Author: dim
Date: Wed Dec 21 17:01:13 2011
New Revision: 228783
URL: http://svn.freebsd.org/changeset/base/228783
Log:
When building with clang, disable -Wshift-count-negative and
-Wshift-count-overflow for sys/dev/ath/ath_hal/ah_regdomain.c, as it
gets multiple instances of the following warnings:
In file included from sys/dev/ath/ath_hal/ah_regdomain.c:99:
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:69:15: warning: shift count
is negative [-Wshift-count-negative]
.chan11a = BM4(F1_4950_4980,
^~~~~~~~~~~~~~~~~
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:41:4: note: expanded from:
W1(_fa) | W1(_fb) | W1(_fc) | W1(_fd) }
^
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:34:45: note: expanded from:
(((_a) > 63 && (_a) < 128 ? (((uint64_t) 1)<<((_a)-64)) : (uint64_t)
0))
^ ~~~~~~~~~
and:
In file included from sys/dev/ath/ath_hal/ah_regdomain.c:99:
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:629:15: error: shift count
>= width of type [-Werror,-Wshift-count-overflow]
.chan11a = BM4(W2_5260_5320,
^~~~~~~~~~~~~~~~~
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:40:34: note: expanded from:
{ W0(_fa) | W0(_fb) | W0(_fc) | W0(_fd), \
^
sys/dev/ath/ath_hal/ah_regdomain/ah_rd_domains.h:32:44: note: expanded from:
(((_a) >= 0 && (_a) < 64 ? (((uint64_t) 1)<<(_a)) : (uint64_t) 0))
^ ~~~~
Both warnings are false positives, caused by LLVM PR 10030. For global
initializations, clang fails to detect that the branch of the ternary
operator causing the warning is dead.
MFC after: 1 week
Modified:
head/sys/conf/files
head/sys/conf/kern.mk
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Wed Dec 21 16:47:01 2011 (r228782)
+++ head/sys/conf/files Wed Dec 21 17:01:13 2011 (r228783)
@@ -613,7 +613,7 @@ dev/ath/ath_hal/ah_eeprom_9287.c \
optional ath_hal | ath_ar9287 \
compile-with "${NORMAL_C} -I$S/dev/ath"
dev/ath/ath_hal/ah_regdomain.c optional ath \
- compile-with "${NORMAL_C} -I$S/dev/ath"
+ compile-with "${NORMAL_C} ${NO_WSHIFT_COUNT_NEGATIVE}
${NO_WSHIFT_COUNT_OVERFLOW} -I$S/dev/ath"
# ar5210
dev/ath/ath_hal/ar5210/ar5210_attach.c optional ath_hal | ath_ar5210 \
compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal"
Modified: head/sys/conf/kern.mk
==============================================================================
--- head/sys/conf/kern.mk Wed Dec 21 16:47:01 2011 (r228782)
+++ head/sys/conf/kern.mk Wed Dec 21 17:01:13 2011 (r228783)
@@ -17,6 +17,8 @@ CWARNFLAGS?= -Wall -Wredundant-decls -Wn
.if ${CC:T:Mclang} == "clang"
NO_WCONSTANT_CONVERSION= -Wno-constant-conversion
NO_WARRAY_BOUNDS= -Wno-array-bounds
+NO_WSHIFT_COUNT_NEGATIVE= -Wno-shift-count-negative
+NO_WSHIFT_COUNT_OVERFLOW= -Wno-shift-count-overflow
.endif
#
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