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Subject[PATCH] arm64: Enforce endianness build flags for LD and AS
Date
If LD or AS is specified on the command line using "make LD=<my-ld>",
the endianness flag will not be added. Depending on the toolchain used,
this can result in endianness mismatch errors, such as

aarch64-cros-linux-gnu/binutils-bin/2.27.0/ld.bfd.real:
arch/arm64/crypto/.tmp_aes-ce-cipher.o:
compiled for a big endian system and target is little endian

The problem was observed when using the Chrome OS build system (which sets
LD on the command line) for an arm64:allmodconfig build.

Use the override flag for both LD and AS to ensure that the endianness
flag is always set.

Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
arch/arm64/Makefile | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 939b310913cf..d780d00bea9c 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -56,15 +56,15 @@ KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
-AS += -EB
-LD += -EB
+override AS += -EB
+override LD += -EB
LDFLAGS += -maarch64linuxb
UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
-AS += -EL
-LD += -EL
+override AS += -EL
+override LD += -EL
LDFLAGS += -maarch64linux
UTS_MACHINE := aarch64
endif
--
2.7.4
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