QT install, fourth attempt

JKSH · B BKBK 14 Dec 2018, 01:06

@BKBK said in QT install, fourth attempt:

Please tell me exactly what dev tool I need to install.

The one with "C++" in its name, for Windows (You listed it as "Desk development with C++")

BKBK · wrote on 15 Dec 2018, 20:19

After installing all those goodies, include the item verified by JKSH, I try again.
I really feel like a dunce here. If someone could sit beside me they would be able to get this working in a few minutes.
I very much appreciate the time and patience from each of you.

Starting from the beginning.
Launch QT Creator 4.8.0
Select Examples
Select Basic Layouts Example
From the new dialog select Running the Example
The dialog changes and displays: For more information, visit Building and Running an Example.
Click that link to open this web page:
http://doc.qt.io/qtcreator/creator-build-example-application.html
It regresses and advises: In the Welcome mode, select Examples (1).
Ok, follow those steps:
main.cpp is opened

In the Welcome mode, select Examples (1).
a. Did that to get the list of examples
Select Basic Layouts
a. Main.cpp is displayed
To check that the application code can be compiled and linked for a device, click the Kit Selector and select a kit for the device.
a. The only thing close is: Build -> Open Build and Run Kit Selector
b. To get a temporary dialog that I cannot capture to post. It states
c. The project basic layouts is not configured. You can configure it in the Projects Mode
d. The two words Projects Mode are a link so select that.
e. Back to the instruction: … select a kit for the device.
f. Now, what is a kit?
g. Click menu item Help -> Index
i. That is not an index.
h. Click Help -> Contents
i. No help
i. Internet search, here is a possibility: http://doc.qt.io/qtcreator/creator-targets.html
i. OK, got a possible definition of kit.
j. Back to the instructions: Select Tools > Options > Kits > Add.
k. There is an error indicator and shown here:

l. Notice the red circle enclosing an exclamation mark.
m. Hover the mouse over it, very carefully and just right, to get the same image I posted a few days ago.
n. There is an INTERNAL CONTRADICTION.
o. Please re-read that sentence at least once more.
p. The dialog states MSVC 2017, the title of the hover popup states MSVC 2017, but the text of the dialog states msvc2012-pe-64 bit.
q. I don’t know how to fix that, but will try anyway.
r. Click it to open the dialog and select Compiler -> C++
s. That field currently states: Microsoft Visual C++ Compiler 11.0 (amd64)
t. Ok, found two later candidates:
i. Microsoft Visual C++ Compiler 15.0 (amd64)
ii. Microsoft Visual C++ Compiler 15.0 (amd64_x86)
iii. There are versions with (amd64_x86) and (x86_amd64) Note the reversal of terms. I did not find anything that discussed that aspect.
u. Some searching “indicates” the better choice might be x86_amd64, select that for C and C++. I have an AMD processor so selected: amd64_x86.
v. For debugger only one choice: GNU gdb 7.8 for MinGW 4.9.2 32bit
w. Maybe I have a kit selected, don’t know for sure.
x. Click Apply, Ok
4. Step 4 says Click (Run) to build and run the application.
5. Don’t have that.
6. There is on in the bottom left corner that might bit it.

7. It is greyed out.
8. Go to menu item Build, Run is disabled.
9. Click Build -> Build file “main.cpp”
10. No noticeable results
11. Click Build -> Generate Compilation Database for “basiclayouts.”
12. No noticeable results. Build -> Run is not enabled.
13. Look along the bottom and see if there is anything in the 8 tabs there.
14. Nothing
Lets see if anything changed. Click Build -> Open and Build Run Kit Selector to get

Why are there three identical rows?
Examine each and the details are identical.
Get a hover dialog

There is a line tagged as Error: but I cannot determine what the error really is or how to correct it.

I stop here in the hopes that someone will point out my errors.

SGaist · wrote on 15 Dec 2018, 20:29

Use the amd64, what you selected now is a cross-compiler to do 32 to 64bit compilation.

amd64 is the original name for the 64bit architecture known now as x86_64 because AMD were the first to produce a 64bit version of the x86 architecture. So amd64 and x86_64 are synonyms.

BKBK · wrote on 16 Dec 2018, 02:21

From SGaist I changed the selection to: Microsoft Visual C++ Compiler 15.0 (amd64) for both C and C++ compiler. Now the hover message looks better as it states:

Warning: The ABI of the selected debugger does not match the tool chain ABI.

It no longer has the warning about the compiler not working. As I started to chase down the VS debugger it occurred to me to ask:

The only option I am really aware of is Visual Studio. But I see things about the GNU tool chain. Which tool chain do I really want? Here are some drivers.

I am using G++ at work on a Centos Linux machine. There I am working Qt for interactive display and OpenGL to build a strip chart. Maybe that matters.

At home I have just started an Arduino project. The processor will sense temperatures, pressures, and currents in the compressor and air handler and provide data to an app on my PC. That app will show the status of our HVAC system. And that app is this Qt environment.

Have you a suggestion as to which tool set to select?

SGaist · wrote on 16 Dec 2018, 07:35

The debugger follows the same rule as the compiler: it must match the architecture.

