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    Retropie 4.x on Odroid C2

    Scheduled Pinned Locked Moved Ideas and Development
    odroidbuild
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    • 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
                                          • D
                                            detron @BuZz
                                            last edited by

                                            @BuZz

                                            that is great! actually, had I known you needed one to try to get RetroPie support, I would have put some money towards getting you one.

                                            I have an ODroid C2, and would LOVE to see RetroPie using that hardware. thank you Buzz and Hardkernel.

                                            1 Reply Last reply Reply Quote 0
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