Working project failing to build

[gpuckett]

I am using Qt Creator to work on a project. Qt Creator is v3.1.2 based on Qt 5.3.1 (MSVC 2010, 32bit). After getting a significant part of the application coded and tested I was adding a couple of new modules. I started getting errors in Qt code!!! I have no idea what is causing it.

So I decided to start a new project and add the old code one module at a time. I have a global header file that I use to define various structures that are passed between modules. I have not changed this module at all. It has been working fine up to this point.

Here is the module:

#ifndef GLOBAL_H
#define GLOBAL_H
 
#include <QString>
 
struct _RoadsData {
  QString state;
  QString cnty;
  QString name;
  QString mtfcc;
  QString rttype;
  int roadtype;
  QString geometry;
};
 
struct _ContourData {
  QString state;
  QString cnty;
  int type;
  QString geometry;
};
 
struct _ImperviousData {
  QString state;
  QString cnty;
  int type;
  QString geometry;
};
 
struct _AreaObjectsData {
  QString state;
  QString cnty;
  int type;
  QString name;
  QString geometry;
};
 
struct _ParcelData {
  QString state;
  QString cnty;
  QString address;
  QString geometry;
};
 
struct _PointObjectsData {
  QString state;
  QString cnty;
  int type;
  QString name;
  QString geometry;
};
 
struct _AddrPointData {
  QString state;
  QString cnty;
  int stnbr;
  QString geometry;
};
 
 
Q_DECLARE_METATYPE(_RoadsData)
Q_DECLARE_METATYPE(_ContourData)
Q_DECLARE_METATYPE(_ParcelData)
Q_DECLARE_METATYPE(_AddrPointData)
Q_DECLARE_METATYPE(_ImperviousData)
Q_DECLARE_METATYPE(_AreaObjectsData)
Q_DECLARE_METATYPE(_PointObjectsData)
#endif // GLOBAL_H

#ifndef GLOBAL_H
#define GLOBAL_H

#include <QString>

struct _RoadsData {
  QString state;
  QString cnty;
  QString name;
  QString mtfcc;
  QString rttype;
  int roadtype;
  QString geometry;
};

struct _ContourData {
  QString state;
  QString cnty;
  int type;
  QString geometry;
};

struct _ImperviousData {
  QString state;
  QString cnty;
  int type;
  QString geometry;
};

struct _AreaObjectsData {
  QString state;
  QString cnty;
  int type;
  QString name;
  QString geometry;
};

struct _ParcelData {
  QString state;
  QString cnty;
  QString address;
  QString geometry;
};

struct _PointObjectsData {
  QString state;
  QString cnty;
  int type;
  QString name;
  QString geometry;
};

struct _AddrPointData {
  QString state;
  QString cnty;
  int stnbr;
  QString geometry;
};


Q_DECLARE_METATYPE(_RoadsData)
Q_DECLARE_METATYPE(_ContourData)
Q_DECLARE_METATYPE(_ParcelData)
Q_DECLARE_METATYPE(_AddrPointData)
Q_DECLARE_METATYPE(_ImperviousData)
Q_DECLARE_METATYPE(_AreaObjectsData)
Q_DECLARE_METATYPE(_PointObjectsData)
#endif // GLOBAL_H

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The project builds clean if I haven't yet used this file. As soon as I include it in a module I get the following error for each of the declares:

C3646: 'Q_DECLARE_METATYPE' : unknown override specifier

I also get

C2091: function returns function

in global.h

Also I get a bunch of errors in iterator and xfunctional.

In searching this error I found a suggestion that I put in an include for QMetaType. (It worked fine before this without that include.) I put it in. The errors went away in global.h. But now I'm getting errors in iterator, qlist.h, qscopedpointer.h and qobject_impl.h.

I don't know what to do!!! Please help.

[ChrisW67]

What Qt version and Microsoft Visual C++ compiler version are you using to build your project? This is not the same thing as the compiler and Qt version used to build Qt Creator.

Do you have C++11 options in your PRO file? "override" is a C++11 specifier.

It would generally help if you published the entire compiler output providing context to the warning/error message.

The C++ specification reserves identifier names starting with an underscore and upper-case letter (or just an underscore in global scope, or two underscores anywhere in the identifier) for the compiler implementation. You are using these for your struct type names, and this may be causing an issue.
http://stackoverflow.com/questions/2...a-c-identifier