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CROSS-COMPILING.md
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# CROSS-COMPILING # CROSS-COMPILING
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. 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. The unpacking tool is provided by [Atool](http://www.nongnu.org/atool/).
## TOC ## TOC
@ -15,16 +15,17 @@ Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The
## CROSS COMPILATION TOOLS ## CROSS COMPILATION TOOLS
Installing GCC cross compilation tools (for the X86 machine, not target ARM). Includes binutils. Installing GCC cross compilation tools (for the X86 machine, not target ARM). Includes binutils.
* OPTION 1: From repository (Devuan example) * OPTION 1: Proportioned by [Linaro](https://releases.linaro.org/components/toolchain/binaries/latest/aarch64-linux-gnu/)
```
wget -c https://releases.linaro.org/components/toolchain/binaries/latest/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
aunpack gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
```
* OPTION 2: From repository (Devuan example)
`sudo apt-get install gcc-arm-none-eabi` `sudo apt-get install gcc-arm-none-eabi`
NOTE: Check your tools are up-to-date to prevent errors like the lack of option _"-mgeneral-regs-only"_.
* OPTION 2: Proportioned by odroid Name of "_CROSS_COMPILE_" variable will change depending on the choosen option. This guide assumes cross-compile tools are from Linaro and therefore will equal to "_CROSS\_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu-_"
```
wget http://odroid.in/guides/ubuntu-lfs/arm-unknown-linux-gnueabi.tar.xz
tar -Jxf arm-unknown-linux-gnueabi.tar.xz
```
Name of "_CROSS_COMPILE_" variable will change depending on the choosen option. This guide assumes from repository and therefore will equal to "_CROSS\_COMPILE=arm-none-eabi-_"
## PARTITIONING ## PARTITIONING
@ -80,7 +81,7 @@ Minimum 3072 bytes free at the start of the drive and before the boot partition.
``` ```
git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01 git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01
cd u-boot cd u-boot
make ARCH=arm64 CROSS_COMPILE=arm-none-eabi- odroidc2_defconfig make ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- odroidc2_defconfig
make -j4 make -j4
cd boot cd boot
``` ```
@ -122,12 +123,12 @@ Must be FAT32 and 64 MB minimum.
`cd odroidc2-kernel-folder` `cd odroidc2-kernel-folder`
* OPTION 1: Make kernel config (oneliner) * OPTION 1: Make kernel config (oneliner)
`make ARCH=arm64 CROSS_COMPILE=arm-none-eabi- odroidc2_defconfig` `make ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- odroidc2_defconfig`
* OPTION 2: Make kernel config * OPTION 2: Make kernel config
``` ```
export ARCH=arm64 export ARCH=arm64
export CROSS_COMPILE=arm-none-eabi- export CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu-
make odroidc2_defconfig make odroidc2_defconfig
``` ```
@ -137,20 +138,24 @@ make odroidc2_defconfig
## COMPILING KERNEL ## COMPILING KERNEL
* Compiling devicetree blobs to destination "INSTALL_DTBS_PATH=/mnt/boot/dtbs/meson64_odroidc2.dtb" * Compiling devicetree blobs to destination "INSTALL_DTBS_PATH=/mnt/boot/dtbs/meson64_odroidc2.dtb"
`make -j 4 ARCH=arm64 CROSS_COMPILE=arm-none-eabi- INSTALL_DTBS_PATH=/mnt/boot/dtbs/ dtbs` `make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_DTBS_PATH=/mnt/boot/dtbs/ dtbs`
* Compiling kernel to destination "INSTALL_PATH=/mnt/boot/Image" * Compiling kernel to destination "INSTALL_PATH=/mnt/boot/Image"
`make -j 4 ARCH=arm64 CROSS_COMPILE=arm-none-eabi- INSTALL_PATH=/mnt/boot/ Image` `make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_PATH=/mnt/boot/ Image`
* Compiling the modules to destination "INSTALL_MOD_PATH=/mnt/" * Compiling the modules to destination "INSTALL_MOD_PATH=/mnt/"
`make -j 4 ARCH=arm64 CROSS_COMPILE=arm-none-eabi- INSTALL_MOD_PATH=/mnt/ modules_install` `make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_MOD_PATH=/mnt/ modules`
* Installing the modules to destination "INSTALL_MOD_PATH=/mnt/"
`make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_MOD_PATH=/mnt/ modules_install`
* Compiling firmware to destination "INSTALL_FW_PATH=/mnt/lib/firmware/" * Compiling firmware to destination "INSTALL_FW_PATH=/mnt/lib/firmware/"
`make -j 4 ARCH=arm64 CROSS_COMPILE=arm-none-eabi- INSTALL_FW_PATH=/mnt/lib/firmware/ firmware_install` `make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_FW_PATH=/mnt/lib/firmware/ firmware_install`
* Compiling kernel C headers to destination "INSTALL_HDR_PATH=/mnt/usr/" * Compiling kernel C headers to destination "INSTALL_HDR_PATH=/mnt/usr/"
`make -j 4 ARCH=arm64 CROSS_COMPILE=arm-none-eabi- INSTALL_HDR_PATH=/mnt/usr/ headers_install` `make -j 4 ARCH=arm64 CROSS_COMPILE=<LINARO\_TOOLS\_DIRECTORY>/bin/aarch64-linux-gnu- INSTALL_HDR_PATH=/mnt/usr/ headers_install`
## ROOT PARTITION ## ROOT PARTITION
Can be the rest of the disk. Can be the rest of the disk.
* Go to root directory
`cd /mnt/`
* Download CRUX image * 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 * Extract CRUX image