[digiKam-users] The future of 6.0.0 bundles and C++11 support...

[Gilles Caulier]

Hi all,

Good news here. I finally found an extra centos 6 32 bits repository
providing devtoolset-4 with a more recent G++ 5.x compiler.

All compile fine and the pre release digiKam 6.0.0 AppImage 32 bits will be
online in one hour at usual place...

Best

Gilles Caulier

2018-03-31 11:25 GMT+02:00 Gilles Caulier <caulier.gilles at gmail.com>:

> Hi all and happy Easter...
>
> Since 5.9.0 release, there is not yet an update of 6.0.0 pre-release
> bundles build periodically (on my computer).
>
> There is no technical problem with it for the moment, but later, i'm sure
> there we comes...
>
> That the state of bundles compilation :
>
> -1/ AppImage 64 bits : virtualbox + Centos 6.9
> -2/ AppImage 32 bits : virtualbox + Centos 6.9
> -3/ Apple PKG installer : virtualbox + MacOS Yosemite
> -4/ Windows installer 64 bits : Linux Mageia6 + MXE cross-compiler.
> -5/ Windows installer 32 bits : Linux Mageia6 + MXE cross-compiler.
>
> 1/, 4/, 5/ are not a problem. The GCC compiler is enough recent.
>
> For 2/, it typically not solvable as CentOs 6 32 bits is frozen to GCC
> 4.7.x.
>
> For 3/, an update to a more recent MacOS / Xcode is required. I will
> certainly drop the virtualbox and use my MacBook pro instead. But i will
> lost a big door to the facility to compile the installer without to use an
> Apple device. If i want to install a more recent MacOS version as stand
> alone, i need to look again and again in dark web to found a good solution
> working with virtualbox.
>
> Now the question about C++11 support : why it's problematic...
>
> 1/ more and more code based on C++11 come inside DK. it's not very
> important as the base code do not use to much recent C++ syntax, but step
> by step the code will be rewritten in this way. This is not a problem for
> the moment, as all compile fine everywhere, but this will change in the
> future i'm sure.
>
> 2/ KDE::KF5 framework : The last release of KF5 libraries will switch
> progressively to C++11 and lost compatibility with older compilers.
> Currently, all bundles are branched to an old KF5 release, and for 6.0.0, i
> would to update these libraries of course.
>
> 3/ Qt5 framework : with 5.10 and later 5.11, it's clear that older
> compilers support will be dropped. For ex, MacOS Yosemite is not supported
> since Qt 5.9.0 release. So Qt 5.8.0 is currently used to compile PKG
> installer...
>
> 4/ Exiv2 : the developers want to switch implementation to C++11 for next
> 0.27, as i can read in Github forum. So the time is counted here too...
>
> So, we can conclude like this for 6.0.0 plan :
>
> 1/ drop 32 bits support with Linux AppImage.
> 2/ if we need to be homogeneous, we must drop 32 bits support with Windows
> installer.
> 3/ concentrate the work in 6.0.0 to update 64 bits AppImage, PKG, and
> Windows bundles with last code everywhere, including C++11 support.
> 4/ This want mean : no more 32 bundles with incoming 6.0.0 releases.
>
> I hope to be clear here, and not to introduce complex technical points. I
> would to read users feedback for the lack of support of 32 bits bundles.
>
> Thanks in advance.
>
> Gilles Caulier
>
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