[Quantlib-users] Failed to run Quantlib example

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Hi,

I have followed the instructions as provided in
https://www.quantlib.org/install/macosx.shtml to install QL in iMac. All
worked file, however when I tried to run the example as,

g++ -I/usr/local/include/ -I/usr/local/include/boost BermudanSwaption.cpp \
    -o bermudanswaption -L/usr/local/lib/ -lQuantLib

I get below error

*In file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:28:In file included from
/usr/local/include/ql/patterns/lazyobject.hpp:27:In file included from
/usr/local/include/ql/patterns/observable.hpp:32:/usr/local/include/ql/errors.hpp:49:21:
error: exception specification of overriding function is more lax than base
version        const char* what() const noexcept override;

^/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/exception:106:25:
note: overridden virtual function is here    virtual const char* what()
const _NOEXCEPT;                        ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:28:In file included from
/usr/local/include/ql/patterns/lazyobject.hpp:27:In file included from
/usr/local/include/ql/patterns/observable.hpp:32:/usr/local/include/ql/errors.hpp:49:33:
error: expected ';' at end of declaration list        const char* what()
const noexcept override;                                ^
              ;/usr/local/include/ql/errors.hpp:39:11: error: exception
specification of overriding function is more lax than base version    class
Error : public std::exception {
^/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/exception:105:13:
note: overridden virtual function is here    virtual ~exception()
_NOEXCEPT;            ^In file included from BermudanSwaption.cpp:26:In
file included from /usr/local/include/ql/instruments/swaption.hpp:32:In
file included from /usr/local/include/ql/option.hpp:27:In file included
from /usr/local/include/ql/instrument.hpp:28:In file included from
/usr/local/include/ql/patterns/lazyobject.hpp:27:In file included from
/usr/local/include/ql/patterns/observable.hpp:33:/usr/local/include/ql/patterns/singleton.hpp:98:39:
warning: deleted function definitions are a C++11 extension
[-Wc++11-extensions]        Singleton(const Singleton&) = delete;

