Missing entry method in VST2 plugin

[sc3sc3]

Since awhile I cannot load the vst files anymore, they don't appear in Ardour nor in Bitwig.

Ardour info scanning:
_[Info]: Scanning: /home/sn/.vst/CardinalFX.vst/CardinalFX.so
[ERROR]: Missing entry method in VST2 plugin '/home/sn/.vst/CardinalFX.vst/CardinalFX.so'
[WARNING]: Cannot open VST2 module '/home/sn/.vst/CardinalFX.vst/CardinalFX.so'
Scan Failed.

[Info]: Scanning: /home/sn/.vst/CardinalSynth.vst/CardinalSynth.so
[ERROR]: Missing entry method in VST2 plugin '/home/sn/.vst/CardinalSynth.vst/CardinalSynth.so'
[WARNING]: Cannot open VST2 module '/home/sn/.vst/CardinalSynth.vst/CardinalSynth.so'
Scan Failed.

[Info]: Scanning: /home/sn/.vst/Cardinal.vst/Cardinal.so
[WARNING]: Cannot open VST2 module '/home/sn/.vst/Cardinal.vst/Cardinal.so'
Scan Failed._

If I remember correctly this started happening around the time Cardinal got renamed to CardinalFX

[sc3sc3]

Also vst3 and lv2 are not recognized by Ardour.

I'm on UbuntuStudio LTS 20.04

[falkTX]

delete those files and do a full rebuild. this is 99% sure an issue with your build or setup.

[sc3sc3]

I haven't been building the plugins myself, I have always used Github builds, provided under the Actions tab.

[falkTX]

Oh, interesting. I havent tried those in a while. Nevermind my last comment then, obviously invalid.

One thing that I did change was bumping from Ubuntu 18.04 base to 20.04 base.
But since you run 20.04 yourself, this should not be the problem.
So, dont know what is going on yet. If you find something please post about it.

[sc3sc3]

I got the project building succesfully, but at the end there is no bin folder.
What are the commands to build the actual vst, vst3, lv2 files?
Thanks

[sc3sc3]

Apparently I do get an error:

Compiling src/ApplicationPrivateData.cpp
In file included from src/ApplicationPrivateData.cpp:20:
src/pugl.hpp:44:10: fatal error: pugl-upstream/include/pugl/pugl.h: No such file or directory
44 | #include "pugl-upstream/include/pugl/pugl.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
connected.
make[1]: *** [Makefile:169: ../build/dgl/ApplicationPrivateData.cpp.o] Error 1

[falkTX]

you need submodules

[falkTX]

anyhow I think I found the reason why.
latest commit about CardinalFX should fix it, but you need to remove Cardinal.vst which does nothing and is not possible in VST2

[sc3sc3]

concerning the submodules, I get the pugl issue with the following

git clone https://github.com/DISTRHO/Cardinal.git
cd Cardinal
git submodule init
git submodule sync
git submodule update
make WITH_LTO=true -j6

[sc3sc3]

I tried the latest Actions build, and unfortunately the issue is still there: Missing entry method in VST2 plugin

[falkTX]

Yes I can reproduce that here, investigating.
Also, LTO takes a really long time, I dont recommend it for testing builds yourself.
For submodules you need to apply it recursively, aka git submodule update --init --recursive

[sc3sc3]

Thank you, I got the project fully built now.
Weirdly, my own built CardinalFX/CardinalSynth vst2 plugins aren't recognized either.

The standalone applications Cardinal, CardinalFX and CardinalSynth in bin folder work correctly.

[falkTX]

It is likely related to LTO.
Since you had a partial LTO build, the compiler likely tried to do a full LTO build in the end. Try make clean and building again without LTO.

[sc3sc3]

With clean build:

• lv2 works correctly in Ardour
• vst2 is not seen in Ardour, nor Bitwig
• vst3 loads but does not contain any modules to use

[falkTX]

Issue was the -fwhole-program that doesnt work with GCC for plugins.