[CMake] Problem with cmake & qt - out of source build - relative paths

[Emre Turkay]

Hi folks,
I have the following directory structure:

./Application
./Application/GUI.ui
./Application/GUI.cpp
./Application/GUI.qrc
./Application/GUI.h
./test
./test/gui
./test/gui/main.cpp
./test/gui/CMakeLists.txt

and creating a build directory under ./test/gui which I run cmake as "cmake
..".

There are two problems I am facing with;

1. When I run cmake it creates a directory; test/Application, which
shouldn't create I suppose.
2. When I run make it gives an error and exits;

$ make
[ 14%] Generating ui_GUI.h
File '/home/emre/tmp/cmake_qt/Application/GUI.h' is not valid
make[2]: *** [ui_GUI.h] Error 1
make[1]: *** [CMakeFiles/test_im_gui.dir/all] Error 2
make: *** [all] Error 2
$ _

Here is my CMakeLists.txt file (which I copied from a tutorial found on the
web):

=====================================================================
CMAKE_MINIMUM_REQUIRED(VERSION 2.6)

# Set project's name
PROJECT(sample)

# with SET() command you can change variables or define new ones
# here we define SAMPLE_SRCS variable that contains a list of
# all .cpp files
# note that we don't need \ at the end of line
SET(SAMPLE_SRCS
    main.cpp
    ../../Application/GUI.cpp
)

# another list, this time it includes all header files that should be
treated
# with moc
SET(SAMPLE_MOC_HDRS
    ../../Application/GUI.h
)

# some .ui files
SET(SAMPLE_UIS
    ../../Application/GUI.ui
)

# and finally a resource file
SET(SAMPLE_RCS
    ../../Application/GUI.qrc
)

# enable warnings
ADD_DEFINITIONS(-Wall)

# this command finds Qt4 libraries and sets all required variables
# note that it's Qt4, not QT4 or qt4
FIND_PACKAGE(Qt4 REQUIRED)

# add some useful macros and variables
# (QT_USE_FILE is a variable defined by FIND_PACKAGE(Qt4) that contains a
path
# to CMake script)
INCLUDE (${QT_USE_FILE})

# this command will generate rules that will run rcc on all files from
# SAMPLE_RCS in result SAMPLE_RC_SRCS variable will contain paths
# to files produced by rcc
QT4_ADD_RESOURCES(SAMPLE_RC_SRCS ${SAMPLE_RCS})

# this will run uic on .ui files
QT4_WRAP_UI(SAMPLE_UI_HDRS ${SAMPLE_MOC_HDRS})

# and finally this will run moc
QT4_WRAP_CPP(SAMPLE_MOC_SRCS ${SAMPLE_MOC_HDRS})

# we need this to be able to include headers produced by uic in our code
# (CMAKE_BINARY_DIR holds a path to the build directory, while
# INCLUDE_DIRECTORIES() wordks just like INCLUDEPATH from qmake)
INCLUDE_DIRECTORIES( ${CMAKE_BINARY_DIR} )

# here we instruct CMake to build "sample" executable from all of the
# source files
ADD_EXECUTABLE(sample ${SAMPLE_SRCS} ${SAMPLE_MOC_SRCS}
                           ${SAMPLE_RC_SRCS} ${SAMPLE_UI_HDRS})

# last thing we have to do is to tell CMake what libraries our executable
needs,
# luckily FIND_PACKAGE prepared QT_LIBRARIES variable for us
TARGET_LINK_LIBRARIES(sample ${QT_LIBRARIES})
=====================================================================

Platform information:

OS: Ubuntu 8.10
cmake version 2.6-patch 0

I'm also attaching a test case to create the problem.

What am I doing wrong and how can I make it compile?

Any help is appreciated.

Thanks,

emre
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