https://gcc.gnu.org/g:f307ab8b18c7b5623344b01f24af593594319196
commit r16-2268-gf307ab8b18c7b5623344b01f24af593594319196
Author: Andrew Pinski <quic_apin...@quicinc.com>
Date: Tue Jul 15 08:56:31 2025 -0700
libgcc: Fix aarch64 build
For aarch64, libgcc is built with -Werror, after the latest
-Wunused-but-set* commit (r16-2258-g0eac9cfee8cb0b21d), a new warning
showed up:
```
../../../gcc/libgcc/config/libbid/bid_binarydecimal.c: In function
‘__binary32_to_bid128’:
../../../gcc/libgcc/config/libbid/bid_binarydecimal.c:130:31: error:
variable ‘c3’ set but not used [-Werror=unused-but-set-variable=]
130 | { unsigned long long c0,c1,c2,c3; \
| ^~
../../../gcc/libgcc/config/libbid/bid_binarydecimal.c:146842:5: note:
in expansion of macro ‘__mul_10x256_to_256’
146842 | __mul_10x256_to_256 (z.w[5], z.w[4], z.w[3], z.w[2],
z.w[5], z.w[4],
| ^~~~~~~~~~~~~~~~~~~
```
This fixes it by casting c3 to void after the last __mul_10x64 in
__mul_10x256_to_256 macro to mark it as being "used".
libgcc/config/libbid/ChangeLog:
* bid_binarydecimal.c (__mul_10x256_to_256): Mark c3 as being
used.
Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
Diff:
---
libgcc/config/libbid/bid_binarydecimal.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libgcc/config/libbid/bid_binarydecimal.c
b/libgcc/config/libbid/bid_binarydecimal.c
index daca2ffe306f..12e32b9667aa 100644
--- a/libgcc/config/libbid/bid_binarydecimal.c
+++ b/libgcc/config/libbid/bid_binarydecimal.c
@@ -132,6 +132,7 @@ UINT64 CY;
\
__mul_10x64(p1,c1,a1,c0); \
__mul_10x64(p2,c2,a2,c1); \
__mul_10x64(p3,c3,a3,c2); \
+ (void)c3; \
}
// Set up indices for low and high parts, depending on the endian-ness.
