* fe.h (Set_Identifier_Casing): Add const to second parameter.
	* gcc-interface/misc.c (internal_error_function): Make copy of retur
	from pp_formatted_text before assigning BUFFER to it.
	(gnat_init): Likewise for main_input_filename and gnat_argv.
	(gnat_printable_name): Remove cast from call to Set_Identifier_Casing.

Co-Authored-By: Thomas Quinot <quinot@adacore.com>

From-SVN: r146678