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| This step also takes some time, because it's building an entire operating system. When your build finishes, it's time to flash it onto an SD card for your RPi. | | This step also takes some time, because it's building an entire operating system. When your build finishes, it's time to flash it onto an SD card for your RPi. |
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| == Build Kernel ==
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| It's planned to add the kernel building process to the b2g build system, but for now, you have to do it yourself.
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| === Prepare Toolchain ===
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| We need to cross compiling to kernel for the Raspberry Pi, for this we need the correct toolchain. Clone the toolchain repository in a folder you will remember:
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| git clone https://github.com/raspberrypi/tools
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| Then add the directory of the repo you have cloned to the '''path''' in you system.
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| === Compile from source ===
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| The kernel is copied in ''kernel/raspberrypi/rpi2b''. Knowing this follow the steps.
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| 1. Go inside B2G directory and kernel directory
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| kernel/raspberrypi/rpi2b
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| 2. Merge configurations into '''.config''' to build the kernel
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| ARCH=arm scripts/kconfig/merge_config.sh arch/arm/configs/bcm2709_defconfig android/configs/android-base.cfg android/configs/android-recommended.cfg
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| 3. Build the zImage
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| ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make zImage
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| 4. Build the dtb file
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| ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make dtbs
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| The two files that are generated and you need to boot the Raspberry PI B+ 2 are located in:
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| kernel/raspberrypi/rpi2b/arch/arm/boot/zImage
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| kernel/raspberrypi/rpi2b/arch/arm/boot/dts/bcm2709-rpi-2-b.dtb
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| == Prepare To Flash == | | == Prepare To Flash == |