#

# Copyright (c) 2011, 2018, 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.

#

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

# Create a function/macro that takes a series of named arguments. The call is

# similar to AC_DEFUN, but the setup of the function looks like this:

# BASIC_DEFUN_NAMED([MYFUNC], [FOO *BAR], [$@], [

# ... do something

#   AC_MSG_NOTICE([Value of BAR is ARG_BAR])

# ])

# A star (*) in front of a named argument means that it is required and it's

# presence will be verified. To pass e.g. the first value as a normal indexed

# argument, use [m4_shift($@)] as the third argument instead of [$@]. These

# arguments are referenced in the function by their name prefixed by ARG_, e.g.

# "ARG_FOO".

#

# The generated function can be called like this:

# MYFUNC(FOO: [foo-val],

#     BAR: [

#         $ECHO hello world

#     ])

# Note that the argument value must start on the same line as the argument name.

#

# Argument 1: Name of the function to define

# Argument 2: List of legal named arguments, with a * prefix for required arguments

# Argument 3: Argument array to treat as named, typically $@

# Argument 4: The main function body

AC_DEFUN([BASIC_DEFUN_NAMED],

[

  AC_DEFUN($1, [

    m4_foreach(arg, m4_split($2), [

      m4_if(m4_bregexp(arg, [^\*]), -1,

        [

          m4_set_add(legal_named_args, arg)

        ],

        [

          m4_set_add(legal_named_args, m4_substr(arg, 1))

          m4_set_add(required_named_args, m4_substr(arg, 1))

        ]

      )

    ])

    m4_foreach([arg], [$3], [

      m4_define(arg_name, m4_substr(arg, 0, m4_bregexp(arg, [: ])))

      m4_set_contains(legal_named_args, arg_name, [],[AC_MSG_ERROR([Internal error: arg_name is not a valid named argument to [$1]. Valid arguments are 'm4_set_contents(legal_named_args, [ ])'.])])

      m4_set_remove(required_named_args, arg_name)

      m4_set_remove(legal_named_args, arg_name)

      m4_pushdef([ARG_][]arg_name, m4_substr(arg, m4_incr(m4_incr(m4_bregexp(arg, [: ])))))

      m4_set_add(defined_args, arg_name)

      m4_undefine([arg_name])

    ])

    m4_set_empty(required_named_args, [], [

      AC_MSG_ERROR([Internal error: Required named arguments are missing for [$1]. Missing arguments: 'm4_set_contents(required_named_args, [ ])'])

    ])

    m4_foreach([arg], m4_indir([m4_dquote]m4_set_listc([legal_named_args])), [

      m4_pushdef([ARG_][]arg, [])

      m4_set_add(defined_args, arg)

    ])

    m4_set_delete(legal_named_args)

    m4_set_delete(required_named_args)

    # Execute function body

    $4

    m4_foreach([arg], m4_indir([m4_dquote]m4_set_listc([defined_args])), [

      m4_popdef([ARG_][]arg)

    ])

    m4_set_delete(defined_args)

  ])

])

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

# Check if a list of space-separated words are selected only from a list of

# space-separated legal words. Typical use is to see if a user-specified

# set of words is selected from a set of legal words.

#

# Sets the specified variable to list of non-matching (offending) words, or to

# the empty string if all words are matching the legal set.

#

# $1: result variable name

# $2: list of values to check

# $3: list of legal values

AC_DEFUN([BASIC_GET_NON_MATCHING_VALUES],

[

  # grep filter function inspired by a comment to http://stackoverflow.com/a/1617326

  # Notice that the original variant fails on SLES 10 and 11

  values_to_check=`$ECHO $2 | $TR ' ' '\n'`

  legal_values=`$ECHO $3 | $TR ' ' '\n'`

])

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

# Sort a space-separated list, and remove duplicates.

#

# Sets the specified variable to the resulting list.

#

# $1: result variable name

# $2: list of values to sort

AC_DEFUN([BASIC_SORT_LIST],

[

  values_to_sort=`$ECHO $2 | $TR ' ' '\n'`

  result=`$SORT -u <<< "$values_to_sort" | $GREP -v '^$'`

  $1=${result//$'\n'/ }

])

