Fix "set but not used" warnings from MIPS bits/atomic.h.

diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index cdf4ea3..f5e73f8 100644 (file)
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -1,3 +1,12 @@
+2012-11-17  Joseph Myers  <joseph@codesourcery.com>
+
+       * sysdeps/mips/bits/atomic.h
+       (__arch_compare_and_exchange_bool_8_int): Mark __PREV variable
+       with __attribute__ ((unused)).
+       (__arch_compare_and_exchange_bool_16_int): Likewise.
+       (__arch_compare_and_exchange_bool_32_int): Likewise.
+       (__arch_compare_and_exchange_bool_64_int): Likewise.
+
 2012-11-06  Maxim Kuvyrkov  <maxim@codesourcery.com>
 
         * sysdeps/mips/memmove.c: New file.  Use memcpy for forward memmove.

diff --git a/ports/sysdeps/mips/bits/atomic.h b/ports/sysdeps/mips/bits/atomic.h
index 749e166..c5a26b9 100644 (file)
--- a/ports/sysdeps/mips/bits/atomic.h
+++ b/ports/sysdeps/mips/bits/atomic.h
@@ -261,22 +261,22 @@ typedef uintmax_t uatomic_max_t;
 /* For all "bool" routines, we return FALSE if exchange succesful.  */
 
 # define __arch_compare_and_exchange_bool_8_int(mem, new, old, rel, acq) \
-({ typeof (*mem) __prev; int __cmp;                                    \
+({ typeof (*mem) __prev __attribute__ ((unused)); int __cmp;           \
    __arch_compare_and_exchange_xxx_8_int(mem, new, old, rel, acq);     \
    !__cmp; })
 
 # define __arch_compare_and_exchange_bool_16_int(mem, new, old, rel, acq) \
-({ typeof (*mem) __prev; int __cmp;                                    \
+({ typeof (*mem) __prev __attribute__ ((unused)); int __cmp;           \
    __arch_compare_and_exchange_xxx_16_int(mem, new, old, rel, acq);    \
    !__cmp; })
 
 # define __arch_compare_and_exchange_bool_32_int(mem, new, old, rel, acq) \
-({ typeof (*mem) __prev; int __cmp;                                    \
+({ typeof (*mem) __prev __attribute__ ((unused)); int __cmp;           \
    __arch_compare_and_exchange_xxx_32_int(mem, new, old, rel, acq);    \
    !__cmp; })
 
 # define __arch_compare_and_exchange_bool_64_int(mem, new, old, rel, acq) \
-({ typeof (*mem) __prev; int __cmp;                                    \
+({ typeof (*mem) __prev __attribute__ ((unused)); int __cmp;           \
    __arch_compare_and_exchange_xxx_64_int(mem, new, old, rel, acq);    \
    !__cmp; })