C:\>scons scons: Reading SConscript files ... { 'BUILDERS': {'_InternalInstallVersionedLib': <function InstallVersionedBuilderWrapper at 0x700000&gt;, '_InternalInstall': <function InstallBuilderWrapper at 0x700000&gt;, 'Object': <SCons.Builder.CompositeBuilder object at 0x700000&gt;, 'PCH': <SCons.Builder.BuilderBase object at 0x700000&gt;, 'RES': <SCons.Builder.BuilderBase object at 0x700000&gt;, 'SharedObject': <SCons.Builder.CompositeBuilder object at 0x700000&gt;, 'StaticObject': <SCons.Builder.CompositeBuilder object at 0x700000&gt;, '_InternalInstallAs': <function InstallAsBuilderWrapper at 0x700000&gt;}, 'CC': 'cl', 'CCCOM': <SCons.Action.FunctionAction object at 0x700000&gt;, 'CCFLAGS': ['/nologo'], 'CCPCHFLAGS': ['${(PCH and "/Yu%s \\"/Fp%s\\""%(PCHSTOP or "",File(PCH))) or ""}'], 'CCPDBFLAGS': ['${(PDB and "/Z7") or ""}'], 'CFILESUFFIX': '.c', 'CFLAGS': [], 'CONFIGUREDIR': '#/.sconf_temp', 'CONFIGURELOG': '#/config.log', 'CPPDEFPREFIX': '/D', 'CPPDEFSUFFIX': '', 'CPPSUFFIXES': [ '.c', '.C', '.cxx', '.cpp', '.c++', '.cc', '.h', '.H', '.hxx', '.hpp', '.hh', '.F', '.fpp', '.FPP', '.m', '.mm', '.S', '.spp', '.SPP', '.sx'], 'CXX': '$CC', 'CXXCOM': '${TEMPFILE("$CXX $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $CXXFLAGS $CCFLAGS $_CCCOMCOM","$CXXCOMSTR")}', 'CXXFILESUFFIX': '.cc', 'CXXFLAGS': ['$(', '/TP', '$)'], 'DSUFFIXES': ['.d'], 'Dir': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'Dirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'ENV': { 'PATH': 'C:\\WINDOWS\\System32', 'PATHEXT': '.COM;.EXE;.BAT;.CMD', 'SystemRoot': 'C:\\WINDOWS'}, 'ESCAPE': <function escape at 0x700000&gt;, 'File': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'HOST_ARCH': '', 'HOST_OS': 'win32', 'IDLSUFFIXES': ['.idl', '.IDL'], 'INCPREFIX': '/I', 'INCSUFFIX': '', 'INSTALL': <function copyFunc at 0x700000&gt;, 'INSTALLVERSIONEDLIB': <function copyFuncVersionedLib at 0x700000&gt;, 'LIBPREFIX': '', 'LIBPREFIXES': ['$LIBPREFIX'], 'LIBSUFFIX': '.lib', 'LIBSUFFIXES': ['$LIBSUFFIX'], 'MAXLINELENGTH': 2048, 'MSVC_SETUP_RUN': True, 'OBJPREFIX': '', 'OBJSUFFIX': '.obj', 'PCHCOM': '$CXX /Fo${TARGETS[1]} $CXXFLAGS $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS /c $SOURCES /Yc$PCHSTOP /Fp${TARGETS[0]} $CCPDBFLAGS $PCHPDBFLAGS', 'PCHPDBFLAGS': ['${(PDB and "/Yd") or ""}'], 'PLATFORM': 'win32', 'PROGPREFIX': '', 'PROGSUFFIX': '.exe', 'PSPAWN': <function piped_spawn at 0x700000&gt;, 'RC': 'rc', 'RCCOM': <SCons.Action.FunctionAction object at 0x700000&gt;, 'RCFLAGS': [], 'RCSUFFIXES': ['.rc', '.rc2'], 'RDirs': <SCons.Defaults.Variable_Method_Caller object at 0x700000&gt;, 'SCANNERS': [<SCons.Scanner.Base object at 0x700000&gt;], 'SHCC': '$CC', 'SHCCCOM': <SCons.Action.FunctionAction object at 0x700000&gt;, 'SHCCFLAGS': ['$CCFLAGS'], 'SHCFLAGS': ['$CFLAGS'], 'SHCXX': '$CXX', 'SHCXXCOM': '${TEMPFILE("$SHCXX $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $SHCXXFLAGS $SHCCFLAGS $_CCCOMCOM","$SHCXXCOMSTR")}', 'SHCXXFLAGS': ['$CXXFLAGS'], 'SHELL': None, 'SHLIBPREFIX': '', 'SHLIBSUFFIX': '.dll', 'SHOBJPREFIX': '$OBJPREFIX', 'SHOBJSUFFIX': '$OBJSUFFIX', 'SPAWN': <function spawn at 0x700000&gt;, 'STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME': 1, 'TARGET_ARCH': None, 'TARGET_OS': None, 'TEMPFILE': <class 'SCons.Platform.TempFileMunge'>, 'TEMPFILEPREFIX': '@', 'TOOLS': ['msvc', 'install', 'install'], '_CCCOMCOM': '$CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS $CCPCHFLAGS $CCPDBFLAGS', '_CPPDEFFLAGS': '${_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__)}', '_MSVC_OUTPUT_FLAG': <function msvc_output_flag at 0x700000&gt;, '__DSHLIBVERSIONFLAGS': '${__libversionflags(__env__,"DSHLIBVERSION","_DSHLIBVERSIONFLAGS")}', '__LDMODULEVERSIONFLAGS': '${__libversionflags(__env__,"LDMODULEVERSION","_LDMODULEVERSIONFLAGS")}', '__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.