[RFA] defs.h: Define GDB_DEFAULT_TARGET_[WIDE_]CHARSET for Cygwin and MingW builds

[Corinna Vinschen <vinschen@redhat.com>]

Hi,

today I tested the wide char printing in GDB for the furst time on a
Cygwin build and it didn't work well.  The reson was that the default
for GDB_DEFAULT_TARGET_WIDE_CHARSET is UTF-32, which is bad for a system
defining wchar_t to be UTF-16.  That's Windows for you.

So I applied the below patch, which makes GDB for Cygwin happy.  I also
set the GDB_DEFAULT_TARGET_CHARSET for Cygwin and Win32 to a more sane
default for both systems.


Ok to apply?


Thanks,
Corinna


	* defs.h (GDB_DEFAULT_TARGET_WIDE_CHARSET): Define as UTF-16 for
	Windows-based systems.
	(GDB_DEFAULT_TARGET_CHARSET): Set to UTF-8 for Cygwin and CP1252
	for other Windows-based systems.


Index: defs.h
===================================================================
RCS file: /cvs/src/src/gdb/defs.h,v
retrieving revision 1.265
diff -u -p -r1.265 defs.h
--- defs.h	25 Feb 2010 20:30:58 -0000	1.265
+++ defs.h	28 Feb 2010 13:04:26 -0000
@@ -1192,6 +1192,22 @@ extern int use_windows;
 #define ISATTY(FP)	(isatty (fileno (FP)))
 #endif
 
+/* The default wide character charset is UTF-32, which is wrong for
+   Windows-based systems which use UTF-16. */
+#if defined (__CYGWIN__) || defined (_WIN32)
+#define GDB_DEFAULT_TARGET_WIDE_CHARSET "UTF-16"
+#endif
+
+/* The default output charset for Cygwin is UTF-8.  The default output
+   charset for Win32 is the default ANSI codepage of the system, which
+   depends on the localization of the underlying Windows system.  However,
+   CP1252 is a good default replacement for ISO-8859-1 at least. */
+#if defined (__CYGWIN__)
+#define GDB_DEFAULT_TARGET_CHARSET "UTF-8"
+#elif defined (_WIN32)
+#define GDB_DEFAULT_TARGET_CHARSET "CP1252"
+#endif
+
 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
    power of 2).  Round up/down when necessary.  Examples of correct
    use include:


-- 
Corinna Vinschen
Cygwin Project Co-Leader
Red Hat