[PATCH AUTOSEL 5.3 46/89] arm64: Default to building compat vDSO with clang when CONFIG_CC_IS_CLANG

From: Sasha Levin
Date: Fri Oct 18 2019 - 18:26:04 EST


From: Will Deacon <will@xxxxxxxxxx>

[ Upstream commit 24ee01a927bfe56c66429ec4b1df6955a814adc8 ]

Rather than force the use of GCC for the compat cross-compiler, instead
extract the target from CROSS_COMPILE_COMPAT and pass it to clang if the
main compiler is clang.

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/arm64/Makefile | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 9743b50bdee7d..5858d6e449268 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -47,7 +47,11 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable)
endif
endif

+ifeq ($(CONFIG_CC_IS_CLANG), y)
+COMPATCC ?= $(CC) --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
+else
COMPATCC ?= $(CROSS_COMPILE_COMPAT)gcc
+endif
export COMPATCC

ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y)
--
2.20.1