[PATCH] Use gdb_static_assert in charset.c

["Christian Biesinger via gdb-patches" <gdb-patches@sourceware.org>]

It currently has a "manual" static assert.

gdb/ChangeLog:

2019-10-07  Christian Biesinger  <cbiesinger@google.com>

	* charset.c (your_gdb_wchar_t_is_bogus): Replace with a
	gdb_static_assert.
---
 gdb/charset.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/gdb/charset.c b/gdb/charset.c
index 9df46c0c74d..73131651a6d 100644
--- a/gdb/charset.c
+++ b/gdb/charset.c
@@ -946,15 +946,9 @@ default_auto_wide_charset (void)
 #define ENDIAN_SUFFIX "LE"
 #endif
 
-/* The code below serves to generate a compile time error if
-   gdb_wchar_t type is not of size 2 nor 4, despite the fact that
-   macro __STDC_ISO_10646__ is defined.
-   This is better than a gdb_assert call, because GDB cannot handle
-   strings correctly if this size is different.  */
-
-extern char your_gdb_wchar_t_is_bogus[(sizeof (gdb_wchar_t) == 2
-				       || sizeof (gdb_wchar_t) == 4)
-				      ? 1 : -1];
+/* GDB cannot handle strings correctly if this size is different.  */
+
+gdb_static_assert (sizeof (gdb_wchar_t) == 2 || sizeof (gdb_wchar_t) == 4);
 
 /* intermediate_encoding returns the charset used internally by
    GDB to convert between target and host encodings. As the test above
-- 
2.23.0.581.g78d2f28ef7-goog