Test with exporting for the web, Linux and windows a Godot project with GDNative C++ code.
Clone the project and its dependencies :
git clone https://github.com/Zouizoui78/godotcppweb
cd godotcppweb
git clone --recursive https://github.com/godotengine/godot-cpp -b 3.3
Apply patch to compile godot-cpp to wasm with optimization (added in godot-cpp's master branch but not in 3.3) :
cd godot-cpp
git apply ../godot-cpp_sconstruct.patch
cd ..
Build the project :
make linux
# OR for the web
make web
# OR for Windows
make win
# OR for all three
make
GDNative doesn't work with export templates for wasm provided by the Godot website. The templates provided here in export_templates/ are compiled with the correct parameters and work. To rebuild them run these commands :
git clone https://github.com/godotengine/godot.git -b 3.3.2-stable
# Optimize Godot build
cp custom.py godot/
# Debug build
scons platform=javascript tools=no gdnative_enabled=yes
#Release build
scons platform=javascript tools=no gdnative_enabled=yes target=release
# Rename the procuced files
mv bin/godot.javascript.opt.threads.zip bin/webassembly_threads_release.zip
mv bin/godot.javascript.opt.gdnative.zip bin/webassembly_gdnative_release.zip