diff --git a/.travis.yml b/.travis.yml
index f76e6822f..738368ffc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,12 +5,13 @@ install:
 - export BOOST_DIR=$HOME/boost_1_63_0
 - export SLIC3R_STATIC=1
 - export CXX=g++-4.9
-- export CC=g++-4.9
+- export CC=gcc-4.9
 - source $HOME/perl5/perlbrew/etc/bashrc
 script:
 - bash package/linux/travis-setup.sh
 - perlbrew switch slic3r-perl
-- perl ./Build.PL
+- cmake -DBOOST_ROOT=$BOOST_DIR src/
+- make
 after_success:
 - eval $(perl -Mlocal::lib=$TRAVIS_BUILD_DIR/local-lib)
 - LD_LIBRARY_PATH=$WXDIR/lib package/linux/make_archive.sh linux-x64
@@ -22,6 +23,7 @@ branches:
   only:
   - master
   - xsgui
+  - cppgui
 cache:
   apt: true
   directories:
@@ -36,6 +38,10 @@ addons:
     - libgtk2.0-0 
     - libgtk2.0-dev
     - freeglut3
+    - cmake
+    - wx3.0-headers
+    - libwxgtk3.0-dev
+    - wx-common
   ssh_known_hosts: dl.slic3r.org
 notifications:
   irc:
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fb34b5ae8..bd8f28ffb 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8)
+cmake_minimum_required (VERSION 3.9)
 project (slic3r)
 
 # only on newer GCCs: -ftemplate-backtrace-limit=0
@@ -17,14 +17,17 @@ IF(CMAKE_HOST_APPLE)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++ -DBOOST_THREAD_DONT_USE_CHRONO -DBOOST_NO_CXX11_RVALUE_REFERENCES -DBOOST_THREAD_USES_MOVE")
     set(CMAKE_EXE_LINKER_FLAGS "-framework IOKit -framework CoreFoundation -lc++")
 ELSE(CMAKE_HOST_APPLE)
-    set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
+#    set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++ -L.")
 ENDIF(CMAKE_HOST_APPLE)
-set(Boost_USE_STATIC_LIBS ON)
-set(Boost_USE_STATIC_RUNTIME ON)
-set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
+
+set(Boost_USE_STATIC_LIBS OFF)
+set(Boost_USE_STATIC_RUNTIME OFF)
+find_package(Threads REQUIRED)
+
 find_package(Boost COMPONENTS system thread filesystem)
 
 set(LIBDIR ${CMAKE_CURRENT_SOURCE_DIR}/../xs/src/)
+set(GUI_LIBDIR ${CMAKE_CURRENT_SOURCE_DIR}/GUI/)
 
 include_directories(${LIBDIR})
 include_directories(${LIBDIR}/libslic3r)
@@ -53,6 +56,7 @@ add_library(libslic3r STATIC
     ${LIBDIR}/libslic3r/Fill/FillHoneycomb.cpp
     ${LIBDIR}/libslic3r/Fill/FillPlanePath.cpp
     ${LIBDIR}/libslic3r/Fill/FillRectilinear.cpp
+    ${LIBDIR}/libslic3r/Fill/FillGyroid.cpp
     ${LIBDIR}/libslic3r/Flow.cpp
     ${LIBDIR}/libslic3r/GCode.cpp
     ${LIBDIR}/libslic3r/GCode/CoolingBuffer.cpp
@@ -122,29 +126,29 @@ add_library(poly2tri STATIC
 )
 
 add_executable(slic3r slic3r.cpp)
-set_target_properties(slic3r PROPERTIES LINK_SEARCH_START_STATIC 1)
-set_target_properties(slic3r PROPERTIES LINK_SEARCH_END_STATIC 1)
+#set_target_properties(slic3r PROPERTIES LINK_SEARCH_START_STATIC 1)
+#set_target_properties(slic3r PROPERTIES LINK_SEARCH_END_STATIC 1)
 
-add_executable(extrude-tin utils/extrude-tin.cpp)
-set_target_properties(extrude-tin PROPERTIES LINK_SEARCH_START_STATIC 1)
-set_target_properties(extrude-tin PROPERTIES LINK_SEARCH_END_STATIC 1)
+#add_executable(extrude-tin utils/extrude-tin.cpp)
+#set_target_properties(extrude-tin PROPERTIES LINK_SEARCH_START_STATIC 1)
+#set_target_properties(extrude-tin PROPERTIES LINK_SEARCH_END_STATIC 1)
 