As for the arduino, don't you have a specific tool chain for it ?

BKBK · 16 Dec 2018, 16:56

The Arduino does have its own IDE. I have installed that and it seems to be working.
Because of work I am leaning towards the GNU tool chain. I really don't know if there are any downsides to that so ask for opinions. I do have a Linux machine that I might fire up. However, I want to make my HVAC app available to most people and that audience is predominantly Windows.
What ever you, every read, suggests, it will be my decision, meaning only that I won't blame anyone. Still, I suspect there will not be a bad choice, just maybe one better than the other.

aha_1980 · B BKBK 16 Dec 2018, 16:19

Hi @BKBK,

On Linux you can use GCC and Clang, and if I remember correctly, both produce binary compatible code, so you can use both with one Qt version.

On Mac, IMHO, only Clang is used for a long time, probably because Apple said so.

For Windows, you can use the MSVC and the MinGW compiler with Qt.

For MSVC, you have to install the MS C++ compiler, the MS CDB console debugger and a suitable Qt MSVC version.

For MinGW, you can all install with the Qt online installer: the GCC compiler, the GDB debugger and the Qt MinGW version.

Both toolchains can create fully working Windows programs, however some external libraries are only supported on one of the two.

In Principle you can develop on one platform and you or someone else can compile on another platform, as long as you don't use System-specific APIs.

I hope that clearifies things a bit.

BKBK · wrote on 16 Dec 2018, 19:53

Thank you aha_1980
This this boils down to: Which will be easier to install and get working. The reasons for so much trouble getting the working are quite unclear, but I will continue the attempts.

SGaist · wrote on 16 Dec 2018, 20:30

If you want a quick and easy setup to start using Qt then the MinGW version is the way to go. You can install everything in one go: Qt, the compiler and debugger.

BKBK · 17 Dec 2018, 02:48

@SGaist said in QT install, fourth attempt:

MinGW

I am going with MinGW.
I found the MinGW web site and I think I installed it. Not positive, but lets see what happens.
Open QT Creator and get to here

Click Manage Kits to get:

How important is this Auto-detected versus Manual. I cannot tell. But I have MinGW installed and do not want MSVC so try to remove all the MSVC and install the MinGW.
Start with the Auto-detected by clicking on the item to get

Go to Compiler -> C++ and direct it to the MiGW directory.
No, that does not work.
Click on button Manage to the right. To get:

Don’t want all the Microsoft entries, there is a Remove button that is activated when a line is selected, so do a bunch of removes.

As this is being done manually, click on Manual -> C++, that does nothing.
Click on the Add button, not shown in the previous image.
Add -> MinGW -> C++ to get a selection dialog.
Browse to the path to get here

Question: What belongs in the fields: Platform codegen flags, Platform linker flags, and ABI?

To continue, click Apply. It does not acknowledge the button click.
Click OK. The form closes. But debugger was not set.
Click Manage Kits again and select debuggers to get

Note that it reports 32 bit. I have always selected 64. I don’t know how important this is so continue
Back to here: image Sunday 08

After all that work, Qt Creator is still set up for MSVC 2017.
I don’t know what to do different. Please advise.

JKSH · 18 Dec 2018, 03:23

OK @BKBK, you've tried lots of different things recently and now you have numerous overlapping installations. It is best to start from scratch again.

If you follow these steps carefully and thoroughly, you will have a working system:

In Qt Creator go to the Kits tab and Remove your 2 Manual kits ("Desktop" and "Unnamed"):
Close Qt Creator.
Go to the folder where you installed Qt (C:\Qt ?) and run MaintenanceTool.exe. Uninstall everything.
Uninstall everything in C:\MinGW too.
Run the Qt installer again. Select these 2 items (no more, no less):
- Qt > Qt 5.12.0 > MinGW 7.3.0 64-bit
- Qt > Tools > MinGW 7.3.0 64 bit
Run Qt Creator and compile an example.

That's it. You don't need to install or configure anything else.

If it still doesn't work, do not change any settings; doing so will complicate things further. Post screenshots and we'll have a look.

Question: What belongs in the fields: Platform codegen flags, Platform linker flags, and ABI?

Those fields are for cross-compilers. You don't need them if you follow the steps above carefully and thoroughly.

BKBK · wrote on 17 Dec 2018, 05:08

I am working that. Thank you.

jsulm · B BKBK 17 Dec 2018, 01:36

@BKBK said in QT install, fourth attempt:

I found the MinGW web site and I think I installed it

Please don't!
Simply use Qt Online Installer or Qt Maintenance Tool (if Qt is already installed) and select Qt MinGW AND MinGW. It will install MinGW which is proven to work with Qt you're installing.

BKBK · 18 Dec 2018, 06:52

@JKSH Ok then, I can build the example project. I had to add a few more steps to configure the project, but then it built and ran.

@jsulm Too late, I had already done that. Then I followed the instructions from JKSH, deleted everything, installed a fifth time, and now am up and running.

Qt is working now.
Thank you all for your time and patience.

jsulm · B BKBK 18 Dec 2018, 03:23

@BKBK OK, that's fine. But next time if you install Qt you should do it like I suggested - for me it was always working out of the box.
Happy coding!