QuaZip - Undefined Reference

FluentCoding

Hey!

I have a problem when I want to add QuaZip to my project. I get 100 "undefined reference" errors, which is a result of a linking problem iirc.

include(util/singleApplication/singleapplication.pri)
include(util/quazip-0.9.1/quazip.pri)
LIBS += -lz

QT       += core gui network

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
DEFINES += QAPPLICATION_CLASS=QApplication

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    const/commonfilepaths.cpp \
    const/commonfolderpaths.cpp \
    const/commonmessageboxes.cpp \
    const/sources.cpp \
    fetcher/builddownloadinfofetcher.cpp \
    fetcher/buildinfofetcher.cpp \
    dialog/buildpathdialog.cpp \
    dialog/downloadbuildsdialog.cpp \
    util/buildpathsmanager.cpp \
    util/dolphinbuildscanner.cpp \
    util/qeasyfile.cpp \
    util/stylesheetloader.cpp \
    view/buildoptionsview.cpp \
    view/buildtreeview.cpp \
    main.cpp \
    mainwindow.cpp \
    util/filedownloader.cpp \
    util/hashfetcher.cpp \
    view/generaloptionsview.cpp

HEADERS += \
    const/commonfilepaths.h \
    const/commonfolderpaths.h \
    const/commonmessageboxes.h \
    const/sources.h \
    fetcher/builddownloadinfofetcher.h \
    fetcher/buildinfofetcher.h \
    dialog/buildpathdialog.h \
    dialog/downloadbuildsdialog.h \
    struct/buildpathentry.h \
    struct/dolphinbuild.h \
    util/buildpathsmanager.h \
    util/dolphinbuildscanner.h \
    util/qeasyfile.h \
    view/buildoptionsview.h \
    view/buildtreeview.h \
    mainwindow.h \
    util/stylesheetloader.h \
    util/filedownloader.h \
    util/hashfetcher.h \
    view/generaloptionsview.h

FORMS += \
    dialog/buildpathdialog.ui \
    dialog/downloadbuildsdialog.ui \
    mainwindow.ui

RESOURCES += resources.qrc

What am I doing wrong? The lineLIBS += -lz should import the integrated zlib dependeny from QT so I don't see what I'm doing wrong here.

mrjj

@FluentCoding
I only seen it here on forums. I compiled it once in linux but not tried on
Windows hence my questions to see what zlib you used.
if binary, i think its a compiler mismatch issue you are seeing.

I used
https://github.com/kuba--/zip
which is very small and easy to use/compile but
only support zip files.
But for my use case it was ok and speed and compression is super.

raven-worx

@FluentCoding
maybe your issue is solved by simply rerunning qmake and do a full rebuild?

FluentCoding

This post is deleted!

FluentCoding

@raven-worx
No, it didn't work :( I rebuilt it and also tried to create a Release Build besides a Debug one but the same error still occurs.

FluentCoding

Can anyone help me? :/

mrjj

@FluentCoding said in QuaZip - Undefined Reference:

QuaZip

Hi
Did you compile all of QuaZip yourself so we know the compiler used for app and for lib is the same and therefore compatible?
OR did you download a precompiled lib and try to link to that ?

Often undefined reference comes down to
32/64 bit mismatch
compiler mismatch
It simply don't find it

You do have zlib installed in a normal system place for your platform ?

Bonnie

@FluentCoding
I think this project is supposed to be linked as library, not directly added to other projects.
And what you are doing is something like static linking. So I think you should add

DEFINES += QUAZIP_STATIC

to your .pro file.
Otherwide the headers will think the classes as "dllimport"

FluentCoding

@mrjj https://github.com/stachenov/quazip I've downloaded the source and just included it to the project. I also tried to build it but I got some errors. I also have installed zlib but it didn't work, I've uninstalled it. I then added the line LIBS += -lz so that QT's internal zlib library gets added but that didn't work either.

@Bonnie I have already tried it and it didn't work either. It also didn't remove the dllimport warnings.

mrjj

@FluentCoding

Windows or linux ?

FluentCoding

@mrjj Win10

mrjj

@FluentCoding
Ok did you see
"Also note that you may or may not need to define ZLIB_WINAPI (qmake DEFINES+=ZLIB_WINAPI) when linking to zlib on Windows, depending on how zlib was built (generally, if using zlibwapi.dll, this define is needed)."

From where did you install zlib ?

FluentCoding

@mrjj From their homepage (the *.msi installer)

mrjj

@FluentCoding
https://zlib.net/ ?
and then some of external links ?

I wondering if its for older compiler if not source code.

FluentCoding

No, don't think so. Have you ever worked with QuaZip? Or are you aware of any good alternative? I was unlucky with KArchive too.

mrjj

@FluentCoding
I only seen it here on forums. I compiled it once in linux but not tried on
Windows hence my questions to see what zlib you used.
if binary, i think its a compiler mismatch issue you are seeing.

I used
https://github.com/kuba--/zip
which is very small and easy to use/compile but
only support zip files.
But for my use case it was ok and speed and compression is super.

FluentCoding

@mrjj Thats perfect, thanks! I only need it for zip iirc.

mrjj

@FluentCoding
Ok :)
Do note.

It has no recursive function to add all files in all folders but using Qt that is not hard to add.

I tested it with a 1 GB zip file which it handled ok. I cannot say for larger.

It does not support 64 bit zip file so if you get yours from an external source it might be an issue.

FluentCoding

Oh aight. Btw is it possible to open a zip file from a QByteArray (from memory generally)? @mrjj

Christian Ehrlicher

@FluentCoding said in QuaZip - Undefined Reference:

Btw is it possible to open a zip file from a QByteArray (from memory generally)?

yes

FluentCoding

@Christian-Ehrlicher How, if I may ask? I haven't found the appropiate method for that.