NCreport2 help?

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14th June 2008, 03:49
triperzonak

NCreport2 help?

here are my steps following the use guide:

i include the includes of ncreport2 to INCLUDEPATH = ../include

i add the ncreport2.lib as LIBS+= ..lib/ncreport2.lib

i include them to my project as

#include "../preview/ncreportpreviewwindow.h"
etc..

after these three procedure i have no errors but after i add this line to my project

NCReport *report = new NCReport();

i got "undefined reference to `NCReport::NCReport(QObject*)'"

what ya think bout my error?:confused:
14th June 2008, 08:14
jpn

Re: NCreport2 help?

I'm afraid the content of LIBS variable is not correct. For a reason or another the lib is not getting linked.
14th June 2008, 09:45
triperzonak

Re: NCreport2 help?

Quote:

Originally Posted by jpn

I'm afraid the content of LIBS variable is not correct. For a reason or another the lib is not getting linked.

i suspect that too but after i read the qt documentation about sharing/linking of library i only got LIBS+= .lib file..

i only include that line to my .pro file and build. (am i missing something)

i try changing the path of .lib then error in building the file which mean it is really looking for the .lib

ncreport2 only have includes (which are .h) and lib that have ncreport2.lib, ncreport2.dll and ncreport2.exp

tnx for reply
16th June 2008, 03:48
triperzonak

Re: NCreport2 help?

i found the problem..

it is in the .h in importing the dll

#ifdef Q_WS_WIN
# if defined(NCREPORT_EXPORT)
# define NCREPORT_LIB_API __declspec(dllexport)
# elif defined(NCREPORT_IMPORT)
# define NCREPORT_LIB_API __declspec(dllimport)
# else
# define NCREPORT_LIB_API
# endif
#else
# define NCREPORT_LIB_API
#endif

i think its else if

but after i change elif to else if i got this warning
ncreport.h:50:8: warning: extra tokens at end of #else directive
ncreport.h:51:1: warning: "NCREPORT_LIB_API" redefined

is it wrong to use "else if"?
16th June 2008, 08:53
jpujolf

Re: NCreport2 help?

Add this line to your .pro file :

DEFINES += NCREPORT_IMPORT

And test. I think this may solve your problem...
16th June 2008, 10:51
triperzonak

Re: NCreport2 help?

tnx for the reply.. quite close but still far..

DEFINES += NCREPORT_IMPORT

yes i think i do need that.. but still got errors..
"undefined reference to `_imp___ZN8NCReportC1EP7QObject'"

i think the problem is in ncreport2.lib..

I copied the file to my project .pro

then add

LIBS += ncreport2.lib ? is this right?

plus i also copied the dll to the same path where my project is? again.. is this right?

as i posted earlier there is an error in syntax in defining the import/export class

Quote:

#ifdef Q_WS_WIN
# if defined(NCREPORT_EXPORT)
# define NCREPORT_LIB_API __declspec(dllexport)
# elif defined(NCREPORT_IMPORT)
# define NCREPORT_LIB_API __declspec(dllimport)
# else
# define NCREPORT_LIB_API
# endif
#else
# define NCREPORT_LIB_API
#endif

do i need to edit that and make it "else if"? but i think the next line after else will be ignore

plus this uses "__declspec(dllexport)" do i need to change that to "Q_DECL_EXPORT" and same with import?

in the ifdef Q_WS_WIN do i need to specify that im using WIN OS or it is automatically detected?

tnx
16th June 2008, 11:32
jpujolf

Re: NCreport2 help?

Quote:

Originally Posted by triperzonak

tnx for the reply.. quite close but still far..
"undefined reference to `_imp___ZN8NCReportC1EP7QObject'"

Simple : the library is not found at linking step. Check the syntax of LIBS part of .pro files ( documented here http://doc.trolltech.com/4.4/qmake-v...ence.html#libs )

Quote:

LIBS += ncreport2.lib ? is this right?

No, you have to put something like this :

LIBS += -L"/path/to/ncreport2.lib" -lncreport2

It must be enough. Test it...

Quote:

plus i also copied the dll to the same path where my project is? again.. is this right?

At runtime, probably you will need it if the directory where resides the DLL is not in the PATH, as you're running windows.

At compile/link time you only have to set correct paths on the LIBS section and everything must compile and link.

Quote:

as i posted earlier there is an error in syntax in defining the import/export class

do i need to edit that and make it "else if"? but i think the next line after else will be ignore

plus this uses "__declspec(dllexport)" do i need to change that to "Q_DECL_EXPORT" and same with import?

That line hasn't an error. #elif is a correct preprocessor reserved word. You don't have to touch nothing on header. Just make linker find the lib in the right place.

Quote:

in the ifdef Q_WS_WIN do i need to specify that im using WIN OS or it is automatically detected?

tnx

Q_WS_WIN is defined by QT, don't worry about it...

