[Qt-interest] Minimal Qt/X11 compile

[Thiago Macieira]

On Tuesday 5. October 2010 21.30.06 Konrad Rosenbaum wrote:
> -no-stl ............ Do not compile STL support.
> 
> lose integration between Qt templates with STL templates, does not save
> much space

Not really. You don't lose the integration and it makes no difference in space. 
It does make the build slightly faster since STL headers aren't included.

If you need STL support, just make sure you have a #define QT_STL before 
including Qt headers.

The STL functionality is entirely inline on Unix.

> -no-iconv .......... Do not compile support for iconv(3).
> 
> lose encoding conversion support (UTF-8 and ASCII should still work, any
> other encoding might be lost)

iconv is used only for the "System" encoding, i.e., the locale. If you use -
no-iconv, then QString::fromLocal8Bit and toLocal8Bit may be wrong. (unlikely)

> -reduce-relocations ..... Reduce relocations in the libraries
> 
> may reduce the time to start an app, may also make it a bit less stable
> (it's experimental)

Not experimental, highly recommended, should be default.

> -no-separate-debug-info . Do not store debug information in a separate
> file.
> 
> the inverse of a saver if you build with debug info - the shared object
> files become MUCH bigger; in -release mode you lose the ability to debug Qt

This is the inverse of the Qt 4.2-4.6 behaviour: the debug information is no 
longer split out of the .so file by default. It simply remains where it is.

If you don't want it, you'll have to strip the binaries. There's no loss of 
functionality even in the debugger -- in fact, it may retain some, since there 
are conditions when the separate debug info was wrong.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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