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Message-ID: <20190415161206.GA6928@archlinux-i9> Date: Mon, 15 Apr 2019 09:12:06 -0700 From: Nathan Chancellor <natechancellor@...il.com> To: Arnd Bergmann <arnd@...db.de> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>, Heiko Carstens <heiko.carstens@...ibm.com>, clang-built-linux@...glegroups.com, Nick Desaulniers <ndesaulniers@...gle.com>, linux-s390@...r.kernel.org, Vasily Gorbik <gor@...ux.ibm.com>, Masahiro Yamada <yamada.masahiro@...ionext.com>, Luc Van Oostenryck <luc.vanoostenryck@...il.com>, Philipp Rudo <prudo@...ux.ibm.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 2/4] s390: boot, purgatory: pass $(CLANG_FLAGS) where needed On Mon, Apr 15, 2019 at 10:35:52AM +0200, Arnd Bergmann wrote: > The purgatory and boot Makefiles do not inherit the original cflags, > so clang falls back to the default target architecture when building it, > typically this would be x86 when cross-compiling. > > Add $(CLANG_FLAGS) everywhere so we pass the correct --target=s390x-linux > option when cross-compiling. > > Signed-off-by: Arnd Bergmann <arnd@...db.de> Reviewed-by: Nathan Chancellor <natechancellor@...il.com> > --- > arch/s390/Makefile | 4 ++-- > arch/s390/purgatory/Makefile | 1 + > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/s390/Makefile b/arch/s390/Makefile > index 9c079a506325..9a228786e34f 100644 > --- a/arch/s390/Makefile > +++ b/arch/s390/Makefile > @@ -17,9 +17,9 @@ KBUILD_CFLAGS_MODULE += -fPIC > KBUILD_AFLAGS += -m64 > KBUILD_CFLAGS += -m64 > aflags_dwarf := -Wa,-gdwarf-2 > -KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__ > +KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ > KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) > -KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2 > +KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 > KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY > KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float > KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables > diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile > index ce6a3f75065b..ecd0b3847fef 100644 > --- a/arch/s390/purgatory/Makefile > +++ b/arch/s390/purgatory/Makefile > @@ -22,6 +22,7 @@ KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes > KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare > KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding > KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float -fno-common > +KBUILD_CFLAGS += $(CLANG_FLAGS) > KBUILD_CFLAGS += $(call cc-option,-fno-PIE) > KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) > > -- > 2.20.0 >
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