[CMake] adding a link directory

[Liam Kurmos]

thanks Rolf, but no joy.

i must have done something else wrong. Is there a way to make cmake
output the link command?

i get undefined link errors (as below). when i made a simple test of
linking these with a gcc command everything worked using the
-L/absPath/

libtourtre definitely provides the undefined functions.

errors:

CMakeFiles/testOVAS.dir/Volume4D.cpp.o: In function
`Volume4D::testContourTree()':
Volume4D.cpp:(.text+0xad5): undefined reference to `ct_init(unsigned
long, unsigned long*, double (*)(unsigned long, void*), unsigned long
(*)(unsigned long, unsigned long*, void*), void*)'
Volume4D.cpp:(.text+0xaeb): undefined reference to
`ct_sweepAndMerge(ctContext*)'
Volume4D.cpp:(.text+0xafa): undefined reference to `ct_decompose(ctContext*)'
Volume4D.cpp:(.text+0xb10): undefined reference to `ct_branchMap(ctContext*)'
Volume4D.cpp:(.text+0xb26): undefined reference to `ct_cleanup(ctContext*)'
collect2: ld returned 1 exit status
make[2]: *** [testOVAS] Error 1
make[1]: *** [CMakeFiles/testOVAS.dir/all] Error 2
make: *** [all] Error 2


my cmake file looks like this:

PROJECT (OVAS)
cmake_minimum_required(VERSION 2.6)

FIND_PACKAGE(VXL)


FIND_PACKAGE(VTK REQUIRED)
IF(NOT VTK_USE_RENDERING)
  MESSAGE(FATAL_ERROR "Example ${PROJECT_NAME} requires VTK_USE_RENDERING.")
ENDIF(NOT VTK_USE_RENDERING)
INCLUDE(${VTK_USE_FILE})


include_directories (${VAS_SOURCE_DIR} "/usr/local/include/vxl/core/"
"/usr/local/include/vxl/vcl/"
"/home/zoizoi/psyforge/woven/libtourtre_v15/libtourtre/include")


ADD_EXECUTABLE(testOVAS testOVAS.cpp Analyser4D.cpp
abstractFeature.cpp  Feature.cpp ImplicitVolume4D.cpp
Analyser3D.cpp GeoPoint.cpp StepToParamConverter.cpp
       GeoSequence.cpp GeoSphere.cpp    Volume4D.cpp MetaballsVol4D
FeatureWeights.cpp ViewEvaluator.cpp testVol4D.cpp OVASControl.cpp
FrameBuffer.cpp TemporalChangeFeature.cpp arraytools.h AreaFeature.cpp
InfoSheet.cpp InfoData.cpp FlyingSaucersVol4D.cpp PathVisualiser.cpp
TemporalChangeFeature2.cpp MovingAAElipsoid.cpp Data.cpp Mesh.cpp
)


FIND_LIBRARY(TOURTRE_LIBRARY tourtre
/home/zoizoi/psyforge/woven/libtourtre_v15/libtourtre)
TARGET_LINK_LIBRARIES(testOVAS vtkWidgets vtkRendering vtkHybrid vnl
libtourtre.so ${TOURTRE_LIBRARY})

thanks for the help,

Liam