-set(wxWidgets_USE_STATIC)
-SET(wxWidgets_USE_LIBS)
+set(Boost_USE_STATIC_LIBS OFF)
+set(Boost_USE_STATIC_RUNTIME OFF)
 
-set(Boost_USE_STATIC_LIBS ON)
-set(Boost_USE_STATIC_RUNTIME ON)
-set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
 find_library(bsystem_l boost_system)
-add_library(bsystem STATIC IMPORTED)
+add_library(bsystem SHARED IMPORTED)
 set_target_properties(bsystem PROPERTIES IMPORTED_LOCATION ${bsystem_l})
 find_library(bthread_l boost_thread)
-add_library(bthread STATIC IMPORTED)
+add_library(bthread SHARED IMPORTED)
 set_target_properties(bthread PROPERTIES IMPORTED_LOCATION ${bthread_l})
 include_directories(${Boost_INCLUDE_DIRS})
 
-#find_package(wxWidgets)
-#disable wx for the time being - we're not building any of the gui yet
+set(wxWidgets_USE_STATIC OFF)
+set(wxWidgets_USE_UNICODE ON)
+
+find_package(wxWidgets COMPONENTS base aui core)
+
 IF(CMAKE_HOST_UNIX)
     #set(Boost_LIBRARIES bsystem bthread bfilesystem)
 ENDIF(CMAKE_HOST_UNIX)
@@ -154,9 +158,16 @@ target_link_libraries (slic3r libslic3r admesh BSpline clipper expat polypartiti
 IF(wxWidgets_FOUND)
     MESSAGE("wx found!")
     INCLUDE("${wxWidgets_USE_FILE}")
-    add_library(slic3r_gui STATIC ${LIBDIR}/slic3r/GUI/3DScene.cpp ${LIBDIR}/slic3r/GUI/GUI.cpp)
+    include_directories(${GUI_LIBDIR})
+    include_directories(${wxWidgets_INCLUDE})
+
+    add_library(slic3r_gui STATIC 
+    ${GUI_LIBDIR}/MainFrame.cpp
+    ${GUI_LIBDIR}/GUI.cpp
+    ${GUI_LIBDIR}/misc_ui.cpp
+    )
     #only build GUI lib if building with wx
-    target_link_libraries (slic3r slic3r-gui ${wxWidgets_LIBRARIES})
+    target_link_libraries (slic3r slic3r_gui ${wxWidgets_LIBRARIES})
 ELSE(wxWidgets_FOUND)
     # For convenience. When we cannot continue, inform the user
     MESSAGE("wx not found!")
@@ -169,8 +180,8 @@ IF (WIN32)
         ${LIBDIR}/boost/nowide/iostream.cpp
     )
 
-    target_link_libraries(slic3r boost-nowide)
-    target_link_libraries(extrude-tin boost-nowide)
+    target_link_libraries(slic3r STATIC boost-nowide)
+#    target_link_libraries(extrude-tin boost-nowide)
 ENDIF(WIN32)
 
