#
# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

AC_DEFUN_ONCE([LIB_SETUP_INIT],
[

  ###############################################################################
  #
  # OS specific settings that we never will need to probe.
  #
  if test "x$OPENJDK_TARGET_OS" = xlinux; then
    AC_MSG_CHECKING([what is not needed on Linux?])
    PULSE_NOT_NEEDED=yes
    AC_MSG_RESULT([pulse])
  fi

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    AC_MSG_CHECKING([what is not needed on Solaris?])
    ALSA_NOT_NEEDED=yes
    PULSE_NOT_NEEDED=yes
    AC_MSG_RESULT([alsa pulse])
  fi

  if test "x$OPENJDK_TARGET_OS" = xwindows; then
    AC_MSG_CHECKING([what is not needed on Windows?])
    CUPS_NOT_NEEDED=yes
    ALSA_NOT_NEEDED=yes
    PULSE_NOT_NEEDED=yes
    X11_NOT_NEEDED=yes
    AC_MSG_RESULT([alsa cups pulse x11])
  fi

  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
    AC_MSG_CHECKING([what is not needed on MacOSX?])
    ALSA_NOT_NEEDED=yes
    PULSE_NOT_NEEDED=yes
    X11_NOT_NEEDED=yes
    FREETYPE2_NOT_NEEDED=yes
    # If the java runtime framework is disabled, then we need X11.
    # This will be adjusted below.
    AC_MSG_RESULT([alsa pulse x11])
  fi

  if test "x$OPENJDK_TARGET_OS" = xbsd; then
    AC_MSG_CHECKING([what is not needed on bsd?])
    ALSA_NOT_NEEDED=yes
    AC_MSG_RESULT([alsa])
  fi

  if test "x$OPENJDK" = "xfalse"; then
    FREETYPE2_NOT_NEEDED=yes
  fi

  if test "x$SUPPORT_HEADFUL" = xno; then
    X11_NOT_NEEDED=yes
  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
    if test "x$MACOSX_RUNTIME_SUPPORT" != xno; then
      MACOSX_RUNTIME_SUPPORT=yes
      USE_MACOSX_RUNTIME_SUPPORT=yes
      AC_MSG_RESULT([yes, does not need alsa freetype2 pulse and X11])
    else
      AC_MSG_RESULT([yes, but explicitly disabled.])
    fi
  else
    AC_MSG_RESULT([no])
  fi

  if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$USE_MACOSX_RUNTIME_SUPPORT" = xno; then
    AC_MSG_CHECKING([what is not needed on an X11 build on MacOSX?])
    X11_NOT_NEEDED=
    FREETYPE2_NOT_NEEDED=
    AC_MSG_RESULT([alsa pulse])
  fi
])

AC_DEFUN_ONCE([LIB_SETUP_X11],
[

  ###############################################################################
  #
  # 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
    fi
  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
    HELP_MSG_MISSING_DEPENDENCY([x11])
    AC_MSG_ERROR([Could not find X11 libraries. $HELP_MSG])
  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$OPENJDK_TARGET_OS" = xlinux; then
    if test -d "$SYS_ROOT/usr/X11R6"; then
      OPENWIN_HOME="$SYS_ROOT/usr/X11R6"
    elif test -d "$SYS_ROOT/usr/include/X11"; then
      OPENWIN_HOME="$SYS_ROOT/usr"
    fi
  fi
  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    OPENWIN_HOME="/usr/openwin"
  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
  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
    HELP_MSG_MISSING_DEPENDENCY([x11])
    AC_MSG_ERROR([Could not find all X11 headers (shape.h Xrender.h XTest.h Intrinsic.h). $HELP_MSG])
  fi

  AC_SUBST(X_CFLAGS)
  AC_SUBST(X_LIBS)
])

AC_DEFUN_ONCE([LIB_SETUP_CUPS],
[

  ###############################################################################
  #
  # 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)

])

