emscripten toolset does not work

[jonathanpoelen]

Environment and version details

• Operating System+version: Manjaro Linux
• Compiler+version: emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 2.0.9
• Shell: zsh
• B2 Version: B2 Version 4.7. OS=LINUX. / B2 4.7-git

Brief problem description

Options not recognized by emscripten are injected and it does not compile.

Steps to reproduce the issue

$ cat Jamroot
project test : requirements : default-build release ;
exe test : test.cpp ;
$ b2 toolset=emscripten

Actual behavior summary

Compilation error:

$ b2 toolset=emscripten --debug-configuration
notice: found boost-build.jam at /usr/share/boost-build/src/kernel/boost-build.jam
notice: loading B2 from /usr/share/boost-build/src/kernel/bootstrap.jam
notice: Searching '/etc' '/home/jonathan' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/util' '/usr/share/boost-build/src/build' '/usr/share/boost-build/src/tools' '/usr/share/boost-build/src/contrib' '/usr/share/boost-build/src/.' for site-config configuration file 'site-config.jam'.
notice: Configuration file 'site-config.jam' not found in '/etc' '/home/jonathan' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/util' '/usr/share/boost-build/src/build' '/usr/share/boost-build/src/tools' '/usr/share/boost-build/src/contrib' '/usr/share/boost-build/src/.'.
notice: Searching '/home/jonathan' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/kernel' '/usr/share/boost-build/src/util' '/usr/share/boost-build/src/build' '/usr/share/boost-build/src/tools' '/usr/share/boost-build/src/contrib' '/usr/share/boost-build/src/.' for user-config configuration file 'user-config.jam'.
notice: Loading user-config configuration file 'user-config.jam' from '/home/jonathan'.
notice: will use 'g++' for gcc, condition <toolset>gcc-12
notice: using gcc libraries :: <toolset>gcc-12 :: /usr/bin /usr/lib /usr/lib32 /usr/lib64
notice: using gcc archiver :: <toolset>gcc-12 :: /usr/bin/ar
warning: toolset gcc initialization: can not find tool windres
warning: initialized from /home/jonathan/user-config.jam:6
notice: using rc compiler :: <toolset>gcc-12 :: /usr/bin/as
notice: will use 'clang++' for clang-linux, condition <toolset>clang-linux-13
notice: will use 'clang++' for clang-linux, condition <toolset>clang-linux-libc++
notice: [cmdline-cfg] toolset emscripten not previously configured; attempting to auto-configure now
notice: will use 'emcc' for emscripten, condition <toolset>emscripten-2.0.9
...found 7 targets...
...updating 1 target...
emscripten.link bin/emscripten-2.0.9/release/test.js
emcc:WARNING: --llvm-lto ignored when using llvm backend
wasm-ld: error: unknown argument: -Bstatic
wasm-ld: error: unknown argument: -Bdynamic
emcc: error: '/home/jonathan/game/emsdk/upstream/bin/wasm-ld -o bin/emscripten-2.0.9/release/test.wasm bin/emscripten-2.0.9/release/test.bc -Bstatic -Bdynamic -L/home/jonathan/game/emsdk/upstream/emscripten/system/local/lib -L/home/jonathan/game/emsdk/upstream/emscripten/system/lib -L/home/jonathan/game/emsdk/upstream/emscripten/cache/wasm /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libc.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libcompiler_rt.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libc++-noexcept.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libc++abi-noexcept.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libdlmalloc.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libpthread_stub.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libc_rt_wasm.a /home/jonathan/game/emsdk/upstream/emscripten/cache/wasm/libsockets.a -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --allow-undefined --import-memory --strip-debug --export-table --export main --export stackSave --export stackRestore --export stackAlloc --export __wasm_call_ctors --export __errno_location -z stack-size=5242880 --initial-memory=16777216 --no-entry --max-memory=16777216 --global-base=1024' failed (1)

    "emcc"   -o "bin/emscripten-2.0.9/release/test.js" "bin/emscripten-2.0.9/release/test.bc"  -Wl,--start-group -Wl,-Bstatic  -Wl,-Bdynamic  -Wl,--end-group -fPIC -O3 --llvm-lto 0 -g0

...failed emscripten.link bin/emscripten-2.0.9/release/test.js...
...failed updating 1 target...

Expected behavior summary

• -Wl,-Bstatic and -Wl,-Bdynamic block compilation and should not be used
• --llvm-lto does not exist anymore and should be replaced by -fno-lto / nothing, -flto and -flto=thin in emscripten.jam (link-optimization option)

[jonathanpoelen]

I just saw #111 who hasn't moved in 8 months.