WASM: build fails for Emscripten 3.1.45+

[yzakharchuk]

I'm building oneTBB on Emscripten 3.1.45 as described in #1207 and getting the following error:

$ emcmake cmake -DCMAKE_CXX_COMPILER=em++ -DCMAKE_C_COMPILER=emcc -DTBB_STRICT=OFF -DCMAKE_CXX_FLAGS=-Wno-unused-command-line-argument -DTBB_DISABLE_HWLOC_AUTOMATIC_SEARCH=ON -DBUILD_SHARED_LIBS=ON -DTBB_EXAMPLES=ON -DTBB_TEST=ON ../oneTBB/
...

$ cmake --build . -j 8
[  0%] Building CXX object src/tbbmalloc/CMakeFiles/tbbmalloc.dir/backend.cpp.o
[  1%] Building CXX object test/CMakeFiles/test_handle_perror.dir/tbb/test_handle_perror.cpp.o
[  1%] Building CXX object examples/parallel_for/polygon_overlay/gui/CMakeFiles/UI_LIB_polygon_overlay.dir/convideo.cpp.o
[  1%] Building CXX object examples/parallel_for/tachyon/gui/CMakeFiles/UI_LIB_tachyon.dir/convideo.cpp.o
[  2%] Building CXX object examples/parallel_for/seismic/gui/CMakeFiles/UI_LIB_seismic.dir/convideo.cpp.o
[  2%] Building CXX object test/CMakeFiles/test_malloc_whitebox.dir/tbbmalloc/test_malloc_whitebox.cpp.o
[  3%] Building CXX object src/tbb/CMakeFiles/tbb.dir/address_waiter.cpp.o
[  3%] Building CXX object examples/task_arena/fractal/gui/CMakeFiles/UI_LIB_fractal.dir/convideo.cpp.o
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -Dtest_handle_perror_EXPORTS -I/home/yurii/oneTBB/test/.. -I/home/yurii/oneTBB/test -I/home/yurii/oneTBB/src/tbb/../../include -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -Wall -Wextra -Wshadow -Wcast-qual -Woverloaded-virtual -Wnon-virtual-dtor -ffp-model=precise -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -pthread -MD -MT test/CMakeFiles/test_handle_perror.dir/tbb/test_handle_perror.cpp.o -MF CMakeFiles/test_handle_perror.dir/tbb/test_handle_perror.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/test/tbb/test_handle_perror.cpp -o CMakeFiles/test_handle_perror.dir/tbb/test_handle_perror.cpp.o' failed (returned 1)
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fvisibility=default -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -D__TBB_BUILD -D__TBB_RESUMABLE_TASKS_USE_THREADS=1 -D__TBB_USE_ITT_NOTIFY -I/home/yurii/oneTBB/src/tbb/../../include -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -flto=thin -Wall -Wextra -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -pthread -MD -MT src/tbb/CMakeFiles/tbb.dir/address_waiter.cpp.o -MF CMakeFiles/tbb.dir/address_waiter.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/src/tbb/address_waiter.cpp -o CMakeFiles/tbb.dir/address_waiter.cpp.o' failed (returned 1)
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fvisibility=default -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -D__TBBMALLOC_BUILD -D__TBB_USE_ITT_NOTIFY -I/home/yurii/oneTBB/src/tbbmalloc/../../include -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -flto=thin -Wall -Wextra -fno-rtti -fno-exceptions -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -pthread -MD -MT src/tbbmalloc/CMakeFiles/tbbmalloc.dir/backend.cpp.o -MF CMakeFiles/tbbmalloc.dir/backend.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/src/tbbmalloc/backend.cpp -o CMakeFiles/tbbmalloc.dir/backend.cpp.o' failed (returned 1)
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -D__TBBMALLOC_BUILD -I/home/yurii/oneTBB/test/../include -I/home/yurii/oneTBB/test/.. -I/home/yurii/oneTBB/test -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -ffp-model=precise -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -fno-rtti -fno-exceptions -pthread -MD -MT test/CMakeFiles/test_malloc_whitebox.dir/tbbmalloc/test_malloc_whitebox.cpp.o -MF CMakeFiles/test_malloc_whitebox.dir/tbbmalloc/test_malloc_whitebox.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/test/tbbmalloc/test_malloc_whitebox.cpp -o CMakeFiles/test_malloc_whitebox.dir/tbbmalloc/test_malloc_whitebox.cpp.o' failed (returned 1)
