623   USE_EXTERNAL_LIBJPEG=true

   623   AC_ARG_WITH(libjpeg, [AS_HELP_STRING([--with-libjpeg],

   624   AC_CHECK_LIB(jpeg, main, [],

   624       [use libjpeg from build system or OpenJDK source (system, bundled) @<:@bundled@:>@])])

   625       [ USE_EXTERNAL_LIBJPEG=false

   625 

   626       AC_MSG_NOTICE([Will use jpeg decoder bundled with the OpenJDK source])

   626   AC_MSG_CHECKING([for which libjpeg to use])

   627   ])

   627 

   628   # default is bundled

   629   DEFAULT_LIBJPEG=bundled

   630 

   631   #

   632   # if user didn't specify, use DEFAULT_LIBJPEG

   633   #

   634   if test "x${with_libjpeg}" = "x"; then

   635     with_libjpeg=${DEFAULT_LIBJPEG}

   636   fi

   637 

   638   AC_MSG_RESULT(${with_libjpeg})

   639 

   640   if test "x${with_libjpeg}" = "xbundled"; then

   641     USE_EXTERNAL_LIBJPEG=false

   642   elif test "x${with_libjpeg}" = "xsystem"; then

   643     AC_CHECK_HEADER(jpeglib.h, [],

   644         [ AC_MSG_ERROR([--with-libjpeg=system specified, but jpeglib.h not found!])])

   645     AC_CHECK_LIB(jpeg, jpeg_CreateDecompress, [],

   646         [ AC_MSG_ERROR([--with-libjpeg=system specified, but no libjpeg found])])

   647 

   648     USE_EXTERNAL_LIBJPEG=true

   649   else

   650     AC_MSG_ERROR([Invalid use of --with-libjpeg: ${with_libjpeg}, use 'system' or 'bundled'])

   651   fi

   652