[RFA 12/13] Add ATTRIBUTE_UNUSED to regdat.sh output

[Tom Tromey <tom@tromey.com>]

This changes regdat.sh to emit ATTRIBUTE_UNUSED for the
xmltarget_${name} variable.  This seemed simpler than trying to figure
out under exactly which circumstances each one was in fact used.

2018-07-12  Tom Tromey  <tom@tromey.com>

	* regformats/regdat.sh: Mark xmltarget_${name} with
	ATTRIBUTE_UNUSED.
---
 gdb/ChangeLog            | 5 +++++
 gdb/regformats/regdat.sh | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/gdb/regformats/regdat.sh b/gdb/regformats/regdat.sh
index 5a8564ac50c..7868e757582 100755
--- a/gdb/regformats/regdat.sh
+++ b/gdb/regformats/regdat.sh
@@ -164,12 +164,12 @@ done
 echo
 echo "static const char *expedite_regs_${name}[] = { \"`echo ${expedite} | sed 's/,/", "/g'`\", 0 };"
 if test "${feature}" != x; then
-  echo "static const char *xmltarget_${name} = 0;"
+  echo "static const char *xmltarget_${name} ATTRIBUTE_UNUSED = 0;"
 elif test "${xmltarget}" = x; then
   if test "${xmlarch}" = x && test "${xmlosabi}" = x; then
-    echo "static const char *xmltarget_${name} = 0;"
+    echo "static const char *xmltarget_${name} ATTRIBUTE_UNUSED = 0;"
   else
-    echo "static const char *xmltarget_${name} = \"@<target>\\"
+    echo "static const char *xmltarget_${name} ATTRIBUTE_UNUSED = \"@<target>\\"
     if test "${xmlarch}" != x; then
       echo "<architecture>${xmlarch}</architecture>\\"
     fi
@@ -179,7 +179,7 @@ elif test "${xmltarget}" = x; then
     echo "</target>\";"
   fi
 else
-  echo "static const char *xmltarget_${name} = \"${xmltarget}\";"
+  echo "static const char *xmltarget_${name} ATTRIBUTE_UNUSED = \"${xmltarget}\";"
 fi
 echo
 
-- 
2.13.6