gcc: rename CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET to CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

configure

@@ -3078,7 +3078,7 @@ int main(void) {
 }
 EOF
 if compile_prog "-Werror" "" ; then
-    pragma_disable_unused_but_set=yes
+    pragma_diagnostic_available=yes
 fi
 
 ########################################
@@ -3648,8 +3648,8 @@ if test "$linux_magic_h" = "yes" ; then
   echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
 fi
 
-if test "$pragma_disable_unused_but_set" = "yes" ; then
-  echo "CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET=y" >> $config_host_mak
+if test "$pragma_diagnostic_available" = "yes" ; then
+  echo "CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE=y" >> $config_host_mak
 fi
 
 if test "$valgrind_h" = "yes" ; then

coroutine-ucontext.c

@@ -200,7 +200,7 @@ Coroutine *qemu_coroutine_new(void)
 }
 
 #ifdef CONFIG_VALGRIND_H
-#ifdef CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET
+#ifdef CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
 /* Work around an unused variable in the valgrind.h macro... */
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 #endif
@@ -208,7 +208,7 @@ static inline void valgrind_stack_deregister(CoroutineUContext *co)
 {
     VALGRIND_STACK_DEREGISTER(co->valgrind_stack_id);
 }
-#ifdef CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET
+#ifdef CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
 #pragma GCC diagnostic error "-Wunused-but-set-variable"
 #endif
 #endif