^/usr/local/include/ql/patterns/singleton.hpp:99:28: warning: rvalue
references are a C++11 extension [-Wc++11-extensions]
Singleton(Singleton&&) = delete;
 ^/usr/local/include/ql/patterns/singleton.hpp:99:34: warning: deleted
function definitions are a C++11 extension [-Wc++11-extensions]
Singleton(Singleton&&) = delete;
 ^/usr/local/include/ql/patterns/singleton.hpp:100:50: warning: deleted
function definitions are a C++11 extension [-Wc++11-extensions]
Singleton& operator=(const Singleton&) = delete;
                     ^/usr/local/include/ql/patterns/singleton.hpp:101:39:
warning: rvalue references are a C++11 extension [-Wc++11-extensions]
  Singleton& operator=(Singleton&&) = delete;
        ^/usr/local/include/ql/patterns/singleton.hpp:101:45: warning:
deleted function definitions are a C++11 extension [-Wc++11-extensions]
    Singleton& operator=(Singleton&&) = delete;
                ^/usr/local/include/ql/patterns/singleton.hpp:115:23:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Singleton() = default;                      ^In
file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:28:In file included from
/usr/local/include/ql/patterns/lazyobject.hpp:27:/usr/local/include/ql/patterns/observable.hpp:57:33:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        virtual ~Observable() = default;
                ^/usr/local/include/ql/patterns/observable.hpp:86:32:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        ObservableSettings() = default;
               ^/usr/local/include/ql/patterns/observable.hpp:96:30:
warning: default member initializer for non-static data member is a C++11
extension [-Wc++11-extensions]        bool updatesEnabled_ = true,
updatesDeferred_ = false;
 ^/usr/local/include/ql/patterns/observable.hpp:96:55: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        bool updatesEnabled_ = true, updatesDeferred_ =
false;
^/usr/local/include/ql/patterns/observable.hpp:116:22: warning: defaulted
function definitions are a C++11 extension [-Wc++11-extensions]
Observer() = default;
 ^/usr/local/include/ql/patterns/observable.hpp:203:20: warning: 'auto'
type specifier is a C++11 extension [-Wc++11-extensions]        for (const
auto& observable : observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:203:37: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
^/usr/local/include/ql/patterns/observable.hpp:208:20: warning: 'auto' type
specifier is a C++11 extension [-Wc++11-extensions]        for (const auto&
observable : observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:208:37: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
^/usr/local/include/ql/patterns/observable.hpp:211:20: warning: 'auto' type
specifier is a C++11 extension [-Wc++11-extensions]        for (const auto&
observable : observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:211:37: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
^/usr/local/include/ql/patterns/observable.hpp:217:20: warning: 'auto' type
specifier is a C++11 extension [-Wc++11-extensions]        for (const auto&
observable : observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:217:37: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
^/usr/local/include/ql/patterns/observable.hpp:233:24: warning: 'auto' type
specifier is a C++11 extension [-Wc++11-extensions]            for (const
auto& observable : o->observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:233:41: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]
for (const auto& observable : o->observables_)
          ^/usr/local/include/ql/patterns/observable.hpp:246:20: warning:
'auto' type specifier is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
 ^/usr/local/include/ql/patterns/observable.hpp:246:37: warning:
range-based for loop is a C++11 extension [-Wc++11-extensions]        for
(const auto& observable : observables_)
^In file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:28:/usr/local/include/ql/patterns/lazyobject.hpp:36:24:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        LazyObject() = default;
 ^/usr/local/include/ql/patterns/lazyobject.hpp:37:23: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        ~LazyObject()
override = default;
^/usr/local/include/ql/patterns/lazyobject.hpp:37:34: warning: defaulted
function definitions are a C++11 extension [-Wc++11-extensions]
~LazyObject() override = default;
 ^/usr/local/include/ql/patterns/lazyobject.hpp:40:23: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void update()
override;
^/usr/local/include/ql/patterns/lazyobject.hpp:109:34: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        mutable bool calculated_ = false, frozen_ =
false, alwaysForward_ = false;
 ^/usr/local/include/ql/patterns/lazyobject.hpp:109:51: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        mutable bool calculated_ = false, frozen_ =
false, alwaysForward_ = false;
    ^/usr/local/include/ql/patterns/lazyobject.hpp:109:75: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        mutable bool calculated_ = false, frozen_ =
false, alwaysForward_ = false;
                            ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:29:/usr/local/include/ql/pricingengine.hpp:38:26:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  ~PricingEngine() override = default;
 ^/usr/local/include/ql/pricingengine.hpp:38:37: warning: defaulted
function definitions are a C++11 extension [-Wc++11-extensions]
~PricingEngine() override = default;
^/usr/local/include/ql/pricingengine.hpp:47:32: warning: defaulted function
definitions are a C++11 extension [-Wc++11-extensions]        virtual
~arguments() = default;
 ^/usr/local/include/ql/pricingengine.hpp:53:30: warning: defaulted
function definitions are a C++11 extension [-Wc++11-extensions]
virtual ~results() = default;
 ^/usr/local/include/ql/pricingengine.hpp:66:56: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]
PricingEngine::arguments* getArguments() const override { return
&arguments_; }
 ^/usr/local/include/ql/pricingengine.hpp:67:58: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        const
PricingEngine::results* getResults() const override { return &results_; }

 ^/usr/local/include/ql/pricingengine.hpp:68:22: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void reset()
override { results_.reset(); }
 ^/usr/local/include/ql/pricingengine.hpp:69:23: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void update()
override { notifyObservers(); }                      ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:30:/usr/local/include/ql/utilities/null.hpp:43:13:
error: unknown type name 'constexpr'            constexpr static float
nullValue() {            ^/usr/local/include/ql/utilities/null.hpp:52:13:
error: unknown type name 'constexpr'            constexpr static int
nullValue() {            ^/usr/local/include/ql/utilities/null.hpp:78:18:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Null() = default;                 ^In file
included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:31:In file included from
/usr/local/include/ql/time/date.hpp:34:/usr/local/include/ql/time/period.hpp:46:20:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Period() = default;
 ^/usr/local/include/ql/time/period.hpp:60:25: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        Integer length_ = 0;
^/usr/local/include/ql/time/period.hpp:61:25: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        TimeUnit units_ = Days;
^/usr/local/include/ql/time/period.hpp:148:16: warning: generalized
initializer lists are a C++11 extension [-Wc++11-extensions]        return
{Integer(n), units};
 ^~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:148:16: error:
non-aggregate type 'QuantLib::Period' cannot be initialized with an
initializer list        return {Integer(n), units};
 ^~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:153:16: warning:
generalized initializer lists are a C++11 extension [-Wc++11-extensions]
    return {Integer(n), units};
 ^~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:153:16: error:
non-aggregate type 'QuantLib::Period' cannot be initialized with an
initializer list        return {Integer(n), units};
 ^~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:156:55: warning:
generalized initializer lists are a C++11 extension [-Wc++11-extensions]
inline Period operator-(const Period& p) { return {-p.length(), p.units()};
}
^~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:156:55:
error: non-aggregate type 'QuantLib::Period' cannot be initialized with an
initializer list    inline Period operator-(const Period& p) { return
{-p.length(), p.units()}; }
      ^~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:158:66:
warning: generalized initializer lists are a C++11 extension
[-Wc++11-extensions]    inline Period operator*(Integer n, const Period& p)
{ return {n * p.length(), p.units()}; }

