exp_ch2.adb (Expand_Current_Value): Make an appropriate character literal if the entity is of a character type.
* exp_ch2.adb (Expand_Current_Value): Make an appropriate character
literal if the entity is of a character type.
* gcc-interface/lang.opt (fsigned-char): New option.
* gcc-interface/misc.c (gnat_handle_option): Accept it.
(gnat_init): Adjust comment.
* gcc-interface/gigi.h (finish_character_type): New prototype.
(maybe_character_type): New inline function.
(maybe_character_value): Likewise.
* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Enumeration_Type>: For
a character of CHAR_TYPE_SIZE, make a signed type if flag_signed_char.
Set TYPE_ARTIFICIAL early and call finish_character_type on the type.
<E_Enumeration_Subtype>: For a subtype of character with RM_Size and
Esize equal to CHAR_TYPE_SIZE, make a signed type if flag_signed_char.
Copy TYPE_STRING_FLAG from type to subtype.
<E_Array_Type>: Deal with character index types.
<E_Array_Subtype>: Likewise.
* gcc-interface/trans.c (gigi): Replace unsigned_char_type_node with
char_type_node throughout.
(build_raise_check): Likewise.
(get_type_length): Deal with character types.
(Attribute_to_gnu) <Attr_Pos>: Likewise. Remove obsolete range check
code. Minor tweak.
<Attr_Pred>: Likewise.
(Loop_Statement_to_gnu): Likewise.
(Raise_Error_to_gnu): Likewise.
<N_Indexed_Component>: Deal with character index types. Remove
obsolete code.
<N_Slice>: Likewise.
<N_Type_Conversion>: Deal with character types. Minor tweak.
<N_Unchecked_Type_Conversion>: Likewise.
<N_In>: Likewise.
<N_Op_Eq>: Likewise.
(emit_index_check): Delete.
* gcc-interface/utils.c (finish_character_type): New function.
(gnat_signed_or_unsigned_type_for): Deal with built-in character types.
* gcc-interface/utils2.c (expand_sloc): Replace unsigned_char_type_node
with char_type_node.
(build_call_raise): Likewise.
(build_call_raise_column): Likewise.
(build_call_raise_range): Likewise.