[solved] QXmpp - problem with undefined reference to

[never_ever]

Hi,
I try to use qxmpp library in my project (I don't want static linking), but while building there are some problems with this library: "undefined reference to...".
I'm not sure if I do everything properly.
I build qmpp library using Qt Creator as it was wrote in readme file.
And I get build-qxmpp folder with builded library. Next I write:
@
INCLUDEPATH +=-L./build-qxmpp/src
LIBS += qxmpp/src/base
qxmpp/src/client
qxmpp/src/server
@

And when I start to build my project the problem shows up.

I saw common topic on forum, but there were advices to static linking, that I don't want to.
Could you explain me where I do something wrong? Maybe I link wrong or my project is builded wrong.

If you need any information please ask, I wish to solve this problem quick :D

[SGaist]

Hi,

First thing I can see you have mixed these two statements:
INCLUDEPATH is where you give the path to the headers
LIBS is where you give the path to the libraries you link to and the libs themselves e.g.

@LIBS += -Lpath_to_your_library -llibraryname_without_the_lib_prefix@

[never_ever]

Sorry, wrong rewrite (I'm little bit tired)
Of course I have:
@
LIBS +=-L./build-qxmpp/src
INCLUDEPATH += qxmpp/src/base
qxmpp/src/client
qxmpp/src/server

@

[SGaist]

You are still missing the -l with the library name

[never_ever]

Ok, now I hav also -lqxmpp0
But know it shows
"cannot find -lqxmpp0"

[SGaist]

probably because:

@-L./build-qxmpp/src@

doesn't point to the right place. As a quick fix, give the full path to the folder containing the lib. You can then later add some logic to get it from the build dir.

[never_ever]

I gave the full path to the library, but now it says:
" cannot find C:... : Permission denied".
But this folder exist, so I do not know why it cannot find it.

[never_ever]

Ok, Now it works with full path to the library. Everything because of using forward slash instead of backslash. I checked it and instead of writing:

@-Lbuild-qxmpp/src@
I use:
@-Lbuild-qxmpp\src@

Thanks for help :D

[never_ever]

I'm doing everything too fast. I have one more problem
When I build/re-build project it works with:
@-Lbuild-qxmpp\src@
But when I compile it, it doesn't work with it, it works only if I use full path
This is very strange.

[SGaist]

That's strange. Qt uses unix style forward slashes everywhere so it should work out of the box. Do you have spaces in your path ?

build-qxmpp/src is a relative path. So depending on where the rest of your code is compiled, it can't be found at linking time