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kbuild, LLVMLinux: Supress warnings unless W=1-3

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clang has more warnings enabled by default. Turn them off unless W is
set. This patch fixes a logic bug where warnings in clang were disabled
when W was set.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Cc: bp@alien8.de
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Behan Webster 2014-07-31 21:08:25 -07:00 committed by Michal Marek
parent bfaf2dd350
commit 26ea6bb1fe
2 changed files with 12 additions and 10 deletions
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1
Makefile
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@ -663,6 +663,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
# source of a reference will be _MergedGlobals and not on of the whitelisted names.
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
else
# This warning generated too much noise in a regular build.

21
scripts/Makefile.extrawarn
View File

@ -26,16 +26,6 @@ warning-1 += $(call cc-option, -Wmissing-include-dirs)
warning-1 += $(call cc-option, -Wunused-but-set-variable)
warning-1 += $(call cc-disable-warning, missing-field-initializers)
# Clang
warning-1 += $(call cc-disable-warning, initializer-overrides)
warning-1 += $(call cc-disable-warning, unused-value)
warning-1 += $(call cc-disable-warning, format)
warning-1 += $(call cc-disable-warning, unknown-warning-option)
warning-1 += $(call cc-disable-warning, sign-compare)
warning-1 += $(call cc-disable-warning, format-zero-length)
warning-1 += $(call cc-disable-warning, uninitialized)
warning-1 += $(call cc-option, -fcatch-undefined-behavior)
warning-2 := -Waggregate-return
warning-2 += -Wcast-align
warning-2 += -Wdisabled-optimization
@ -64,4 +54,15 @@ ifeq ("$(strip $(warning))","")
endif
KBUILD_CFLAGS += $(warning)
else
ifeq ($(COMPILER),clang)
KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)
KBUILD_CFLAGS += $(call cc-disable-warning, format)
KBUILD_CFLAGS += $(call cc-disable-warning, unknown-warning-option)
KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)
KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)
KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)
endif
endif