include(CheckCXXSymbolExists)

set(CMAKE_REQUIRED_INCLUDES_SAVE "${CMAKE_REQUIRED_INCLUDES}")
set(CMAKE_REQUIRED_LIBRARIES_SAVE "${CMAKE_REQUIRED_LIBRARIES}")
set(CMAKE_REQUIRED_FLAGS_SAVE "${CMAKE_REQUIRED_FLAGS}")

# Workaround cmake-3.25 bug.
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wno-newline-eof")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wno-old-style-cast")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wno-unsafe-buffer-usage")

set(CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES_SAVE};${JPEG_INCLUDE_DIRS}")
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES_SAVE};${JPEG_LIBRARIES}")

CHECK_CXX_SYMBOL_EXISTS(jpeg_mem_src "cstdio;jpeglib.h" HAVE_JPEG_MEM_SRC)

set(CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES_SAVE}")
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES_SAVE}")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE}")