Raspberry Pi Build please

[sionisaac]

Can this core be built for Raspberry Pi specifically retropie? I keep checking the nightly section but still now core updates for armhf.

[emptyinside666]

Same. Since argument "-m32" is disabled it keeps throwing a PTR64 flag error eventhough I set PTR64 ?= 0 at the top of the Makefile.libretro. This works amazing on my PC but getting Mess to run CDI on RPi4 is frustating to say the least.

[sionisaac]

I've got mame and mess working on my raspberry pi 400 and pi zero 2. I can run CDI games with mame and advanced mess. Having a standalone core would make setup less tedious.

[zach-morris]

I think this is out my league. Looking at other cores, I don't see any specific recipes for armhf that I can copy. This issue probably belongs in https://github.com/libretro/libretro-super

[sionisaac]

This sounds promising. Can you link to rpi compatible core if and when it goes live.

[zoltanvb]

Disclaimer: I am no libretro infrastructure maintainer, just someone who has spent some effort recently around this topic.

The armhf (and armv7-neon-hf) nightly builds are now not operational, images in there are close to 2 years old and new ones are not being built. So it won't appear there.
The nightly builds are not controlled by the recipes any more, instead by the .gitlab-ci.yml files, but there are no suitable rules for armhf (or aarch64) to add. at least not yet. So the best bet is still manual compilation.

[sionisaac]

Can anyone give instructions on how to build this core on a rpi 3 or 4?

[zach-morris]

I was able to compile on an RPi2 (32 bit, I unfortunately dont have a 3 or 4 so couldn't test 64 bit), using these instructions as a guide. 64 bit should be pretty much the same though. I have no idea how well this will actually run.

Requirements:

• Typical build stuff like make, gcc, git, etc
• Python > 3.5. I used:

>>python --version
Python 3.7.3

• Increase your swapfile size on the RPi, since compiling this requires RAM that the RPi doesn't have. Use the instructions at the link above. Reboot after the change.

Steps:

1. Build and install SDL2 first, using these instructions, or the helpful script from here. After install you should be able to:

>>sdl2-config --version
2.0.15

2. Get the same_cdi code:

cd ~/Documents/code (or wherever you want to put the source)
git clone https://github.com/libretro/same_cdi.git
cd same_cdi

3. Make (warning, this takes a looooong time, i just let it go overnight):

make -f Makefile.libretro PTR64=0

Thats it. If you wanted to do this for 64bit Raspian, the steps would be the same, except:

make -f Makefile.libretro PTR64=1

Attached is the 32 bit armhf compiled version.
same_cdi_libretro.zip

I would think this might be easier to request be added to Retropie or whatever flavor you're using, since they've probably got some cross-compiling build system already setup to handle this.