Ada Source Character Set (Debugging with GDB)

The GNAT compiler supports a number of character sets for source files. See (gnat_ugn)Character Set Control. GDB includes support for this as well.

set ada source-charset charset: Set the source character set for Ada. The character set must be supported by GNAT. Because this setting affects the decoding of symbols coming from the debug information in your program, the setting should be set as early as possible. The default is ISO-8859-1, because that is also GNAT’s default.
show ada source-charset: Show the current source character set for Ada.