QMAKE_MSC_VER isn't set

Question

After I changed my Qt Version from 5.5.1 to 5.12.0 I get following message while I try to build any project:

msvc-version.conf loaded but QMAKE_MSC_VER isn't set

I selected the Qt 5.12.0 MSVC2017 32bit Kit instead of the Qt 5.5.1 (msvc 2013) Kit.

Does anybody know the reason for this message and could explain me how I should fix it?

score 50 · Answer 1 · answered Jan 23 '19 at 01:48

50

Try removing any .qmake.stash files in your projects. This fixed this same issue for me when building QT from source after previously building with a different target.

answered Jan 23 '19 at 01:48

pdx_interactives

628
5
7

take note that the stash file is invisible. that took me some time to figure out. deleting it worked. – David M. Cotter Sep 06 '20 at 20:11
1

if removing .qmake.stash didn't work (that was the case when I tried it), try running `qmake` with the option `-nocache`. – Roman Schaub Oct 30 '20 at 07:18
I just ran into this AGAIN, googled, found this answer AGAIN, and saw my own note above. This time, i found the invisible .qmake.stash file TWO LEVELS UP from my project file??!? – David M. Cotter May 22 '21 at 00:19

score 4 · Answer 2 · answered Dec 28 '20 at 09:49

4

I ran into this error message after returning to a project I hadn't worked on in a year. I solved it by deleting the project's .pro.user file. (It seems to have been looking for a build kit I had gotten rid of at some point in the year.)

answered Dec 28 '20 at 09:49

adam.baker

1,447
1
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score 2 · Answer 3 · answered May 27 '21 at 06:25

2

Open msvc-version.conf (in my case in C:\Qt\Qt5.12.8\5.12.8\msvc2017_64\mkspecs\common)

add

QMAKE_MSC_VER = 1929

at the beginning (for VS2019).

answered May 27 '21 at 06:25

score 0 · Answer 4 · answered Sep 16 '22 at 18:41

In older Qt versions, like Qt 5.6, which is last version that allows v2.1 of LGPL license.

Such thing as QMAKE_MSC_VER does not exist.

Simply create it, like:

Open mkspecs/common/msvc-desktop.conf file (from to Qt-sources) in editor.
Find:
```
unset(MSC_VER)
```

Replace it with below and done:

QMAKE_MSC_VER = $$MSC_VER
unset(MSC_VER)

score 0 · Answer 5 · answered May 15 '23 at 12:57

0

If your intended compiler isn't MSVC to begin with, but rather MinGW, be sure you have the correct project configuration selected! :)

answered May 15 '23 at 12:57

BuvinJ

10,221
5
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QMAKE_MSC_VER isn't set

5 Answers5