-target_link_libraries (extrude-tin libslic3r admesh BSpline clipper expat polypartition poly2tri ${Boost_LIBRARIES})
+#target_link_libraries (extrude-tin libslic3r admesh BSpline clipper expat polypartition poly2tri ${Boost_LIBRARIES})
diff --git a/src/GUI/Controller.hpp b/src/GUI/Controller.hpp
new file mode 100644
index 000000000..ef3650886
--- /dev/null
+++ b/src/GUI/Controller.hpp
@@ -0,0 +1,15 @@
+#ifndef CONTROLLER_UI_HPP
+#define CONTROLLER_UI_HPP
+
+namespace Slic3r { namespace GUI {
+
+class Controller : public wxPanel { 
+public:
+    Controller(wxWindow* parent, const wxString& title) : 
+        wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, title)
+    { }
+};
+
+}} // Namespace Slic3r::GUI
+
+#endif // CONTROLLER_UI_HPP
diff --git a/src/GUI/GUI.cpp b/src/GUI/GUI.cpp
new file mode 100644
index 000000000..b2a1e280b
--- /dev/null
+++ b/src/GUI/GUI.cpp
@@ -0,0 +1,26 @@
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+
+#include "MainFrame.hpp"
+#include "GUI.hpp"
+
+namespace Slic3r { namespace GUI {
+
+enum
+{
+    ID_Hello = 1
+};
+bool App::OnInit()
+{
+    MainFrame *frame = new MainFrame( "Slic3r", wxDefaultPosition, wxDefaultSize, this->gui_config);
+  
+    frame->Show( true );
+
+    this->SetAppName("Slic3r");
+
+    return true;
+}
+
+}} // namespace Slic3r::GUI
diff --git a/src/GUI/GUI.hpp b/src/GUI/GUI.hpp
new file mode 100644
index 000000000..82d6de746
--- /dev/null
+++ b/src/GUI/GUI.hpp
@@ -0,0 +1,33 @@
+#ifndef GUI_HPP
+#define GUI_HPP
+#include "MainFrame.hpp"
+#include "Notifier.hpp"
+#include <string>
+#include  <vector>
+
+namespace Slic3r { namespace GUI {
+
+// Friendly indices for the preset lists.
+enum class PresetID {
+    PRINT = 0,
+    FILAMENT = 1,
+    PRINTER = 2
+};
+using preset_list = std::vector<std::string>;
+
+class App: public wxApp
+{
+public:
+    virtual bool OnInit();
+    App(std::shared_ptr<Settings> config) : wxApp(), gui_config(config) {}
+
+    void check_version(bool manual) { /* stub */}
+
+private:
+    std::shared_ptr<Settings> gui_config; // GUI-specific configuration options
+    Notifier* notifier;
+    std::vector<preset_list> presets { preset_list(), preset_list(), preset_list() };
+};
+
+}} // namespace Slic3r::GUI
+#endif // GUI_HPP
diff --git a/src/GUI/MainFrame.cpp b/src/GUI/MainFrame.cpp
new file mode 100644
index 000000000..f006423b1
--- /dev/null
+++ b/src/GUI/MainFrame.cpp
@@ -0,0 +1,171 @@
+#include "MainFrame.hpp"
+#include "misc_ui.hpp"
+#include <wx/accel.h>
+#include <wx/utils.h> 
+
+namespace Slic3r { namespace GUI {
+
+wxBEGIN_EVENT_TABLE(MainFrame, wxFrame)
+wxEND_EVENT_TABLE()
+
+MainFrame::MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
+        : MainFrame(title, pos, size, nullptr) {}
+MainFrame::MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size, std::shared_ptr<Settings> config)
+        : wxFrame(NULL, wxID_ANY, title, pos, size), loaded(false),
+        tabpanel(nullptr), controller(nullptr), plater(nullptr), gui_config(config), preset_editor_tabs(std::map<wxWindowID, PresetEditor*>())
+{
+    // Set icon to either the .ico if windows or png for everything else.
+    if (the_os == OS::Windows) 
+        this->SetIcon(wxIcon(var("Slic3r.ico"), wxBITMAP_TYPE_ICO));
+    else
+        this->SetIcon(wxIcon(var("Slic3r_128px.png"), wxBITMAP_TYPE_PNG));        
+    
+
+    this->init_tabpanel();
+    this->init_menubar();
+
+    wxToolTip::SetAutoPop(TOOLTIP_TIMER);
+
+    // STUB: Initialize status bar with text.
+    /*    # initialize status bar
+    $self->{statusbar} = Slic3r::GUI::ProgressStatusBar->new($self, -1);
+    $self->{statusbar}->SetStatusText("Version $Slic3r::VERSION - Remember to check for updates at http://slic3r.org/");
