Limit on QRC item file size?

MDCato

I was wondering if there was a limit on how big a file you can add to the QResource, and I created a random data file that was only 256MB in size, but trying to compile it my computer ran OOM (32 GB RAM). Is there anyway to simply add a few flags or some other qt magic to let me compile this QRC file without the OOM problem?

MDCato

This is how to reproduce the OOM

testqrc2binary
├── data.bin
├── main.cpp
├── main.qrc
└── testqrc2binary.pro

$ dd if=/dev/urandom bs=$((1024*1024)) count=256 status=progress > data.bin
$ cat main.cpp
#include <QCoreApplication>
#include <QFile>
#include <QTimer>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QFile f("://data.bin");
    f.open(QFile::ReadOnly);

    QTimer::singleShot(250, &a, &QCoreApplication::quit);
    return a.exec();
}
$ cat main.qrc
<RCC>
    <qresource prefix="/">
        <file>data.bin</file>
    </qresource>
</RCC>
$ cat testqrc2binary.pro
QT -= gui
CONFIG += c++11 console
CONFIG -= app_bundle
DEFINES += QT_DEPRECATED_WARNINGS
SOURCES += main.cpp

qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES += \
    main.qrc

Bonnie

try

CONFIG += resources_big

But it is not a good design to have so big resource since it will be compiled to your executable file.

kshegunov

Or alternatively don't build the resource into the binary, but load it at runtime instead.

MDCato

@Bonnie said in Limit on QRC item file size?:

CONFIG += resources_big

Yeah thanks, that was exactly what I was looking for