Mogwai crashes on Ubuntu 22.04 due to missing slang files

[Latios96]

I tried to build and run Falcor on Ubuntu 22.04, but for some reasons Mogwai is crashing due to missing slang files.

These are the steps I followed:

sudo apt install xorg-dev libgtk-3-dev
./setup.sh
cmake --preset "linux-gcc"
cd build/linux-gcc
ninja
./bin/Debug/Mogwai --script /home/jan/workspace/Falcor/scripts/SceneDebugger.py --scene /home/jan/workspace/Falcor/media/test_scenes/mori_knob/knob.usd --verbosity=5

Mogwai then crashes because several slang files can not be found, for example:

/home/jan/workspace/Falcor/build/linux-gcc/bin/Debug/shaders/RenderPasses/SceneDebugger/SceneDebugger.cs.slang(33): error 1: cannot open file 'Utils/Geometry/IntersectionHelpers.slang'.

See the attached log.txt for the full output.

Did I miss one step? Do I need to setup some path so Mogwai can find the slang files?

Thanks in advance!

[belcour]

I did experiment the same problem on my side (using Ubuntu 22.04 LTS as well, with either master or v8.0 tag).
Its seems the error is also related to slang not looking in relative directories.

For example:

falcor/build/linux-gcc/bin/Debug/shaders/RenderPasses/SceneDebugger/SceneDebugger.cs.slang(38): error 1: cannot open file 'SharedTypes.slang'.

while SharedTypes.slang is in the same directory as SceneDebugger.cs.slang.

[JonasRock]

This is still a problem with the current master when built with the linux-gcc preset.

When executing build/linux-gcc/bin/Debug/Mogwai --verbosity=5 --script=scripts/MinimalPathTracer.py --scene=media/test_scenes/cornell_box.pyscene --logfile=log.txt I get (among other errors):

/home/jonas/repos/falcor/build/linux-gcc/bin/Debug/shaders/RenderPasses/GBuffer/VBuffer/VBufferRT.rt.slang(32): error 1: cannot open file 'VBufferRT.slang'.
import VBufferRT;
       ^~~~~~~~~

Loading scripts/scenes through the Mogwai UI leads to the same outcome.