Build with emscripten toolchain fails

[tibortakacs]

Environment:
Ubuntu 20.04 WSL2
Boost version: 1.79.0
Emscripten toolchain is downloaded as a nuget package and manually added to the PATH.

Issue:

I want to build boost test with emscripten toolchain. This is a b2 command that almost works:

./b2 --address-model=32 --layout=tagged --build-type=minimal --build-dir=./build --with-test threading=multi toolset=emscripten variant=release

However, I get this error:
... emcc: error: '/home/user/.nuget/packages/emscripten-2.0.26-ubuntu-2004-x64/1.0.3/build/native/emsdk/upstream/bin/wasm-ld -o build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/libboost_unit_test_framework-mt.so.1.79.0 -h build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/compiler_log_formatter.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/debug.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/decorator.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/execution_monitor.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/framework.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/plain_report_formatter.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/progress_monitor.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/results_collector.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/results_reporter.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/test_framework_init_observer.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/test_tools.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/test_tree.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/unit_test_log.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/unit_test_main.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/unit_test_monitor.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/unit_test_parameters.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/junit_log_formatter.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/xml_log_formatter.bc build/boost/bin.v2/libs/test/build/emscripten-2.0.26/release/threading-multi/visibility-hidden/xml_report_formatter.bc -Bstatic -Bdynamic -L/home/user/.nuget/packages/emscripten-2.0.26-ubuntu-2004-x64/1.0.3/build/native/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten --relocatable -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr' failed (returned 1) ...

As you can see, the building framework calls wasm-ld with -h ..., -Bstatic and -Bdynamic parameters which are not supported by wasm-ld. If I directly call the long command above after removing these parameters first, the command succeeds.

Is this expected? Should I modify the building framework to call wasm-ld with the correct parameters?