[Solved] Simple initializer problem

[Thanatos.jsse]

Hi,

I am developing a Qt program with three libraries, but when compile the project, compiler return a error:

In file included from ../../../Sipred/src/app/core.h:32:0,
_ from ../../../Sipred/src/app/main.cpp:29:_
../../../Sipred/src/managers/interface/interfacemngr.h:38:42: error: expected initializer before ':' token
make[ 2 ]: *** [../../.obj/release/main.o] Error 1

But I can't see anything wrong with that. If someone can take a look in my source code and give me advice about this problem I'll acknowledge.

Source code can be found at: "link":https://github.com/thanatosJSSE/Sipred/blob/master/src/managers/interface/interfacemngr.h

BR,

[Mario84]

I'm not sure if this is the problem, but:
You declared InterfaceMngr as follows:

[code]
class INTERFACEMNGR_EXPORT InterfaceMngr : public QObject
[/code]

...but the symbol INTERFACEMNGR_EXPORT isn't always defined:

[code]
#if defined(INTERFACEMNGRLIB_LIBRARY)

define INTERFACEMNGR_EXPORT Q_DECL_EXPORT

#else

define INTERFACEMNGR_IMPORT Q_DECL_IMPORT

#endif
[/code]

[Thanatos.jsse]

Hi Mr. Universe,

Thank you for answer, but I define the simbol using my *.pro file:

@# interface_mngr.pro
DEFINES +=
INTERFACEMNGRLIB_LIBRARY@

I thought that at the beginning, but ....

Best regards,

[franku]

Additionally you could run qmake again.

If you want to be clear which code is used by the preprocessor you want to use a statement like this:

@#error "Simple"@

But I don't understand why you define the EXPORT and the IMPORT macro when using only the EXPORT in your class definition.

[Thanatos.jsse]

Hi franku,

You are right, but DEFINES qmake adds the values of this variable as compiler C preprocessor macros (-D option). So, when I add the line:
@# interface_mngr.pro
DEFINES +=
INTERFACEMNGRLIB_LIBRARY@

it add

@#define INTERFACEMNGRLIB_LIBRARY@

Thank you for your time.

PD: When create shared lib follow this "link":http://doc.qt.nokia.com/4.7-snapshot/sharedlibrary.html#header-file-considerations

[franku]

Hi, I know. This is the reason why I asked you to rebuild your makefiles using qmake. Just to be shure having the -D commandline parameter being passed to the compiler. Read the contents of the link again carefully to see where the difference is to your code.

You can use the #error to stop the preprocessor if you want to know which line is really evaluated.

[Thanatos.jsse]

I have found a strange issue:

I delete all references to InterfaceMngr in the file core.h and core.cpp, and found that the library compile without errors, but when I try to use it, give the compile error referenced here before.

BR,

[akonradwesolutions]

Shouldn't it be:

@
#if defined(INTERFACEMNGRLIB_LIBRARY)

define INTERFACEMNGR_EXPORT Q_DECL_EXPORT

#else

define INTERFACEMNGR_EXPORT Q_DECL_IMPORT

#endif
@

otherwise, INTERFACEMNGR_EXPORT will not be defined when you try to use the exported symbol.

[Thanatos.jsse]

Hi Arnold,

I have other two similars definitions but don't have any problem.
The libraries "ModuleMngr":https://github.com/thanatosJSSE/Sipred/blob/master/src/managers/module/modulemngr.h and "PluginMngr":https://github.com/thanatosJSSE/Sipred/blob/master/src/managers/plugin/pluginmngr.h.

Thank you.

[akonradwesolutions]

In both pluginmngr_global.h and modulmngr_global.h the declaration looks like this

@
#ifndef PLUGINMNGR_GLOBAL_H
#define PLUGINMNGR_GLOBAL_H

#include <QtCore/QtGlobal>

#if defined(PLUGINMNGRLIB_LIBRARY)

define PLUGINMNGR_EXPORT Q_DECL_EXPORT

#else

define PLUGINMNGR_EXPORT Q_DECL_IMPORT

#endif

#endif // PLUGINMNGR_GLOBAL_H
@

which is exactly what i suggested.

Regards,
Arnold

[Neutron Stein]

If i am not wrong there is a missing ";" after Q_DECLARE_PRIVATE(InterfaceMngr):
@
private:
Q_DECLARE_PRIVATE(InterfaceMngr) ; //here

};
@

[Thanatos.jsse]

That's right, interfacemngr have his own interfacemngr_global.h.

And this looks like you suggest.

BR,

[Thanatos.jsse]

[quote author="Neutron Stein" date="1343136256"]If i am not wrong there is a missing ";" after Q_DECLARE_PRIVATE(InterfaceMngr):
@
private:
Q_DECLARE_PRIVATE(InterfaceMngr) ; //here

};
@[/quote]

There is no problem, I tried that too, without results.
I found that this library is compiled, but when I try to use it give me that error.

[Thanatos.jsse]

Ok,

Thank everyone that helped me to take a look to mi code.
Well the problem was a personal mistake:

@#if defined(INTERFACEMNGRLIB_LIBRARY)

define INTERFACEMNGR_EXPORT Q_DECL_EXPORT

#else

define INTERFACEMNGR_IMPORT Q_DECL_IMPORT <---- ERROR!!!

#endif@

Must be EXPORT like Arnold said

BR,