How to find qmake to find QT4

[David Faure]

On Wednesday 22 March 2006 10:24, Thiago Macieira wrote:
> David Faure wrote:
> >Apparently it's so that we can run things like
> >qmake -query QT_INSTALL_HEADERS
> 
> $ qmake -query QT_INSTALL_HEADERS
> /home/tjmaciei/troll/qt-4.1-build/include
> 
> $ pkg-config --variable includedir QtCore
> /home/tjmaciei/troll/qt-4.1-build/include/QtCore
> 
> $ pkg-config --cflags QtCore
> -DQT_SHARED -I/home/tjmaciei/troll/qt-4.1-build/include -I/home/tjmaciei/troll/qt-4.1-build/include/QtCore
> 
> I can understand that it helps when pkg-config isn't installed, but I 
> believe that we will need pkg-config for other stuff too... So why not 
> use it, since it gives you more information?

For me it doesn't.

$ qmake -query QT_INSTALL_HEADERS
/devel/kde/src/4/qt-copy/include

$ pkg-config --variable includedir QtCore

$ pkg-config --cflags QtCore
Package QtCore was not found in the pkg-config search path.
Perhaps you should add the directory containing `QtCore.pc'
to the PKG_CONFIG_PATH environment variable
No package 'QtCore' found

/devel/kde/src/4/qt-copy/lib/QtCore.pc exists, but I would have to modify
PKG_CONFIG_PATH to see it. Setting PATH and LD_LIBRARY_PATH seems
very natural to me, it's what anyone always does in order to use something that
is in its own prefix. Setting PKG_CONFIG_PATH isn't so natural (especially
since the variable is empty here, and should it really point to a lib directory...?)

-- 
David Faure, faure at kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).