Can't compile code --please help

[DragonOsman]

I tried to compile the app I have on this GitHub repository to WebAssembly using em++, but I couldn't. I used this command:

em++ -std=c++17 -Wall -pedantic -D variant_CONFIG_SELECT_VARIANT=variant_VARIANT_NONSTD -s WASM=1 -s DISABLE_EXCEPTION_CATCHING=0 -I C:/Jinja2Cpp/install_x64/include -I C:/json/single_include -I C:/boost_1_68_0/ -c currency_converter.cpp -L C:/Jinja2Cpp/install_x64/lib/static -ljinja2cpp -L C:/boost_1_68_0/lib64-msvc-14.1 -lboost_system -lpthread -o currency_converter.js

And I had these warnings from em++:

WARNING:root:emcc: cannot find library "jinja2cpp"

and

WARNING:root:object c:\users\osman\appdata\local\temp\emscripten_temp_stn0tz_archive_contents\error_code.o is not LLVM bitcode, cannot link

What am I doing wrong? What do I need to do? Please help. Thanks in advance.

[DragonOsman]

Okay, I managed to do it with this command:

em++ -std=c++17 -Wall -pedantic -D variant_CONFIG_SELECT_VARIANT=variant_VARIANT_NONSTD -s WASM=1 -s DISABLE_EXCEPTION_CATCHING=0 -I C:/Jinja2Cpp/install_x64/include -I C:/json/single_include -I C:/boost_1_68_0/ -c currency_converter.cpp -L C:/Jinja2Cpp/install_x64/lib/static/jinja2cpp.lib -L C:/boost_1_68_0/lib64-msvc-14.1/libboost_system-vc141-mt-x64-1_68.lib -lpthread -o currency_converter.js

Now I just require the currency_converter.js file in a Node app?

Edit: I got a .js file, but not a .wasm file. Even though I provided the -s WASM=1 compiler flag on the command line. Why?

Edit: It could be because I have to give special treatment to std::shared_ptr when trying to compile to WebAssembly. I'll have to read again about how to do that.

Also, if I want to pass API keys as environment variables to use in my WebAssembly application, and I want to use it as a Node.js module, should I use ENV in my Node.js code like this?

Module.preRun.push(function() {ENV.my_key = "value"})

[DragonOsman]

I really can't generate the .wasm file no matter what I try. Someone please help. Thanks.

[juj]

Not sure, that looks like a project specific issue. This repository is about an Emscripten SDK bootstrapper script, so try raising the issue over at Emscripten tracker, or emscripten-discuss mailing list, if someone might have experience there.