|
|
| (7 intermediate revisions by 4 users not shown) |
| Line 1: |
Line 1: |
| − | = Raspberry PI kernel compilation =
| + | #REDIRECT [[RPi Kernel Compilation]] |
| − | | + | |
| − | You can compile the kernel on the board itself, but you can also cross compile on a standard Linux machine (or maybe even on Windows machines?) .
| + | |
| − | | + | |
| − | The following documents my attempts at compiling the raspberry pi kernel.
| + | |
| − | | + | |
| − | == cross compiling ==
| + | |
| − | | + | |
| − | === getting the compiler ===
| + | |
| − | | + | |
| − | On Ubuntu Oneiric getting the arm cross compiler can be as easy as:
| + | |
| − | | + | |
| − | sudo apt-get install gcc-4.6-arm-linux-gnueabi
| + | |
| − | | + | |
| − | (TODO: Is this the right one? More packages required? I did this a while ago! TODO: Other distributions?)
| + | |
| − | | + | |
| − | === getting the sources ===
| + | |
| − | | + | |
| − | | + | |
| − | ==== using git ====
| + | |
| − | create a directory where you can work on the raspberry pi software. I called mine "raspberrypi". Then clone the git repository.
| + | |
| − | | + | |
| − | mkdir raspberrypi
| + | |
| − | cd raspberrypi
| + | |
| − | git clone https://github.com/raspberrypi/linux.git
| + | |
| − | cd linux
| + | |
| − | | + | |
| − | ==== using the patch ====
| + | |
| − | | + | |
| − | TODO: write this.
| + | |
| − | | + | |
| − | | + | |
| − | === compiling ===
| + | |
| − | | + | |
| − | Next you have to configure the kernel.
| + | |
| − | make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- oldconfig
| + | |
| − | | + | |
| − | This will ask the least amount of questions. I selected processor "6" (the first (only?) broadcom processor I saw). '''Someone at rapsberrypi foundation should publish a proper config'''.
| + | |
| − | | + | |
| − | Then building the kernel:
| + | |
| − | make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- -k
| + | |
| − | | + | |
| − | At the moment (Jan 22nd, 2012) there is an undeclared function and some undeclared variables in arch/arm/mach-bcmring/dma.c , and a whole bunch of mach/gpio.h not found errors.
| + | |
| − | | + | |
| − | You can add "-j 3" to improve compilation speed if you have enough RAM and 2 cores. Use "-j 5" if you have 4 cores. (I recommend one more than the number of cores, to allow a bit of overlapping CPU operations with IO)
| + | |
| − | | + | |
| − | | + | |
| − | == on the Raspberry pi itself ==
| + | |
| − | | + | |
| − | Get the sources just like above.
| + | |
| − | | + | |
| − | TODO: write the rest of this section.
| + | |
