###############################################################################

  #

  # OS specific settings that we never will need to probe.

  #

  if test "x$OPENJDK_TARGET_OS" = xlinux; then

  fi

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then

  fi

  if test "x$OPENJDK_TARGET_OS" = xwindows; then

    CUPS_NOT_NEEDED=yes

  fi

  if test "x$OPENJDK_TARGET_OS" = xmacosx; then

    FREETYPE2_NOT_NEEDED=yes

  fi

  if test "x$OPENJDK_TARGET_OS" = xbsd; then

    AC_MSG_RESULT([alsa])

  fi

  if test "x$OPENJDK" = "xfalse"; then

  fi

  if test "x$SUPPORT_HEADFUL" = xno; then

  fi

  ###############################################################################

  #

  # Check for MacOSX support for OpenJDK. If this exists, try to build a JVM

  # that uses this API.

  #

  AC_ARG_ENABLE([macosx-runtime-support], [AS_HELP_STRING([--disable-macosx-runtime-support],

      [disable the use of MacOSX Java runtime support framework @<:@enabled@:>@])],

      [MACOSX_RUNTIME_SUPPORT="${enableval}"],[MACOSX_RUNTIME_SUPPORT="no"])

  USE_MACOSX_RUNTIME_SUPPORT=no

  AC_MSG_CHECKING([for explicit Java runtime support in the OS])

  if test -f /System/Library/Frameworks/JavaVM.framework/Frameworks/JavaRuntimeSupport.framework/Headers/JavaRuntimeSupport.h; then

      MACOSX_RUNTIME_SUPPORT=yes

      USE_MACOSX_RUNTIME_SUPPORT=yes

      AC_MSG_RESULT([yes, does not need alsa freetype2 pulse and X11])

      AC_MSG_RESULT([yes, but explicitly disabled.])

  else

  fi

  if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$USE_MACOSX_RUNTIME_SUPPORT" = xno; then

  fi

  ###############################################################################

  #

  # Check for X Windows

  #

  # Check if the user has specified sysroot, but not --x-includes or --x-libraries.

  # Make a simple check for the libraries at the sysroot, and setup --x-includes and

  # --x-libraries for the sysroot, if that seems to be correct.

  if test "x$SYS_ROOT" != "x/"; then

    if test "x$x_includes" = xNONE; then

      if test -f "$SYS_ROOT/usr/X11R6/include/X11/Xlib.h"; then

        x_includes="$SYS_ROOT/usr/X11R6/include"

      elif test -f "$SYS_ROOT/usr/include/X11/Xlib.h"; then

        x_includes="$SYS_ROOT/usr/include"

      fi

    fi

    if test "x$x_libraries" = xNONE; then

      if test -f "$SYS_ROOT/usr/X11R6/lib/libX11.so"; then

        x_libraries="$SYS_ROOT/usr/X11R6/lib"

      elif test "$SYS_ROOT/usr/lib64/libX11.so" && test "x$OPENJDK_TARGET_CPU_BITS" = x64; then

        x_libraries="$SYS_ROOT/usr/lib64"

      elif test -f "$SYS_ROOT/usr/lib/libX11.so"; then

        x_libraries="$SYS_ROOT/usr/lib"

      fi

  # Now let autoconf do it's magic

  AC_PATH_X

  AC_PATH_XTRA

  # AC_PATH_XTRA creates X_LIBS and sometimes adds -R flags. When cross compiling

  # this doesn't make sense so we remove it.

  if test "x$COMPILE_TYPE" = xcross; then

    X_LIBS=`$ECHO $X_LIBS | $SED 's/-R \{0,1\}[[^ ]]*//g'`

  fi

  if test "x$no_x" = xyes && test "x$X11_NOT_NEEDED" != xyes; then

  fi

  # Some of the old makefiles require a setting of OPENWIN_HOME

  # Since the X11R6 directory has disappeared on later Linuxes,

  # we need to probe for it.

  if test "x$OPENJDK_TARGET_OS" = xlinux; then

      OPENWIN_HOME="$SYS_ROOT/usr/X11R6"

