# Execute the check given as argument, and verify the result

# If the Boot JDK was previously found, do nothing

# $1 A command line (typically autoconf macro) to execute

AC_DEFUN([BOOTJDK_DO_CHECK],

  if test "x$BOOT_JDK_FOUND" = xno; then

    # Now execute the test

    $1

    # If previous step claimed to have found a JDK, check it to see if it seems to be valid.

    if test "x$BOOT_JDK_FOUND" = xmaybe; then

      # Do we have a bin/java?

      if test ! -x "$BOOT_JDK/bin/java"; then

        AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/java; ignoring])

        BOOT_JDK_FOUND=no

      else

        # Do we have a bin/javac?

        if test ! -x "$BOOT_JDK/bin/javac"; then

          AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/javac; ignoring])

          AC_MSG_NOTICE([(This might be an JRE instead of an JDK)])

          BOOT_JDK_FOUND=no

        else 

          # Do we have an rt.jar? (On MacOSX it is called classes.jar)

          if test ! -f "$BOOT_JDK/jre/lib/rt.jar" && test ! -f "$BOOT_JDK/../Classes/classes.jar"; then

            AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain an rt.jar; ignoring])

            BOOT_JDK_FOUND=no

          else

            # Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?

            BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | head -n 1`

            # Extra M4 quote needed to protect [] in grep expression.

            [FOUND_VERSION_78=`echo $BOOT_JDK_VERSION | grep  '\"1\.[78]\.'`]

            if test "x$FOUND_VERSION_78" = x; then

              AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring])

              AC_MSG_NOTICE([(Your Boot JDK must be version 7 or 8)])

              BOOT_JDK_FOUND=no

            else

              # We're done! :-)

              BOOT_JDK_FOUND=yes

              SPACESAFE(BOOT_JDK,[the path to the Boot JDK])

              AC_MSG_CHECKING([for Boot JDK])

              AC_MSG_RESULT([$BOOT_JDK ($BOOT_JDK_VERSION)])

            fi # end check jdk version

          fi # end check rt.jar

        fi # end check javac

      fi # end check java

    fi # end check boot jdk found

  fi

])

# Test: Is bootjdk explicitely set by command line arguments?

AC_DEFUN([BOOTJDK_CHECK_ARGUMENTS],

[

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

    BOOT_JDK=$with_boot_jdk

    BOOT_JDK_FOUND=maybe

    AC_MSG_NOTICE([Found potential Boot JDK using configure arguments])

fi

])

# Test: Is bootjdk available from builddeps?

AC_DEFUN([BOOTJDK_CHECK_BUILDDEPS],

[

    BDEPS_CHECK_MODULE(BOOT_JDK, bootjdk, xxx, [BOOT_JDK_FOUND=maybe], [BOOT_JDK_FOUND=no])

])

# Test: Is $JAVA_HOME set?

AC_DEFUN([BOOTJDK_CHECK_JAVA_HOME],

[

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

        if test "x$OPENJDK_TARGET_OS" = xwindows; then

          # On Windows, JAVA_HOME is likely in DOS-style

          JAVA_HOME_PROCESSED="`$CYGPATH -u "$JAVA_HOME"`"

        else

          JAVA_HOME_PROCESSED="$JAVA_HOME"

        fi

        if test ! -d "$JAVA_HOME_PROCESSED"; then

            AC_MSG_NOTICE([Your JAVA_HOME points to a non-existing directory!])

        else

          # Aha, the user has set a JAVA_HOME

          # let us use that as the Boot JDK.

          BOOT_JDK="$JAVA_HOME_PROCESSED"

          BOOT_JDK_FOUND=maybe

          AC_MSG_NOTICE([Found potential Boot JDK using JAVA_HOME])

        fi

# Test: Is there a java or javac in the PATH, which is a symlink to the JDK?

AC_DEFUN([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK],

[

    AC_PATH_PROG(JAVAC_CHECK, javac)

    AC_PATH_PROG(JAVA_CHECK, java)

    BINARY="$JAVAC_CHECK"

    if test "x$JAVAC_CHECK" = x; then

        BINARY="$JAVA_CHECK"

    fi

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

        # So there is a java(c) binary, it might be part of a JDK.

        # Lets find the JDK/JRE directory by following symbolic links.

        # Linux/GNU systems often have links from /usr/bin/java to 

        # /etc/alternatives/java to the real JDK binary.

        SET_FULL_PATH_SPACESAFE(BINARY)

        REMOVE_SYMBOLIC_LINKS(BINARY)

        BOOT_JDK=`dirname "$BINARY"`

        BOOT_JDK=`cd "$BOOT_JDK/.."; pwd`

        if test -x "$BOOT_JDK/bin/javac" && test -x "$BOOT_JDK/bin/java"; then

            # Looks like we found ourselves an JDK

            BOOT_JDK_FOUND=maybe

            AC_MSG_NOTICE([Found potential Boot JDK using java(c) in PATH])

        fi

    fi

])

