Boost.Build/bjam and Qt

Question

I'm trying to set up a Boost.Build .jamroot file for compiling a Qt 4.8 project, but it seems to be ignoring the.ui files and the .cpp files that should be moc:ed. I tried poking around inside qt4.jam, adding some more ECHO:s, but I'm not sure where to look.

It seems that the run method of uic-generator doesn't get called (init does), for example, but I think it should be.

My jamroot file looks something like this:

import qt4 ;
if ! [ qt4.initialized ]
{
    ECHO "oh nooo" ;
}
import cast ;

exe application :
    # For example
    [ cast _ moccable-cpp : ./src/something.cpp ] 
    [ glob-tree *.ui  : .svn ] 
    ;

The only output I get is:

>bjam
warn: Unable to construct ./application
...found 1 target...

If I run bjam --debug-configuration, qt4.jam prints out all the correct paths for my Qt installation.

What's up? Maybe it's incompatible with Qt 4.8? Or am I just using it wrong? Although the code is almost verbatim taken from the files under examples/qt.

How can I use it? Thanks for any help.

Edit: Using gcc 4.7 with the MinGW distro 9.0 from http://nuwen.net/mingw.html, and the Boost.Build that comes with Boost 1.49.0.

Venal

I've seen Qt applications build with bjam Version 3.1.11 and Qt 4.7. I'd be very surprised if it were impossible with bjam Version 3.1.19 (from Boost 1.49.0) and Qt 4.8. Unfortunately, I don't really understand much of the Jam language myself. – Tinsmith

Answer 1

replace ./src/something.cpp to ./src/something.hpp, i.e.:

[ cast _ moccable-cpp : ./src/something.hpp ]

bjam 's qt-examples tend to misunderstanding: main.cpp module mix up source and header files.

Let's remember moc process header files usually (files with Q_OBJECT 's class declaration(s): in most cases source files doesn't contain its)

Lintel

Answer 2

Not an exact answer to your question but a suggestions: What about using qmake ? It is also suitable for normal c++ builds. If you use a lot of Qt, qmake is pretty handy, although the documentation could be improved.

See

http://labs.qt.nokia.com/2008/04/16/the-power-of-qmake/

http://doc.qt.nokia.com/4.4/qmake-manual.html

http://www.qtcentre.org/wiki/index.php?title=Undocumented_qmake

http://paulf.free.fr/undocumented_qmake.html

http://www.kde.gr.jp/~ichi/qt/qmake-manual-6.html

for further references

Claustrophobia