KDevelop and Qt4

[jacek]

Another option is just to add -lQt3Support to the external libraries in your project.

What about #ifdef QT3_SUPPORT? There's a lot of them in Qt headers.

[high_flyer]

What about #ifdef QT3_SUPPORT? There's a lot of them in Qt headers.

I am not syre what do you mean with that.
You need to link against the Qt3 support lib if you want to use the Qt3 support classes...
How do you want to uese the #ifdef for that? with adding dynamic linking in the code?
Its possible, but lots of work... much easier just to add a -l to the libs list...

[jacek]

much easier just to add a -l to the libs list...

But adding -lQt3Support to LIBS is not enough.

For example lets take QString header:

...
#ifdef QT3_SUPPORT
    inline QT3_SUPPORT const char *ascii() const { return ascii_helper(); }
    inline QT3_SUPPORT const char *latin1() const { return latin1_helper(); }
...

...
#ifdef QT3_SUPPORT
    inline QT3_SUPPORT const char *ascii() const { return ascii_helper(); }
    inline QT3_SUPPORT const char *latin1() const { return latin1_helper(); }
...

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Without QT3_SUPPORT defined, compiler won't see those methods.

QT += something does more than LIBS += -lsometing.

[high_flyer]

oh, now I see what you meant...
One sould ofcourse add the QT3_SUPPORT define to the make parameters under "build options->defines"

[glocker50]

Hello,

I am using Suse 10 with KDevelop 3.3.1 and Qt 4. I can compile my app and run it fine but unfortunately I lost the ability to debug it with breakpoints since I integrated Qt :-( I found a post on the web with the exact same problem and description (see below), but unfortunately no answer... I use CONFIG += qt debug thread warn_on and in the generated Makefile I set -g and -O0.

It works on my system (Kdevelop 3.3.4 and Qt 4.1.4). In the .pro file, i have :
QT = core gui debug
CONFIG += debug warn_on
Don't forget to clean the project, recompile it and run in debugger mode. If you modify settings in qmake manager it does not recompile by default.

Cedric.