#!/bin/sh
# $Id: clang++-version.in 7100 2012-10-27 18:26:38Z cher $
# Copyright (c) 2012 Alexander Chernov <cher@ejudge.ru>

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

common_config() {
  echo 'long_name="clang C++"'
  echo 'src_sfx=".cpp"'
  echo 'arch="linux-shared"'
}

failure() {
  rm -f conftest*
  echo 'version='
  echo 'arg="'"${arg}"'"'
  common_config
  echo 'CLANGRUN=false'
  echo 'CLANGDIR='
  [ "${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 ] && CLANGRUN="$2"
  [ "${CLANGRUN}" = "" ] && CLANGRUN="clang++"

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

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

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

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

if [ -f "${EJUDGE_LANG_CONFIG}" ]
then
  . "${EJUDGE_LANG_CONFIG}"
else
  CLANGRUN="clang++"
  CLANGDIR=
fi

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

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

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

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

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