Compiling BitCode to WASM HTML5

FMOD Engine
1

I’m getting an error when trying to compile FMOD Studio BitCode to WASM

  • Using latest 2.02.20 HTML5 Package
  • Using files from api\studio\lib\fastcomp\bitcode
  • Running the command referenced in the documents

emcc -v

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.52 (fa478400df3351f7153c0279bc638784d3d90334)
clang version 18.0.0git (https://github.com/llvm/llvm-project 0a3a0ea5914cb4633f4f4c14f1ddc46ce067061a)
Target: wasm32-unknown-emscripten
Thread model: posix

Error Message

emcc --bind -Os -s EXPORT_NAME="'FMODModule'" -s MODULARIZE=1 -s FORCE_FILESYSTEM=1 -s EXTRA_EXPORTED_RUNTIME_METHODS="['cwrap','setValue','getValue']" -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -o fmodstudio.js fmodstudio.bc fmodstudio_bindings.bc
warning: overriding the module target triple with wasm32-unknown-emscripten [-Woverride-module]
1 warning generated.
warning: overriding the module target triple with wasm32-unknown-emscripten [-Woverride-module]
1 warning generated.
emcc: warning: EXTRA_EXPORTED_RUNTIME_METHODS is deprecated, please use EXPORTED_RUNTIME_METHODS instead [-Wdeprecated]
wasm-ld: warning: function signature mismatch: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED2Ev
>>> defined as (i32) -> void in /tmp/emscripten_temp_i0uzwob_/fmodstudio_bindings_1.o
>>> defined as (i32) -> i32 in /home/USERNAME/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libc++-noexcept.a(string.o)

wasm-ld: error: /tmp/emscripten_temp_i0uzwob_/fmodstudio_bindings_1.o: undefined symbol: std::__2::__vector_base_common<true>::__throw_length_error() const
wasm-ld: error: /tmp/emscripten_temp_i0uzwob_/fmodstudio_bindings_1.o: undefined symbol: std::__2::__vector_base_common<true>::__throw_length_error() const
wasm-ld: error: /tmp/emscripten_temp_i0uzwob_/fmodstudio_bindings_1.o: undefined symbol: std::__2::__vector_base_common<true>::__throw_length_error() const
wasm-ld: error: /tmp/emscripten_temp_i0uzwob_/fmodstudio_bindings_1.o: undefined symbol: std::__2::__vector_base_common<true>::__throw_length_error() const

Wondering if anyone could help?

3

Hi,

Thank you for all the information. Unfortunately, 3.1.52 no longer supports fast comp.

Could you please elaborate on why you are building fmodstudio.js yourself rather than using our provided build? We may be able to find an alternative solution.