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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 2/5] efi/libstub/arm: add support for building with clang
Date: Wed, 21 Mar 2018 00:02:03 +0100	[thread overview]
Message-ID: <20180320230206.25289-3-stefan@agner.ch> (raw)
In-Reply-To: <20180320230206.25289-1-stefan@agner.ch>

Use cc-options call for -mno-single-pic-base since the option is
not available in clang. LLVM/clang always assumes a fixed
displacement between text/data and hence uses PC relative
addressing.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
 drivers/firmware/efi/libstub/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 7b3ba40f0745..2bf69cca0d87 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -13,7 +13,8 @@ cflags-$(CONFIG_X86)		+= -m$(BITS) -D__KERNEL__ -O2 \
 
 cflags-$(CONFIG_ARM64)		:= $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
 cflags-$(CONFIG_ARM)		:= $(subst -pg,,$(KBUILD_CFLAGS)) \
-				   -fno-builtin -fpic -mno-single-pic-base
+				   -fno-builtin -fpic \
+				   $(call cc-option,-mno-single-pic-base,)
 
 cflags-$(CONFIG_EFI_ARMSTUB)	+= -I$(srctree)/scripts/dtc/libfdt
 
-- 
2.16.2

  parent reply	other threads:[~2018-03-20 23:03 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 ` Stefan Agner [this message]
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 ` [PATCH 5/5] ARM: add support for building ARM kernel with clang Stefan Agner
2018-03-20 23:18   ` 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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