Problem while compiling Qt App.

I'm using Qt creator and I started a brand new project using file->new->qt4 gui application, and when I hit the compile button, I get this error:

/usr/bin/ld: cannot find -lgobject-2.0
collect2: ld returned 1 exit status

I haven't made any changes to the code. All I did was make a new project and hit the compile button.

I'm not sure what distro you're using but some have separate devel packages.
you might need to see if gobject and gobject-devel are installed (the names might be slightly different depending on the distro)
or you might check your LD_LIBRARY_PATH variable includes the right paths

Missing 'lgobject-2.0' means that
/usr/lib/libgobject-2.0.so is missing.

'libgobject-2.0.so' is from the package
libglib2.0_0-devel, glib2-devel, libglib2.0-dev :
Different Linux ... different package name.

When a lib is asked for by configuring or
compiling : l<name> = lib<name>.so , which
is always provided by the '-devel' version of
the library in question.
.....

Did you install Qt4 from a package manager or from the source (You did install Qt4 didn't you)? If you got it from a package manager then it should have ensured that all the necessary development libraries are also installed, and so that may mean that you have an issue with your path to the libraries.

Originally Posted by knudfl When a lib is asked for by configuring or compiling : l<name> = lib<name>.so , which is always provided by the '-devel' version of the library in question. .....

.so files are required for the package to run, hence they usually don't go into -devel packages. -devel stuff packages usually contain header and source files that are needed when compiling, but are not needed to run the final binary.

Note that the error issued above is not from the compiler either, but from the linker (ld). Since the binaries are linked after being compiled, I think that the -devel stuff must be in place. Otherwise he wouldn't be reaching the linking stage at all.

scarypajamas, if the library (.so) file has been installed manually or using a non-standard package into a non-standard location you might need to pass the path to the library to kdevelop. Don't ask me how, it should be configured in some place on the project properties or wherever.

With gcc in command line you would use -L for that.

You might need also to add the path to your LD_LIBRARY_PATH variable if it isn't already there to be able to run the binary file, unless you link it statically.

I had the same problem. I think it is just a "silly" with some distros.
Install package "glib2-devel", and it should work fine.
This is what happens:
- Package libgobject_2-0 actually contains /usr/lib/libgobject-2.0.so. However this is not enough, you also need a file called /usr/lib/libgobject-2.0.a.
- This libgobject-2.0.a file is actually contained in package "glib2-devel", for some obscure reason.
Good luck, do let us know if it worked!