I hope this will be useful for you.
17th June 2008, 02:43
triperzonak

Re: NCreport2 help?

i try your post but still got errors.. jpujolf

Quote:

build/dialogimpl.o(.text+0xa14):dialogimpl.cpp: undefined reference to `_imp___ZN8NCReportC1EP7QObject'
collect2: ld returned 1 exit status
mingw32-make.exe[1]: *** [bin\mync.exe] Error 1
C:\MinGW\bin\mingw32-make.exe: *** [release] Error 2
g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -mthreads -Wl -Wl,-subsystem,windows -o bin\mync.exe build/dialogimpl.o build/main.o build/moc_dialogimpl.o -L"c:\Qt\4.3.5\lib" -lmingw32 -lqtmain c:/lib/ncreport2.lib -lQtSql4 -lQtXml4 -lQtGui4 -lQtCore4

i add this line to my project.pro

INCLUDEPATH += "C:/Program Files/NCReport2/include"
LIBS += "C:/Program Files/NCReport2/lib/ncreport2.lib" or
-L"C:/Program Files/NCReport2/lib" -lncreport2 or -L"C:/Program Files/NCReport2/lib"
-lncreport2
DEFINES += NCREPORT_IMPORT

to my project.cpp i only include
#include <QSqlDatabase>
#include "C:/Program Files/NCReport2/include/ncreport.h"
#include "C:/Program Files/NCReport2/include/ncreportoutput.h"
#include "C:/Program Files/NCReport2/include/ncreportpreviewoutput.h"
#include "C:/Program Files/NCReport2/include/ncreportpreviewwindow.h"

then
NCReport *report =new NCReport(); (note: no other declaration of NCReport, is this ryt?)

then when i build it the error shows..

hayzzzzzzzzzzzzz..
17th June 2008, 07:13
jpujolf

Re: NCreport2 help?

Quote:

Originally Posted by triperzonak

INCLUDEPATH += "C:/Program Files/NCReport2/include"

#include "C:/Program Files/NCReport2/include/ncreport.h"
#include "C:/Program Files/NCReport2/include/ncreportoutput.h"
#include "C:/Program Files/NCReport2/include/ncreportpreviewoutput.h"
#include "C:/Program Files/NCReport2/include/ncreportpreviewwindow.h"

So no need for the complete path in includes, only :

#include <ncreport.h>
#include <ncreportoutput.h>
#include <ncreportpreviewoutput.h>
#include <ncreportpreviewwindow.h>

Quote:

DEFINES += NCREPORT_IMPORT

That's right...

Quote:

LIBS += "C:/Program Files/NCReport2/lib/ncreport2.lib" or
-L"C:/Program Files/NCReport2/lib" -lncreport2 or -L"C:/Program Files/NCReport2/lib"
-lncreport2

Put EXACTLY this :

LIBS += -L"C:\Program Files\NCReport2\lib" -lncreport2

Quote:

Your compile output

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -mthreads -Wl -Wl,-subsystem,windows -o bin\mync.exe build/dialogimpl.o build/main.o build/moc_dialogimpl.o -L"c:\Qt\4.3.5\lib" -lmingw32 -lqtmain c:/lib/ncreport2.lib -lQtSql4 -lQtXml4 -lQtGui4 -lQtCore4

That's wrong !! As shown in the error you sent, you haven't put the LIBS line I wrote, or you haven't make qmake to generate a correct Makefile...

The link output must be something like this :

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -mthreads -Wl -Wl,-subsystem,windows -o bin\mync.exe build/dialogimpl.o build/main.o build/moc_dialogimpl.o -L"c:\Qt\4.3.5\lib" -L"C:\Program Files\NCReport2\lib" -lmingw32 -lqtmain -lncreport2 -lQtSql4 -lQtXml4 -lQtGui4 -lQtCore4

And again, take a look at qmake's / g++ documentation. I had initially the same problem and is well documented.
17th June 2008, 08:00
triperzonak

Re: NCreport2 help?
heres my .pro
Code:

TEMPLATE = app QT = gui core sql xml CONFIG += qt \ release \ warn_on \ thread \ no_lflags_merge \ dll \ console DESTDIR = bin OBJECTS_DIR = build MOC_DIR = build UI_DIR = build TARGET = mync FORMS = ui/dialog.ui HEADERS += src/dialogimpl.h SOURCES += src/dialogimpl.cpp src/main.cpp INCLUDEPATH += "C:/Program Files/NCReport2/include" DEFINES = NCREPORT_IMPORT LIBS += [B]-L "C:\Program Files\NCReport2\lib" -lncreport2[/B]
same error:

Quote:

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -Wl,-subsystem,console -mthreads -Wl -Wl,--out-implib,bin\libmync.a -o bin\mync.exe build/dialogimpl.o build/main.o build/moc_dialogimpl.o -L"c:\Qt\4.3.5\lib" -L "C:\Program Files\NCReport2\lib" -lncreport2 -lQtSql4 -lQtXml4 -lQtGui4 -lQtCore4
mingw32-make.exe[1]: Leaving directory `C:/mync2'
build/dialogimpl.o(.text+0xa14):dialogimpl.cpp: undefined reference to `_imp___ZN8NCReportC1EP7QObject'
collect2: ld returned 1 exit status
mingw32-make.exe[1]: *** [bin\mync.exe] Error 1
C:\MinGW\bin\mingw32-make.exe: *** [release] Error 2

if you notice i put -L<space>"<dir>" i cant do this -L"<dir>" (without space) same error

Quote:

"-Lc:\Program Files\NCReport2\lib" -lncreport2

tnx for your time..:)
17th June 2008, 09:00
jpujolf

Re: NCreport2 help?

