[Development] Cross compiling Qt 5

[Loaden]

I prefer use qbs instead of qmake.
qbs is a great build suite.

2012/8/19 Peter Kümmel <syntheticpp at gmx.net>

> Qt could be compiled native or cross for a system
> different to the system on which Qt is build.
>
> But this is not how mkspecs/ is organized:
>
> linux-*        native
> win32-*        native
> wince*         cross
> unsupported/*  cross and native
> device/*       cross
>
> also configure supports different options:
>   -xplatform
>   -device
>   -device-options
>   -sysroot
>
> In short, it is a mess.
>
>
> Couldn't we cleanup this by only having native specs
> in 'mkspecs' and cross specs in 'mkspecs/target'.
>
> A more configure like option would be 'target',
> not 'xplatform' or 'device':
>
> http://airs.com/ian/configure/configure_5.html
>    When building cross compilation tools,
>    there are two different systems involved:
>    the system on which the tools will run,
>    and the system for which the tools generate code.
>    - The system on which the tools will run is called the host system.
>    - The system for which the tools generate code is called the target
> system.
>
> Therefore I propose to cleanup this before the 5.0 release.
>
>
> AFAIK host != "system on which configure runs" is not supported by Qt,
> so we only need 'target' based options.
>
> We need at least these two options:
>   1. specify mkspec name
>   2. specify toolchain prefix
>
> maybe also (
> http://labs.qt.nokia.com/2012/04/13/cross-compiling-qt-for-the-masses/ )
>   3. sysroot
>   4. additional options
>
>
> Here a proposal:
>   1. -target-mkspec  : specify mkspec name
>   2. -target         : specify toolchain prefix
>   3. isn't sysroot specified by the toolchain compiler?
>   4. not needed
>
>
> Or are we already in the "wait for 5 + N mode"?
>
> Peter
>
>
>
>
>
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-- 
Best Regards
Yuchen
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