Issue building qt 5.12 from latest git repo

SGaist

Hi,

What if you remove the -no-pch option ?

code_fodder

thanks for your suggestion SGaist

So I ran:

configure ... without -no-pch (pre-compiled headers I think?)
ming32-make -j8

It started to recompile, but hit the same issue. Two questions for you:

Do I need to clean the old configuration first?
Do I need to do a make clean?
Why do you suspect that -no-pch is a problem (just for my understanding)?

I read somewhere that QVector is there, and if you replace the #include <QVector> with #include "qvector.h" that file then compiles - I tired this an it worked - but it just fails further on. <QDebug> is the next one - again if I lower-case it then that file compiles.

SGaist

Yes
Better would be to use an out of source build
Such an idee, since the header is missing I was wondering whether the generated headers were properly created and if that option could be responsible.

code_fodder

@SGaist Ok - I am doing a git clean (at least for the top level) then a reconfigure.

Weirdly ...-make clean seems to go on forever! stopped eventually.

Sorry, what do you mean by out of source build - how do I do that (or link to how to do that)?

Thanks :)

SGaist

As the name suggest, you build from a folder that is not in the sources.

Unix style:

cd /tmp
mkdir build_qt
cd build_qt
/path/to/configure
make
make install

It's easy to adapt to Windows.

By the way, why not use the MinGW version provided with Qt ?

kshegunov

As it happens I was building 5.12.2 from source today. Long story short I hit the same problem you had, but in another module and another header. It was caused by a stale configuration cache file. So, run the "really clean tree" command from the wiki and it should fix itself. I do second @SGaist's advice to build out of the source tree, however!

code_fodder

@kshegunov Thanks for that, I was literally just trying to phrase a git command to clean everything - so that's a very timely reply : ))

I am not sure why I would have a stale config file though, since I checked out fresh, but I will definitely try this! - Also by using a "not in the source" build folder as @SGaist also mentioned then the stale config file issue should disappear anyway (I think) since its a fresh folder.

Anyway... trying now..

code_fodder

@SGaist With regard to the mingw that comes with qt - I did not see that in the repo? There is a folder called gnuwin32 but that just contains a few other tools - no gcc/make tools.

code_fodder

@SGaist @kshegunov hummm.... after a complete clean and build in a different folder and removed -no-pch, I still get the same error : (

SGaist

It's provided through the installer but right now I can't tell exactly where you can get it from outside of said installer.

kshegunov

@code_fodder said in Issue building qt 5.12 from latest git repo:

I did not see that in the repo?

There's no compiler in the repo. When building from git it's your responsibility to have to toolchain set up beforehand. @SGaist is thinking about the online installer for Qt, which indeed comes with a mingw distribution that can be used directly.

kshegunov

Could you post the configure summary as well, so we know what we're dealing with?

code_fodder

@SGaist @kshegunov Ah, ok, yes I have used that one in the past, but for re-compiling the whole project, I wanted to create a list of steps to be able to reproducibly compile qt statically. I fugured getting mingw tool chain from source forge to be the "cleanest" option (https://sourceforge.net/projects/mingw-w64/ - v7.3.0)

Otherwise I have to install qt AND download the source from git!? ... do you think that would make a difference?

@kshegunov out of curiosity how did your static configure/build for 5.12.2 differ from what I was doing? (just looking for other ideas)

kshegunov

@code_fodder said in Issue building qt 5.12 from latest git repo:

Otherwise I have to install qt AND download the source from git!? ... do you think that would make a difference?

You can install the source from the installer as well. But I doubt it'd make much of a difference.

@kshegunov out of curiosity how did your static configure/build for 5.12.2 differ from what I was doing? (just looking for other ideas)

I don't build statically. It was not much different, though, I stick to minimalistic builds:

$> git clone git://code.qt.io/qt/qt5.git 5.12
$> cd 5.12
$> git checkout 5.12
$> perl init-repository --module-subset=essential
$> ./configure -developer-build -no-optimize-debug -opensource -confirm-license -nomake examples -nomake tests
$> make -j12

from history. I didn't provide a prefix and did a -developer-build because I wanted to debug a module inside Qt itself. If you want this for application development the appropriate flags for configure are -debug -prefix <some-dir>

code_fodder

@kshegunov I have printed the config summary at the end of my question after where it says: update

code_fodder

Just tried a config like this configure -debug -opensource -confirm-license -nomake examples -nomake tests -static -static-runtime -skip webengine -prefix "C:\install\Qt\5.12.1-static" which more closley matches what @kshegunov mentioned - but I got the same error : (

Note: git log yields (so I am also on 5.12 branch):

* 1c6f272 (HEAD -> 5.12, origin/HEAD, origin/5.12) Update submodules on '5.12' in qt5                                  
* 391ba3a Update submodules on '5.12' in qt5                                                                           
| * ce91433 (origin/dev) Fix failing to disable windows update service                                                 
| * ab43850 Update submodules on 'dev' in qt5                                                                          
| * d926dbe Update submodules on 'dev' in qt5                                                                          
| * 99b46f7 Update submodules on 'dev' in qt5                                                                          
| * 80339a1 Build MIPS64 with b2qt toolchain                                                                           
| * 5cfa563 Provision docker test servers based on Ubuntu 18.04                                                        
| * b4b2152 Start the docker machine and update with new TLS certificates                                              
| * 177df80 Docker Provisioning: Install docker test servers on Windows 10 (x86_64)                                    
| * ab3e348 Display the provisioned version of docker tool kits                                                        
| * b97e448 Move and merge the provisioning scripts of docker to a shared folder                                       
| | * b0afdd4 (origin/5.13) Update submodules on '5.13' in qt5                                                         
| | * 2471d6d (tag: v5.13.0-alpha1) Update qtwebengine                                                                 
| | * 7bd38a4 Update submodules on '5.13' in qt5                                                                       
| | * 26ff9bd Update submodules on '5.13' in qt5                                                                       
| | * 9b84c71 Build MIPS64 with b2qt toolchain                                                                         
| | *   84aa9b7 Merge remote-tracking branch 'origin/dev' into 5.13                                                    
| | |\                                                                                                                 
| | |/                                                                                                                 
| |/|                                                                                                                  
| * | 1830cca Update submodules on 'dev' in qt5

kshegunov

The configure seems okay to me. Very odd. Do you get the same if you don't do a static build?

PS. Also try with forward slashes to exclude some path escaping nonsense. C:/install/Qt/5.12.1-static

code_fodder

@kshegunov I just did this:

rm * -r (I have the linux like commands installed because I prefer them - but its still just a dos prompt)
configure -debug -opensource -confirm-license -nomake examples -nomake tests -skip webengine -prefix "C:/install/Qt/5.12.1-sharedlibs
mingw32-make -j8

Same issue :((

I am going to try exactly what you did! and see...

kshegunov

Just be sure to run git submodule foreach --recursive "git clean -dfx" && git clean -dfx before each configure, to be completely certain there's no *.cache files left over from the previous attempt.

code_fodder

@kshegunov good idea - I will do that.

While I am doing that, did you see this before: https://forum.qt.io/topic/95040/build-qt5-from-git-with-msys2-fails-on-wrong-includes

I just wander if its relevant. But I am not using msys or anything... just wanted to get your thoughts...