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uboot: arm64 arch build support

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For a 64bit arm architecture, Buildroot uses arm64 terminology and
from the top-level Makefile KERNEL_ARCH is set to arm64 which is then
passed to the uboot build.  This causes a compilation issue as uboot
uses the top-level system architecture as it's $(ARCH).  So
arch/$(ARCH)/Makefile doesn't work with arm64 unless we adjust the
arch.

[Thomas:
 - rewrap commit message text.
 - simplify comment in the code.]

Signed-off-by: Ronak Desai <ronak.desai@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Ronak Desai 2015-10-12 13:53:16 -05:00 committed by Thomas Petazzoni
parent 50963b165d
commit 4730df02cf
1 changed files with 6 additions and 0 deletions
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6
boot/uboot/uboot.mk
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@ -71,7 +71,13 @@ UBOOT_BIN = u-boot.bin
UBOOT_BIN_IFT = $(UBOOT_BIN).ift UBOOT_BIN_IFT = $(UBOOT_BIN).ift
endif endif
# The kernel calls AArch64 'arm64', but U-Boot calls it just 'arm', so
# we have to special case it.
ifeq ($(KERNEL_ARCH),arm64)
UBOOT_ARCH = arm
else
UBOOT_ARCH = $(KERNEL_ARCH) UBOOT_ARCH = $(KERNEL_ARCH)
endif
UBOOT_MAKE_OPTS += \ UBOOT_MAKE_OPTS += \
CROSS_COMPILE="$(TARGET_CROSS)" \ CROSS_COMPILE="$(TARGET_CROSS)" \