#!/bin/sh
# $Id: g++-version.in 5550 2009-02-19 18:14:43Z cher $
# Copyright (c) 2005-2008 Alexander Chernov <cher@ejudge.ru>

LANG_CONFIG_DIR="/home/judges/compile/conf/lang.d"

common_config() {
  echo 'long_name="GNU C++"'
  echo 'src_sfx=".cpp"'
}

failure() {
  rm -f conftest*
  echo 'version='
  echo 'arg="'"${arg}"'"'
  common_config
  echo 'GPPRUN=false'
  echo 'GPPDIR='
  [ "${verbose}" = 1 ] && echo "no" >&2
  exit 1
}

unset LANG
unset LC_ALL
unset LC_MESSAGES
unset LANGUAGE

if [ x"$1" = x-v ]
then
  verbose=1
  shift
fi

# recheck the language
if [ x"$1" = x-r ]
then
  arg="$2"
  [ x"$2" != x ] && GPPRUN="$2"
  [ "${GPPRUN}" = "" ] && GPPRUN="g++"

  [ "${verbose}" = 1 ] && echo -n "checking whether GNU C++ is available..." >&2
  "${GPPRUN}" -v >/dev/null 2>/dev/null || failure
  version=`"${GPPRUN}" -v 2>&1 | grep "gcc version" | gawk '{ print $3; }'` || failure
  [ "${version}" != "" ] || failure
  cat > conftest.cpp <<EOF
#include <iostream>
using namespace std;
int main() { cout << "ok" << endl; return 0; }
EOF
  "${GPPRUN}" -static conftest.cpp -o conftest 2>/dev/null >/dev/null || failure
  [ -x conftest ] || failure
  ./conftest 2>/dev/null >/dev/null || failure

  rm -f ./conftest*
  GPPDIR=`dirname "${GPPRUN}"`
  [ "${GPPDIR}" = . ] && GPPDIR=""
  echo 'version="'"${version}"'"'
  echo 'arg="'"${arg}"'"'
  common_config
  echo 'GPPRUN="'"${GPPRUN}"'"'
  echo 'GPPDIR="'"${GPPDIR}"'"'
  [ "${verbose}" = 1 ] && echo "yes, ${GPPRUN}, ${version}" >&2
  exit 0
fi

if [ x"$1" = x-l ]
then
  echo "GNU C++ compiler [http://gcc.gnu.org]"
  exit 0
fi

[ "${EJUDGE_LANG_CONFIG}" = "" ] && EJUDGE_LANG_CONFIG="${LANG_CONFIG_DIR}/g++.cfg"

if [ -f "${EJUDGE_LANG_CONFIG}" ]
then
  . "${EJUDGE_LANG_CONFIG}"
else
  GPPRUN="g++"
  GPPDIR=
fi

if [ x"${GPPRUN}" = x -o x"${GPPRUN}" = xfalse ]
then
  echo "This language is not supported." >&2
  exit 1
fi

if [ x"${GPPDIR}" != x ]
then
    PATH="${GPPDIR}:${PATH}"
fi

if [ x"$1" = x-p ]
then
    echo "${GPPRUN}"
    exit 0
fi
    
"${GPPRUN}" -v 2>/dev/null >/dev/null || exit 1

[ x"$1" = x-f ] && echo -n "GNU C++ "

"${GPPRUN}" -v 2>&1 | grep "gcc version" | gawk '{ print $3; }'