gmake[2]: *** [src/tbbmalloc/CMakeFiles/tbbmalloc.dir/build.make:77: src/tbbmalloc/CMakeFiles/tbbmalloc.dir/backend.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:979: src/tbbmalloc/CMakeFiles/tbbmalloc.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
gmake[2]: *** [test/CMakeFiles/test_handle_perror.dir/build.make:77: test/CMakeFiles/test_handle_perror.dir/tbb/test_handle_perror.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:2799: test/CMakeFiles/test_handle_perror.dir/all] Error 2
gmake[2]: *** [src/tbb/CMakeFiles/tbb.dir/build.make:77: src/tbb/CMakeFiles/tbb.dir/address_waiter.cpp.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
[  3%] Building CXX object src/tbb/CMakeFiles/tbb.dir/allocator.cpp.o
[  3%] Building CXX object src/tbb/CMakeFiles/tbb.dir/arena.cpp.o
gmake[2]: *** [test/CMakeFiles/test_malloc_whitebox.dir/build.make:77: test/CMakeFiles/test_malloc_whitebox.dir/tbbmalloc/test_malloc_whitebox.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:4151: test/CMakeFiles/test_malloc_whitebox.dir/all] Error 2
[  3%] Linking CXX static library ../../../../clang_18.0_cxx11_32_relwithdebinfo/libUI_LIB_fractal.a
[  3%] Linking CXX static library ../../../../clang_18.0_cxx11_32_relwithdebinfo/libUI_LIB_seismic.a
[  3%] Linking CXX static library ../../../../clang_18.0_cxx11_32_relwithdebinfo/libUI_LIB_tachyon.a
[  3%] Linking CXX static library ../../../../clang_18.0_cxx11_32_relwithdebinfo/libUI_LIB_polygon_overlay.a
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fvisibility=default -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -D__TBB_BUILD -D__TBB_RESUMABLE_TASKS_USE_THREADS=1 -D__TBB_USE_ITT_NOTIFY -I/home/yurii/oneTBB/src/tbb/../../include -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -flto=thin -Wall -Wextra -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -pthread -MD -MT src/tbb/CMakeFiles/tbb.dir/arena.cpp.o -MF CMakeFiles/tbb.dir/arena.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/src/tbb/arena.cpp -o CMakeFiles/tbb.dir/arena.cpp.o' failed (returned 1)
clang++: error: unsupported option '-mrtm' for target 'wasm32-unknown-emscripten'
clang++: error: unsupported option '-mwaitpkg' for target 'wasm32-unknown-emscripten'
gmake[2]: *** [src/tbb/CMakeFiles/tbb.dir/build.make:107: src/tbb/CMakeFiles/tbb.dir/arena.cpp.o] Error 1
em++: error: '/home/yurii/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fvisibility=default -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN --sysroot=/home/yurii/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -D__TBB_BUILD -D__TBB_RESUMABLE_TASKS_USE_THREADS=1 -D__TBB_USE_ITT_NOTIFY -I/home/yurii/oneTBB/src/tbb/../../include -Wno-unused-command-line-argument -O2 -g3 -DNDEBUG -std=c++11 -flto=thin -Wall -Wextra -fexceptions -mrtm -mwaitpkg -Wformat -Wformat-security -Werror=format-security -fPIC -D_FORTIFY_SOURCE=2 -pthread -MD -MT src/tbb/CMakeFiles/tbb.dir/allocator.cpp.o -MF CMakeFiles/tbb.dir/allocator.cpp.o.d -c -matomics -mbulk-memory /home/yurii/oneTBB/src/tbb/allocator.cpp -o CMakeFiles/tbb.dir/allocator.cpp.o' failed (returned 1)
gmake[2]: *** [src/tbb/CMakeFiles/tbb.dir/build.make:92: src/tbb/CMakeFiles/tbb.dir/allocator.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:953: src/tbb/CMakeFiles/tbb.dir/all] Error 2
[  3%] Built target UI_LIB_fractal
[  3%] Built target UI_LIB_seismic
[  3%] Built target UI_LIB_polygon_overlay
[  3%] Built target UI_LIB_tachyon
gmake: *** [Makefile:166: all] Error 2

All works fine for Emscripten 3.1.44 where unsupported options cause warnings that are suppressed with -Wno-unused-command-line-argument. I assume Emscripten 3.1.45+ uses clang 18 which treats unsupported options '-mrtm' and '-mwaitpkg' as an error.

[pavelkumbrasev]

@JhaShweta1 Could you please taka a look?