+    $self->SetStatusBar($self->{statusbar}); */
+
+    this->loaded = 1;
+
+    // Initialize layout
+    {
+        wxSizer* sizer = new wxBoxSizer(wxVERTICAL);
+        sizer->Add(this->tabpanel, 1, wxEXPAND);
+        sizer->SetSizeHints(this);
+        this->Fit();
+        this->SetMinSize(wxSize(760, 490));
+        this->SetSize(this->GetMinSize());
+        wxTheApp->SetTopWindow(this);
+        this->Show();
+        this->Layout();
+    }
+/*
+    # declare events
+    EVT_CLOSE($self, sub {
+        my (undef, $event) = @_;
+        
+        if ($event->CanVeto) {
+            if (!$self->{plater}->prompt_unsaved_changes) {
+                $event->Veto;
+                return;
+            }
+            
+            if ($self->{controller} && $self->{controller}->printing) {
+                my $confirm = Wx::MessageDialog->new($self, "You are currently printing. Do you want to stop printing and continue anyway?",
+                    'Unfinished Print', wxICON_QUESTION | wxYES_NO | wxNO_DEFAULT);
+                if ($confirm->ShowModal == wxID_NO) {
+                    $event->Veto;
+                    return;
+                }
+            }
+        }
+        
+        # save window size
+        wxTheApp->save_window_pos($self, "main_frame");
+        
+        # propagate event
+        $event->Skip;
+    });
+*/
+}
+
+/// Private initialization function for the main frame tab panel.
+void MainFrame::init_tabpanel()
+{
+    this->tabpanel = new wxAuiNotebook(this, -1, wxDefaultPosition, wxDefaultSize, wxAUI_NB_TOP);
+    auto panel = this->tabpanel; 
+
+    panel->Bind(wxEVT_AUINOTEBOOK_PAGE_CHANGED, ([=](wxAuiNotebookEvent& e) 
+    { 
+        auto tabpanel = this->tabpanel;
+        // TODO: trigger processing for activation event
+        if (tabpanel->GetSelection() > 1) {
+            tabpanel->SetWindowStyle(tabpanel->GetWindowStyleFlag() | wxAUI_NB_CLOSE_ON_ACTIVE_TAB);
+        } else if (this->gui_config->show_host == false && tabpanel->GetSelection() == 1) {
+            tabpanel->SetWindowStyle(tabpanel->GetWindowStyleFlag() | wxAUI_NB_CLOSE_ON_ACTIVE_TAB);
+        } else {
+            tabpanel->SetWindowStyle(tabpanel->GetWindowStyleFlag() | ~wxAUI_NB_CLOSE_ON_ACTIVE_TAB);
+        }
+    }), panel->GetId());
+
+    panel->Bind(wxEVT_AUINOTEBOOK_PAGE_CLOSE, ([=](wxAuiNotebookEvent& e) 
+    {
+        if (typeid(panel) == typeid(Slic3r::GUI::PresetEditor)) {
+            wxDELETE(this->preset_editor_tabs[panel->GetId()]);
+        }
+        wxTheApp->CallAfter([=] { this->tabpanel->SetSelection(0); });
+    }), panel->GetId());
+
+    this->plater = new Slic3r::GUI::Plater(panel, _("Plater"));
+    this->controller = new Slic3r::GUI::Controller(panel, _("Controller"));
+
+    panel->AddPage(this->plater, this->plater->GetName());
+    if (this->gui_config->show_host) panel->AddPage(this->controller, this->controller->GetName());
+    
+}
+
+void MainFrame::init_menubar()
+{
+
+    wxMenu* menuFile = new wxMenu();
+    {
+    }
+    
+    wxMenu* menuPlater = new wxMenu();
+    {
+    }
+    wxMenu* menuObject = new wxMenu();
+    {
+    }
+    wxMenu* menuSettings = new wxMenu();
+    {
+    }
+    wxMenu* menuView = new wxMenu();
+    {
+    }
+    wxMenu* menuWindow = new wxMenu();
+    {
+    }
+    wxMenu* menuHelp = new wxMenu();
+    {
+        // TODO: Reimplement config wizard
+        //menuHelp->AppendSeparator();
+        append_menu_item(menuHelp, _("Slic3r &Website"), _("Open the Slic3r website in your browser"), [=](wxCommandEvent& e) 
+        {
+            wxLaunchDefaultBrowser("http://www.slic3r.org");
+        });
+        append_menu_item(menuHelp, _("Check for &Updates..."), _("Check for new Slic3r versions"), [=](wxCommandEvent& e)
