% scons scons: Reading SConscript files ... { 'BUILDERS': {'_InternalInstall': <function InstallBuilderWrapper at 0x700000&gt;, '_InternalInstallVersionedLib': <function InstallVersionedBuilderWrapper at 0x700000&gt;, '_InternalInstallAs': <function InstallAsBuilderWrapper at 0x700000&gt;}, '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&gt;, 'Dirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'ENV': { 'PATH': '/usr/local/bin:/opt/bin:/bin:/usr/bin'}, 'ESCAPE': <function escape at 0x700000&gt;, 'File': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'HOST_ARCH': None, 'HOST_OS': None, 'IDLSUFFIXES': ['.idl', '.IDL'], 'INSTALL': <function copyFunc at 0x700000&gt;, 'INSTALLVERSIONEDLIB': <function copyFuncVersionedLib at 0x700000&gt;, 'LIBPREFIX': 'lib', 'LIBPREFIXES': ['$LIBPREFIX'], 'LIBSUFFIX': '.a', 'LIBSUFFIXES': ['$LIBSUFFIX', '$SHLIBSUFFIX'], 'MAXLINELENGTH': 128072, 'OBJPREFIX': '', 'OBJSUFFIX': '.o', 'PLATFORM': 'posix', 'PROGPREFIX': '', 'PROGSUFFIX': '', 'PSPAWN': <function piped_env_spawn at 0x700000&gt;, 'RDirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'SCANNERS': [<SCons.Scanner.Base object at 0x700000&gt;], 'SHELL': 'sh', 'SHLIBPREFIX': '$LIBPREFIX', 'SHLIBSUFFIX': '.so', 'SHOBJPREFIX': '$OBJPREFIX', 'SHOBJSUFFIX': '$OBJSUFFIX', 'SPAWN': <function subprocess_spawn at 0x700000&gt;, 'TARGET_ARCH': None, 'TARGET_OS': None, 'TEMPFILE': <class 'SCons.Platform.TempFileMunge'>, 'TEMPFILEARGJOIN': ' ', 'TEMPFILEPREFIX': '@', 'TOOLS': ['install', 'install'], '_CPPDEFFLAGS': '${_defines(CPPDEFPREFIX, CPPDEFINES, CPPDEFSUFFIX, __env__)}', '_CPPINCFLAGS': '$( ${_concat(INCPREFIX, CPPPATH, INCSUFFIX, __env__, RDirs, TARGET, SOURCE)} $)', '_LIBDIRFLAGS': '$( ${_concat(LIBDIRPREFIX, LIBPATH, LIBDIRSUFFIX, __env__, RDirs, TARGET, SOURCE)} $)', '_LIBFLAGS': '${_concat(LIBLINKPREFIX, LIBS, LIBLINKSUFFIX, __env__)}', '__DRPATH': '$_DRPATH', '__DSHLIBVERSIONFLAGS': '${__libversionflags(__env__,"DSHLIBVERSION","_DSHLIBVERSIONFLAGS")}', '__LDMODULEVERSIONFLAGS': '${__libversionflags(__env__,"LDMODULEVERSION","_LDMODULEVERSIONFLAGS")}', '__RPATH': '$_RPATH', '__SHLIBVERSIONFLAGS': '${__libversionflags(__env__,"SHLIBVERSION","_SHLIBVERSIONFLAGS")}', '__libversionflags': <function __libversionflags at 0x700000&gt;, '_concat': <function _concat at 0x700000&gt;, '_defines': <function _defines at 0x700000&gt;, '_stripixes': <function _stripixes at 0x700000&gt;} scons: done reading SConscript files. scons: Building targets ... scons: `.' is up to date. scons: done building targets.