if test "x$ac_cv_header_simgear_screen_jpgfactory_hxx" = "xyes"; then
AC_CHECK_LIB(jpeg, jpeg_start_compress)
if test "x$ac_cv_lib_jpeg_jpeg_start_compress" != "xyes" ; then
if test "x$ac_cv_header_simgear_screen_jpgfactory_hxx" = "xyes"; then
AC_CHECK_LIB(jpeg, jpeg_start_compress)
if test "x$ac_cv_lib_jpeg_jpeg_start_compress" != "xyes" ; then