# \[PATCH 03/18\] arm64: ensure the kernel is compiled for LP64

- From: Yury Norov \<hidden\>
- Date: 2016-08-17 12:02:35 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2016/08/4816397
- Thread: https://ratatoskr.run/linux-arm-kernel/2016/08/4816396/t.md

```text
From: Andrew Pinski <redacted>

The kernel needs to be compiled as a LP64 binary for ARM64, even when
using a compiler that defaults to code-generation for the ILP32 ABI.
Consequently, we need to explicitly pass '-mabi=lp64' (supported on
gcc-4.9 and newer).

Signed-off-by: Andrew Pinski <redacted>
Signed-off-by: Philipp Tomsich <redacted>
Signed-off-by: Christoph Muellner <redacted>
Signed-off-by: Yury Norov <redacted>
Reviewed-by: David Daney <redacted>
---
 arch/arm64/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 5b54f8c..4800227 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -34,14 +34,19 @@ KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
 KBUILD_AFLAGS	+= $(lseinstr)
 
+KBUILD_CFLAGS	+= $(call cc-option,-mabi=lp64)
+KBUILD_AFLAGS	+= $(call cc-option,-mabi=lp64)
+
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 AS		+= -EB
 LD		+= -EB
+LDFLAGS		+= -maarch64linuxb
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 AS		+= -EL
 LD		+= -EL
+LDFLAGS		+= -maarch64linux
 endif
 
 CHECKFLAGS	+= -D__aarch64__
-- 
2.7.4
```