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From: Stefan Agner <stefan@agner.ch>
To: linux@armlinux.org.uk, ard.biesheuvel@linaro.org, arnd@arndb.de
Cc: nicolas.pitre@linaro.org, marc.zyngier@arm.com,
behanw@converseincode.com, keescook@chromium.org,
Bernhard.Rosenkranzer@linaro.org, mka@chromium.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Stefan Agner <stefan@agner.ch>
Subject: [PATCH 5/5] ARM: add support for building ARM kernel with clang
Date: Wed, 21 Mar 2018 00:02:06 +0100 [thread overview]
Message-ID: <20180320230206.25289-6-stefan@agner.ch> (raw)
In-Reply-To: <20180320230206.25289-1-stefan@agner.ch>
Use cc-options call for compiler options which are not available
in clang. With this patch an ARMv7 multi platform kernel can be
successfully build using clang (tested with version 5.0.1).
Based-on-patches-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
arch/arm/Makefile | 2 +-
arch/arm/boot/compressed/Makefile | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index e9e3fde3c657..20e9fee1ccc5 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -39,7 +39,7 @@ KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
endif
ifeq ($(CONFIG_FRAME_POINTER),y)
-KBUILD_CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
+KBUILD_CFLAGS +=-fno-omit-frame-pointer $(call cc-option,-mapcs,) $(call cc-option,-mno-sched-prolog,)
endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 45a6b9b7af2a..6a5c4ac97703 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -113,7 +113,7 @@ CFLAGS_fdt_ro.o := $(nossp_flags)
CFLAGS_fdt_rw.o := $(nossp_flags)
CFLAGS_fdt_wip.o := $(nossp_flags)
-ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
+ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin -I$(obj)
asflags-y := -DZIMAGE
# Supply kernel BSS size to the decompressor via a linker symbol.
--
2.16.2
next prev parent reply other threads:[~2018-03-20 23:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-20 23:02 [PATCH 0/5] ARM: clang support Stefan Agner
2018-03-20 23:02 ` [PATCH 1/5] bus: arm-cci: use asm unreachable Stefan Agner
2018-03-20 23:30 ` Russell King - ARM Linux
2018-03-21 8:22 ` Stefan Agner
2018-03-20 23:02 ` [PATCH 2/5] efi/libstub/arm: add support for building with clang Stefan Agner
2018-03-20 23:02 ` [PATCH 3/5] ARM: trusted_foundations: do not use naked function Stefan Agner
2018-03-20 23:13 ` Russell King - ARM Linux
2018-03-21 8:41 ` Stefan Agner
2018-03-21 12:13 ` Robin Murphy
2018-03-21 14:09 ` Stefan Agner
2018-03-21 15:26 ` Dmitry Osipenko
2018-03-21 16:40 ` Stephen Warren
2018-03-21 17:16 ` Robin Murphy
2018-03-21 21:41 ` Stefan Agner
2018-03-22 11:48 ` Robin Murphy
2018-03-22 12:43 ` Stefan Agner
2018-03-22 14:03 ` Dmitry Osipenko
2018-03-20 23:02 ` [PATCH 4/5] ARM: drop no-thumb-interwork in EABI mode Stefan Agner
2018-03-20 23:02 ` Stefan Agner [this message]
2018-03-20 23:18 ` [PATCH 5/5] ARM: add support for building ARM kernel with clang Russell King - ARM Linux
2018-03-21 0:20 ` Matthias Kaehlcke
2018-03-21 9:03 ` Stefan Agner
2018-03-25 13:24 ` Stefan Agner
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