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    Retropie 4.x on Odroid C2

    Scheduled Pinned Locked Moved Ideas and Development
    odroidbuild
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    • P
      phoenix73
      last edited by

      new build complain about missing libsdl1.2-dev and libraspberrypi-dev ;/

      1 Reply Last reply Reply Quote 0
      • D
        detron
        last edited by

        thank you for your efforts to get RetroPie running on the Odroid C2 .

        I love Retropie, and I own a C2, and think the power it adds will be a great gaming system.

        P 2 Replies Last reply Reply Quote 0
        • P
          phoenix73 @detron
          last edited by

          @detron well I'm just trying to figure how to build it on C2, unsure if it will be easy or not.
          I posted also on Odroid Forum (http://forum.odroid.com/viewtopic.php?f=136&t=23889) to see if someone already tried to build it

          D 1 Reply Last reply Reply Quote 0
          • D
            detron @phoenix73
            last edited by

            @phoenix73

            I still appreciate knowing SOMEONE is trying. I do not have the right knowledge to try it myself.

            1 Reply Last reply Reply Quote 0
            • gizmo98G
              gizmo98 Global Moderator
              last edited by gizmo98

              I expect odroid C2 runs a full X11 environment. I would start from scratch and run RetroPie-Setup with sudo __platform=generic-x11 ./retropie_setup.sh and look what happens. Or add x11 to your __platform_flags.

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              • P
                phoenix73
                last edited by

                I'll have a look to this approach too :)

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                • P
                  phoenix73 @detron
                  last edited by

                  @detron libretro testing ppa (http://ppa.launchpad.net/libretro/testing/ubuntu/pool/) contains many packages for arm64, so it could be something to investigate too. I'll try to rebuild emulationstation deb on Odroid C2 too

                  D 1 Reply Last reply Reply Quote 0
                  • D
                    detron @phoenix73
                    last edited by

                    @phoenix73

                    thank you. I am very comfortable with linux, but I do not have a good understanding of what truly goes into retroarch and emulationstation setup.

                    good luck, and if you get anywhere, please let me know.

                    thank you again

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

                      Hi.
                      I'm trying to compile retropie using the system.sh proposed in the 1st post.
                      I started with emulationstation and I successfully compiled it.
                      Below my system:

                      • Odroid C2 rev 0.2
                      • Ubuntu standard image: ubuntu64-16.04lts-mate-odroid-c2-20161017

                      I followed the recommended procedure for ODROID C1 except for the last command:

                      sudo apt-get install -y git
                      git clone --depth=1 https://github.com/RetroPie/RetroPie-Setup.git
                      cd RetroPie-Setup
                      sudo __platform=odroid-c2 ./retropie_setup.sh
                      

                      I changed also the CMakeLists.txt with the correct libMali.so path.

                      #check if we're running on olinuxino
                      MESSAGE("Looking for libMali.so")
                      if(EXISTS "/usr/lib/aarch64-linux-gnu/libMali.so")
                          MESSAGE("libMali.so found")
                          set(GLSystem "OpenGL ES")
                      else()
                          MESSAGE("libMali.so not found")
                      endif()
                      

                      I stopped lightdm and when I run emulationstation I can see the correct graphic screen.

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                      • roleoR
                        roleo
                        last edited by roleo

                        Hi.
                        Second step.
                        I successfully compile retroarch and lr-mame2003.
                        For retroarch I used the following build_retroarch() in retroarch.sh:

                        function build_retroarch() {
                            local params=(--enable-sdl2)
                            ! isPlatform "x11" && params+=(--disable-x11 --enable-opengles --disable-ffmpeg --disable-sdl --enable-sdl2 --disable-oss --disable-pulse --disable-al --disable-jack)
                            isPlatform "rpi" && params+=(--enable-dispmanx)
                            isPlatform "mali" && params+=(--enable-mali_fbdev)
                            isPlatform "arm" && params+=(--enable-floathard)
                        #    isPlatform "neon" && params+=(--enable-neon)
                            isPlatform "armv8" && params+=(--disable-wayland --disable-vg --disable-miniupnpc)
                            ./configure --prefix="$md_inst" "${params[@]}"
                            sed -i 's/HAVE_OSS_LIB = 1/HAVE_OSS_LIB = 0/g' config.mk
                            sed -i 's/HAVE_VIDEOCORE = 1/HAVE_VIDEOCORE = 0/g' config.mk
                            sed -i 's/OPENGLES_LIBS = -lGLESv2 -lEGL -lGLESv2 -lbcm_host -lvcos -lvchiq_arm/OPENGLES_LIBS = -lGLESv2 -lEGL/g' config.mk
                            make clean
                            make
                            md_ret_require="$md_build/retroarch"
                        }
                        

                        And I patched
                        libretro-common/include/glsym/glsym_es2.h
                        adding:

                        #include <stdint.h>
                        

                        in the first line.

                        For lr-mame2003 the compilation has no problems.

                        I tried a few games and it works!

                        roleo

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

                          @roleo you shouldn't need to modify config.mk afterwards - the raspberry pi link libs/video core stuff should only be added if the raspberry pi dev libs are present on the system - which shouldn't be the case.

                          are you building to run on X or framebuffer ?

                          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
                            I know but if I don't modify the config.mk the compilation process doesn't complete.
                            And I didn't find an option to disable videocore from configure.
                            Similar for OSS: the compilation is ok but the linker search for -lossaudio.
                            Maybe I missed a parameter?

                            I'm building on framebuffer, X is stopped.

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                            • BuZzB
                              BuZz administrators
                              last edited by

                              I will look into getting an ODroid-c2 board.

                              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

                                @BuZz
                                Is there a donation link?
                                I think there are a lot of users interested.

                                BuZzB 1 Reply Last reply Reply Quote 0
                                • 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.

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                                    • 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
                                            }
                                            
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