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

# Test if $1 is a valid argument to $3 (often is $JAVA passed as $3)

# If so, then append $1 to $2 \

# Also set JVM_ARG_OK to true/false depending on outcome.

AC_DEFUN([ADD_JVM_ARG_IF_OK],

[

  $ECHO "Check if jvm arg is ok: $1" >&AS_MESSAGE_LOG_FD

  $ECHO "Command: $3 $1 -version" >&AS_MESSAGE_LOG_FD

  OUTPUT=`$3 $1 -version 2>&1`

  FOUND_WARN=`$ECHO "$OUTPUT" | $GREP -i warn`

  FOUND_VERSION=`$ECHO $OUTPUT | $GREP " version \""`

  if test "x$FOUND_VERSION" != x && test "x$FOUND_WARN" = x; then

    $2="[$]$2 $1"

    JVM_ARG_OK=true

  else

    $ECHO "Arg failed:" >&AS_MESSAGE_LOG_FD

    $ECHO "$OUTPUT" >&AS_MESSAGE_LOG_FD

    JVM_ARG_OK=false

  fi

])

# Appends a string to a path variable, only adding the : when needed.

AC_DEFUN([BASIC_APPEND_TO_PATH],

[

  if test "x$2" != x; then

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

      $1="$2"

    else

      $1="[$]$1:$2"

    fi

  fi

])

# Prepends a string to a path variable, only adding the : when needed.

AC_DEFUN([BASIC_PREPEND_TO_PATH],

[

  if test "x$2" != x; then

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

      $1="$2"

    else

      $1="$2:[$]$1"

    fi

  fi

])

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

# This will make sure the given variable points to a full and proper

# path. This means:

# 1) There will be no spaces in the path. On unix platforms,

#    spaces in the path will result in an error. On Windows,

#    the path will be rewritten using short-style to be space-free.

# 2) The path will be absolute, and it will be in unix-style (on

#     cygwin).

# $1: The name of the variable to fix

AC_DEFUN([BASIC_FIXUP_PATH],

[

  # Only process if variable expands to non-empty

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

    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then

      BASIC_FIXUP_PATH_CYGWIN($1)

    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then

      BASIC_FIXUP_PATH_MSYS($1)

    else

      # We're on a unix platform. Hooray! :)

      path="[$]$1"

      has_space=`$ECHO "$path" | $GREP " "`

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

        AC_MSG_NOTICE([The path of $1, which resolves as "$path", is invalid.])

        AC_MSG_ERROR([Spaces are not allowed in this path.])

      fi

      # Use eval to expand a potential ~

      eval path="$path"

      if test ! -f "$path" && test ! -d "$path"; then

        AC_MSG_ERROR([The path of $1, which resolves as "$path", is not found.])

      fi

      if test -d "$path"; then

        $1="`cd "$path"; $THEPWDCMD -L`"

      else

        dir="`$DIRNAME "$path"`"

        base="`$BASENAME "$path"`"

        $1="`cd "$dir"; $THEPWDCMD -L`/$base"

      fi

    fi

  fi

])

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

# This will make sure the given variable points to a executable

# with a full and proper path. This means:

# 1) There will be no spaces in the path. On unix platforms,

#    spaces in the path will result in an error. On Windows,

#    the path will be rewritten using short-style to be space-free.

# 2) The path will be absolute, and it will be in unix-style (on

#     cygwin).

# Any arguments given to the executable is preserved.

# If the input variable does not have a directory specification, then

# it need to be in the PATH.

# $1: The name of the variable to fix

AC_DEFUN([BASIC_FIXUP_EXECUTABLE],

[

  # Only process if variable expands to non-empty

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

    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then

      BASIC_FIXUP_EXECUTABLE_CYGWIN($1)

    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then

      BASIC_FIXUP_EXECUTABLE_MSYS($1)

    else

      # We're on a unix platform. Hooray! :)

      # First separate the path from the arguments. This will split at the first

      # space.

      complete="[$]$1"

      path="${complete%% *}"

      tmp="$complete EOL"

      arguments="${tmp#* }"

      # Cannot rely on the command "which" here since it doesn't always work.

      is_absolute_path=`$ECHO "$path" | $GREP ^/`

      if test -z "$is_absolute_path"; then

        # Path to executable is not absolute. Find it.

        IFS_save="$IFS"

