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    Retropie 4.x on Odroid C2

    Scheduled Pinned Locked Moved Ideas and Development
    odroidbuild
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    • BuZzB
      BuZz administrators @roleo
      last edited by

      @roleo https://retropie.org.uk/donate/

      I have sent an email to Hardkernel to see if they would be interested in providing any development boards (as it would benefit them too). If not I will buy an ODroid-C2 to start with.

      To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

      1 Reply Last reply Reply Quote 0
      • roleoR
        roleo
        last edited by roleo

        Update.
        I compiled also lr-fbalpha adding the following section to makefile.libretro:

        else ifeq ($(platform), armv8)
            TARGET := $(TARGET_NAME)_libretro.so
            fpic := -fPIC
            SHARED := -shared -Wl,-no-undefined -Wl,--version-script=$(LIBRETRO_DIR)
            PLATFORM_DEFINES += -march=armv8-a+crc -mcpu=cortex-a53 -ffast-math
            HAVE_NEON = 1
            ENDIANNESS_DEFINES := -DLSB_FIRST
            CFLAGS += -DARM
        

        However I can not compile lr-imame4all.

        1 Reply Last reply Reply Quote 0
        • roleoR
          roleo
          last edited by

          Update.
          lr-fceumm ok without problems.
          lr-nestopia ok without problems.
          lr-snes9x2010 ok adding the following section to Makefile.libretro:

          # ARMv8
          else ifneq (,$(findstring armv8,$(platform)))
          	EXT    ?= so
          	TARGET := $(TARGET_NAME)_libretro.$(EXT)
          	SHARED := -shared -Wl,--no-undefined
          	fpic := -fPIC
          	CC   ?= gcc
          	CFLAGS += -march=armv8-a+crc -mcpu=cortex-a53 -DARM
          	ASFLAGS += -mcpu=cortex-a53
          

          lr-imame4all compiles but doesn't work.
          No chances with reicast: too asm parts...

          BuZzB 1 Reply Last reply Reply Quote 0
          • BuZzB
            BuZz administrators @roleo
            last edited by BuZz

            @roleo I have been generously offered an ODroid-C2 for free from Hardkernel so I will look into adding official support once it arrives. Thanks for your code feedback etc.

            To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

            roleoR D 2 Replies Last reply Reply Quote 1
            • roleoR
              roleo @BuZz
              last edited by

              @BuZz
              Good news!
              I hope I can help you.

              1 Reply Last reply Reply Quote 0
              • roleoR
                roleo
                last edited by

                Update.
                Finally I compiled the lr-imame4all. I encountered two problems:
                1 - The libco (src/libretro/libretro-common/libco) gives an error at runtime: "longjmp causes uninitialized stack frame", so I had to use the ucontext.c part instead of sjlj.c modifying libco.c (could be a performance issue).
                2 - The file src/libretro/osinline.h contains some asm code that I tried to patch (sorry but I'm not an asm programmer :) ).

                This is the code I used for the lr-imame4all.sh script:

                function sources_lr-imame4all() {
                    gitPullOrClone "$md_build" https://github.com/libretro/mame2000-libretro.git
                    sed -i 's/#include "sjlj.c"/#include "ucontext.c"/g' src/libretro/libretro-common/libco/libco.c
                    sed -i 's/#include <retro_inline.h>/#include <retro_inline.h>\n#include <stdint.h>/g' src/libretro/osinline.h
                    sed -i 's/    int res_hi, res_lo;/    int64_t res;/g' src/libretro/osinline.h
                    sed -i 's/("smull\\t%1,%0,%2,%3"/("smull\\t%x0,%w1,%w2"/g' src/libretro/osinline.h
                    sed -i 's/: "=r"(res_hi), "=r"(res_lo)/: "=r"(res)/g' src/libretro/osinline.h
                    sed -i 's/return res_hi;/return res>>32;/g' src/libretro/osinline.h
                    sed -i 's/( " mov %2, %2, asr #1 \\n"/( " asr %2, %2, #1 \\n"/g' src/libretro/osinline.h
                }
                
                1 Reply Last reply Reply Quote 0
                • M
                  mphil906
                  last edited by mphil906

                  Hello,

                  I was able to compile emulationstation on my C2 successfully, but I get the following error when trying to run it:

                  lvl0:   Error initializing SDL!
                          Failed to connect to the Mir Server
                  lvl0:   Renderer failed to initialize!
                  lvl0:   Window failed to intialize!
                  

                  This error occurs if lightdm is stopped or running. Any ideas? I'm new so go easy on me.

                  roleoR 1 Reply Last reply Reply Quote 0
                  • roleoR
                    roleo @mphil906
                    last edited by

                    @mphil906
                    During the build, the script has also built and installed libsdl mali-2.04?
                    Which libsdl2 packages are installed? You should have:

                    odroid@odroid64:~$ dpkg --list | grep sdl2
                    ii  libsdl2-2.0-0:arm64                   2.0.4+4mali                                   arm64        Simple DirectMedia Layer
                    hi  libsdl2-dev:arm64                     2.0.4+4mali                                   arm64        Simple DirectMedia Layer development files
                    

                    from this source:
                    https://github.com/RetroPie/SDL-mirror/tree/mali-2.0.4
                    and not the original ones of ubuntu.

