Port to recent gcc -fsanitize=undefined

* src/alloc.c (XPNTR): Add ATTRIBUTE_NO_SANITIZE_UNDEFINED and
remove ATTRIBUTE_UNUSED.  Do not define as a macro, so that
ATTRIBUTE_NO_SANITIZE_UNDEFINED works.
* src/lisp.h (lisp_h_XSYMBOL): Remove.  All uses removed.
With recent GCC the macro does not work with -fsanitize=undefined,
and the macro can be omitted as its only function is to optimize -O0.

1 files changed, 1 insertions, 5 deletions

diff --git a/src/alloc.c b/src/alloc.c
index b5b6dc2f05f..a9cdd77ef2e 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -558,16 +558,12 @@ PNTR_ADD (char *p, EMACS_UINT i)
                  - ((EMACS_UINT) Lisp_Symbol << (USE_LSB_TAG ? 0 : VALBITS)))) \
     : (char *) XLP (o) - (XLI (o) & ~VALMASK)))
 
-static ATTRIBUTE_UNUSED void *
+static ATTRIBUTE_NO_SANITIZE_UNDEFINED void *
 XPNTR (Lisp_Object a)
 {
   return macro_XPNTR (a);
 }
 
-#if DEFINE_KEY_OPS_AS_MACROS
-# define XPNTR(a) macro_XPNTR (a)
-#endif
-
 static void
 XFLOAT_INIT (Lisp_Object f, double n)
 {