        IFS=:

        for p in $PATH; do

          if test -f "$p/$path" && test -x "$p/$path"; then

            new_path="$p/$path"

            break

          fi

        done

        IFS="$IFS_save"

      else

        # This is an absolute path, we can use it without further modifications.

        new_path="$path"

      fi

      if test "x$new_path" = x; then

        AC_MSG_NOTICE([The path of $1, which resolves as "$complete", is not found.])

        has_space=`$ECHO "$complete" | $GREP " "`

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

          AC_MSG_NOTICE([This might be caused by spaces in the path, which is not allowed.])

        fi

        AC_MSG_ERROR([Cannot locate the the path of $1])

      fi

    fi

    # Now join together the path and the arguments once again

    if test "x$arguments" != xEOL; then

      new_complete="$new_path ${arguments% *}"

    else

      new_complete="$new_path"

    fi

    if test "x$complete" != "x$new_complete"; then

      $1="$new_complete"

      AC_MSG_NOTICE([Rewriting $1 to "$new_complete"])

    fi

  fi

])

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

AC_DEFUN([BASIC_REMOVE_SYMBOLIC_LINKS],

[

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

    # Follow a chain of symbolic links. Use readlink

    # where it exists, else fall back to horribly

    # complicated shell code.

    if test "x$READLINK_TESTED" != yes; then

      # On MacOSX there is a readlink tool with a different

      # purpose than the GNU readlink tool. Check the found readlink.

      READLINK_ISGNU=`$READLINK --version 2>&1 | $GREP GNU`

      # If READLINK_ISGNU is empty, then it's a non-GNU readlink. Don't use it.

      READLINK_TESTED=yes

    fi

    if test "x$READLINK" != x && test "x$READLINK_ISGNU" != x; then

      $1=`$READLINK -f [$]$1`

    else

      # Save the current directory for restoring afterwards

      STARTDIR=$PWD

      COUNTER=0

      sym_link_dir=`$DIRNAME [$]$1`

      sym_link_file=`$BASENAME [$]$1`

      cd $sym_link_dir

      # Use -P flag to resolve symlinks in directories.

      cd `$THEPWDCMD -P`

      sym_link_dir=`$THEPWDCMD -P`

      # Resolve file symlinks

      while test $COUNTER -lt 20; do

        ISLINK=`$LS -l $sym_link_dir/$sym_link_file | $GREP '\->' | $SED -e 's/.*-> \(.*\)/\1/'`

        if test "x$ISLINK" == x; then

          # This is not a symbolic link! We are done!

          break

        fi

        # Again resolve directory symlinks since the target of the just found

        # link could be in a different directory

        cd `$DIRNAME $ISLINK`

        sym_link_dir=`$THEPWDCMD -P`

        sym_link_file=`$BASENAME $ISLINK`

        let COUNTER=COUNTER+1

      done

      cd $STARTDIR

      $1=$sym_link_dir/$sym_link_file

    fi

  fi

])

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

# Register a --with argument but mark it as deprecated

# $1: The name of the with argument to deprecate, not including --with-

AC_DEFUN([BASIC_DEPRECATED_ARG_WITH],

[

  AC_ARG_WITH($1, [AS_HELP_STRING([--with-$1],

      [Deprecated. Option is kept for backwards compatibility and is ignored])],

      [AC_MSG_WARN([Option --with-$1 is deprecated and will be ignored.])])

])

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

# Register a --enable argument but mark it as deprecated

# $1: The name of the with argument to deprecate, not including --enable-

# $2: The name of the argument to deprecate, in shell variable style (i.e. with _ instead of -)

# $3: Messages to user.

AC_DEFUN([BASIC_DEPRECATED_ARG_ENABLE],

[

  AC_ARG_ENABLE($1, [AS_HELP_STRING([--enable-$1],

      [Deprecated. Option is kept for backwards compatibility and is ignored])])

  if test "x$enable_$2" != x; then

    AC_MSG_WARN([Option --enable-$1 is deprecated and will be ignored.])

    if test "x$3" != x; then

      AC_MSG_WARN([$3])

    fi

  fi

])

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

AC_DEFUN_ONCE([BASIC_INIT],

[

  # Save the original command line. This is passed to us by the wrapper configure script.

  AC_SUBST(CONFIGURE_COMMAND_LINE)

  # Save the path variable before it gets changed

  ORIGINAL_PATH="$PATH"

  AC_SUBST(ORIGINAL_PATH)

  DATE_WHEN_CONFIGURED=`LANG=C date`

  AC_SUBST(DATE_WHEN_CONFIGURED)

  AC_MSG_NOTICE([Configuration created at $DATE_WHEN_CONFIGURED.])

