lang.opt (funsigned-char): New option.

	* gcc-interface/lang.opt (funsigned-char): New option.
	* gcc-interface/misc.c (gnat_handle_option): Accept it.
	* gcc-interface/utils.c (finish_character_type): Tweak comment.

From-SVN: r262629

gcc/ada/ChangeLog

+2018-07-13  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc-interface/lang.opt (funsigned-char): New option.
+	* gcc-interface/misc.c (gnat_handle_option): Accept it.
+	* gcc-interface/utils.c (finish_character_type): Tweak comment.
+
 2018-07-07  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/decl.c (gnat_to_gnu_entity): Add GNAT_DECL local
@@ -2351,7 +2357,7 @@
 2018-05-21  Jerome Lambourg  <lambourg@adacore.com>
 
 	* gcc-interface/Makefile.in: Add g-soliop__qnx.ads to the runtime build
-	for QNX.
+	for QNX.
 
 2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>
 

gcc/ada/gcc-interface/lang.opt

@@ -80,6 +80,10 @@ fsigned-char
 Ada AdaWhy AdaSCIL
 Make \"char\" signed by default.
 
+funsigned-char
+Ada AdaWhy AdaSCIL
+Make \"char\" unsigned by default.
+
 gant
 Ada AdaWhy AdaSCIL Driver Joined Undocumented RejectNegative
 Catch typos.

gcc/ada/gcc-interface/misc.c

@@ -170,6 +170,7 @@ gnat_handle_option (size_t scode, const char *arg, int value, int kind,
 
     case OPT_fshort_enums:
     case OPT_fsigned_char:
+    case OPT_funsigned_char:
       /* These are handled by the middle-end.  */
       break;
 

gcc/ada/gcc-interface/utils.c

@@ -1684,7 +1684,7 @@ record_builtin_type (const char *name, tree type, bool artificial_p)
   integral types are unsigned.
 
   Unfortunately the signedness of 'char' in C is implementation-defined
-  and GCC even has the option -fsigned-char to toggle it at run time.
+  and GCC even has the option -f{un}signed-char to toggle it at run time.
   Since GNAT's philosophy is to be compatible with C by default, to wit
   Interfaces.C.char is defined as a mere copy of Character, we may need
   to declare character types as signed types in GENERIC and generate the