+        {
+            check_version(true);
+        });
+        append_menu_item(menuHelp, _("Slic3r &Manual"), _("Open the Slic3r manual in your browser"), [=](wxCommandEvent& e) 
+        {
+            wxLaunchDefaultBrowser("http://manual.slic3r.org/");
+        });
+        append_menu_item(menuHelp, _("&About Slic3r"), _("Show about dialog"), [=](wxCommandEvent& e) 
+        {
+        }, wxID_ABOUT);
+        
+    }
+
+    wxMenuBar* menubar = new wxMenuBar();
+    menubar->Append(menuFile, _("&File"));
+    menubar->Append(menuPlater, _("&Plater"));
+    menubar->Append(menuObject, _("&Object"));
+    menubar->Append(menuSettings, _("&Settings"));
+    menubar->Append(menuView, _("&View"));
+    menubar->Append(menuWindow, _("&Window"));
+    menubar->Append(menuHelp, _("&Help"));
+
+    this->SetMenuBar(menubar);
+
+}
+
+}} // Namespace Slic3r::GUI
diff --git a/src/GUI/MainFrame.hpp b/src/GUI/MainFrame.hpp
new file mode 100644
index 000000000..e4014a27c
--- /dev/null
+++ b/src/GUI/MainFrame.hpp
@@ -0,0 +1,62 @@
+
+#ifndef MAINFRAME_HPP
+#define MAINFRAME_HPP
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+#include <wx/aui/auibook.h>
+#include <wx/tooltip.h>
+
+#include <memory>
+#include <map>
+
+
+#include "Controller.hpp"
+#include "Plater.hpp"
+#include "PresetEditor.hpp"
+#include "Settings.hpp"
+#include "GUI.hpp"
+
+namespace Slic3r { namespace GUI {
+
+template <typename T>
+void append_menu_item(wxMenu* menu, const wxString& name,const wxString& help, T lambda, int id = wxID_ANY, const wxBitmap& icon = wxBitmap(), const wxString& accel = "") {
+    wxMenuItem* tmp = menu->Append(wxID_ANY, name, help);
+    wxAcceleratorEntry* a = new wxAcceleratorEntry();
+    if (a->FromString(accel))
+        tmp->SetAccel(a); // set the accelerator if and only if the accelerator is fine
+    tmp->SetHelp(help);
+
+    menu->Bind(wxEVT_MENU, lambda, tmp->GetId(), tmp->GetId());
+}
+
+constexpr unsigned int TOOLTIP_TIMER = 32767;
+
+class MainFrame: public wxFrame
+{
+public:
+    MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+    MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size, std::shared_ptr<Settings> gui_config);
+private:
+    wxDECLARE_EVENT_TABLE();
+
+    void init_menubar(); //< Routine to intialize all top-level menu items.
+    void init_tabpanel(); //< Routine to initialize all of the tabs.
+
+    bool loaded; //< Main frame itself has finished loading.
+    // STUB: preset editor tabs storage
+    // STUB: Statusbar reference
+
+    wxAuiNotebook* tabpanel;
+    Controller* controller;
+    Plater* plater;
+
+
+    std::shared_ptr<Settings> gui_config;
+    std::map<wxWindowID, PresetEditor*> preset_editor_tabs;
+
+};
+
+}} // Namespace Slic3r::GUI
+#endif // MAINFRAME_HPP
diff --git a/src/GUI/Notifier.hpp b/src/GUI/Notifier.hpp
new file mode 100644
index 000000000..f7a9c0d92
--- /dev/null
+++ b/src/GUI/Notifier.hpp
@@ -0,0 +1,15 @@
+#ifndef NOTIFIER_HPP
+#define NOTIFIER_HPP
+
+namespace Slic3r { namespace GUI {
+
+/// Class to perform window manager notifications using Growl and/or DBus XWindow
+
+class Notifier { 
+public:
+    Notifier() { }
+};
+
+}} // Namespace Slic3r::GUI
+
+#endif // NOTIFIER_HPP
diff --git a/src/GUI/Plater.hpp b/src/GUI/Plater.hpp
new file mode 100644
index 000000000..bf7aa917a
--- /dev/null
+++ b/src/GUI/Plater.hpp
@@ -0,0 +1,17 @@
+#ifndef PLATER_HPP
+#define PLATER_HPP
+
+namespace Slic3r { namespace GUI {
+
+class Plater : public wxPanel 
+{
+public:
+    Plater(wxWindow* parent, const wxString& title) : 
+        wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, title)
+    { }
+
+};
+
+} } // Namespace Slic3r::GUI
+
+#endif  // PLATER_HPP
diff --git a/src/GUI/PresetEditor.hpp b/src/GUI/PresetEditor.hpp
