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# CROSS-COMPILING
Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The device is appears as "_/dev/mmcblk0_" (with "_/dev/mmcblk0p1_" and "_/dev/mmcblk0p2_" as the partitions) in the target machine, but it can be seen as "_/dev/sdX_" in your x86 computer.
Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The device will appears as "_/dev/mmcblk0_" (with "_/dev/mmcblk0p1_" and "_/dev/mmcblk0p2_" as the partitions) in the target machine, but it can be seen as "_/dev/sdX_" in your x86 computer.
## TOC
@@ -15,10 +15,10 @@ Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The
## CROSS COMPILATION TOOLS
Installing GCC cross compilation tools (for the X86 machine, not target ARM). Includes binutils.
* OPTION 1: from repository (Devuan example)
* OPTION 1: From repository (Devuan example)
`sudo apt-get install gcc-arm-none-eabi`
* OPTION 2: proportioned by odroid
* OPTION 2: Proportioned by odroid
```
wget http://odroid.in/guides/ubuntu-lfs/arm-unknown-linux-gnueabi.tar.xz
tar -Jxf arm-unknown-linux-gnueabi.tar.xz
@@ -28,55 +28,55 @@ Name of "_CROSS_COMPILE_" variable will change depending on the choosen option.
## PARTITIONING
* clear the section for the bootloader
`dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=8`
* enter fdisk
`fdisk /dev/mmcblk0`
* help
* Clear the section for the bootloader
`dd if=/dev/zero of=/dev/sdX bs=1M count=8`
* Enter fdisk
`fdisk /dev/sdX`
* Help
`m`
* create new MBR partition table
* Create new MBR partition table
`o`
* create boot partition
* Create boot partition
`n`
* make primary partition
* Make primary partition
`p`
* choose partition number
* Choose partition number
`1`
* assign start of boot partition at the end of the bootloader space
* Assign start of boot partition at the end of the bootloader space
`3073`
* assign end of boot partition
* Assign end of boot partition
`+128M`
* change display units to cylinders
* Change display units to cylinders
`u`
* create root partition
* Create root partition
`n`
* make primary partition
* Make primary partition
`p`
* choose partition number
* Choose partition number
`2`
* assign start of boot partition at the end of the bootloader space (default cylinder)
* Assign start of boot partition at the end of the bootloader space (default cylinder)
`131`
* assign end of boot partition (default) by pressing ENTER
* change display units back to sectors
* Assign end of boot partition (default) by pressing ENTER
* Change display units back to sectors
`u`
* show the partitions
* Show the partitions
`p`
* if you agree save and exit
* If you agree save and exit
`w`
* if you disagree delete a partition and start from that partition
* If you disagree delete a partition and start from that partition
`d`
* or exit without saving
`q`
* Make root filesystem
`mkfs.<ROOT_FILESYSTEM> /dev/mmcblk0p2`
`mkfs.<ROOT_FILESYSTEM> /dev/sdX2`
* Make boot filesystem according to supported bootloader (only "_mkfs.vfat_")
`mkfs.<BOOTLOADER_FILESYSTEM> /dev/mmcblk0p1`
`mkfs.<BOOTLOADER_FILESYSTEM> /dev/sdX1`
## BOOTLOADER
Minimum 3072 bytes free at the start of the drive and before the boot partition.
* VERSION 1: compile
* VERSION 1: Compile bootloader yourself
```
git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01
cd u-boot
@@ -85,44 +85,44 @@ make -j4
cd boot
```
* VERSION 2: download and extract the binary
* VERSION 2: Download and extract the binary
```
wget http://odroid.in/guides/ubuntu-lfs/boot.tar.gz # http://dn.odroid.com/S905/BootLoader/ODROID-C2/c2_boot_release_ubuntu.tar.gz
tar -zxvf boot.tar.xz
cd boot
```
* flash bootloader
* Flash bootloader
```
chmod +x sd_fusing.sh
./sd_fusing.sh /dev/sdX
```
* notice the target is the device NOT any partition
* set resolution by editing file root/boot/boot.ini
* might want to comment-out the display-autodetect option
* Notice the target is the device NOT any partition
* Set resolution by editing file root/boot/boot.ini
* Might want to comment-out the display-autodetect option
## MOUNTING
* mount root filesystem
`mount /dev/mmcblk0p2 /mnt`
* create boot directory
* Mount root filesystem
`mount /dev/sdX2 /mnt`
* Create boot directory
`mkdir /mnt/boot`
* mount boot filesystem
`mount /dev/mmcblk0p1 /mnt/boot`
* Mount boot filesystem
`mount /dev/sdX1 /mnt/boot`
## BOOT PARTITION
Must be FAT32 and 64 MB minimum.
* cloning kernel repo to destination "odroidc2-kernel-folder"
* Clone kernel repo to destination "odroidc2-kernel-folder"
`git clone --depth 1 --single-branch https://github.com/hardkernel/linux.git --branch odroidc2-v3.16.y odroidc2-kernel-folder`
* enter destination folder
* Enter destination folder
`cd odroidc2-kernel-folder`
* OPTION 1: making kernel config
* OPTION 1: Make kernel config (oneliner)
`make ARCH=arm64 CROSS_COMPILE=arm-none-eabi- odroidc2_defconfig`
* OPTION 2: making kernel config
* OPTION 2: Make kernel config
```
export ARCH=arm64
export CROSS_COMPILE=arm-none-eabi-
@@ -150,4 +150,6 @@ make odroidc2_defconfig
Can be the rest of the disk.
* Download CRUX image
`wget -c http://resources.crux-arm.nu/files/devel-test/3.3/crux-arm-rootfs-3.3-64b-RC2.tar.xz`
`wget -c http://resources.crux-arm.nu/files/devel-test/3.3/crux-arm-rootfs-3.3-64b-RC2.tar.xz`
* Extract CRUX image
`aunpack crux-arm-rootfs-3.3-64b-RC2.tar.xz`