      OPENWIN_HOME="$SYS_ROOT/usr"

  fi

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then

  fi

  AC_SUBST(OPENWIN_HOME)

  #

  # Weird Sol10 something check...TODO change to try compile

  #

  if test "x${OPENJDK_TARGET_OS}" = xsolaris; then

    if test "`uname -r`" = "5.10"; then

      if test "`${EGREP} -c XLinearGradient ${OPENWIN_HOME}/share/include/X11/extensions/Xrender.h`" = "0"; then

        X_CFLAGS="${X_CFLAGS} -DSOLARIS10_NO_XRENDER_STRUCTS"

      fi

    fi

  AC_LANG_PUSH(C)

  OLD_CFLAGS="$CFLAGS"

  CFLAGS="$CFLAGS $X_CFLAGS"

  # Need to include Xlib.h and Xutil.h to avoid "present but cannot be compiled" warnings on Solaris 10

  AC_CHECK_HEADERS([X11/extensions/shape.h X11/extensions/Xrender.h X11/extensions/XTest.h X11/Intrinsic.h],

      [X11_A_OK=yes],

      [X11_A_OK=no; break],

      [

        # include <X11/Xlib.h>

        # include <X11/Xutil.h>

      ]

  )

  CFLAGS="$OLD_CFLAGS"

  AC_LANG_POP(C)

  if test "x$X11_A_OK" = xno && test "x$X11_NOT_NEEDED" != xyes; then

  fi

  AC_SUBST(X_CFLAGS)

  AC_SUBST(X_LIBS)

  ###############################################################################

  #

  # The common unix printing system cups is used to print from java.

  #

  AC_ARG_WITH(cups, [AS_HELP_STRING([--with-cups],

      [specify prefix directory for the cups package

      (expecting the headers under PATH/include)])])

  AC_ARG_WITH(cups-include, [AS_HELP_STRING([--with-cups-include],

      [specify directory for the cups include files])])

  if test "x$CUPS_NOT_NEEDED" = xyes; then

    if test "x${with_cups}" != x || test "x${with_cups_include}" != x; then

      AC_MSG_WARN([cups not used, so --with-cups is ignored])

    fi

    CUPS_CFLAGS=

  else

    CUPS_FOUND=no

    if test "x${with_cups}" = xno || test "x${with_cups_include}" = xno; then

      AC_MSG_ERROR([It is not possible to disable the use of cups. Remove the --without-cups option.])

    fi

    if test "x${with_cups}" != x; then

      CUPS_CFLAGS="-I${with_cups}/include"

      CUPS_FOUND=yes

    fi

    if test "x${with_cups_include}" != x; then

      CUPS_CFLAGS="-I${with_cups_include}"

      CUPS_FOUND=yes

    fi

    if test "x$CUPS_FOUND" = xno; then

      BDEPS_CHECK_MODULE(CUPS, cups, xxx, [CUPS_FOUND=yes])

    fi

    if test "x$CUPS_FOUND" = xno; then

      # Are the cups headers installed in the default /usr/include location?

      AC_CHECK_HEADERS([cups/cups.h cups/ppd.h],

          [

            CUPS_FOUND=yes

            CUPS_CFLAGS=

            DEFAULT_CUPS=yes

          ]

      )

    fi

    if test "x$CUPS_FOUND" = xno; then

      # Getting nervous now? Lets poke around for standard Solaris third-party

      # package installation locations.

      AC_MSG_CHECKING([for cups headers])

      if test -s /opt/sfw/cups/include/cups/cups.h; then

        # An SFW package seems to be installed!

        CUPS_FOUND=yes

        CUPS_CFLAGS="-I/opt/sfw/cups/include"

      elif test -s /opt/csw/include/cups/cups.h; then

        # A CSW package seems to be installed!

        CUPS_FOUND=yes

        CUPS_CFLAGS="-I/opt/csw/include"

      fi

      AC_MSG_RESULT([$CUPS_FOUND])

    fi

    if test "x$CUPS_FOUND" = xno; then

      HELP_MSG_MISSING_DEPENDENCY([cups])