 ^~~~~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:158:66:
error: non-aggregate type 'QuantLib::Period' cannot be initialized with an
initializer list    inline Period operator*(Integer n, const Period& p) {
return {n * p.length(), p.units()}; }

 ^~~~~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:160:66:
warning: generalized initializer lists are a C++11 extension
[-Wc++11-extensions]    inline Period operator*(const Period& p, Integer n)
{ return {n * p.length(), p.units()}; }

 ^~~~~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/period.hpp:160:66:
error: non-aggregate type 'QuantLib::Period' cannot be initialized with an
initializer list    inline Period operator*(const Period& p, Integer n) {
return {n * p.length(), p.units()}; }
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:In file included from
/usr/local/include/ql/instrument.hpp:31:/usr/local/include/ql/time/date.hpp:386:18:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Null() = default;
 ^/usr/local/include/ql/time/date.hpp:387:40: warning: generalized
initializer lists are a C++11 extension [-Wc++11-extensions]
operator Date() const { return {}; }
 ^~/usr/local/include/ql/time/date.hpp:387:40: error: non-aggregate type
'QuantLib::Date' cannot be initialized with an initializer list
operator Date() const { return {}; }
 ^~/usr/local/include/ql/time/date.hpp:431:16: warning: generalized
initializer lists are a C++11 extension [-Wc++11-extensions]        return
{monthLength(m, isLeap(y)), m, y};
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~/usr/local/include/ql/time/date.hpp:431:16:
error: non-aggregate type 'QuantLib::Date' cannot be initialized with an
initializer list        return {monthLength(m, isLeap(y)), m, y};
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:/usr/local/include/ql/instrument.hpp:88:32:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void calculate() const override;
 ^/usr/local/include/ql/instrument.hpp:99:42: warning: 'override' keyword
is a C++11 extension [-Wc++11-extensions]        void performCalculations()
const override;
 ^/usr/local/include/ql/instrument.hpp:115:22: warning: 'override' keyword
is a C++11 extension [-Wc++11-extensions]        void reset() override {
                 ^/usr/local/include/ql/instrument.hpp:113:23: error:
exception specification of overriding function is more lax than base
version    class Instrument::results : public virtual
PricingEngine::results {
^/usr/local/include/ql/pricingengine.hpp:53:17: note: overridden virtual
function is here        virtual ~results() = default;                ^In
file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:In file included from
/usr/local/include/ql/option.hpp:27:/usr/local/include/ql/instrument.hpp:174:15:
warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
    const auto* results = dynamic_cast<const Instrument::results*>(r);
        ^In file included from BermudanSwaption.cpp:26:In file included
from
/usr/local/include/ql/instruments/swaption.hpp:32:/usr/local/include/ql/option.hpp:44:62:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void setupArguments(PricingEngine::arguments*) const override;

