cmake HAVE_APPROPRIATE_LIBJPEG_VERSION examples

tjko/jpegoptim CMakeLists.txt :399

check_c_source_compiles(
            "
            #include <stdio.h>
            #include <jpeglib.h>
            int main(void)
            {
              return sizeof (&jpeg_read_header);
            }
            "
            HAVE_APPROPRIATE_LIBJPEG_VERSION
    )