      AC_MSG_ERROR([Could not find cups! $HELP_MSG ])

    fi

  fi

  AC_SUBST(CUPS_CFLAGS)

  ###############################################################################

  #

  # The ubiquitous freetype2 library is used to render fonts.

  #

  AC_ARG_WITH(freetype, [AS_HELP_STRING([--with-freetype],

      [specify prefix directory for the freetype2 package

      (expecting the libraries under PATH/lib and the headers under PATH/include)])])

  # If we are using the OS installed system lib for freetype, then we do not need to copy it to the build tree

  USING_SYSTEM_FT_LIB=false

  if test "x$FREETYPE2_NOT_NEEDED" = xyes; then

    if test "x$with_freetype" != x || test "x$with_freetype_include" != x || test "x$with_freetype_lib" != x; then

      AC_MSG_WARN([freetype not used, so --with-freetype is ignored])

    fi

    FREETYPE2_CFLAGS=

    FREETYPE2_LIBS=

    FREETYPE2_LIB_PATH=

  else

    FREETYPE2_FOUND=no

    if test "x$with_freetype" != x; then

      BASIC_FIXUP_PATH(with_freetype)

      FREETYPE2_LIBS="-L$with_freetype/lib -lfreetype"

      FREETYPE2_LIB_PATH="$with_freetype/lib"

      if test "x$OPENJDK_TARGET_OS" = xsolaris && test "x$OPENJDK_TARGET_CPU" = xx86_64 && test -d "$with_freetype/lib/amd64"; then

        FREETYPE2_LIBS="-L$with_freetype/lib/amd64 -lfreetype"

        FREETYPE2_LIB_PATH="$with_freetype/lib/amd64"

      fi

      if test "x$OPENJDK_TARGET_OS" = xwindows; then

        FREETYPE2_LIBS="$with_freetype/lib/freetype.lib"

      fi

      FREETYPE2_CFLAGS="-I$with_freetype/include"

      if test -s $with_freetype/include/ft2build.h && test -d $with_freetype/include/freetype2/freetype; then

        FREETYPE2_CFLAGS="-I$with_freetype/include/freetype2 -I$with_freetype/include"

      fi

      FREETYPE2_FOUND=yes

      if test "x$FREETYPE2_FOUND" = xyes; then

        # Verify that the directories exist

        if ! test -d "$with_freetype/lib" || ! test -d "$with_freetype/include"; then

          AC_MSG_ERROR([Could not find the expected directories $with_freetype/lib and $with_freetype/include])

        fi

        # List the contents of the lib.

        FREETYPELIB=`ls $with_freetype/lib/libfreetype.so $with_freetype/lib/freetype.dll 2> /dev/null`

        if test "x$FREETYPELIB" = x; then

          AC_MSG_ERROR([Could not find libfreetype.so nor freetype.dll in $with_freetype/lib])

        fi

        # Check one h-file

        if ! test -s "$with_freetype/include/ft2build.h"; then

          AC_MSG_ERROR([Could not find $with_freetype/include/ft2build.h])

        fi

      fi

    fi

    if test "x$FREETYPE2_FOUND" = xno; then

      BDEPS_CHECK_MODULE(FREETYPE2, freetype2, xxx, [FREETYPE2_FOUND=yes], [FREETYPE2_FOUND=no])

      USING_SYSTEM_FT_LIB=true

    fi

    if test "x$FREETYPE2_FOUND" = xno && test "x$OPENJDK_TARGET_OS" = xwindows; then

      FREETYPELOCATION="$PROGRAMFILES/GnuWin32"

      BASIC_FIXUP_PATH(FREETYPELOCATION)

