diff -Nuar u-boot-at91/build.sh u-boot-at91-sama5d4/build.sh
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--- u-boot-at91/build.sh 1970-01-01 08:00:00.000000000 +0800
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+++ u-boot-at91-sama5d4/build.sh 2019-08-04 22:47:21.589680602 +0800
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@@ -0,0 +1,66 @@
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+#!/bin/bash
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+
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+BOARD=sama5d4
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+TFTP_PATH=/tftp
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+IMGS_PATH=../images
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+IMG_NAME=u-boot-${BOARD}.bin
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+
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+CROSSTOOL=/opt/buildroot/cortex-a5/bin/arm-linux-
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+JOBS=`cat /proc/cpuinfo |grep "processor"|wc -l`
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+
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+
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+function do_clean()
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+{
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+ make CROSS_COMPILE=${CROSSTOOL} distclean
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+ rm -f ${IMG_NAME}
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+}
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+
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+function do_modify()
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+{
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+ grep "arm-linux-gnueabi" Makefile > /dev/null
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+
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+ if [ $? == 0 ] ; then
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+ return ;
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+ fi
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+
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+ echo "Modify Makefile for ARCH and cross compiler"
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+ sed -i -e "s|^CROSS_COMPILE=.*|CROSS_COMPILE=${CROSSTOOL}|g" Makefile
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+}
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+
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+function do_build()
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+{
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+ make ${BOARD}_xplained_nandflash_config
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+
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+ make -j${JOBS}
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+
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+ cp u-boot.bin ${IMG_NAME}
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+
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+ chmod a+x ${IMG_NAME}
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+}
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+
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+function do_install()
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+{
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+ if [ -d $TFTP_PATH ] ;then
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+ cp ${IMG_NAME} $TFTP_PATH
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+ fi
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+
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+ if [ -d ${IMGS_PATH} ] ; then
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+ cp ${IMG_NAME} $IMGS_PATH
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+ fi
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+}
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+
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+if [ "$1" == "clean" ] ; then
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+
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+ do_clean
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+ exit 0;
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+fi
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+
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+do_modify
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+
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+set -e
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+
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+do_build
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+
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+do_install
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+
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+
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diff -Nuar u-boot-at91/Makefile u-boot-at91-sama5d4/Makefile
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--- u-boot-at91/Makefile 2019-08-04 21:52:12.000000000 +0800
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+++ u-boot-at91-sama5d4/Makefile 2019-08-04 22:42:31.053675028 +0800
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@@ -194,6 +194,9 @@
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#########################################################################
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+ARCH=arm
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+CROSS_COMPILE=/opt/crosstool/cortex-a7/bin/arm-linux-gnueabi-
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+
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# set default to nothing for native builds
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ifeq ($(HOSTARCH),$(ARCH))
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CROSS_COMPILE ?=
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