AC_DEFUN_ONCE([LIB_SETUP_FREETYPE],
[

  ###############################################################################
  #
  # 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 $FREETYPE2_LIB_PATH/freetype.dll])
        fi
        USING_SYSTEM_FT_LIB=true
        FREETYPE2_FOUND=yes
      fi
      AC_MSG_RESULT([$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)
])

AC_DEFUN_ONCE([LIB_SETUP_ALSA],
[

  ###############################################################################
  #
  # 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)
])

AC_DEFUN_ONCE([LIB_SETUP_MISC_LIBS],
[

  ###############################################################################
  #
  # Check for the jpeg library
  #

  USE_EXTERNAL_LIBJPEG=true
  AC_CHECK_LIB(jpeg, main, [],
      [ USE_EXTERNAL_LIBJPEG=false
      AC_MSG_NOTICE([Will use jpeg decoder bundled with the OpenJDK source])
  ])
  AC_SUBST(USE_EXTERNAL_LIBJPEG)

  ###############################################################################
  #
  # Check for the gif library
  #

  AC_ARG_WITH(giflib, [AS_HELP_STRING([--with-giflib],
      [use giflib from build system or OpenJDK source (system, bundled) @<:@bundled@:>@])])


  AC_MSG_CHECKING([for which giflib to use])

  # default is bundled
  DEFAULT_GIFLIB=bundled

  #
  # if user didn't specify, use DEFAULT_GIFLIB
  #
  if test "x${with_giflib}" = "x"; then
    with_giflib=${DEFAULT_GIFLIB}
  fi

  AC_MSG_RESULT(${with_giflib})

  if test "x${with_giflib}" = "xbundled"; then
    USE_EXTERNAL_LIBGIF=false
  elif test "x${with_giflib}" = "xsystem"; then
    AC_CHECK_HEADER(gif_lib.h, [],
        [ AC_MSG_ERROR([--with-giflib=system specified, but gif_lib.h not found!])])
    AC_CHECK_LIB(gif, DGifGetCode, [],
        [ AC_MSG_ERROR([--with-giflib=system specified, but no giflib found!])])

    USE_EXTERNAL_LIBGIF=true
  else
    AC_MSG_ERROR([Invalid value of --with-giflib: ${with_giflib}, use 'system' or 'bundled'])
  fi
  AC_SUBST(USE_EXTERNAL_LIBGIF)

  ###############################################################################
  #
  # Check for the zlib library
  #

  AC_ARG_WITH(zlib, [AS_HELP_STRING([--with-zlib],
      [use zlib from build system or OpenJDK source (system, bundled) @<:@bundled@:>@])])

  AC_CHECK_LIB(z, compress,
      [ ZLIB_FOUND=yes ],
      [ ZLIB_FOUND=no ])

  AC_MSG_CHECKING([for which zlib to use])

  DEFAULT_ZLIB=bundled
  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
    #
    # On macosx default is system...on others default is
    #
    DEFAULT_ZLIB=system
  fi

  if test "x${ZLIB_FOUND}" != "xyes"; then
    #
    # If we don't find any system...set default to bundled
    #
    DEFAULT_ZLIB=bundled
  fi

  #
  # If user didn't specify, use DEFAULT_ZLIB
  #
  if test "x${with_zlib}" = "x"; then
    with_zlib=${DEFAULT_ZLIB}
  fi

  if test "x${with_zlib}" = "xbundled"; then
    USE_EXTERNAL_LIBZ=false
    AC_MSG_RESULT([bundled])
  elif test "x${with_zlib}" = "xsystem"; then
    if test "x${ZLIB_FOUND}" = "xyes"; then
      USE_EXTERNAL_LIBZ=true
      AC_MSG_RESULT([system])
    else
      AC_MSG_RESULT([system not found])
      AC_MSG_ERROR([--with-zlib=system specified, but no zlib found!])
    fi
  else
    AC_MSG_ERROR([Invalid value for --with-zlib: ${with_zlib}, use 'system' or 'bundled'])
  fi

