#!/bin/bash

#

# Copyright (c) 2012, 2019, 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.

#

# 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.

#

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

  echo "ERROR: Calling this wrapper script directly is not supported."

  echo "Use the 'configure' script in the top-level directory instead."

  exit 1

fi

# The next argument is the absolute top-level directory path.

# The TOPDIR variable is passed on to configure.ac.

TOPDIR="$2"

# Remove these two arguments to get to the user supplied arguments

shift

shift

if test "x$BASH" = x; then

  echo "Error: This script must be run using bash." 1>&2

  exit 1

fi

# Force autoconf to use bash. This also means we must disable autoconf re-exec.

export CONFIG_SHELL=$BASH

export _as_can_reexec=no

# Make sure all shell commands are executed with the C locale

export LC_ALL=C

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

  custom_hook=$CUSTOM_CONFIG_DIR/custom-hook.m4

  if test ! -e $custom_hook; then

    echo "CUSTOM_CONFIG_DIR not pointing to a proper custom config dir."

    echo "Error: Cannot continue" 1>&2

    exit 1

  fi

fi

CURRENT_DIR=`pwd`

if test "x$CURRENT_DIR" = "x$TOPDIR"; then

  # We are running configure from the src root.

  # Create '.configure-support' under $TOPDIR/build

  build_support_dir="$TOPDIR/build/.configure-support"

elif test "x$CURRENT_DIR" = "x$CUSTOM_ROOT"; then

  # We are running configure from the custom root.

  # Create '.configure-support' under $CUSTOM_ROOT/build

  build_support_dir="$CUSTOM_ROOT/build/.configure-support"

else

  # We are running configure from outside of the src dir.

  # Create 'build_support_dir' in the current directory.

  build_support_dir="$CURRENT_DIR/configure-support"

fi

conf_script_dir="$TOPDIR/make/autoconf"

generated_script="$build_support_dir/generated-configure.sh"

###

### Use autoconf to create a runnable configure script, if needed

###

autoconf_missing_help() {

  APT_GET="`which apt-get 2> /dev/null | grep -v '^no apt-get in'`"

  YUM="`which yum 2> /dev/null | grep -v '^no yum in'`"

  BREW="`which brew 2> /dev/null | grep -v '^no brew in'`"

  ZYPPER="`which zypper 2> /dev/null | grep -v '^no zypper in'`"

  CYGWIN="`which cygpath 2> /dev/null | grep -v '^no cygpath in'`"

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

    PKGHANDLER_COMMAND="sudo zypper install autoconf"

  elif test "x$APT_GET" != x; then

    PKGHANDLER_COMMAND="sudo apt-get install autoconf"

  elif test "x$YUM" != x; then

    PKGHANDLER_COMMAND="sudo yum install autoconf"

  elif test "x$BREW" != x; then

    PKGHANDLER_COMMAND="brew install autoconf"

  elif test "x$CYGWIN" != x; then

    PKGHANDLER_COMMAND="( cd <location of cygwin setup.exe> && cmd /c setup -q -P autoconf )"

  fi

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

    echo "You might be able to fix this by running '$PKGHANDLER_COMMAND'."

  fi

}

generate_configure_script() {

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

    if test ! -x "$AUTOCONF"; then

      echo

      echo "The specified AUTOCONF variable does not point to a valid autoconf executable:"

      echo "AUTOCONF=$AUTOCONF"

      echo "Error: Cannot continue" 1>&2

      exit 1

    fi

  else

    AUTOCONF="`which autoconf 2> /dev/null | grep -v '^no autoconf in'`"

    if test "x$AUTOCONF" = x; then

      echo

      echo "Autoconf is not found on the PATH, and AUTOCONF is not set."

      echo "You need autoconf to be able to generate a runnable configure script."

      autoconf_missing_help

      echo "Error: Cannot find autoconf" 1>&2

      exit 1

    fi

  fi

  autoconf_version=`$AUTOCONF --version | head -1`

  echo "Using autoconf at ${AUTOCONF} [$autoconf_version]"

