New install, error with "qmake".

jsulm

@bogwon QtCreator does not use qmake from PATH - instead it uses qmake defined in the Kit you're using. The reason for this is that you can have as many different Qt versions installed as you need. Please check your Kit in "Tools/Options.../Build & Run/Kits" - are there any errors/warnings?
"The QT package promises to include everything you need to build QT programs" - this is not correct. It promises to include its own tools, but compiler are not part of it (except MinGW on Windows). Make sure g++ is installed.

bogwon

@jsulm "Tools/Options.../Build & Run/Kits" looks fine. Screenshot: (http://imgur.com/PejHdgW)
This forum's "insert image" widget does not seem to work with imgur.

jsulm

@bogwon There is no C++ compiler set, only C. You need C++ compiler. Check the Compilers tab.

kshegunov

From your screenshot it's apparent you have no c++ compiler.

SGaist

To add to my fellows who already noted it and since you are on Linux, you need to install g++ as well.

Note that I find it surprising that it's not already the case since you seem to have your distribution installed Qt development environment.

bogwon

OK, we're making progress. g++ was missing, installed it and the qmake error went away. Now when I try to build an example it complains about GL/gl.h missing.

I have some OpenGL stuff installed, my old OpenGL program compiles and runs, so I am at a loss here as to what is needed.

I could have sworn that in my last go-round with Linux the c++ compiler was installed by default, and may even have been the same as the C compiler.

jsulm

@bogwon C++ compiler is not the same as C compiler. GNU Compiler Collection (GCC) is a collection of different compilers, one of them is C++, it is called g++.
Regarding the error: install mesa-common-dev and libgl1-mesa-dev packages

mrjj

Besides qt5-default
this works every time
https://wiki.qt.io/Install_Qt_5_on_Ubuntu

bogwon

@jsulm That did it! Thanks.

SGaist

Great !

Then please mark the thread as soled using the "Topic Tools" button so that other forum users may know a solution has been found :)

bogwon

@jsulm C & c++ compilers are different animals now, but I am pretty sure that not too long ago there was one compiler that did both. Albeit, 'not too long ago' might mean ten or 20 years.

bogwon

I got a blog post out of this, if you are curious.

rohan22

""........Error while building/deploying project project_2 (kit: Desktop Qt 5.8.0 MSVC2015_64bit)
When executing step "qmake".........""
am using windows os..i am new to this help me

mrjj

@rohan22
HI
Did you install the Qt visual 2015 packet ?

Also, did you go download the actual visual studio compiler from microsoft site ?

It must match. Qt version and Visual studio version

So it wont work if u installed say vs 2013 or vs 2017

rohan22

@mrjj
i am trying to install that pacaket.but i think it has different extension ".vsix" so i don"t know how to do it..
there is microsoft visual c++ 2015 showing in my pc"s control panel..

mrjj

@rohan22

Hi
Not sure what that is.
Make sure you check on C++ in VS installer. Its not on pr default.
Also no debugger pr default . must also be installed.
the b4 bit version
and make sure the Qt version macth your compiler.
https://download.qt.io/archive/qt/5.8/5.8.0/qt-opensource-windows-x86-msvc2015_64-5.8.0.exe

If all fails and you really just wanted to use Qt and not have to use Visual Studio
then try
https://download.qt.io/archive/qt/5.8/5.8.0/qt-opensource-windows-x86-mingw530-5.8.0.exe
It has compiler and debugger with :)