 ^/usr/local/include/ql/option.hpp:59:23: warning: defaulted function
definitions are a C++11 extension [-Wc++11-extensions]        arguments() =
default;                      ^/usr/local/include/ql/option.hpp:60:31:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void validate() const override {
^/usr/local/include/ql/option.hpp:57:19: error: exception specification of
overriding function is more lax than base version    class
Option::arguments : public virtual PricingEngine::arguments {
    ^/usr/local/include/ql/pricingengine.hpp:47:17: note: overridden
virtual function is here        virtual ~arguments() = default;
    ^In file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:32:/usr/local/include/ql/option.hpp:71:22:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void reset() override { delta = gamma = theta = vega = rho = dividendRho
= Null<Real>(); }
 ^/usr/local/include/ql/option.hpp:81:22: warning: 'override' keyword is a
C++11 extension [-Wc++11-extensions]        void reset() override {
             ^/usr/local/include/ql/option.hpp:93:9: warning: 'auto' type
specifier is a C++11 extension [-Wc++11-extensions]        auto* arguments
= dynamic_cast<Option::arguments*>(args);        ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:29:In file included from
/usr/local/include/ql/instruments/swap.hpp:30:In file included from
/usr/local/include/ql/cashflow.hpp:28:/usr/local/include/ql/event.hpp:42:18:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  ~Event() override = default;
 ^/usr/local/include/ql/event.hpp:42:29: warning: defaulted function
definitions are a C++11 extension [-Wc++11-extensions]        ~Event()
override = default;
^/usr/local/include/ql/event.hpp:72:31: warning: 'override' keyword is a
C++11 extension [-Wc++11-extensions]            Date date() const override
{ return date_; }                              ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:29:In file included from
/usr/local/include/ql/instruments/swap.hpp:30:In file included from
/usr/local/include/ql/cashflow.hpp:29:/usr/local/include/ql/math/comparison.hpp:69:9:
error: unknown type name 'constexpr'        constexpr double tolerance = 42
* QL_EPSILON;        ^/usr/local/include/ql/math/comparison.hpp:100:9:
error: unknown type name 'constexpr'        constexpr double tolerance = 42
* QL_EPSILON;        ^In file included from BermudanSwaption.cpp:26:In file
included from /usr/local/include/ql/instruments/swaption.hpp:33:In file
included from /usr/local/include/ql/instruments/vanillaswap.hpp:29:In file
included from
/usr/local/include/ql/instruments/swap.hpp:30:/usr/local/include/ql/cashflow.hpp:40:21:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  ~CashFlow() override = default;
^/usr/local/include/ql/cashflow.hpp:40:32: warning: defaulted function
definitions are a C++11 extension [-Wc++11-extensions]        ~CashFlow()
override = default;
 ^/usr/local/include/ql/cashflow.hpp:44:27: warning: 'override' keyword is
a C++11 extension [-Wc++11-extensions]        Date date() const override =
0;                          ^/usr/local/include/ql/cashflow.hpp:50:84:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
                   boost::optional<bool> includeRefDate = boost::none)
const override;
                       ^/usr/local/include/ql/cashflow.hpp:67:38: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]        void
accept(AcyclicVisitor&) override;
 ^/usr/local/include/ql/cashflow.hpp:60:52: warning: generalized
initializer lists are a C++11 extension [-Wc++11-extensions]        virtual
Date exCouponDate() const { return {}; };
                 ^~/usr/local/include/ql/cashflow.hpp:60:52: error:
non-aggregate type 'QuantLib::Date' cannot be initialized with an
initializer list        virtual Date exCouponDate() const { return {}; };
                                                 ^~In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:29:/usr/local/include/ql/instruments/swap.hpp:68:27:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void deepUpdate() override;
^/usr/local/include/ql/instruments/swap.hpp:72:32: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        bool isExpired()
const override;
 ^/usr/local/include/ql/instruments/swap.hpp:73:62: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void
setupArguments(PricingEngine::arguments*) const override;

 ^/usr/local/include/ql/instruments/swap.hpp:74:64: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void
fetchResults(const PricingEngine::results*) const override;

 ^/usr/local/include/ql/instruments/swap.hpp:129:35: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void
setupExpired() const override;
^/usr/local/include/ql/instruments/swap.hpp:145:31: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void validate()
const override;
^/usr/local/include/ql/instruments/swap.hpp:141:17: error: exception
specification of overriding function is more lax than base version    class
Swap::arguments : public virtual PricingEngine::arguments {
^/usr/local/include/ql/pricingengine.hpp:47:17: note: overridden virtual
function is here        virtual ~arguments() = default;                ^In
file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:29:/usr/local/include/ql/instruments/swap.hpp:154:22:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void reset() override;                     ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:30:/usr/local/include/ql/time/daycounter.hpp:49:31:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]            virtual ~Impl() = default;
            ^/usr/local/include/ql/time/daycounter.hpp:72:24: warning:
defaulted function definitions are a C++11 extension [-Wc++11-extensions]
      DayCounter() = default;                       ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:31:In file included from
/usr/local/include/ql/time/schedule.hpp:29:In file included from
/usr/local/include/ql/time/calendars/nullcalendar.hpp:28:/usr/local/include/ql/time/calendar.hpp:66:31:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]            virtual ~Impl() = default;
            ^/usr/local/include/ql/time/calendar.hpp:78:22: warning:
defaulted function definitions are a C++11 extension [-Wc++11-extensions]
      Calendar() = default;
 ^/usr/local/include/ql/time/calendar.hpp:170:43: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]            bool
isWeekend(Weekday) const override;
^/usr/local/include/ql/time/calendar.hpp:181:43: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]            bool
isWeekend(Weekday) const override;
^In file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:31:In file included from
/usr/local/include/ql/time/schedule.hpp:29:/usr/local/include/ql/time/calendars/nullcalendar.hpp:42:38:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
      std::string name() const override { return "Null"; }

