When build U-boot with clang with using commands:
$ make HOSTCC=clang xenguest_arm64_defconfig $ make HOSTCC=clang CROSS_COMPILE=aarch64-linux-gnu- \ CC="clang -target aarch64-linux-gnueabi" -j8
The compiler reports error:
/tmp/start-acdf31.s:330:1: error: symbol '_start' is already defined _start: ^
Because the symbol '_start' has been defined twice, one is defined in arch/arm/cpu/armv8/start.S, another is defined in the header boot0-linux-kernel-header.h.
To fix building failure, this patch removes the symbol '_start' from boot0-linux-kernel-header.h.
Signed-off-by: Leo Yan leo.yan@linaro.org --- arch/arm/include/asm/boot0-linux-kernel-header.h | 2 -- 1 file changed, 2 deletions(-)
diff --git a/arch/arm/include/asm/boot0-linux-kernel-header.h b/arch/arm/include/asm/boot0-linux-kernel-header.h index c6cd76f32a..c930fea5fd 100644 --- a/arch/arm/include/asm/boot0-linux-kernel-header.h +++ b/arch/arm/include/asm/boot0-linux-kernel-header.h @@ -31,8 +31,6 @@ .long \sym()_hi32 .endm
-.globl _start -_start: /* * DO NOT MODIFY. Image header expected by Linux boot-loaders. */