Setup the submodules automaticilly

Use system libraries on linux rather than included

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "3rdparty"]
 	path = 3rdparty
-	url = git@github.com:wxLauncher/wxlauncher-3rdparty.git
+	url = https://github.com/wxLauncher/wxlauncher-3rdparty.git
 [submodule "cmake/modules/sdl2-cmake-scripts"]
 	path = cmake/modules/sdl2-cmake-scripts
-	url = ssh://git@github.com/IssMneur/sdl2-cmake-scripts
+	url = https://github.com/IssMneur/sdl2-cmake-scripts.git

CMakeLists.txt

@@ -20,28 +20,32 @@ if(NOT GIT_EXECUTABLE)
 		" - Call cmake with -DGIT_EXECUTABLE=<full path to git>")
 endif()
 
-# Special source directorys
+if(NOT(DEFINED IS_WIN32 OR DEFINED IS_LINUX OR DEFINED IS_APPLE))
+	if(WIN32)
+		set(IS_WIN32 TRUE)
+		set(USE_3RDPARTY_DEFAULT ON)
+	elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+		set(IS_APPLE TRUE)
+		set(USE_3RDPARTY_DEFAULT ON)
+	else()
+		set(IS_LINUX TRUE)
+		set(USE_3RDPARTY_DEFAULT OFF)
+	endif()
+endif()
+
+# Special source directories
 set(LAUNCHER_CMAKE_SOURCE_DIR ${CMAKE_SOURCE_DIR}/cmake)
+include(${LAUNCHER_CMAKE_SOURCE_DIR}/setup_submodules.cmake)
 include(${LAUNCHER_CMAKE_SOURCE_DIR}/modules/modules.cmake)
 list(INSERT CMAKE_MODULE_PATH 0 "${LAUNCHER_CMAKE_SOURCE_DIR}/include")
 set(3RD_PARTY_SOURCE_DIR ${CMAKE_SOURCE_DIR}/3rdparty)
 
-
 include(${LAUNCHER_CMAKE_SOURCE_DIR}/GetVersionFromGitTag.cmake)
 
 message("--- Configuring wxLauncher ${wxlauncher_VERSION_STRING_FULL}")
 
-if(NOT(DEFINED IS_WIN32 OR DEFINED IS_LINUX OR DEFINED IS_APPLE))
-  if(WIN32)
-    set(IS_WIN32 TRUE)
-  elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-    set(IS_APPLE TRUE)
-  else()
-    set(IS_LINUX TRUE)
-  endif()
-endif()
-
-option(USE_3RDPARTY "Use the libraries in the 3rd party directory" ON)
+option(USE_3RDPARTY "Use the libraries in the 3rd party directory"
+	${USE_3RDPARTY_DEFAULT})
 if(USE_3RDPARTY)
 	message("--- Using 3rd party source directory")
 	execute_process(COMMAND ${CMAKE_COMMAND}
@@ -363,8 +367,14 @@ add_executable(wxlauncher WIN32 MACOSX_BUNDLE
   ${RESOURCE_FILES}
   ${CODE_FILES}
   )
+# C++11 is required for wxWidgets 3.0 and wxLauncher's new code
+# (the auto_type specifically)
 if (COMMAND target_compile_features)
-  target_compile_features(wxlauncher PRIVATE cxx_auto_type) # Enable C++11 because it is required for wxWidgets 3.0
+	# target_compile_features added in CMake 3.1
+	target_compile_features(wxlauncher PRIVATE cxx_auto_type)
+else()
+	set_property(TARGET wxlauncher APPEND_STRING
+		PROPERTY COMPILE_FLAGS "-std=c++11")
 endif()
 
 set_target_properties(wxlauncher
@@ -388,7 +398,7 @@ foreach(temp_file ${helpmaker_temp_files})
   set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES ${temp_file})
 endforeach(temp_file)
 
-target_link_libraries(wxlauncher ${wxWidgets_LIBRARIES} ${SDL2_LIBRARIES})
+target_link_libraries(wxlauncher ${wxWidgets_LIBRARIES} ${SDL2_LIBRARY})
 
 # adapted from http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_apply_resources_on_Mac_OS_X_automatically.3F
 # copies necessary resources (and frameworks, if needed) to .app bundle

cmake/setup_submodules.cmake

@@ -0,0 +1,14 @@
+set(STATUS)
+execute_process(COMMAND ${GIT_EXECUTABLE} submodule init
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+	RESULT_VARIABLE STATUS)
+if(STATUS)
+	message(FATAL_ERROR "Failed to init submodules: ${STATUS}")
+endif()
+set(STATUS)
+execute_process(COMMAND ${GIT_EXECUTABLE} submodule update
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+	RESULT_VARIABLE STATUS)
+if(STATUS)
+	message(FATAL_ERROR "Failed to update submodules: ${STATUS}")
+endif()

code/apis/resolution_manager.cpp

@@ -254,10 +254,6 @@ void EnumerateGraphicsModes_sdl(
 #endif
 }
 
-#if !HAS_SDL && !defined(WIN32)
-#error No implementation of EnumerateGraphicsModes available
-#endif
-
 /** Get available graphics modes for API and return them sorted */
 void ResolutionMan::EnumerateGraphicsModes(
 	ApiType type, ResolutionArray& out_modes,