need to update sdl

external/SDL/.github/cmake/CMakeLists.txt

@@ -1,16 +0,0 @@
-cmake_minimum_required(VERSION 3.0...3.5)
-project(ci_utils C CXX)
-
-set(txt "CC=${CMAKE_C_COMPILER}
-CXX=${CMAKE_CXX_COMPILER}
-CFLAGS=${CMAKE_C_FLAGS}
-CXXFLAGS=${CMAKE_CXX_FLAGS}
-LDFLAGS=${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_C_STANDARD_LIBRARIES}
-")
-
-message("${txt}")
-
-set(VAR_PATH "/tmp/env.txt" CACHE PATH "Where to write environment file")
-message(STATUS "Writing CC/CXX/CFLAGS/CXXFLAGS/LDFLAGS environment to ${VAR_PATH}")
-
-file(WRITE "${VAR_PATH}" "${txt}")