Quote:

Originally Posted by triperzonak

LIBS += -L "C:\Program Files\NCReport2\lib" -lncreport2

same error:

if you notice i put -L<space>"<dir>" i cant do this -L"<dir>" (without space) same error

Why you can't ? "-Lc:\Program Files\NCReport2\lib" is wrong, -L"<path>" is correct, -L MUST be outside of quotes...

On the other hand, I've downloaded the windows version for NCReport2 and installed on a windows machine ( I work on a Linux box :) ). I've been looking the documentation and I've found the origin of the error :windows package provides ONLY VC++ libraries. I was blind !! g++ libraries have a "<library_name>.a" naming convention

You have two options :

- Write Norbert Szabo ( the author ) and "suplicate" a g++ distribution ( if Qt Open is g++ based, it's a more logical option make a NCReport g++ based, I think )

- Generate yourself a g++ library ( ncreport2.a ). You've tro generate da def file from DLL, generate a .a file and link it against your program...

Here's a guide ( for a python library, but you only have to change library name and all may work ). Take a look at section 2

http://sebsauvage.net/python/mingw.html

It works ?
17th June 2008, 10:39
triperzonak

Re: NCreport2 help?

Quote:

You have two options :

- Write Norbert Szabo ( the author ) and "suplicate" a g++ distribution ( if Qt Open is g++ based, it's a more logical option make a NCReport g++ based, I think )

- Generate yourself a g++ library ( ncreport2.a ). You've tro generate da def file from DLL, generate a .a file and link it against your program...
It works ?

nope.. i did build "ncreport2.a" and link it to my project but i guess is for python..

i still got the same error.. maybe ill try your first option but i think it will took more time..:(
17th June 2008, 10:49
jpujolf

Re: NCreport2 help?

Surely, You've made some error creating ncreport2.a file or haven't changed the .pro file properly.

What have you done exactly ? ( commands for creating the .a file & changes made to .pro file to point the correct library )
17th June 2008, 11:04
jpujolf

Re: NCreport2 help?

Surely, You've made some error creating ncreport2.a file or haven't changed the .pro file properly.

What have you done exactly ? ( commands for creating the .a file & changes made to .pro file to point the correct library )
17th June 2008, 12:38
triperzonak

Re: NCreport2 help?

Run : pexports ncreport2.dll > ncreport2.def
then

Run : dlltool --dllname ncreport2.dll --def ncreport2.def --output-lib ncreport2.a

then it generate ncreport2.a i copyed it and paste bedside my .pro

i add to LIBS+= ncreport2.a, (in ncreport1 it works but not in ncreport2..)

same error after build..
17th June 2008, 14:17
jpujolf

Re: NCreport2 help?

Quote:

Originally Posted by triperzonak

Run : pexports ncreport2.dll > ncreport2.def

OK

Quote:

then

Run : dlltool --dllname ncreport2.dll --def ncreport2.def --output-lib ncreport2.a

OK too...

Quote:

then it generate ncreport2.a i copyed it and paste bedside my .pro

Unnecessary, so ncreport2.a is generated at the same directory as DLL resides. No need to do it

Quote:

i add to LIBS+= ncreport2.a, (in ncreport1 it works but not in ncreport2..)
same error after build..

Incorrect !!

You have to put EXACTLY this in your LIBS entry at .pro file :

LIBS += -L"<path-to-library>" -lncreport2

As explained in mingw documentation, -L option is for adding a path to the library search, and -l option is for adding libraries, without extension.

Where <path-to-library> is only the path, not the complete name, and -lncreport means "library name is ncreport.a"

Do you understand now what I'm trying to explain ?
17th June 2008, 15:23
triperzonak

Re: NCreport2 help?

i follow this from documentation:

Quote:

unix:LIBS += -L/usr/local/lib -lmath
win32:LIBS += c:/mylibs/math.lib

im using windows so win32 is the right way to follow and it has note that says

Quote:

Note: On Windows, specifying libraries with the -l option, as in the above example, will cause the library with the highest version number to be used; for example, libmath2.lib could potentially be used instead of libmathlib. To avoid this ambiguity, we recommend that you explicitly specify the library to be used by including the .lib file name suffix.

and last.. i already use it and works in ncreport1 it uses libncreport.a too but i successfully link it..:D
17th June 2008, 15:38
jpujolf

Re: NCreport2 help?

So, no more ideas from me :(

It works for me as I explained to you...

Perhaps you may ask Norbert Szabo to find an answer.
12th July 2008, 15:44
triperzonak

Re: NCreport2 help?

my problem is now solve..

tnx nocisoft for releasing MinGW version of the reporting tool..

http://www.nocisoft.com/?id=down