initial commit

cmake/libraries/sdl.cmake

@@ -0,0 +1,33 @@
+if(PROJECT_ENABLE_SDL)
+  if(PROJECT_BUILD)
+    add_definitions(-DPROJECT_ENABLE_SDL)
+
+    set(SDL2_NO_MWINDOWS ON)
+    find_package(SDL2 ${SDL_VERSION} REQUIRED)
+
+    include_directories(SYSTEM ${SDL2_INCLUDE_DIRS})
+
+    link_libraries(SDL2::SDL2)
+  elseif(NOT PROJECT_IS_MINGW)
+    if(PROJECT_BUILD_SHARED_LIBS)
+      set(SDL_CONFIGURE_OPTS --enable-shared=yes --enable-static=yes)
+    else()
+      set(SDL_CONFIGURE_OPTS --enable-shared=no --enable-static=yes)
+    endif()
+
+    ExternalProject_Add(sdl_project
+      PREFIX external
+      URL ${PROJECT_3RD_PARTY_DIR}/sdl-${SDL_VERSION}.tar.gz
+      URL_HASH SHA256=${SDL_HASH}
+      BUILD_IN_SOURCE 1
+      LIST_SEPARATOR |
+      CONFIGURE_COMMAND ./configure 
+        --prefix=${PROJECT_EXTERNAL_BUILD_ROOT}
+        ${SDL_CONFIGURE_OPTS}
+      BUILD_COMMAND make -j1
+      INSTALL_COMMAND make install
+    )
+
+    list(APPEND PROJECT_DEPENDENCIES sdl_project)
+  endif()
+endif()