      AC_MSG_CHECKING([for freetype in some standard windows locations])

      if test -s "$FREETYPELOCATION/include/ft2build.h" && test -d "$FREETYPELOCATION/include/freetype2/freetype"; then

        FREETYPE2_CFLAGS="-I$FREETYPELOCATION/include/freetype2 -I$FREETYPELOCATION/include"

        FREETYPE2_LIBS="$FREETYPELOCATION/lib/freetype.lib"

        FREETYPE2_LIB_PATH="$FREETYPELOCATION/lib"

        if ! test -s "$FREETYPE2_LIBS"; then

          AC_MSG_ERROR([Could not find $FREETYPE2_LIBS])

        fi

        if ! test -s "$FREETYPE2_LIB_PATH/freetype.dll"; then

          AC_MSG_ERROR([Could not find $FREETYPE2_LIB_PATH/freetype.dll])

        USING_SYSTEM_FT_LIB=true

        FREETYPE2_FOUND=yes

      fi

      AC_MSG_RESULT([$FREETYPE2_FOUND])

    fi

    if test "x$FREETYPE2_FOUND" = xno; then

      PKG_CHECK_MODULES(FREETYPE2, freetype2, [FREETYPE2_FOUND=yes], [FREETYPE2_FOUND=no])

      # On solaris, pkg_check adds -lz to freetype libs, which isn't necessary for us.

      FREETYPE2_LIBS=`$ECHO $FREETYPE2_LIBS | $SED 's/-lz//g'`

      USING_SYSTEM_FT_LIB=true

      # 64-bit libs for Solaris x86 are installed in the amd64 subdirectory, change lib to lib/amd64

      if test "x$FREETYPE2_FOUND" = xyes && test "x$OPENJDK_TARGET_OS" = xsolaris && test "x$OPENJDK_TARGET_CPU" = xx86_64; then

        FREETYPE2_LIBS=`$ECHO $FREETYPE2_LIBS | $SED 's?/lib?/lib/amd64?g'`

      fi

    fi

    if test "x$FREETYPE2_FOUND" = xno; then

      AC_MSG_CHECKING([for freetype in some standard locations])

      if test -s $SYS_ROOT/usr/X11/include/ft2build.h && test -d $SYS_ROOT/usr/X11/include/freetype2/freetype; then

        DEFAULT_FREETYPE_CFLAGS="-I$SYS_ROOT/usr/X11/include/freetype2 -I$SYS_ROOT/usr/X11/include"

        DEFAULT_FREETYPE_LIBS="-L$SYS_ROOT/usr/X11/lib -lfreetype"

      fi

      if test -s $SYS_ROOT/usr/include/ft2build.h && test -d $SYS_ROOT/usr/include/freetype2/freetype; then

        DEFAULT_FREETYPE_CFLAGS="-I$SYS_ROOT/usr/include/freetype2"

        DEFAULT_FREETYPE_LIBS="-lfreetype"

      fi

      PREV_CXXCFLAGS="$CXXFLAGS"

      PREV_LDFLAGS="$LDFLAGS"

      CXXFLAGS="$CXXFLAGS $DEFAULT_FREETYPE_CFLAGS"

      LDFLAGS="$LDFLAGS $DEFAULT_FREETYPE_LIBS"

      AC_LINK_IFELSE([AC_LANG_SOURCE([[

            #include<ft2build.h>

            #include FT_FREETYPE_H

            int main() { return 0; }

          ]])],

          [

            # Yes, the default cflags and libs did the trick.

            FREETYPE2_FOUND=yes

            FREETYPE2_CFLAGS="$DEFAULT_FREETYPE_CFLAGS"

            FREETYPE2_LIBS="$DEFAULT_FREETYPE_LIBS"

          ],

          [

            FREETYPE2_FOUND=no

          ]

      )

      CXXCFLAGS="$PREV_CXXFLAGS"

      LDFLAGS="$PREV_LDFLAGS"

      AC_MSG_RESULT([$FREETYPE2_FOUND])

