[Cmake] problems with build order

[Landshark]

Hello,

I'm trying to port my current Qt-based C++ project from QMake to CMake
and have run into a snag or two.

My project is laid out like this:

/root-src
	CMakeLists.txt
	file1.cpp
	file1.h
	file2.cpp
	file2.h
	file3.cpp
	file3_needs_moc.h
	/swig-wrappers
		CMakeLists.txt
		file1.i
		file2.i
	/ui
		CMakeLists.txt
		ui1.ui

So there are 2 sub-directories.  I have the root-src CMakeLists.txt
setup and it appears to moc and compile those files just fine.

I also have swig-wrappers and ui listed with the SUBDIRS() command.

However, 2 different operations have to occur in swig-wrappers and ui. 
In swig-wrappers, I have created custom commands to execute swig to
generate wrappers from the interface files and produce a .cpp file. 
This is listed as a file in the root-src CMakeLists.txt.

In the ui directory, I have used the ADD_LIBRARY() command to add the
libraries and QT_WRAP_UI is used to convert the .ui files to .h and
.cxx.

The problem is that the main directory is built before the
subdirectories (eg: root-src is built before swig-wrappers and ui).

Some of the files in root-src depend on the resulting files from the ui
and swig-wrappers subdirectories.

I've tried adding dependencies on the executable to the ui library, but
this doesn't change the build order.

This is sort of a confusing mail, I apologize.  But I really like the
CMake build system and would love to convert my project over to it.

If needed, I can post the CMakeLists.txt files.

-dave