An application compiled for Windows and Android without warnings and errors (on windows environment). When compile for iOS appears these errors:

In file included from ../../Qt/5.7/ios/include/QtCore/qstring.h:48:
../../Qt/5.7/ios/include/QtCore/qchar.h:45:1: error: unknown type name 'QT_BEGIN_NAMESPACE'
QT_BEGIN_NAMESPACE
^
../../Qt/5.7/ios/include/QtCore/qchar.h:48:1: error: expected unqualified-id
class QString;
^
../../Qt/5.7/ios/include/QtCore/qchar.h:55:29: error: unknown type name 'ushort'; did you mean 'short'?
Q_DECL_CONSTEXPR inline ushort unicode() const Q_DECL_NOTHROW

{ return ushort(uchar(ch)); }
^
../../Qt/5.7/ios/include/QtCore/qchar.h:55:83: error: use of undeclared identifier 'uchar'; did you mean 'char'?
Q_DECL_CONSTEXPR inline ushort unicode() const Q_DECL_NOTHROW { return ushort(uchar(ch)); }

^
../../Qt/5.7/ios/include/QtCore/qchar.h:55:36: error: no return statement in constexpr function
Q_DECL_CONSTEXPR inline ushort unicode() const Q_DECL_NOTHROW

{ return ushort(uchar(ch)); }

^
../../Qt/5.7/ios/include/QtCore/qchar.h:63:1: error: expected expression
public:
^
../../Qt/5.7/ios/include/QtCore/qchar.h:333:24: error: token is not a valid binary operator in a preprocessor subexpression
#if QT_DEPRECATED_SINCE(5, 3)
~~~~~~~~~~~~~~~~~~~^
../../Qt/5.7/ios/include/QtCore/qchar.h:390:24: error: token is not a valid binary operator in a preprocessor subexpression
#if QT_DEPRECATED_SINCE(5, 3)
~~~~~~~~~~~~~~~~~~~^
../../Qt/5.7/ios/include/QtCore/qchar.h:422:24: error: token is not a valid binary operator in a preprocessor subexpression
#if QT_DEPRECATED_SINCE(5, 0)
~~~~~~~~~~~~~~~~~~~^
../../Qt/5.7/ios/include/QtCore/qchar.h:429:24: error: token is not a valid binary operator in a preprocessor subexpression
#if QT_DEPRECATED_SINCE(5, 0)
~~~~~~~~~~~~~~~~~~~^
../../Qt/5.7/ios/include/QtCore/qchar.h:500:24: error: token is not a valid binary operator in a preprocessor subexpression
#if QT_DEPRECATED_SINCE(5, 3)
~~~~~~~~~~~~~~~~~~~^
../../Qt/5.7/ios/include/QtCore/qchar.h:62:21: error: variable has incomplete type 'class Q_CORE_EXPORT'
class Q_CORE_EXPORT QChar {
^
../../Qt/5.7/ios/include/QtCore/qchar.h:62:7: note: forward declaration of 'Q_CORE_EXPORT'
class Q_CORE_EXPORT QChar {
^
../../Qt/5.7/ios/include/QtCore/qchar.h:571:1: error: C++ requires a type specifier for all declarations
Q_DECLARE_TYPEINFO(QChar, Q_MOVABLE_TYPE);
^
../../Qt/5.7/ios/include/QtCore/qchar.h:571:27: error: use of undeclared identifier 'Q_MOVABLE_TYPE'
Q_DECLARE_TYPEINFO(QChar, Q_MOVABLE_TYPE);
^
../../Qt/5.7/ios/include/QtCore/qchar.h:573:41: error: unknown type name 'QChar'
Q_DECL_CONSTEXPR inline bool operator==(QChar c1, QChar c2) Q_DECL_NOTHROW

{ return c1.ucs == c2.ucs; }
^
../../Qt/5.7/ios/include/QtCore/qchar.h:573:51: error: unknown type name 'QChar'
Q_DECL_CONSTEXPR inline bool operator==(QChar c1, QChar c2) Q_DECL_NOTHROW { return c1.ucs == c2.ucs; }

^
../../Qt/5.7/ios/include/QtCore/qchar.h:574:41: error: unknown type name 'QChar'
Q_DECL_CONSTEXPR inline bool operator< (QChar c1, QChar c2) Q_DECL_NOTHROW

{ return c1.ucs < c2.ucs; }
^
../../Qt/5.7/ios/include/QtCore/qchar.h:574:51: error: unknown type name 'QChar'
Q_DECL_CONSTEXPR inline bool operator< (QChar c1, QChar c2) Q_DECL_NOTHROW { return c1.ucs < c2.ucs; }

^
../../Qt/5.7/ios/include/QtCore/qchar.h:576:41: error: unknown type name 'QChar'
Q_DECL_CONSTEXPR inline bool operator!=(QChar c1, QChar c2) Q_DECL_NOTHROW

{ return !operator==(c1, c2); }

^
fatal error: too many errors emitted, stopping now [-ferror-limit=]

• • BUILD FAILED **