[gcc r12-4193] Mark argument as unused

[Jan-Benedict Glaw <jbglaw@gcc.gnu.org>]

https://gcc.gnu.org/g:370374c4d91d83fb69d4b70dd4e48103114a903d

commit r12-4193-g370374c4d91d83fb69d4b70dd4e48103114a903d
Author: Jan-Benedict Glaw <jbglaw@lug-owl.de>
Date:   Tue Oct 5 17:16:49 2021 +0200

    Mark argument as unused
    
    The `loc` argument may or may not be used, depending on some #ifdefs.
    Mark it as ATTRIBUTE_UNUSED, though it might be worth polishing the
    whole target hook to not depend on the #ifdef'ed code at all.
    
    gcc/ChangeLog:
    
            * common/config/avr/avr-common.c (avr_handle_option): Mark
            argument as ATTRIBUTE_UNUSED.

Diff:
---
 gcc/common/config/avr/avr-common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/common/config/avr/avr-common.c b/gcc/common/config/avr/avr-common.c
index 6486659d27c..a6939ad03d3 100644
--- a/gcc/common/config/avr/avr-common.c
+++ b/gcc/common/config/avr/avr-common.c
@@ -77,7 +77,8 @@ static const struct default_options avr_option_optimization_table[] =
 
 static bool
 avr_handle_option (struct gcc_options *opts, struct gcc_options*,
-                   const struct cl_decoded_option *decoded, location_t loc)
+                   const struct cl_decoded_option *decoded,
+                   location_t loc ATTRIBUTE_UNUSED)
 {
   int value = decoded->value;