 ^/usr/local/include/ql/time/calendars/nullcalendar.hpp:43:43: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
bool isWeekend(Weekday) const override { return false; }

^/usr/local/include/ql/time/calendars/nullcalendar.hpp:44:51: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
bool isBusinessDay(const Date&) const override { return true; }
                                      ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:In file included from
/usr/local/include/ql/instruments/vanillaswap.hpp:31:/usr/local/include/ql/time/schedule.hpp:66:22:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Schedule() = default;
 ^/usr/local/include/ql/time/schedule.hpp:148:36: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        DateGeneration::Rule rule_ =
DateGeneration::Backward;
 ^/usr/local/include/ql/time/schedule.hpp:149:26: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        bool endOfMonth_ = false;
   ^In file included from BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:33:/usr/local/include/ql/instruments/vanillaswap.hpp:112:67:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void setupArguments(PricingEngine::arguments* args) const override;

^/usr/local/include/ql/instruments/vanillaswap.hpp:113:64: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]        void
fetchResults(const PricingEngine::results*) const override;

 ^/usr/local/include/ql/instruments/vanillaswap.hpp:116:35: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]        void
setupExpired() const override;
^/usr/local/include/ql/instruments/vanillaswap.hpp:137:19: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        Type type = Receiver;
^/usr/local/include/ql/instruments/vanillaswap.hpp:150:31: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]        void
validate() const override;
^/usr/local/include/ql/instruments/vanillaswap.hpp:158:22: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]        void
reset() override;                     ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:34:In file included from
/usr/local/include/ql/termstructures/yieldtermstructure.hpp:29:In file
included from
/usr/local/include/ql/termstructure.hpp:29:/usr/local/include/ql/settings.hpp:113:42:
warning: default member initializer for non-static data member is a C++11
extension [-Wc++11-extensions]        bool includeReferenceDateEvents_ =
false;
 ^/usr/local/include/ql/settings.hpp:115:45: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        bool enforcesTodaysHistoricFixings_ = false;
                                        ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:34:In file included from
/usr/local/include/ql/termstructures/yieldtermstructure.hpp:29:In file
included from
/usr/local/include/ql/termstructure.hpp:30:/usr/local/include/ql/handle.hpp:51:27:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
      void update() override { notifyObservers(); }
  ^/usr/local/include/ql/handle.hpp:55:30: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]            bool isObserver_ = false;
           ^In file included from BermudanSwaption.cpp:26:In file included
from /usr/local/include/ql/instruments/swaption.hpp:34:In file included
from /usr/local/include/ql/termstructures/yieldtermstructure.hpp:29:In file
included from
/usr/local/include/ql/termstructure.hpp:31:/usr/local/include/ql/math/interpolations/extrapolation.hpp:34:26:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        Extrapolator() = default;
   ^/usr/local/include/ql/math/interpolations/extrapolation.hpp:35:35:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        virtual ~Extrapolator() = default;

