emscan-deps can't find port headers

[Diyou]

Related to #24454 with #24506 emscan-deps can't find the port headers probably because it's not invoking the setup steps that emcc would've done in a later step.

[build] "/mnt/e/Workspace/SDLTemplate/.cache/emsdk/upstream/emscripten/emscan-deps" -format=p1689 -- /mnt/e/Workspace/SDLTemplate/.cache/emsdk/upstream/emscripten/em++ -DPROJECT_ID=\"dev.sdl.hello\" -DPROJECT_NAME=\"HelloSDL\" -DPROJECT_VERSION=\"0.0.1\"  -stdlib=libc++  -stdlib=libc++  -g -std=gnu++23 -fPIE -sUSE_SDL=3 -x c++ /mnt/e/Workspace/SDLTemplate/Source/App.ixx -c -o CMakeFiles/HelloSDL.dir/Source/App.ixx.o -MT CMakeFiles/HelloSDL.dir/Source/App.ixx.o.ddi -MD -MF CMakeFiles/HelloSDL.dir/Source/App.ixx.o.ddi.d > CMakeFiles/HelloSDL.dir/Source/App.ixx.o.ddi.tmp && mv CMakeFiles/HelloSDL.dir/Source/App.ixx.o.ddi.tmp CMakeFiles/HelloSDL.dir/Source/App.ixx.o.ddi
[build] Error while scanning dependencies for /mnt/e/Workspace/SDLTemplate/Source/App.ixx:
[build] /mnt/e/Workspace/SDLTemplate/Source/App.ixx:6:10: fatal error: 'SDL3/SDL.h' file not found

[Diyou]

In short term this can probably be worked around in cmake by using try_compile.

[sbc100]

Is SDL3/SDL.h installed at the time when emscan-deps is run?

Does ./embuilder build sdl3 fix the issue?

Are you suggesting that emscan-deps should install ports on demand like emcc does? I suppose it would make some sense to match the behaviour?

[sbc100]

If ./embuilder build sdl3 fixes the issue then I would suggest that short term fix would be to add that command to you build process (just after you install emsdk).

[Diyou]

Are you suggesting that emscan-deps should install ports on demand like emcc does? I suppose it would make some sense to match the behaviour?

Yeah that would be great.
When running ./embuilder build sdl3 beforehand It passes.

[sbc100]

i would recommend using ./embuilder build sdl3 even if we do fix emscan-deps. Using embuilder to build libraries that you need before running the compiler seems like a most reliable and robust way to go.