NCreport2 help?

[jpn]

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

[triperzonak]

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

[triperzonak]

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"?

[jpujolf]

Add this line to your .pro file :

DEFINES += NCREPORT_IMPORT

And test. I think this may solve your problem...

[triperzonak]

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

#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

[jpujolf]

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 )

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...

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.

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.

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.

[triperzonak]

i try your post but still got errors.. jpujolf

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..

[jpujolf]

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>

DEFINES += NCREPORT_IMPORT

That's right...

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

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.

[triperzonak]

heres my .pro

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]

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]

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same error:

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

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

tnx for your time..

[jpujolf]

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 ?

[triperzonak]

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..

[jpujolf]

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 )

[jpujolf]

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 )