Merge branch 'master' of https://github.com/prusa3d/Slic3r into et_canvas_gui_refactoring

CMakeLists.txt

@@ -34,6 +34,8 @@ option(SLIC3R_PERL_XS           "Compile XS Perl module and enable Perl unit and
 option(SLIC3R_ASAN              "Enable ASan on Clang and GCC" 0)
 option(SLIC3R_SYNTAXONLY        "Only perform source code correctness checking, no binary output (UNIX only)" 0)
 
+set(SLIC3R_GTK "2" CACHE STRING "GTK version to use with wxWidgets on Linux")
+
 # Proposal for C++ unit tests and sandboxes
 option(SLIC3R_BUILD_SANDBOXES   "Build development sandboxes" OFF)
 option(SLIC3R_BUILD_TESTS       "Build unit tests" OFF)

doc/How to build - Windows.md

@@ -91,6 +91,10 @@ You can also use the Visual Studio GUI or other generators as mentioned above.
 The `DESTDIR` option is the location where the bundle will be installed.
 This may be customized. If you leave it empty, the `DESTDIR` will be places inside the same `build` directory.
 
+Warning: If the `build` directory is nested too deep inside other folders, various file paths during the build
+become too long and the build might fail due to file writing errors. For this reason, it is recommended to
+place the `build` directory relatively close to the drive root.
+
 Note that the build variant that you may choose using Visual Studio (i.e. _Release_ or _Debug_ etc.) when building the dependency package is **not relevant**.
 The dependency build will by default build _both_ the _Release_ and _Debug_ variants regardless of what you choose in Visual Studio.
 You can disable building of the debug variant by passing the `-DDEP_DEBUG=OFF` option to CMake, this will only produce a _Release_ build.

src/CMakeLists.txt

@@ -60,6 +60,7 @@ if (SLIC3R_GUI)
     endif()
 
     if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+        set (wxWidgets_CONFIG_OPTIONS "--toolkit=gtk${SLIC3R_GTK}")
         if (SLIC3R_WX_STABLE)
             find_package(wxWidgets 3.0 REQUIRED COMPONENTS base core adv html gl)
         else ()