      USING_SYSTEM_FT_LIB=true

    fi

    if test "x$FREETYPE2_FOUND" = xno; then

      HELP_MSG_MISSING_DEPENDENCY([freetype2])

      AC_MSG_ERROR([Could not find freetype2! $HELP_MSG ])

    fi

    if test "x$OPENJDK_TARGET_OS" != xwindows; then

      # AC_CHECK_LIB does not support use of cl.exe

      PREV_LDFLAGS="$LDFLAGS"

      LDFLAGS="$FREETYPE2_LIBS"

      AC_CHECK_LIB(freetype, FT_Init_FreeType,

          FREETYPE2_FOUND=true,

          AC_MSG_ERROR([Could not find freetype2! $HELP_MSG ]))

      LDFLAGS="$PREV_LDFLAGS"

    fi

  fi

  AC_SUBST(USING_SYSTEM_FT_LIB)

  AC_SUBST(FREETYPE2_LIB_PATH)

  AC_SUBST(FREETYPE2_CFLAGS)

  AC_SUBST(FREETYPE2_LIBS)

  ###############################################################################

  #

  # Check for alsa headers and libraries. Used on Linux/GNU systems.

  #

  AC_ARG_WITH(alsa, [AS_HELP_STRING([--with-alsa],

      [specify prefix directory for the alsa package

      (expecting the libraries under PATH/lib and the headers under PATH/include)])])

  AC_ARG_WITH(alsa-include, [AS_HELP_STRING([--with-alsa-include],

      [specify directory for the alsa include files])])

  AC_ARG_WITH(alsa-lib, [AS_HELP_STRING([--with-alsa-lib],

      [specify directory for the alsa library])])

  if test "x$ALSA_NOT_NEEDED" = xyes; then

    if test "x${with_alsa}" != x || test "x${with_alsa_include}" != x || test "x${with_alsa_lib}" != x; then

      AC_MSG_WARN([alsa not used, so --with-alsa is ignored])

    fi

    ALSA_CFLAGS=

    ALSA_LIBS=

  else

    ALSA_FOUND=no

    if test "x${with_alsa}" = xno || test "x${with_alsa_include}" = xno || test "x${with_alsa_lib}" = xno; then

      AC_MSG_ERROR([It is not possible to disable the use of alsa. Remove the --without-alsa option.])

    fi

    if test "x${with_alsa}" != x; then

      ALSA_LIBS="-L${with_alsa}/lib -lalsa"

      ALSA_CFLAGS="-I${with_alsa}/include"

      ALSA_FOUND=yes

    fi

    if test "x${with_alsa_include}" != x; then

      ALSA_CFLAGS="-I${with_alsa_include}"

      ALSA_FOUND=yes

    fi

    if test "x${with_alsa_lib}" != x; then

      ALSA_LIBS="-L${with_alsa_lib} -lalsa"

      ALSA_FOUND=yes

    fi

    if test "x$ALSA_FOUND" = xno; then

      BDEPS_CHECK_MODULE(ALSA, alsa, xxx, [ALSA_FOUND=yes], [ALSA_FOUND=no])

    fi

    if test "x$ALSA_FOUND" = xno; then

      PKG_CHECK_MODULES(ALSA, alsa, [ALSA_FOUND=yes], [ALSA_FOUND=no])

    fi

    if test "x$ALSA_FOUND" = xno; then

      AC_CHECK_HEADERS([alsa/asoundlib.h],

          [

            ALSA_FOUND=yes

            ALSA_CFLAGS=-Iignoreme

            ALSA_LIBS=-lasound

            DEFAULT_ALSA=yes

          ],

          [ALSA_FOUND=no])

    fi

    if test "x$ALSA_FOUND" = xno; then

      HELP_MSG_MISSING_DEPENDENCY([alsa])

      AC_MSG_ERROR([Could not find alsa! $HELP_MSG ])

    fi

  fi

  AC_SUBST(ALSA_CFLAGS)

  AC_SUBST(ALSA_LIBS)