Enabling C++ linkage for Emscripten compilation

Question

EDIT: the linkage is for the #include directives for the .h files. I figured out that the error occurs when the same #include statements is declared twice in different .cpp files.

I m trying to use Emscripten to compile my c++ project codes, but keeping getting "File not found" error when including headers in VS Code.

I m using WSL 2 Ubuntu Distro.

I noticed the error occurs when the same include statement is declared before.

I used this code below to compile my codes but to avail:

emcc -o testnpsi.html OtBinMain.cpp -O3 -s WASM=1 --shell-file emscripten_enabler/shell_minimal.html -s NO_EXIT_RUNTIME=1 -s "EXTRA_EXPORTED_RUNTIME_METHODS=['ccall']"

I have been stuck with this for the past few months trying to compile this using Emscripten.

`/mnt/c/Users/DELL USER/OneDrive/Desktop/MultipartyPSI-190723/testnpsi$ emcc -o testnpsi.html main.cpp -O3 -s WASM=1 --shell-file emscripten_enabler/shell_minimal.html -s NO_EXIT_RUNT
IME=1 -s "EXTRA_EXPORTED_RUNTIME_METHODS=['ccall']"
main.cpp:3:10: fatal error: 'Network/BtChannel.h' file not found
    3 | #include "Network/BtChannel.h"
      |          ^~~~~~~~~~~~~~~~~~~~~
1 error generated.`