Fix read-write locking in Windows
Fix to eliminate zero-terminators from exception names, again
Fix examples/image.adb
Add source/fix-fcntl.h to define missing O_EXLOCK, O_SHLOCK and O_CLOEXEC as 0, and remove implementation unit System.File_Control
Make new directory nls, and add platform-depended text encoding as System.Native_Encoding
Add overloaded System.Native_Encoding.Convert and improve System.Native_Encoding.Generic_String
Reorder
Remark
Change substitutes of System.Native_Encoding