Build stb_image directly from the stb header (#805)

Author: aobolensk

3rdparty/stb_image_wrapper.cpp

@@ -1,8 +1,12 @@
 include_guard()
 
 function(ppc_link_stb exec_func_lib)
-  add_library(stb_image STATIC
-              ${CMAKE_SOURCE_DIR}/3rdparty/stb_image_wrapper.cpp)
-  target_include_directories(stb_image PUBLIC ${CMAKE_SOURCE_DIR}/3rdparty/stb)
+  set(stb_image_header ${CMAKE_SOURCE_DIR}/3rdparty/stb/stb_image.h)
+
+  add_library(stb_image STATIC ${stb_image_header})
+  set_source_files_properties(${stb_image_header} PROPERTIES LANGUAGE C)
+  set_target_properties(stb_image PROPERTIES EXPORT_COMPILE_COMMANDS OFF)
+  target_compile_definitions(stb_image PRIVATE STB_IMAGE_IMPLEMENTATION)
+  target_include_directories(stb_image PUBLIC ${CMAKE_SOURCE_DIR}/3rdparty)
   target_link_libraries(${exec_func_lib} PUBLIC stb_image)
 endfunction()