# Test: Is there a /usr/libexec/java_home? (Typically on MacOSX)

AC_DEFUN([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME],

[

    if test -x /usr/libexec/java_home; then

        BOOT_JDK=`/usr/libexec/java_home`

        BOOT_JDK_FOUND=maybe

        AC_MSG_NOTICE([Found potential Boot JDK using /usr/libexec/java_home])

    fi

])

# Look for a jdk in the given path. If there are multiple, try to select the newest.

# If found, set BOOT_JDK and BOOT_JDK_FOUND.

# $1 = Path to directory containing jdk installations.

# $2 = String to append to the found JDK directory to get the proper JDK home

AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY],

  BOOT_JDK_PREFIX="$1"

  BOOT_JDK_SUFFIX="$2"

  BEST_JDK_FOUND=`$LS "$BOOT_JDK_PREFIX" 2> /dev/null | $GREP jdk | $SORT -r | $HEAD -n 1 `

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

    BOOT_JDK="${BOOT_JDK_PREFIX}/${BEST_JDK_FOUND}${BOOT_JDK_SUFFIX}"

    if test -d "$BOOT_JDK"; then

      BOOT_JDK_FOUND=maybe

      AC_MSG_NOTICE([Found potential Boot JDK using well-known locations (in $BOOT_JDK_PREFIX)])

    fi

  fi

])

# Call BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY, but use the given

# environmental variable as base for where to look.

# $1 Name of an environmal variable, assumed to point to the Program Files directory.

AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY],

[

  if test "x[$]$1" != x; then

    BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([`$CYGPATH -u "[$]$1"`/Java])

  fi

])

# Test: Is there a JDK installed in default, well-known locations?

AC_DEFUN([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS],

[

  if test "x$OPENJDK_TARGET_OS" = xwindows; then

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramW6432])])

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMW6432])])

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMFILES])])

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramFiles])])

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/cygdrive/c/Program Files/Java])])

  elif test "x$OPENJDK_TARGET_OS" = xmacosx; then

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/Library/Java/JavaVirtualMachines],[/Contents/Home])])

    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/System/Library/Java/JavaVirtualMachines],[/Contents/Home])])

  fi

])

# Check that a command-line tool in the Boot JDK is correct

# $1 = name of variable to assign

# $2 = name of binary

AC_DEFUN([BOOTJDK_CHECK_TOOL_IN_BOOTJDK],

[

  AC_MSG_CHECKING([for $2 in Boot JDK])

  $1=$BOOT_JDK/bin/$2

  if test ! -x [$]$1; then

      AC_MSG_RESULT(not found)

      AC_MSG_NOTICE([Your Boot JDK seems broken. This might be fixed by explicitely setting --with-boot-jdk])

      AC_MSG_ERROR([Could not find $2 in the Boot JDK])

  fi

  AC_MSG_RESULT(ok)

# We look for the Boot JDK through various means, going from more certain to

# more of a guess-work. After each test, BOOT_JDK_FOUND is set to "yes" if

# we detected something (if so, the path to the jdk is in BOOT_JDK). But we 

# must check if this is indeed valid; otherwise we'll continue looking.

# Test: Is bootjdk explicitely set by command line arguments?

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_ARGUMENTS])

if test "x$with_boot_jdk" != x && test "x$BOOT_JDK_FOUND" = xno; then

  # Having specified an argument which is incorrect will produce an instant failure;

  # we should not go on looking

  AC_MSG_ERROR([The path given by --with-boot-jdk does not contain a valid Boot JDK])

# Test: Is bootjdk available from builddeps?

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_BUILDDEPS])

# Test: Is $JAVA_HOME set?

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_HOME])

# Test: Is there a /usr/libexec/java_home? (Typically on MacOSX)

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME])

# Test: Is there a java or javac in the PATH, which is a symlink to the JDK?

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK])

# Test: Is there a JDK installed in default, well-known locations?

BOOTJDK_DO_CHECK([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS])

# If we haven't found anything yet, we've truly lost. Give up.

  HELP_MSG_MISSING_DEPENDENCY([openjdk])

  AC_MSG_NOTICE([Could not find a valid Boot JDK. $HELP_MSG])

  AC_MSG_NOTICE([This might be fixed by explicitely setting --with-boot-jdk])

  AC_MSG_ERROR([Cannot continue])

# Setup proper paths for what we found

if test ! -f "$BOOT_RTJAR"; then

    BOOT_RTJAR="$BOOT_JDK/../Classes/classes.jar"

    if test -f "$BOOT_RTJAR"; then

      # Remove the .. 

      BOOT_RTJAR="`cd ${BOOT_RTJAR%/*} && pwd`/${BOOT_RTJAR##*/}"

BOOT_TOOLSJAR="$BOOT_JDK/lib/tools.jar"

BOOT_JDK="$BOOT_JDK"

AC_SUBST(BOOT_JDK)

# Setup tools from the Boot JDK.

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVA,java)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVAC,javac)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVAH,javah)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVAP,javap)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAR,jar)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(RMIC,rmic)

BOOTJDK_CHECK_TOOL_IN_BOOTJDK(NATIVE2ASCII,native2ascii)

# Finally, set some other options...