#! /usr/bin/env bash

# file      : build/cxx/gnu/configure
# copyright : Copyright (c) 2004-2012 Code Synthesis Tools CC
# license   : GNU GPL v2; see accompanying LICENSE file

# $1  out file
# $2  optimize (y/n)
# $3  cxx_extra_options
# $4  cxx_ld_extra_options
#
# bld_root     - build root
# project_name - project name
#


source $bld_root/dialog.bash

$echo
$echo
$echo "configuring '$project_name'"
$echo
$echo

$echo
$echo "Please enter the g++ binary you would like to use, for example 'g++-3.4',"
$echo "'/usr/local/bin/g++' or 'distcc g++'."
$echo

cxx_gnu=`read_path --command g++`

# Determine the C++ standard.
#
cxx_gnu_standard=`echo "$3" | sed -e 's/.*-std=\([^ ]*\).*/\1/' -e t -e d`

if [ -z "$cxx_gnu_standard" ]; then
  cxx_gnu_standard="gnu++98"
elif [ "$cxx_gnu_standard" = "c++0x" ]; then
  cxx_gnu_standard="c++11"
elif [ "$cxx_gnu_standard" = "gnu++0x" ]; then
  cxx_gnu_standard="gnu++11"
fi

# Pass cxx_extra_options and cxx_ld_extra_options since those
# can affect the search paths (e.g., -m32) and target.
#
cxx_gnu_libraries=`$cxx_gnu $3 $4 -print-search-dirs | sed -e 's/libraries: =//p' -e d`

cxx_gnu_target=`$cxx_gnu $3 $4 -dumpmachine`
cxx_gnu_target=`$bld_root/system/config.sub "$cxx_gnu_target"`

if [ $? != 0 ]; then
  $echo "unable to canonicalize target system '$cxx_gnu_target'"
  exit 1
fi

cxx_gnu_target_cpu=`echo $cxx_gnu_target | cut -f 1 -d -`
cxx_gnu_target_mf=`echo $cxx_gnu_target | cut -f 2 -d -`
cxx_gnu_target_kernel=`echo $cxx_gnu_target | cut -f 3 -d -`
cxx_gnu_target_os=`echo $cxx_gnu_target | cut -f 4 -d -`

if [ -z "$cxx_gnu_target_os" ]; then

  # Old format: cpu-mf-os
  #
  cxx_gnu_target_os=$cxx_gnu_target_kernel
  cxx_gnu_target_kernel=
fi

optimization=

if [ "$2" == "y" ]; then

  $echo
  $echo "Please select the optimization level you would like to use:"
  $echo
  $echo "(1) -O1 [Tries to reduce code size and execution time, without"
  $echo "         performing any optimizations that take a great deal of"
  $echo "         compilation time.]"
  $echo "(2) -O2 [Performs nearly all supported optimizations that do not"
  $echo "         involve a space-speed tradeoff.]"
  $echo "(3) -O3 [Optimize even more.]"
  $echo "(4) -Os [Optimize for size.]"
  $echo

  optimization=`read_option "-O1 -O2 -O3 -Os" "-O2"`

fi

echo "cxx_gnu := $cxx_gnu"                              > $1
echo "cxx_gnu_standard := $cxx_gnu_standard"           >> $1
echo "cxx_gnu_libraries := $cxx_gnu_libraries"         >> $1
echo "cxx_gnu_optimization_options := $optimization"   >> $1
echo "cxx_gnu_target := $cxx_gnu_target"               >> $1
echo "cxx_gnu_target_cpu := $cxx_gnu_target_cpu"       >> $1
echo "cxx_gnu_target_mf := $cxx_gnu_target_mf"         >> $1
echo "cxx_gnu_target_kernel := $cxx_gnu_target_kernel" >> $1
echo "cxx_gnu_target_os := $cxx_gnu_target_os"         >> $1