Merge branch 'cmake-gcc-static' of https://github.com/Deamhan/wxWidgets

Add support for using static CRT libraries with gcc to CMake build.

See https://github.com/wxWidgets/wxWidgets/pull/1398

build/cmake/options.cmake

@@ -26,8 +26,11 @@ mark_as_advanced(wxBUILD_CUSTOM_SETUP_HEADER_PATH)
 wx_option(wxBUILD_DEBUG_LEVEL "Debug Level" Default STRINGS Default 0 1 2)
 mark_as_advanced(wxBUILD_DEBUG_LEVEL)
 
-if(MSVC)
+if(NOT APPLE)
     wx_option(wxBUILD_USE_STATIC_RUNTIME "Link using the static runtime library" OFF)
+endif()
+
+if(MSVC)
     wx_option(wxBUILD_MSVC_MULTIPROC "Enable multi-processor compilation for MSVC")
 else()
     # Other compilers support setting the C++ standard, present it an option to the user
@@ -58,7 +61,9 @@ if(NOT WIN32)
 endif()
 
 wx_option(wxUSE_COMPILER_TLS "enable use of compiler TLS support")
-wx_option(wxUSE_VISIBILITY "use of ELF symbols visibility")
+if(NOT WIN32)
+    wx_option(wxUSE_VISIBILITY "use of ELF symbols visibility")
+endif()
 wx_option(wxUSE_UNSAFE_WXSTRING_CONV "provide unsafe implicit conversions in wxString to const char* or std::string")
 wx_option(wxUSE_REPRODUCIBLE_BUILD "enable reproducable build" OFF)