PCSX-ReARMed on ODROID-U2 (through RetroArch)

These notes are useful to get PCSX-ReARMed (by notaz) running on an ODROID-U2, with full ARM optimizations.

Due to some bug in the current configure/Makefiles, you will not be able to compile&run it succesffully. I got errors like this:

RetroArch [ERROR] :: dylib_load() failed: "pcsx_rearmed_libretro.so: undefined symbol: gteNCLIP_arm".
RetroArch [ERROR] :: Failed to open dynamic library: "pcsx_rearmed_libretro.so"
RetroArch [ERROR] :: Fatal error received in: "load_dynamic()"

And this:

RetroArch [ERROR] :: dylib_load() failed: "pcsx_rearmed_libretro.so: undefined symbol: gteRTPT_neon".
RetroArch [ERROR] :: Failed to open dynamic library: "pcsx_rearmed_libretro.so"
RetroArch [ERROR] :: Fatal error received in: "load_dynamic()"

 
So here you are some instructions to get it running.
First thing, get the libretro port:

git clone https://github.com/libretro/pcsx_rearmed

Apply this patch:

diff --git a/Makefile b/Makefile
index a472492..ed95702 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,9 @@ CXXFLAGS += $(CFLAGS)
 #DRC_DBG = 1
 #PCNT = 1

+ARCH = arm
+HAVE_NEON=1
+
 all: config.mak target_ plugins_

 ifndef NO_CONFIG_MAK
diff --git a/Makefile.libretro b/Makefile.libretro
index 9436c8a..8a0d67a 100644
--- a/Makefile.libretro
+++ b/Makefile.libretro
@@ -97,8 +97,6 @@ else ifeq ($(platform), arm)
    DRC_CACHE_BASE = 0
    BUILTIN_GPU = neon
    ARCH = arm
-   CFLAGS += -marm -mcpu=cortex-a8 -mfpu=neon
-   ASFLAGS += -mcpu=cortex-a8 -mfpu=neon
 else
    TARGET := $(TARGET_NAME)_retro.dll
    CC = gcc

Now you're (almost) set. Run this script:

export CFLAGS='-marm -mcpu=cortex-a9 -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard'
export CXXFLAGS='-marm -mcpu=cortex-a9 -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard'
export ASFLAGS='-marm -mcpu=cortex-a9 -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard'
./configure --enable-neon
make -j5 -f Makefile.libretro platform=arm

And enjoy PCSX-ReARMed on your ODROID :)

Issues

It is very slow! It's not performing very well, although all possible optimizations have been enabled. Update 26 June 2013: It's working very fast! Thanks to Squarepusher for the tip of using platform=arm :)

Furthermore, CSO/ISO are not working. Update 26 June 2013: I don't yet know how to work-around this, will publish a new post when I do