message: PWGCF: AliFemtoConfigObject - empty regular expressions if gcc is less than 4.9
diff: @@ -461,6 +461,26 @@ AliFemtoConfigObject::Parse(const std::string &src)
  #define COMMA_PAT "\\s*" "," "\\s*"
  #define COLON_PAT "\\s*" ":" "\\s*"
  +#if !defined(__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ < 9
  +static const std::regex
  + NUM_RX(""),
  + INT_RX(""),
  + FLT_RX(""),
  + STR_RX(""),
  + ID_RX(""),
  + KEY_RX(""),
  + RANGE_RX(""),
  + RANGELIST_RX(""),
  + LBRK_RX(""),
  + RBRK_RX(""),
  + LSQRBRK_RX(""),
  + RSQRBRK_RX(""),
  + LPAREN_RX(""),
  + RPAREN_RX(""),
  + COLON_RX(""),
  + COMMA_RX("");
  +
  +#else
  static const std::regex
  NUM_RX("^" NUM_PATTERN),
  INT_RX("^" INT_PATTERN),
  @@ -478,7 +498,7 @@ static const std::regex
  RPAREN_RX("^" RPRN_PAT),
  COLON_RX("^" COLON_PAT),
  COMMA_RX("^" COMMA_PAT);
  -
  +#endif
  