                    M B 2 Replies Last reply Reply Quote 0
                    • M
                      mphil906 @roleo
                      last edited by

                      @roleo
                      Thank you for the reply, I was able to compile emulationstation succesfully. Indeed, the default Ubuntu sdl was installed. I cloned the original posters repository. I'm not entirely sure if this was the issue, but in the function platform_odroid-c2() {...} __platform_flags did not contain mali. This is what I used:

                      function platform_odroid-c2() {
                          __default_cflags="-O3 -march=armv8-a+crc -mtune=cortex-a53 -funsafe-math-optimizations"
                          __default_asflags=""
                          __default_makeflags="-j2"
                          __platform_flags="armv8 neon mali" #added mali flag
                          __qemu_cpu=cortex-a9
                          __has_binaries=0
                      }
                      

                      Not sure if this was the issue, but it compiles and runs. Thanks! Now attempting to compile retroarch.

                      roleoR ShakzS 2 Replies Last reply Reply Quote 0
                      • BuZzB
                        BuZz administrators
                        last edited by

                        Just to note - I have a board now and will be looking at adding basic support as free time permits (ES + retroarch etc first).

                        To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

                        1 Reply Last reply Reply Quote 1
                        • roleoR
                          roleo @mphil906
                          last edited by

                          @mphil906
                          I think this was the issue.

                          @BuZz
                          Great!
                          Thank you.

                          1 Reply Last reply Reply Quote 0
                          • ShakzS
                            Shakz @mphil906
                            last edited by

                            @mphil906
                            See now I was just about to give up on this...dang...lemmie drag the darn thing out and give it another shot!
                            Thanks for posting!

                            RetroPie tips, tricks, and tweaks: https://www.youtube.com/eazyhax

                            1 Reply Last reply Reply Quote 0
                            • roleoR
                              roleo
                              last edited by roleo

                              With the last changes of the EmulationStation github I have a new problem during the configure phase:

                              cmake . -DFREETYPE_INCLUDE_DIRS=/usr/include/freetype2/
                              

                              The cmake didn't find the vlc library.

                              CMake Error at CMake/Packages/FindVLC.cmake:33 (macro_ensure_version):
                                MACRO_ENSURE_VERSION Macro invoked with incorrect arguments for macro
                                named: MACRO_ENSURE_VERSION
                              Call Stack (most recent call first):
                                CMakeLists.txt:51 (find_package)
                              

                              --- EDIT ---

                              Sorry, my mistake.
                              The libvlc-dev was missing.

                              1 Reply Last reply Reply Quote 0
                              • BuZzB
                                BuZz administrators
                                last edited by

                                I am currently working on odroid-c2 support - not trying to put you off working on it, but in case you don't want to duplicate efforts etc.

                                To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

                                1 Reply Last reply Reply Quote 0
                                • roleoR
                                  roleo
                                  last edited by

                                  Apart reicast, I compiled everything I needed but I will continue to work on it for personal pleasure.
                                  If I can help ...

                                  Thanks for your support.

                                  BuZzB 1 Reply Last reply Reply Quote 0
                                  • BuZzB
                                    BuZz administrators @roleo
                                    last edited by BuZz

                                    @roleo Thanks.

                                    Are you using the 16.04 aarch64 Ubuntu ? I was wondering as you are targetting aarch32 right ? Are you using an aarch32 targetted gcc ?

                                    I was planning on targetting aarch64.

                                    [edit] actually maybe I just misread - you will likely want to remove the "neon" platform flag though though if you have it as that's all aarch32 neon stuff which I don't think will work on aarch64 (without changes).

                                    To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

                                    roleoR 1 Reply Last reply Reply Quote 0
                                    • roleoR
                                      roleo @BuZz
                                      last edited by roleo

                                      @BuZz
                                      aarch64

                                      odroid@odroid64:~$ uname -a
                                      Linux odroid64 3.14.79-89 #1 SMP PREEMPT Thu Oct 13 08:42:27 BRT 2016 aarch64 aarch64 aarch64 GNU/Linux
                                      odroid@odroid64:~$ gcc -v
                                      Using built-in specs.
                                      COLLECT_GCC=gcc
                                      COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/5/lto-wrapper
                                      Target: aarch64-linux-gnu
                                      Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-arm64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-arm64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-arm64 --with-arch-directory=aarch64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu
                                      Thread model: posix
                                      gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4)
                                      

                                      --- EDIT ---

                                      I had forgotten. At a later time, I removed neon flag because the gcc doesn't support it.

                                      function platform_odroid-c2() {
                                          __default_cflags="-O3 -march=armv8-a+crc -mtune=cortex-a53 -funsafe-math-opt
                                          __default_asflags=""
                                          __default_makeflags="-j2"
                                      #    __platform_flags="arm armv8 neon mali"
                                          __platform_flags="arm armv8 mali"
                                          __qemu_cpu=cortex-a9
                                          __has_binaries=0
                                      }
                                      

                                      As far as I know neon is mandatory for arm64, so no command line flag is needed.

                                      1 Reply Last reply Reply Quote 0
                                      • F
                                        flag
                                        last edited by

                                        I've an odroidc2 board too, if there's an image to test.

                                        1 Reply Last reply Reply Quote 0
                                        • roleoR
                                          roleo
                                          last edited by

                                          Hi BuzZ.
                                          When I scroll up/down the game list (for example in MAME menu) I can see a strange screen flickerig due to the chars printed on the back (on the terminal I think).
                                          Is this a known problem? Is there a solution?
                                          This doesn't happen in raspberry image.

                                          BuZzB 1 Reply Last reply Reply Quote 0
                                          • BuZzB
                                            BuZz administrators @roleo
                                            last edited by BuZz

                                            @roleo to do with the sdl2 driver I guess. Will look into it.

                                            To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

                                            1 Reply Last reply Reply Quote 0
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