<SOLVED>error in basic C++ program

Technologist

Am programming in C++ and made a skeleton program to play around with. Just experimenting a bit.

Wizard: Application--> Qt console app

 .pro

QT       += core

QT       -= gui

QT       += widgets

TARGET = Hello_World_console
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

main.cpp

#include <QCoreApplication>
#include <iostream>
using namespace std;

int main ()
{
    int num1,num2;
   
    return 0;
}

Get this error:
:-1: error: C:/Qt/Tools/mingw491_32/bin/../libexec/gcc/i686-w64-mingw32/4.9.1/liblto_plugin-0.dll: error loading plugin: "C:\Qt\Tools\mingw491_32\bin..\libexec\gcc\i686-w64-mingw32\4.9.1\liblto_plugin-0.dll":

Any thoughts?

Chris Kawa

Not really a straightforward answer but few things to notice:

QT -= gui
QT += widgets
This makes little sense. If you want a console app don't add widgets.

"C:\Qt\Tools\mingw491_32\bin..\libexec\gcc\i686-w64-mingw32\4.9.1\liblto_plugin-0.dll"
There's a missing \ after bin. Is that the output you're getting or is it an output -> forum transfer mistake?

The internet wisdom suggest two problems with the lto plugin in MinGW: one - it doesn't like spaces in paths. Does your project live in such location? A longshot but there's also a bug report on packaging of some versions of MinGW where they would add a 64bit plugin to a 32 bit compiler. Can you share some bittness info of your build and OS? In any case a workaround is to remove the -flto from the compiler command line so you might try that.

Technologist

"C:\Qt\Tools\mingw491_32\bin..\libexec\gcc\i686-w64-mingw32\4.9.1\liblto_plugin-0.dll"

\bin..\ - this goes down the tree terminating in the bin folder; then goes back up a directory and finds libexec then back down to liblto_plugin-0.dll which is there. You probably already see that - just thought I would verify.

This is a copy and paste -- no transfer error. OS Win 8.1 current on updates, 32gb ram, 64 bit sys. If you suggest that I do the workaround might need a few instructions. Also, I am not aware of any whitespaces. Fresh install of QT and Qt Creator. Could reinstall and see if the problem goes away (sorry abt the magical thinking). Interestingly when I install it never makes a shortcut for me.

Oddly the first few times I ran this it would work. I don't know what's changed since.
Would a direct include path to the location be helpful?

Technologist

Ok, works fine now. The only thing I am aware of doing is installing Eclipse and updating Java. Have no idea.