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

    # Generate configure script with custom hooks compiled in.

    custom_patcher='sed -e "s|#CUSTOM_AUTOCONF_INCLUDE|m4_include([$custom_hook])|"'

    custom_script_dir_include="-I$CUSTOM_CONFIG_DIR"

  else

    custom_patcher='cat'

    custom_script_dir_include=""

  fi

  mkdir -p $build_support_dir

  # Call autoconf but replace the "magic" variable in configure.ac if requested.

  cat $conf_script_dir/configure.ac | eval $custom_patcher | \

      ${AUTOCONF} -W all $custom_script_dir_include -I$conf_script_dir - \

      > $generated_script

  rm -rf autom4te.cache

  # Sanity check

  if test ! -s $generated_script; then

    echo "Error: Failed to generate runnable configure script" 1>&2

    rm -f $generated_script

    exit 1

  fi

}

test_generated_up_to_date() {

  conf_source_files="$conf_script_dir/configure.ac $conf_script_dir/*.m4"

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

    conf_custom_source_files="$CUSTOM_CONFIG_DIR/*.m4"

  else

    conf_custom_source_files=""

  fi

  for file in $conf_source_files $conf_custom_source_files ; do

    if test $file -nt $generated_script; then

      return 0

    fi

  done

  return 1

}

run_autoconf=false

if test "x$1" = xautogen; then

  # User called us as "configure autogen", so force regeneration

  run_autoconf=true

  shift

fi

if test ! -s $generated_script; then

  # Generated script is missing, so we need to create it

  echo "Runnable configure script is not present"

  run_autoconf=true

else

  # File is present, but is it up to date?

  if test_generated_up_to_date; then

    echo "Runnable configure script is not up to date"

    run_autoconf=true

  fi

fi

if test "x$run_autoconf" = xtrue; then

  echo "Generating runnable configure script at $generated_script"

  generate_configure_script

fi

# Autoconf calls the configure script recursively sometimes.

# Don't start logging twice in that case

if test "x$conf_debug_configure" = xtrue; then

  conf_debug_configure=recursive

fi

###

### Process command-line arguments

###

# Returns a shell-escaped version of the argument given.

function shell_quote() {

  if [[ -n "$1" ]]; then

    # Uses only shell-safe characters?  No quoting needed.

    # '=' is a zsh meta-character, but only in word-initial position.

    if echo "$1" | grep '^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\.:,%/+=_-]\{1,\}$' > /dev/null \

        && ! echo "$1" | grep '^=' > /dev/null; then

      quoted="$1"

    else

      if echo "$1" | grep "[\'!]" > /dev/null; then

        # csh does history expansion within single quotes, but not

        # when backslash-escaped!

        local quoted_quote="'\\''" quoted_exclam="'\\!'"

        word="${1//\'/${quoted_quote}}"

        word="${1//\!/${quoted_exclam}}"

      fi

      quoted="'$1'"

    fi

    echo "$quoted"

  fi

}

conf_processed_arguments=()

conf_quoted_arguments=()

conf_openjdk_target=

for conf_option

do

  # Process (and remove) our own extensions that will not be passed to autoconf

  case $conf_option in

    --openjdk-target=*)

      conf_openjdk_target=`expr "X$conf_option" : '[^=]*=\(.*\)'`

      ;;

    --debug-configure)

      if test "x$conf_debug_configure" != xrecursive; then

        conf_debug_configure=true

        export conf_debug_configure

      fi

      ;;

    *)

      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option")

      ;;

  esac

  # Store all variables overridden on the command line

  case $conf_option in

    [^-]*=*)

      # Add name of variable to CONFIGURE_OVERRIDDEN_VARIABLES list inside !...!.

      conf_env_var=`expr "x$conf_option" : 'x\([^=]*\)='`

      CONFIGURE_OVERRIDDEN_VARIABLES="$CONFIGURE_OVERRIDDEN_VARIABLES!$conf_env_var!"