  AC_SUBST(USE_EXTERNAL_LIBZ)

  ###############################################################################
  LIBZIP_CAN_USE_MMAP=true

  AC_SUBST(LIBZIP_CAN_USE_MMAP)

  ###############################################################################
  #
  # Check if altzone exists in time.h
  #

  AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>], [return (int)altzone;])],
      [has_altzone=yes],
      [has_altzone=no])
  if test "x$has_altzone" = xyes; then
    AC_DEFINE([HAVE_ALTZONE], 1, [Define if you have the external 'altzone' variable in time.h])
  fi

  ###############################################################################
  #
  # Check the maths library
  #

  AC_CHECK_LIB(m, cos, [],
      [
        AC_MSG_NOTICE([Maths library was not found])
      ]
  )
  AC_SUBST(LIBM)

  ###############################################################################
  #
  # Check for libdl.so

  save_LIBS="$LIBS"
  LIBS=""
  AC_CHECK_LIB(dl,dlopen)
  LIBDL="$LIBS"
  AC_SUBST(LIBDL)
  LIBS="$save_LIBS"
])

AC_DEFUN_ONCE([LIB_SETUP_STATIC_LINK_LIBSTDCPP],
[
  ###############################################################################
  #
  # statically link libstdc++ before C++ ABI is stablized on Linux unless
  # dynamic build is configured on command line.
  #
  AC_ARG_WITH([stdc++lib], [AS_HELP_STRING([--with-stdc++lib=<static>,<dynamic>,<default>],
      [force linking of the C++ runtime on Linux to either static or dynamic, default is static with dynamic as fallback])],
      [
        if test "x$with_stdc__lib" != xdynamic && test "x$with_stdc__lib" != xstatic \
                && test "x$with_stdc__lib" != xdefault; then
          AC_MSG_ERROR([Bad parameter value --with-stdc++lib=$with_stdc__lib!])
        fi
      ],
      [with_stdc__lib=default]
  )

  if test "x$OPENJDK_TARGET_OS" = xlinux; then
    # Test if -lstdc++ works.
    AC_MSG_CHECKING([if dynamic link of stdc++ is possible])
    AC_LANG_PUSH(C++)
    OLD_CXXFLAGS="$CXXFLAGS"
    CXXFLAGS="$CXXFLAGS -lstdc++"
    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
        [has_dynamic_libstdcxx=yes],
        [has_dynamic_libstdcxx=no])
    CXXFLAGS="$OLD_CXXFLAGS"
    AC_LANG_POP(C++)
    AC_MSG_RESULT([$has_dynamic_libstdcxx])

    # Test if stdc++ can be linked statically.
    AC_MSG_CHECKING([if static link of stdc++ is possible])
    STATIC_STDCXX_FLAGS="-Wl,-Bstatic -lstdc++ -lgcc -Wl,-Bdynamic"
    AC_LANG_PUSH(C++)
    OLD_LIBS="$LIBS"
    OLD_CXX="$CXX"
    LIBS="$STATIC_STDCXX_FLAGS"
    CXX="$CC"
    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
        [has_static_libstdcxx=yes],
        [has_static_libstdcxx=no])
    LIBS="$OLD_LIBS"
    CXX="$OLD_CXX"
    AC_LANG_POP(C++)
    AC_MSG_RESULT([$has_static_libstdcxx])

    if test "x$has_static_libstdcxx" = xno && test "x$has_dynamic_libstdcxx" = xno; then
      AC_MSG_ERROR([Cannot link to stdc++, neither dynamically nor statically!])
    fi

    if test "x$with_stdc__lib" = xstatic && test "x$has_static_libstdcxx" = xno; then
      AC_MSG_ERROR([Static linking of libstdc++ was not possible!])
    fi

    if test "x$with_stdc__lib" = xdynamic && test "x$has_dynamic_libstdcxx" = xno; then
      AC_MSG_ERROR([Dynamic linking of libstdc++ was not possible!])
    fi