])

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

# Test that variable $1 denoting a program is not empty. If empty, exit with an error.

# $1: variable to check

AC_DEFUN([BASIC_CHECK_NONEMPTY],

[

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

    AC_MSG_ERROR([Could not find required tool for $1])

  fi

])

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

# Check that there are no unprocessed overridden variables left.

# If so, they are an incorrect argument and we will exit with an error.

AC_DEFUN([BASIC_CHECK_LEFTOVER_OVERRIDDEN],

[

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

    # Replace the separating ! with spaces before presenting for end user.

    unknown_variables=${CONFIGURE_OVERRIDDEN_VARIABLES//!/ }

    AC_MSG_WARN([The following variables might be unknown to configure: $unknown_variables])

  fi

])

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

# Setup a tool for the given variable. If correctly specified by the user,

# use that value, otherwise search for the tool using the supplied code snippet.

# $1: variable to set

# $2: code snippet to call to look for the tool

# $3: code snippet to call if variable was used to find tool

AC_DEFUN([BASIC_SETUP_TOOL],

[

  # Publish this variable in the help.

  AC_ARG_VAR($1, [Override default value for $1])

  if [[ -z "${$1+x}" ]]; then

    # The variable is not set by user, try to locate tool using the code snippet

    $2

  else

    # The variable is set, but is it from the command line or the environment?

    # Try to remove the string !$1! from our list.

    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!$1!/}

    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then

      # If it failed, the variable was not from the command line. Ignore it,

      # but warn the user (except for BASH, which is always set by the calling BASH).

      if test "x$1" != xBASH; then

        AC_MSG_WARN([Ignoring value of $1 from the environment. Use command line variables instead.])

      fi

      # Try to locate tool using the code snippet

      $2

    else

      # If it succeeded, then it was overridden by the user. We will use it

      # for the tool.

      # First remove it from the list of overridden variables, so we can test

      # for unknown variables in the end.

      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"

      # Check if we try to supply an empty value

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

        AC_MSG_NOTICE([Setting user supplied tool $1= (no value)])

        AC_MSG_CHECKING([for $1])

        AC_MSG_RESULT([disabled])

      else

        # Check if the provided tool contains a complete path.

        tool_specified="[$]$1"

        tool_basename="${tool_specified##*/}"

        if test "x$tool_basename" = "x$tool_specified"; then

          # A command without a complete path is provided, search $PATH.

          AC_MSG_NOTICE([Will search for user supplied tool $1=$tool_basename])

          AC_PATH_PROG($1, $tool_basename)

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

            AC_MSG_ERROR([User supplied tool $tool_basename could not be found])

          fi

        else

          # Otherwise we believe it is a complete path. Use it as it is.

          AC_MSG_NOTICE([Will use user supplied tool $1=$tool_specified])

          AC_MSG_CHECKING([for $1])

          if test ! -x "$tool_specified"; then

            AC_MSG_RESULT([not found])

            AC_MSG_ERROR([User supplied tool $1=$tool_specified does not exist or is not executable])

          fi

          AC_MSG_RESULT([$tool_specified])

        fi

      fi

    fi

    $3

  fi

])

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

# Call BASIC_SETUP_TOOL with AC_PATH_PROGS to locate the tool

# $1: variable to set

# $2: executable name (or list of names) to look for

# $3: [path]

AC_DEFUN([BASIC_PATH_PROGS],

[

  BASIC_SETUP_TOOL($1, [AC_PATH_PROGS($1, $2, , $3)])

])

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

# Call BASIC_SETUP_TOOL with AC_CHECK_TOOLS to locate the tool

# $1: variable to set

# $2: executable name (or list of names) to look for

AC_DEFUN([BASIC_CHECK_TOOLS],

[

  BASIC_SETUP_TOOL($1, [AC_CHECK_TOOLS($1, $2)])