Hi,
i tried hello world with emcc but i have problem with this:

Name           : emscripten
Version        : 2.0.3_1
Installed on   : Wed Mar 23 16:24:11 2022 CET
Origin         : devel/emscripten
Architecture   : FreeBSD:12:*
Prefix         : /usr/local
Categories     : devel www
Licenses       : MIT, NCSA
Maintainer     : yuri@FreeBSD.org
WWW            : https://emscripten.org/
Comment        : LLVM-to-Web Compiler


emcc main.cpp 
emcc: warning: LLVM version appears incorrect (seeing "15.0", expected "12.0") [-Wversion-check]
cache:INFO: generating system library: libc.a... (this will be cached in "/home/maxfx/.emscripten_cache/wasm/libc.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libcompiler_rt.a... (this will be cached in "/home/maxfx/.emscripten_cache/wasm/libcompiler_rt.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libc++-noexcept.a... (this will be cached in "/home/maxfx/.emscripten_cache/wasm/libc++-noexcept.a" for subsequent builds)
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:174:57: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
                                                __root_(move(other.__root_)),
                                                        ^
                                                        std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:175:58: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
                                                __entry_(move(other.__entry_)) {
                                                         ^
                                                         std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:257:17: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
    path root = move(__imp_->__root_);
                ^
                std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:291:25: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
  __imp_->__stack_.push(move(new_s));
                        ^
                        std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:345:17: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
    path root = move(stack.top().__root_);
                ^
                std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:379:29: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
      __imp_->__stack_.push(move(new_it));
                            ^
                            std::
/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp:390:21: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
      path at_ent = move(curr_it.__entry_.__p_);
                    ^
                    std::
7 errors generated.
em++: error: '/usr/local/bin/clang++-devel -target wasm32-unknown-emscripten -D__EMSCRIPTEN_major__=2 -D__EMSCRIPTEN_minor__=0 -D__EMSCRIPTEN_tiny__=2 -D_LIBCPP_ABI_VERSION=2 -Dunix -D__unix -D__unix__ -Werror=implicit-function-declaration -Xclang -nostdsysteminc -Xclang -isystem/usr/local/lib/emscripten/system/include/libcxx -Xclang -isystem/usr/local/lib/emscripten/system/lib/libcxxabi/include -Xclang -isystem/usr/local/lib/emscripten/system/include/compat -Xclang -isystem/usr/local/lib/emscripten/system/include -Xclang -isystem/usr/local/lib/emscripten/system/include/libc -Xclang -isystem/usr/local/lib/emscripten/system/lib/libc/musl/arch/emscripten -Xclang -isystem/usr/local/lib/emscripten/system/local/include -Xclang -isystem/usr/local/lib/emscripten/system/include/SSE -Xclang -isystem/usr/local/lib/emscripten/system/include/neon -Xclang -isystem/usr/local/lib/emscripten/system/lib/compiler-rt/include -Xclang -isystem/usr/local/lib/emscripten/system/lib/libunwind/include -Xclang -isystem/home/maxfx/.emscripten_cache/wasm/include -DEMSCRIPTEN -fignore-exceptions -fno-inline-functions -Werror -DLIBCXX_BUILDING_LIBCXXABI=1 -D_LIBCPP_BUILDING_LIBRARY -Oz -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -fno-exceptions -c -o /tmp/emscripten_temp_f6ncafi7/directory_iterator.o /usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp -Xclang -isystem/usr/local/lib/emscripten/system/include/SDL -c -o /tmp/emscripten_temp_f6ncafi7/directory_iterator.o -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr' failed (1)
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 80, in run_one_command
    shared.run_process(cmd, stdout=stdout, stderr=stderr, env=safe_env)
  File "/usr/local/lib/emscripten/tools/shared.py", line 205, in run_process
    ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
  File "/usr/local/lib/python3.8/subprocess.py", line 516, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/usr/local/lib/emscripten/em++', '-Werror', '-DLIBCXX_BUILDING_LIBCXXABI=1', '-D_LIBCPP_BUILDING_LIBRARY', '-Oz', '-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS', '-fno-exceptions', '-c', '/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp', '-o', '/tmp/emscripten_temp_f6ncafi7/directory_iterator.o', '-Wno-deprecated']' returned non-zero exit status 1.
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/emscripten/emcc.py", line 3250, in <module>
    sys.exit(run(sys.argv))
  File "/usr/local/lib/emscripten/emcc.py", line 2053, in run
    extra_files_to_link += system_libs.calculate([f for _, f in sorted(temp_files)] + extra_files_to_link, in_temp, link_as_cxx, forced=forced_stdlibs)
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 1567, in calculate
    add_library(system_libs_map['libc++'])
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 1507, in add_library
    libs_to_link.append((lib.get_path(), need_whole_archive))
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 334, in get_path
    return shared.Cache.get(self.get_filename(), self.build)
  File "/usr/local/lib/emscripten/tools/cache.py", line 127, in get
    temp = creator()
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 381, in build
    create_lib(out_filename, self.build_objects())
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 375, in build_objects
    run_build_commands(commands)
  File "/usr/local/lib/emscripten/tools/system_libs.py", line 94, in run_build_commands
    pool.map_async(run_one_command, commands, chunksize=1).get(999999)
  File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 771, in get
    raise self._value
subprocess.CalledProcessError: Command '['/usr/local/lib/emscripten/em++', '-Werror', '-DLIBCXX_BUILDING_LIBCXXABI=1', '-D_LIBCPP_BUILDING_LIBRARY', '-Oz', '-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS', '-fno-exceptions', '-c', '/usr/local/lib/emscripten/system/lib/libcxx/filesystem/directory_iterator.cpp', '-o', '/tmp/emscripten_temp_f6ncafi7/directory_iterator.o', '-Wno-deprecated']' returned non-zero exit status 1.