new file mode 100644
index 000000000..8d6359eab
--- /dev/null
+++ b/src/GUI/PresetEditor.hpp
@@ -0,0 +1,11 @@
+#ifndef PRESETEDITOR_HPP
+#define PRESETEDITOR_HPP
+
+namespace Slic3r { namespace GUI {
+
+class PresetEditor : public wxPanel {
+
+};
+
+}} // namespace Slic3r::GUI
+#endif // PRESETEDITOR_HPP
diff --git a/src/GUI/Settings.hpp b/src/GUI/Settings.hpp
new file mode 100644
index 000000000..07e219406
--- /dev/null
+++ b/src/GUI/Settings.hpp
@@ -0,0 +1,15 @@
+#ifndef SETTINGS_HPP
+#define SETTINGS_HPP
+namespace Slic3r { namespace GUI {
+
+/// Stub class to hold onto GUI-specific settings options. 
+/// TODO: Incorporate a copy of Slic3r::Config 
+class Settings { 
+    public:
+        bool show_host;
+        Settings(): show_host(false) {} //< Show host/controller tab
+};
+
+}} //namespace Slic3r::GUI
+
+#endif // SETTINGS_HPP
diff --git a/src/GUI/misc_ui.cpp b/src/GUI/misc_ui.cpp
new file mode 100644
index 000000000..278f6e4d7
--- /dev/null
+++ b/src/GUI/misc_ui.cpp
@@ -0,0 +1,30 @@
+#include "misc_ui.hpp"
+namespace Slic3r { namespace GUI {
+
+
+#ifdef SLIC3R_DEV
+void check_version(bool manual)  {
+}
+#else
+void check_version(bool manual)  {
+}
+
+#endif
+
+const wxString var(const wxString& in) {
+    wxFileName f(wxStandardPaths::Get().GetExecutablePath());
+    wxString appPath(f.GetPath());
+
+    // replace center string with path to VAR in actual distribution later
+    return appPath + "/../var/" + in;
+}
+
+/// Returns the path to Slic3r's default user data directory.
+const wxString home(const wxString& in) { 
+    if (the_os == OS::Windows) 
+        return wxGetHomeDir() + "/" + in + "/";
+    return wxGetHomeDir() + "/." + in + "/";
+}
+
+}} // namespace Slic3r::GUI
+
diff --git a/src/GUI/misc_ui.hpp b/src/GUI/misc_ui.hpp
new file mode 100644
index 000000000..cc92e5a03
--- /dev/null
+++ b/src/GUI/misc_ui.hpp
@@ -0,0 +1,44 @@
+#ifndef MISC_UI_HPP
+#define MISC_UI_HPP
+
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+
+#include <wx/filename.h>
+#include <wx/stdpaths.h>
+
+/// Common static (that is, free-standing) functions, not part of an object hierarchy.
+
+namespace Slic3r { namespace GUI {
+
+enum class OS { Linux, Mac, Windows } ;
+// constants to reduce the proliferation of macros in the rest of the code
+#ifdef __WIN32
+constexpr OS the_os = OS::Windows;
+#elif __APPLE__
+constexpr OS the_os = OS::Mac;
+#elif __linux__
+constexpr OS the_os = OS::Linux;
+#endif
+
+#ifdef SLIC3R_DEV
+constexpr bool isDev = true;
+#else
+constexpr bool isDev = false;
+#endif
+
+/// Performs a check via the Internet for a new version of Slic3r.
+/// If this version of Slic3r was compiled with -DSLIC3R_DEV, check the development 
+/// space instead of release.
+void check_version(bool manual = false);
+
+const wxString var(const wxString& in);
+
+/// Always returns path to home directory.
+const wxString home(const wxString& in = "Slic3r");
+
+}} // namespace Slic3r::GUI
+
+#endif // MISC_UI_HPP
diff --git a/src/slic3r.cpp b/src/slic3r.cpp
index bf2fb2be7..82a04a1f1 100644
--- a/src/slic3r.cpp
+++ b/src/slic3r.cpp
@@ -13,6 +13,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/nowide/args.hpp>
 #include <boost/nowide/iostream.hpp>
+#include "GUI/GUI.hpp"
 
 
 using namespace Slic3r;
@@ -39,6 +40,15 @@ main(int argc, char **argv)
     cli_config.apply(config, true);
     
     DynamicPrintConfig print_config;
+
+    std::shared_ptr<GUI::Settings> gui_config = std::make_shared<GUI::Settings>();
+
+    GUI::App *gui = new GUI::App(gui_config);
+    
+    gui_config->show_host = true;
+
+    GUI::App::SetInstance(gui);
+    wxEntry(argc, argv);
     
     // load config files supplied via --load
     for (const std::string &file : cli_config.load.values) {