Qt GLFW and GLEW setup

SGaist

Please, read the documentation of the libraries you want to use. It's explained right in their website.

bence

just another think link somebody says

LIBS += -LC:\Qt\5.13.0\mingw73_64\lib\libQt5OpenGL.a -lopengl64

It should work but it does not work for me

bence

@SGaist

Other thing is that at glfw\lib-mingw-w64 there is 3 files

glfw3.dll
libglfw3.a
libglfw3dll.a

these are libarys so I assume that I could include that so right click add external libary I add: libglfw3.a

.pro file

TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.cpp


INCLUDEPATH += C:\glfw\include

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3d
else:unix: LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3

INCLUDEPATH += $$PWD/../../../../glfw/lib-mingw-w64
DEPENDPATH += $$PWD/../../../../glfw/lib-mingw-w64

So it looks good but when I try to build the program I get errors

:-1: error: cannot find -lglfw3d
:-1: error: collect2.exe: error: ld returned 1 exit status

JonB

@bence said in Qt GLFW and GLEW setup:

error: cannot find -lglfw3d

I don't know whether it would give rise to that error message, but I do not see either a .dll or a .a having that trailing d in its name. When using MSVC, debug libraries have a d on the end of their name, but I don't think that is the convention when using gcc/mingw. So are you using a linker line designed for MSVC with a build using MinGW?

bence

@JonB said in Qt GLFW and GLEW setup:

MSVC

At C:\glfw\lib-vc2019 there is 3 files glfw3.dll glfw3.lib glfw3dll.lib

At C:\glfw\lib-mingw-w64 there is 3 files glfw3.dll libglfw3.a libglfw3dll.a I am using this libary but I getting error I know that there is no d in name I add external libary I add libglfw3.a and I disable Mac and Linux platform and I also disable Add d suffix for debug version

lib-mingw-w64 there is nothing related to MSVS I guess

.pro

TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt

INCLUDEPATH += C:\glfw\include

win32: LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3

INCLUDEPATH += $$PWD/../../../../glfw/lib-mingw-w64
DEPENDPATH += $$PWD/../../../../glfw/lib-mingw-w64

SOURCES += main.cpp

I get 32 errors

undefined reference to `__imp_CreateDCW'
undefined reference to `__imp_GetDeviceCaps'
undefined reference to `__imp_DeleteDC'

....

JonB

@bence
The 3 unreferenceds you list come from WinGDI. You would need to link against something link Gdi32.lib for these, which I suspect you are not doing. Or, I don't know, those leading __imp_s might indicate you are still somehow trying to link against MSVC libraries.

In fact I even see a stackoverflow post covering this for GLFW MinGW link error, which you should read through and follow. It says MinGW has a library libgdi32.a for these.

bence

@JonB But there is no Gdi32.lib file in the folder

And if I just use the following code

int main(void)
{
    if (!glfwInit())
        return -1;
    return 0;
}

It still not woriking

JonB

@bence

But there is no Gdi32.lib file in the folder

Please read my post and act on it.

bence

@JonB

The only thing that I did is I add two file. I assume that I just have to do that.

.pro file

TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt

INCLUDEPATH += C:\glfw\include

SOURCES += main.cpp

win32: LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3

INCLUDEPATH += $$PWD/../../../../glfw/lib-mingw-w64
DEPENDPATH += $$PWD/../../../../glfw/lib-mingw-w64


win32: LIBS += -L$$PWD/../../../../MinGW/lib/ -lgdi32

INCLUDEPATH += $$PWD/../../../../MinGW/include
DEPENDPATH += $$PWD/../../../../MinGW/include

win32: LIBS += -L$$PWD/../../../../MinGW/lib/ -lopengl32

INCLUDEPATH += $$PWD/../../../../MinGW/include
DEPENDPATH += $$PWD/../../../../MinGW/include

SGaist

It looks like you are mixing two different MinGW installations.