    % scons
    scons: Reading SConscript files ...
    { 'BUILDERS': { '_InternalInstall': <function InstallBuilderWrapper at 0x700000>,
                    '_InternalInstallAs': <function InstallAsBuilderWrapper at 0x700000>,
                    '_InternalInstallVersionedLib': <function InstallVersionedBuilderWrapper at 0x700000>},
      'CONFIGUREDIR': '#/.sconf_temp',
      'CONFIGURELOG': '#/config.log',
      'CPPSUFFIXES': [ '.c',
                       '.C',
                       '.cxx',
                       '.cpp',
                       '.c++',
                       '.cc',
                       '.h',
                       '.H',
                       '.hxx',
                       '.hpp',
                       '.hh',
                       '.F',
                       '.fpp',
                       '.FPP',
                       '.m',
                       '.mm',
                       '.S',
                       '.spp',
                       '.SPP',
                       '.sx'],
      'DSUFFIXES': ['.d'],
      'Dir': <SCons.Defaults.Variable_Method_Caller object at 0x700000>,
      'Dirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000>,
      'ENV': {'PATH': '/usr/local/bin:/opt/bin:/bin:/usr/bin:/snap/bin'},
      'ESCAPE': <function escape at 0x700000>,
      'File': <SCons.Defaults.Variable_Method_Caller object at 0x700000>,
      'HOST_ARCH': 'arm64',
      'HOST_OS': 'posix',
      'IDLSUFFIXES': ['.idl', '.IDL'],
      'INSTALL': <function copyFunc at 0x700000>,
      'INSTALLVERSIONEDLIB': <function copyFuncVersionedLib at 0x700000>,
      'LIBPREFIX': 'lib',
      'LIBPREFIXES': ['$LIBPREFIX'],
      'LIBSUFFIX': '.a',
      'LIBSUFFIXES': ['$LIBSUFFIX', '$SHLIBSUFFIX'],
      'MAXLINELENGTH': 128072,
      'OBJPREFIX': '',
      'OBJSUFFIX': '.o',
      'PLATFORM': 'posix',
      'PROGPREFIX': '',
      'PROGSUFFIX': '',
      'PSPAWN': <function piped_env_spawn at 0x700000>,
      'RDirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000>,
      'SCANNERS': [<SCons.Scanner.ScannerBase object at 0x700000>],
      'SHELL': 'sh',
      'SHLIBPREFIX': '$LIBPREFIX',
      'SHLIBSUFFIX': '.so',
      'SHOBJPREFIX': '$OBJPREFIX',
      'SHOBJSUFFIX': '$OBJSUFFIX',
      'SPAWN': <function subprocess_spawn at 0x700000>,
      'TARGET_ARCH': None,
      'TARGET_OS': None,
      'TEMPFILE': <class 'SCons.Platform.TempFileMunge'>,
      'TEMPFILEARGESCFUNC': <function quote_spaces at 0x700000>,
      'TEMPFILEARGJOIN': ' ',
      'TEMPFILEPREFIX': '@',
      'TOOLS': ['install', 'install'],
      '_CPPDEFFLAGS': '${_defines(CPPDEFPREFIX, CPPDEFINES, CPPDEFSUFFIX, __env__, '
                      'TARGET, SOURCE)}',
      '_CPPINCFLAGS': '${_concat(INCPREFIX, CPPPATH, INCSUFFIX, __env__, RDirs, '
                      'TARGET, SOURCE, affect_signature=False)}',
      '_LIBDIRFLAGS': '${_concat(LIBDIRPREFIX, LIBPATH, LIBDIRSUFFIX, __env__, '
                      'RDirs, TARGET, SOURCE, affect_signature=False)}',
      '_LIBFLAGS': '${_concat(LIBLINKPREFIX, LIBS, LIBLINKSUFFIX, __env__)}',
      '__DRPATH': '$_DRPATH',
      '__DSHLIBVERSIONFLAGS': '${__libversionflags(__env__,"DSHLIBVERSION","_DSHLIBVERSIONFLAGS")}',
      '__LDMODULEVERSIONFLAGS': '${__libversionflags(__env__,"LDMODULEVERSION","_LDMODULEVERSIONFLAGS")}',
      '__RPATH': '$_RPATH',
      '__SHLIBVERSIONFLAGS': '${__libversionflags(__env__,"SHLIBVERSION","_SHLIBVERSIONFLAGS")}',
      '__lib_either_version_flag': <function __lib_either_version_flag at 0x700000>,
      '__libversionflags': <function __libversionflags at 0x700000>,
      '_concat': <function _concat at 0x700000>,
      '_defines': <function _defines at 0x700000>,
      '_stripixes': <function _stripixes at 0x700000>}
    scons: done reading SConscript files.
    scons: Building targets ...
    scons: `.' is up to date.
    scons: done building targets.