README-raspberrypi.txt
changeset 7806 03e6aaea8347
parent 7778 a571a9947869
child 7808 627f256b0e56
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7805:4f0f7b64afa5 7806:03e6aaea8347
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    24 
    25 You also need the VideoCore binary stuff that ships in /opt/vc for EGL and 
    25 You also need the VideoCore binary stuff that ships in /opt/vc for EGL and 
    26 OpenGL ES 2.x, it usually comes pre installed, but in any case:
    26 OpenGL ES 2.x, it usually comes pre installed, but in any case:
    27     
    27     
    28 sudo apt-get install libraspberrypi0 libraspberrypi-bin libraspberrypi-dev
    28 sudo apt-get install libraspberrypi0 libraspberrypi-bin libraspberrypi-dev
       
    29 
       
    30 ================================================================================
       
    31  Cross compiling from x86 Linux
       
    32 ================================================================================
       
    33 
       
    34 To cross compile SDL for Raspbian from your desktop machine, you'll need a
       
    35 Raspbian system root and the cross compilation tools. We'll assume these tools
       
    36 will be placed in /opt/rpi-tools
       
    37 
       
    38     sudo git clone --depth 1 https://github.com/raspberrypi/tools /opt/rpi-tools
       
    39 
       
    40 You'll also need a Rasbian binary image.
       
    41 Get it from: http://downloads.raspberrypi.org/raspbian_latest 
       
    42 After unzipping, you'll get file with a name like: <date>-wheezy-raspbian.img
       
    43 Let's assume the sysroot will be built in /opt/rpi-sysroot.
       
    44 
       
    45     export SYSROOT=/opt/rpi-sysroot
       
    46     sudo kpartx -a -v <path_to_raspbian_image>.img
       
    47     sudo mount -o loop /dev/mapper/loop0p2 /mnt
       
    48     sudo cp -r /mnt $SYSROOT
       
    49     sudo apt-get install qemu binfmt-support qemu-user-static
       
    50     sudo cp /usr/bin/qemu-arm-static $SYSROOT/usr/bin
       
    51     sudo mount --bind /dev $SYSROOT/dev
       
    52     sudo mount --bind /proc $SYSROOT/proc
       
    53     sudo mount --bind /sys $SYSROOT/sys
       
    54 
       
    55 Now, before chrooting into the ARM sysroot, you'll need to apply a workaround,
       
    56 edit $SYSROOT/etc/ld.so.preload and comment out all lines in it.
       
    57 
       
    58     sudo chroot $SYSROOT
       
    59     apt-get install libudev-dev libasound2-dev libdbus-1-dev libraspberrypi0 libraspberrypi-bin libraspberrypi-dev libx11-dev libxext-dev libxrandr-dev libxcursor-dev libxi-dev libxinerama-dev libxxf86vm-dev libxss-dev
       
    60     exit
       
    61     sudo umount $SYSROOT/dev
       
    62     sudo umount $SYSROOT/proc
       
    63     sudo umount $SYSROOT/sys
       
    64     sudo umount /mnt
       
    65 
       
    66 The final step is compiling SDL itself.
       
    67 
       
    68     export CC="/opt/rpi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc --sysroot=$SYSROOT -I$SYSROOT/opt/vc/include -I$SYSROOT/usr/include -I$SYSROOT/opt/vc/include/interface/vcos/pthreads -I$SYSROOT/opt/vc/include/interface/vmcs_host/linux"
       
    69     cd <SDL SOURCE>
       
    70     mkdir -p build;cd build
       
    71     ../configure --with-sysroot=$SYSROOT --host=arm-raspberry-linux-gnueabihf --prefix=$PWD/rpi-sdl2-installed --disable-pulseaudio --disable-esd
       
    72 
       
    73 ================================================================================
       
    74  Apps don't work or poor video/audio performance
       
    75 ================================================================================
       
    76 
       
    77 If you get sound problems, buffer underruns, etc, run "sudo rpi-update" to 
       
    78 update the RPi's firmware. Note that doing so will fix these problems, but it
       
    79 will also render the CMA - Dynamic Memory Split functionality useless.
       
    80 
       
    81 Also, by default the Raspbian distro configures the GPU RAM at 64MB, this is too
       
    82 low in general, specially if a 1080p TV is hooked up.
       
    83 
       
    84 See here how to configure this setting: http://elinux.org/RPiconfig
       
    85 
       
    86 Using a fixed gpu_mem=128 is the best option (specially if you updated the 
       
    87 firmware, using CMA probably won't work, at least it's the current case).
    29 
    88 
    30 ================================================================================
    89 ================================================================================
    31  No input
    90  No input
    32 ================================================================================
    91 ================================================================================
    33 
    92 
    81 
   140 
    82 ================================================================================
   141 ================================================================================
    83  Notes
   142  Notes
    84 ================================================================================
   143 ================================================================================
    85 
   144 
    86 * Building has only been tested natively (i.e. not cross compiled). Cross
   145 * Input events from the keyboard leak through to the console
    87   compilation might work though, feedback is welcome!
   146