^/usr/local/include/ql/math/interpolations/extrapolation.hpp:49:27:
warning: default member initializer for non-static data member is a C++11
extension [-Wc++11-extensions]        bool extrapolate_ = false;
              ^In file included from BermudanSwaption.cpp:26:In file
included from /usr/local/include/ql/instruments/swaption.hpp:34:In file
included from
/usr/local/include/ql/termstructures/yieldtermstructure.hpp:29:/usr/local/include/ql/termstructure.hpp:75:26:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  ~TermStructure() override = default;
 ^/usr/local/include/ql/termstructure.hpp:75:9: error: exception
specification of overriding function is more lax than base version
~TermStructure() override = default;
^/usr/local/include/ql/math/interpolations/extrapolation.hpp:35:17: note:
overridden virtual function is here        virtual ~Extrapolator() =
default;                ^In file included from BermudanSwaption.cpp:26:In
file included from /usr/local/include/ql/instruments/swaption.hpp:34:In
file included from
/usr/local/include/ql/termstructures/yieldtermstructure.hpp:29:/usr/local/include/ql/termstructure.hpp:75:37:
warning: defaulted function definitions are a C++11 extension
[-Wc++11-extensions]        ~TermStructure() override = default;
                        ^/usr/local/include/ql/termstructure.hpp:95:23:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void update() override;
^/usr/local/include/ql/termstructure.hpp:104:22: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        bool moving_ = false;
 ^/usr/local/include/ql/termstructure.hpp:105:31: warning: default member
initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        mutable bool updated_ = true;
            ^In file included from BermudanSwaption.cpp:26:In file included
from /usr/local/include/ql/instruments/swaption.hpp:34:In file included
from /usr/local/include/ql/termstructures/yieldtermstructure.hpp:30:In file
included from
/usr/local/include/ql/interestrate.hpp:28:/usr/local/include/ql/time/daycounters/actual365fixed.hpp:54:38:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
      std::string name() const override { return std::string("Actual/365
(Fixed)"); }
 ^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:56:90: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
yearFraction(const Date& d1, const Date& d2, const Date&, const Date&)
const override {

 ^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:62:38: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
std::string name() const override {
 ^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:68:63: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
              const Date& refPeriodEnd) const override;

^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:72:38: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
std::string name() const override { return std::string("Actual/365 (No
Leap)"); }
 ^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:73:78: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
Date::serial_type dayCount(const Date& d1, const Date& d2) const override;

 ^/usr/local/include/ql/time/daycounters/actual365fixed.hpp:77:63: warning:
'override' keyword is a C++11 extension [-Wc++11-extensions]
              const Date& refPeriodEnd) const override;
                                          ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:34:In file included from
/usr/local/include/ql/termstructures/yieldtermstructure.hpp:31:/usr/local/include/ql/quote.hpp:39:18:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  ~Quote() override = default;
 ^/usr/local/include/ql/quote.hpp:39:29: warning: defaulted function
definitions are a C++11 extension [-Wc++11-extensions]        ~Quote()
override = default;                            ^In file included from
BermudanSwaption.cpp:26:In file included from
/usr/local/include/ql/instruments/swaption.hpp:34:/usr/local/include/ql/termstructures/yieldtermstructure.hpp:155:23:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void update() override;
^/usr/local/include/ql/termstructures/yieldtermstructure.hpp:176:22:
warning: default member initializer for non-static data member is a C++11
extension [-Wc++11-extensions]        Size nJumps_ = 0;
 ^In file included from
BermudanSwaption.cpp:26:/usr/local/include/ql/instruments/swaption.hpp:91:32:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  bool isExpired() const override;
 ^/usr/local/include/ql/instruments/swaption.hpp:92:62: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void
setupArguments(PricingEngine::arguments*) const override;

 ^/usr/local/include/ql/instruments/swaption.hpp:128:23: warning: defaulted
function definitions are a C++11 extension [-Wc++11-extensions]
arguments() = default;
^/usr/local/include/ql/instruments/swaption.hpp:130:41: warning: default
member initializer for non-static data member is a C++11 extension
[-Wc++11-extensions]        Settlement::Type settlementType =
Settlement::Physical;
^/usr/local/include/ql/instruments/swaption.hpp:132:31: warning: 'override'
keyword is a C++11 extension [-Wc++11-extensions]        void validate()
const override;                              ^In file included from
BermudanSwaption.cpp:27:/usr/local/include/ql/pricingengines/swap/discountingswapengine.hpp:41:32:
warning: 'override' keyword is a C++11 extension [-Wc++11-extensions]
  void calculate() const override;                               ^In file
included from BermudanSwaption.cpp:28:In file included from
/usr/local/include/ql/pricingengines/swaption/treeswaptionengine.hpp:29:In
file included from
/usr/local/include/ql/pricingengines/latticeshortratemodelengine.hpp:28:In
file included from /usr/local/include/ql/models/model.hpp:30:In file
included from /usr/local/include/ql/methods/lattices/lattice.hpp:28:In file
included from
/usr/local/include/ql/numericalmethod.hpp:28:/usr/local/include/ql/math/array.hpp:67:20:
warning: rvalue references are a C++11 extension [-Wc++11-extensions]
  Array(Array&&) noexcept;                   ^fatal error: too many errors
emitted, stopping now [-ferror-limit=]125 warnings and 20 errors generated.*

Could you please suggest how to resolve this error?