fix for c++20 on linux

CMakeLists.txt

@@ -18,6 +18,10 @@ find_program(SLANGC
     PATHS /opt/shader-slang-bin/bin
 )
 
+# stb_image
+add_library(stb_image STATIC libs/stb/stb_image.c)
+target_include_directories(stb_image INTERFACE libs/stb)
+
 function(add_shader name)
     set(INPUT_FILE  ${CMAKE_CURRENT_SOURCE_DIR}/assets/shader/${name}.slang)
     set(OUTPUT_FILE ${CMAKE_CURRENT_SOURCE_DIR}/assets/shader/${name}.h)
@@ -46,6 +50,7 @@ add_executable(mikemon
 target_link_libraries(mikemon
     PRIVATE
         SDL3::SDL3
+        stb_image
 )
 add_dependencies(mikemon 
     basic_vertex_shader