      ;;

  esac

  # Save the arguments, intelligently quoted for CONFIGURE_COMMAND_LINE.

  case $conf_option in

    *=*)

      conf_option_name=`expr "x$conf_option" : 'x\([^=]*\)='`

      conf_option_name=$(shell_quote "$conf_option_name")

      conf_option_value=`expr "x$conf_option" : 'x[^=]*=\(.*\)'`

      conf_option_value=$(shell_quote "$conf_option_value")

      conf_quoted_arguments=("${conf_quoted_arguments[@]}" "$conf_option_name=$conf_option_value")

      ;;

    *)

      conf_quoted_arguments=("${conf_quoted_arguments[@]}" "$(shell_quote "$conf_option")")

      ;;

  esac

  # Check for certain autoconf options that require extra action

  case $conf_option in

    -build | --build | --buil | --bui | --bu |-build=* | --build=* | --buil=* | --bui=* | --bu=*)

      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;

    -target | --target | --targe | --targ | --tar | --ta | --t | -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)

      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;

    -host | --host | --hos | --ho | -host=* | --host=* | --hos=* | --ho=*)

      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;

    -help | --help | --hel | --he | -h)

      conf_print_help=true ;;

  esac

done

# Save the quoted command line

CONFIGURE_COMMAND_LINE="${conf_quoted_arguments[@]}"

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

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

    echo "Error: Specifying --openjdk-target together with autoconf"

    echo "legacy cross-compilation flags is not supported."

    echo "You specified: --openjdk-target=$conf_openjdk_target and $conf_legacy_crosscompile."

    echo "The recommended use is just --openjdk-target."

    exit 1

  else

    echo "Warning: You are using legacy autoconf cross-compilation flags."

    echo "It is recommended that you use --openjdk-target instead."

    echo ""

  fi

fi

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

  conf_build_platform=`sh $conf_script_dir/build-aux/config.guess`

  conf_processed_arguments=("--build=$conf_build_platform" "--host=$conf_openjdk_target" "--target=$conf_openjdk_target" "${conf_processed_arguments[@]}")

fi

# Make configure exit with error on invalid options as default.

# Can be overridden by --disable-option-checking, since we prepend our argument

# and later options override earlier.

conf_processed_arguments=("--enable-option-checking=fatal" "${conf_processed_arguments[@]}")

###

### Call the configure script

###

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

  # Turn on shell debug output if requested (initial or recursive)

  set -x

fi

# Now transfer control to the script generated by autoconf. This is where the

# main work is done.

RCDIR=`mktemp -dt jdk-build-configure.tmp.XXXXXX` || exit $?

trap "rm -rf \"$RCDIR\"" EXIT

conf_logfile=./configure.log

(exec 3>&1 ; ((. $generated_script "${conf_processed_arguments[@]}" 2>&1 1>&3 ) \

    ; echo $? > "$RCDIR/rc" ) \

    | tee -a $conf_logfile 1>&2 ; exec 3>&-) | tee -a $conf_logfile

conf_result_code=`cat "$RCDIR/rc"`

###

### Post-processing

###

if test $conf_result_code -eq 0; then

  if test "x$conf_print_help" = xtrue; then

    cat <<EOT

Additional (non-autoconf) OpenJDK Options:

  --openjdk-target=TARGET cross-compile with TARGET as target platform

                          (i.e. the one you will run the resulting binary on).

                          Equivalent to --host=TARGET --target=TARGET

                          --build=<current platform>

  --debug-configure       Run the configure script with additional debug

                          logging enabled.

EOT

    # Print additional help, e.g. a list of toolchains and JVM features.

    # This must be done by the autoconf script.

    ( CONFIGURE_PRINT_ADDITIONAL_HELP=true . $generated_script PRINTF=printf )

    cat <<EOT

Please be aware that, when cross-compiling, the OpenJDK configure script will

generally use 'target' where autoconf traditionally uses 'host'.

Also note that variables must be passed on the command line. Variables in the

environment will generally be ignored, unlike traditional autoconf scripts.

EOT

  fi

else

  echo configure exiting with result code $conf_result_code

fi

exit $conf_result_code