Building rmf_utils with clang on workflow

  Starting >>> rmf_utils
  --- output: rmf_utils
  [0.014s] Not searching for unused variables given on the command line.
  [2.198s] -- The C compiler identification is Clang 10.0.0
  [2.355s] -- The CXX compiler identification is Clang 10.0.0
  [2.371s] -- Detecting C compiler ABI info
  [2.454s] -- Detecting C compiler ABI info - done
  [2.465s] -- Check for working C compiler: /usr/bin/clang - skipped
  [2.466s] -- Detecting C compile features
  [2.468s] -- Detecting C compile features - done
  [2.475s] -- Detecting CXX compiler ABI info
  [2.568s] -- Detecting CXX compiler ABI info - done
  [2.578s] -- Check for working CXX compiler: /usr/bin/clang++ - skipped
  [2.579s] -- Detecting CXX compile features
  [2.580s] -- Detecting CXX compile features - done
  [2.619s] -- Found PythonInterp: /usr/bin/python3 (found suitable version "3.8.5", minimum required is "3") 
  [2.619s] -- Using PYTHON_EXECUTABLE: /usr/bin/python3
  [2.821s] -- Configuring done
  [2.825s] -- Generating done
  [2.827s] -- Build files have been written to: /home/runner/work/rmf_utils/rmf_utils/ros_ws/build/rmf_utils
  [2.853s] [ 25%] Building CXX object CMakeFiles/test_rmf_utils.dir/test/main.cpp.o
  [2.855s] [ 50%] Building CXX object CMakeFiles/test_rmf_utils.dir/test/unit/TestClass.cpp.o
  [3.470s] /home/runner/work/rmf_utils/rmf_utils/ros_ws/src/7w0ooqarxi7/rmf_utils/rmf_utils/test/unit/TestClass.cpp:31:15: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'
  [3.470s]   std::string _test_text;
  [3.470s]               ^
  [3.470s] /usr/lib/llvm-10/bin/../include/c++/v1/iosfwd:209:32: note: template is declared here
  [3.470s]     class _LIBCPP_TEMPLATE_VIS basic_string;
  [3.470s]                                ^
  [3.471s] /home/runner/work/rmf_utils/rmf_utils/ros_ws/src/7w0ooqarxi7/rmf_utils/rmf_utils/test/unit/TestClass.cpp:42:24: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'
  [3.471s] std::string TestClass::get_test_text() const
  [3.471s]                        ^
  [3.471s] /usr/lib/llvm-10/bin/../include/c++/v1/iosfwd:209:32: note: template is declared here
  [3.471s]     class _LIBCPP_TEMPLATE_VIS basic_string;
  [3.471s]                                ^
  [3.478s] 2 errors generated.
  [3.481s] make[2]: *** [CMakeFiles/test_rmf_utils.dir/build.make:90: CMakeFiles/test_rmf_utils.dir/test/unit/TestClass.cpp.o] Error 1
  [3.481s] make[2]: *** Waiting for unfinished jobs....
  [10.574s] make[1]: *** [CMakeFiles/Makefile2:111: CMakeFiles/test_rmf_utils.dir/all] Error 2
  [10.575s] make: *** [Makefile:146: all] Error 2
  ---
  /usr/local/lib/python3.8/dist-packages/colcon_cmake/task/cmake/build.py:172: UserWarning: colcon_core.task.check_call() has been deprecated, use colcon_core.task.run() instead
    return await check_call(
  /usr/local/lib/python3.8/dist-packages/colcon_cmake/task/cmake/build.py:238: UserWarning: colcon_core.task.check_call() has been deprecated, use colcon_core.task.run() instead
    rc = await check_call(
  /usr/local/lib/python3.8/dist-packages/colcon_cmake/task/cmake/build.py:342: UserWarning: colcon_core.task.check_call() has been deprecated, use colcon_core.task.run() instead
    return await check_call(
  --- stderr: rmf_utils
  /home/runner/work/rmf_utils/rmf_utils/ros_ws/src/7w0ooqarxi7/rmf_utils/rmf_utils/test/unit/TestClass.cpp:31:15: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'
    std::string _test_text;
                ^
  /usr/lib/llvm-10/bin/../include/c++/v1/iosfwd:209:32: note: template is declared here
      class _LIBCPP_TEMPLATE_VIS basic_string;
                                 ^
  /home/runner/work/rmf_utils/rmf_utils/ros_ws/src/7w0ooqarxi7/rmf_utils/rmf_utils/test/unit/TestClass.cpp:42:24: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'
  std::string TestClass::get_test_text() const
                         ^
  /usr/lib/llvm-10/bin/../include/c++/v1/iosfwd:209:32: note: template is declared here
      class _LIBCPP_TEMPLATE_VIS basic_string;
                                 ^
  2 errors generated.
  make[2]: *** [CMakeFiles/test_rmf_utils.dir/build.make:90: CMakeFiles/test_rmf_utils.dir/test/unit/TestClass.cpp.o] Error 1
  make[2]: *** Waiting for unfinished jobs....
  make[1]: *** [CMakeFiles/Makefile2:111: CMakeFiles/test_rmf_utils.dir/all] Error 2
  make: *** [Makefile:146: all] Error 2
  ---
  Failed   <<< rmf_utils	[ Exited with code 2 ]
  
  Summary: 2 packages finished [11.7s]
    1 package failed: rmf_utils
    1 package had stderr output: rmf_utils
Error: The process '/usr/bin/bash' failed with exit code 2