The branch main has been updated by rew:
URL:
https://cgit.FreeBSD.org/src/commit/?id=e8e691983bb75e80153b802f47733f1531615fa2
commit e8e691983bb75e80153b802f47733f1531615fa2
Author: Robert Wing <r...@freebsd.org>
AuthorDate: 2022-04-05 21:28:54 +0000
Commit: Robert Wing <r...@freebsd.org>
CommitDate: 2022-04-05 21:34:34 +0000
suppress set but not used warnings for kernel builds
Use -Wno-unused-but-set-variable for kernel builds with clang13.
To turn this warning back on, set the following in src.conf:
WITH_SET_BUT_NOTUSED_KERNEL_WARNINGS=
Reviewed by: mjg, imp
Differential Revision: https://reviews.freebsd.org/D34784
---
sys/conf/kern.mk | 6 +++++-
sys/conf/kern.opts.mk | 3 ++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index f97be774ea10..67756b7fb986 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -43,7 +43,11 @@ CWARNEXTRA?= -Wno-error=tautological-compare
-Wno-error=empty-body \
CWARNEXTRA+= -Wno-error=shift-negative-value
CWARNEXTRA+= -Wno-address-of-packed-member
.if ${COMPILER_VERSION} >= 130000
-CWARNFLAGS+= -Wno-error=unused-but-set-variable
+.if ${MK_SET_BUT_NOTUSED_KERNEL_WARNINGS} == "no"
+CWARNEXTRA+= ${NO_WUNUSED_BUT_SET_VARIABLE}
+.else
+CWARNEXTRA+= -Wno-error=unused-but-set-variable
+.endif
.endif
.endif # clang
diff --git a/sys/conf/kern.opts.mk b/sys/conf/kern.opts.mk
index 077009baebf0..19789180ee93 100644
--- a/sys/conf/kern.opts.mk
+++ b/sys/conf/kern.opts.mk
@@ -60,7 +60,8 @@ __DEFAULT_NO_OPTIONS = \
INIT_ALL_ZERO \
KERNEL_RETPOLINE \
RATELIMIT \
- REPRODUCIBLE_BUILD
+ REPRODUCIBLE_BUILD \
+ SET_BUT_NOTUSED_KERNEL_WARNINGS
# Some options are totally broken on some architectures. We disable
# them. If you need to enable them on an experimental basis, you
