Error while trying to add my plugin

[njsiva]

Hello, I finished developing my first plugin, and tested it well on mod-desktop. I attempted to install it on my modduox and can see it. All the meta-data appears in good order as the thumbnail looks good and the datapage on clicking the thumbnail also looks good. But when I drag it into the pedalboard area I get an “Error loading plugin message”. I ssh’ed into the box and see the following in journalctl -m.

Jan 01 01:53:53 modduox mod-jackd[428]: lilv_lib_open(): error: Failed to open library /root/.lv2/two-buttons.lv2/two-buttons.so (/root/.lv2/two-buttons.lv2/two-buttons.so: cannot open shared object file: No such file or directory)
Jan 01 01:53:53 modduox mod-jackd[428]: can't get lilv instance

However, I do see the .so file correctly installed when I list the directory. Any clues? Many thanks.

[root@modduox two-buttons.lv2]# ls -la
total 44
drwxr-xr-x   3 root root  4096 Jan  1 01:53 ./
drwxr-xr-x 165 root root 12288 Jan  1 01:53 ../
-rw-r--r--   1 root root   287 Jun  7  2024 manifest.ttl
drwxr-xr-x   3 root root  4096 Jan  1 01:53 modgui/
-rwxr-xr-x   1 root root 14488 Jun  7  2024 two-buttons.so*
-rw-r--r--   1 root root  2466 Jun  7  2024 two-buttons.ttl

[malfunction54]

MOD devices are all ARM-based. You’ll need to cross-compile to get it to run on your DuoX.

[njsiva]

Thanks. Looks like I have some more reading to do tomorrow. Much appreciate the quick response, @malfunction54

[Zavorra]

This answer from @falkTX should help on how to cross-compile

you may want to use moddwarf-new instead of moddwarf anyway

./bootstrap.sh moddwarf-new  minimal
...
source local.env moddwarf-new

instead of

./bootstrap.sh moddwarf minimal
...
source local.env moddwarf

(@falkTX could you confirm?)

Mod-sdk Package 'phantomjs' has no installation candidate

I dont know how it is for PD, but in general the approach is: # clone the plugin builder repo git clone https://github.com/moddevices/mod-plugin-builder/ cd mod-build-builder # build dwarf toolchain # remove "minimal" if you need 3rd party libs like libsndfile ./bootstrap.sh moddwarf minimal # setup current shell for building using the dwarf toolchain source local.env moddwarf # now you can build your plugin projects within this shell cd /path/to/my/plugin cmake -S . -B build make -C build #…

[falkTX]

@Zavorra

you may want to use moddwarf-new instead of moddwarf anyway

you can, but not strictly necessary.
the regular one has GCC7 while the “new” one has GCC9.
so the new one can support a bit more fancy C++ features.
for the case of PD/hvcc based plugins it doesn’t make a difference.

[njsiva]

Many thanks for your responses.
I did do the bootstrap step (with modduox) and used the platform parameter with the build step, but failed to do the local.env step. I will be giving that a shot later today. The other observation is that the build did not copy the modgui folder that I had to copy manually.

Thanks!

[njsiva]

I got my plugin working correctly. However, I see a flood of these messages in the logs:

Jan 01 02:00:04 modduox mod-jackd[9295]: sys_serial_write: failed, not enough space

This happens as soon as I call the HMI function to turn the LED on. The LED turns on, but this starts to get logged continuously. Any clues? Many thanks.

[falkTX]

are you calling it on every audio run? you should only call it once

[njsiva]

my boolean check was messed up making it call each run. My apologies. Thank you @falkTX .