Debian Stretch(9) ROS2 build from source: Failed <<< tracetools_trace

edit

I’m aware that Debian is tier 3, and it’s not officially supported. I’m getting the following error when trying building from source Eloquent Release Patch 2 in Debian Stretch(9):

• Operating System: Debian Stretch(9)
• Installation type: From source
• Version or commit hash: ros2-eloquent Patch Release 2
• DDS implementation: Fast-RTPS

error:

~/ros2_eloquent$ colcon build --event-handlers console_direct+ --packages-select tracetools_trace
Starting >>> tracetools_trace
Traceback (most recent call last):trace - 0.2s]
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.5/distutils/core.py", line 216, in run_setup
    exec(f.read(), g, l)
  File "<string>", line 35
    f'trace = {package_name}.trace:main',
                                       ^
SyntaxError: invalid syntax
Traceback (most recent call last):             
  File "/usr/lib/python3/dist-packages/colcon_core/executor/__init__.py", line 91, in __call__
    rc = await self.task(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_core/task/__init__.py", line 93, in __call__
    return await task_method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_ros/task/ament_python/build.py", line 51, in build
    setup_py_data = get_setup_data(self.context.pkg, env)
  File "/usr/lib/python3/dist-packages/colcon_core/task/python/__init__.py", line 20, in get_setup_data
    return dict(pkg.metadata[key](env))
  File "/usr/lib/python3/dist-packages/colcon_ros/package_identification/ros.py", line 130, in getter
    desc.path / 'setup.py', env=env)
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 242, in get_setup_information
    setup_py, env=env)
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 283, in _get_setup_information
    cwd=os.path.abspath(str(setup_py.parent)), check=True, env=env)
  File "/usr/lib/python3.5/subprocess.py", line 398, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['/usr/bin/python3', '-c', "import sys;from setuptools.extern.packaging.specifiers import SpecifierSet;from distutils.core import run_setup;dist = run_setup(    'setup.py', script_args=('--dry-run',), stop_after='config');skip_keys = ('cmdclass', 'distclass', 'ext_modules', 'metadata');data = {    key: value for key, value in dist.__dict__.items()     if (        not key.startswith('_') and         not callable(value) and         key not in skip_keys and         key not in dist.display_option_names    )};data['metadata'] = {    k: v for k, v in dist.metadata.__dict__.items()     if k not in ('license_files', 'provides_extras')};sys.stdout.buffer.write(repr(data).encode('utf-8'))"]' returned non-zero exit status 1
--- stderr: tracetools_trace
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/executor/__init__.py", line 91, in __call__
    rc = await self.task(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_core/task/__init__.py", line 93, in __call__
    return await task_method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_ros/task/ament_python/build.py", line 51, in build
    setup_py_data = get_setup_data(self.context.pkg, env)
  File "/usr/lib/python3/dist-packages/colcon_core/task/python/__init__.py", line 20, in get_setup_data
    return dict(pkg.metadata[key](env))
  File "/usr/lib/python3/dist-packages/colcon_ros/package_identification/ros.py", line 130, in getter
    desc.path / 'setup.py', env=env)
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 242, in get_setup_information
    setup_py, env=env)
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 283, in _get_setup_information
    cwd=os.path.abspath(str(setup_py.parent)), check=True, env ...