    AC_MSG_CHECKING([how to link with libstdc++])
    # If dynamic was requested, it's available since it would fail above otherwise.
    # If dynamic wasn't requested, go with static unless it isn't available.
    if test "x$with_stdc__lib" = xdynamic || test "x$has_static_libstdcxx" = xno || test "x$JVM_VARIANT_ZEROSHARK" = xtrue; then
      LIBCXX="$LIBCXX -lstdc++"
      LDCXX="$CXX"
      STATIC_CXX_SETTING="STATIC_CXX=false"
      AC_MSG_RESULT([dynamic])
    else
      LIBCXX="$LIBCXX $STATIC_STDCXX_FLAGS"
      LDCXX="$CC"
      STATIC_CXX_SETTING="STATIC_CXX=true"
      AC_MSG_RESULT([static])
    fi
  fi
  AC_SUBST(STATIC_CXX_SETTING)

  if test "x$JVM_VARIANT_ZERO" = xtrue || test "x$JVM_VARIANT_ZEROSHARK" = xtrue; then
    # Figure out LIBFFI_CFLAGS and LIBFFI_LIBS
    PKG_CHECK_MODULES([LIBFFI], [libffi])

  fi

  if test "x$JVM_VARIANT_ZEROSHARK" = xtrue; then
    AC_CHECK_PROG([LLVM_CONFIG], [llvm-config], [llvm-config])

    if test "x$LLVM_CONFIG" != xllvm-config; then
      AC_MSG_ERROR([llvm-config not found in $PATH.])
    fi

    llvm_components="jit mcjit engine nativecodegen native"
    unset LLVM_CFLAGS
    for flag in $("$LLVM_CONFIG" --cxxflags); do
      if echo "${flag}" | grep -q '^-@<:@ID@:>@'; then
        if test "${flag}" != "-D_DEBUG" ; then
          if test "${LLVM_CFLAGS}" != "" ; then
            LLVM_CFLAGS="${LLVM_CFLAGS} "
          fi
          LLVM_CFLAGS="${LLVM_CFLAGS}${flag}"
        fi
      fi
    done
    llvm_version=$("${LLVM_CONFIG}" --version | sed 's/\.//; s/svn.*//')
    LLVM_CFLAGS="${LLVM_CFLAGS} -DSHARK_LLVM_VERSION=${llvm_version}"

    unset LLVM_LDFLAGS
    for flag in $("${LLVM_CONFIG}" --ldflags); do
      if echo "${flag}" | grep -q '^-L'; then
        if test "${LLVM_LDFLAGS}" != ""; then
          LLVM_LDFLAGS="${LLVM_LDFLAGS} "
        fi
        LLVM_LDFLAGS="${LLVM_LDFLAGS}${flag}"
      fi
    done

    unset LLVM_LIBS
    for flag in $("${LLVM_CONFIG}" --libs ${llvm_components}); do
      if echo "${flag}" | grep -q '^-l'; then
        if test "${LLVM_LIBS}" != ""; then
          LLVM_LIBS="${LLVM_LIBS} "
        fi
        LLVM_LIBS="${LLVM_LIBS}${flag}"
      fi
    done

    AC_SUBST(LLVM_CFLAGS)
    AC_SUBST(LLVM_LDFLAGS)
    AC_SUBST(LLVM_LIBS)
  fi

  # libCrun is the c++ runtime-library with SunStudio (roughly the equivalent of gcc's libstdc++.so)
  if test "x$OPENJDK_TARGET_OS" = xsolaris && test "x$LIBCXX" = x; then
    LIBCXX="/usr/lib${OPENJDK_TARGET_CPU_ISADIR}/libCrun.so.1"
  fi

  # TODO better (platform agnostic) test
  if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$LIBCXX" = x && test "x$GCC" = xyes; then
    LIBCXX="-lstdc++"
  fi

  AC_SUBST(LIBCXX)
])