[Interest] 32bits builds on 64bits Linux platform

[Jean-Michaël Celerier]

I'd say that the simplest is to spin up a 32-bit docker image corresponding
to your OS and do the build on it.



-------
Jean-Michaël Celerier
http://www.jcelerier.name

On Sat, Aug 26, 2017 at 10:03 AM, Christian Gagneraud <chgans at gmail.com>
wrote:

> On 26 August 2017 at 14:27, Oliver Niebuhr
> <googleersatz at oliverniebuhr.de> wrote:
> > Am 26.08.2017 um 03:26 schrieb Christian Gagneraud:
> >> Hi there,
> >>
> >> I have an application that requires a 32 bits version of Qt-5.6 and
> >> fixing the 32 vs 64 bits issues of this app is not option at this
> >> stage.
> >>
> >> So I need to build Qt-6.6 in 32 bits mode on a 64 bits Linux platfrom,
> >> and then i need to build and run my 32 bits app on the same 64 bits
> >> Linux platform against this 32 bits Qt-5.6.
> >>
> >> Is it possible to to build 32 bits Qt on 64 bits platform? Has anyone
> >> manage to do that? Any advice, tips or tricks to share?
> >>
> >> Thanks in advance,
> >> Chris
> >> _______________________________________________
> >> Interest mailing list
> >> Interest at qt-project.org
> >> http://lists.qt-project.org/mailman/listinfo/interest
> >>
> >
> > Good Morning.
>
> Good evening,
>
> > Yes it is possible. To build 32-Bit Binaries and Libs on a 64-Bit OS,
> > you must install the "Multilib" Version of the Compiler and the used
> > Dev-Packages. So in example for the GCC Compiler (G++): Remove the "GCC"
> > Package and replace it with "GCC-Multilib" (at least this is the Name
> > under Antergos Linux (Arch based). Not sure about other Distros. My main
> > OS is still Windows so I am still kind-a noob when it comes to Linux
> > Development :)
> >
> > Some 32-Bit Libraries (or Package Names to be more precise) are named
> > like "lib32-example1". Others like "example2-multilib". Depending on the
> > Library itself and your Distribution.
> >
> > You propably need to activate the Multilib Repository for your
> > Distribution first, if you dont have any 32-Bit Stuff installed yet.
> >
> > Qt Configure Parameter for the GCC / G++ Compiler:
> > The important Configure Parameter for you (so that Qt tells the
> > Compiler to build 32-Bit Binaries etc.) is:
> > "/your/qt56/sourcefolder/configure -platform linux-g++-32"
> >
> > No Idea about other Distros or Compiler like LLVM/Clang.
>
> Thanks for sharing, i'm running Ubuntu, so it's a bit different. But
> yes, one need the multilib stuff and then intall the Qt dependencies
> in 32 mode....
>
> Chris
>
> >
> > Good Luck :)
> >
> > Greetings
> > Oliver
> > _______________________________________________
> > Interest mailing list
> > Interest at qt-project.org
> > http://lists.qt-project.org/mailman/listinfo/interest
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
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