[Insight-users] [ITK Community] About some basic problems and doubts

Fri Feb 14 11:09:30 EST 2014

Hi,

During uninstalling I tried sudo make uninstall. However at that time it
did not work out and gave the error as "there is no target `uninstall` to
make".  I am looking into your other points. Thanks a lot for your help.

On Fri, Feb 14, 2014 at 8:42 PM, Brian Helba <brian.helba at kitware.com>wrote:

> Hi Ujjwal,
>
> To be clear, when you say that you "installed" ITK / VTK, I'm assuming
> that you mean that after running "make", you ran "make install" (or more
> probably "sudo make install").
>
> If this is the case, then the installation copied the built ITK/VTK
> libraries, header files, CMake configuration, etc. to standard locations on
> your system. Typically, you can run "[sudo] make uninstall" from your build
> directory to then delete these files, but since you already deleted the
> build directory, you'll have to remove them manually. I don't have the full
> list of install paths in front of me at the moment, but if you can't find
> the files yourself, feel free to make a follow-up post (including what
> Linux distribution you're using), and I or someone else will try and post
> them for you. Assuming that ITK / VTK follow the FHS [1], "/usr/local" is
> probably a good place to start looking.
>
> This is the reason why your new programs are still pointing to the old
> version of ITK: it is still installed and is being located before the new
> version. By requiring version 4.5, you are forcing CMake to continue the
> search even after it finds 4.4.
>
> --
>
> As for OpenCV, if you don't need to use it for any of your programs, I
> would recommend just configuring and building ITK with
> Module_ITKOpenCVBridge disabled.
>
> --
>
> Finally, note that installing ITK / VTK is not really necessary most of
> the time. You can simply build ITK / VTK somewhere in your home directory,
> and then manually add the "ITK_DIR" or "VTK_DIR" CMake configuration
> variable to any of your own projects that have the "find_package(ITK ...)"
> / "find_package(VTK ...)" line in their CMakeLists.txt. Set the value of
> "ITK_DIR" / "VTK_DIR" to be the path to the directory of your ITK / VTK
> build.
>
> Despite having to manually add the extra CMake variable when first
> configuring a new project (although even this can be automated with
> environment variables), this is sometimes more convenient overall, as you
> can rebuild ITK / VTK with new options any time, without having to
> reinstall it (which requires root privledges) and there is no uninstall
> step to worry about if you no longer need ITK / VTK or want to make a fresh
> build.
>
> [1] http://www.pathname.com/fhs/
>
> Hope this helps,
> Brian
>
>
>
> On Fri, Feb 14, 2014 at 9:22 AM, UJJWAL aryan <meetukme at gmail.com> wrote:
>
>> Hi,
>>
>> I installed VTK-6.1.0 and ITK-4.5 on my system (Ubuntu 13.04) . Before
>> that, ITK-4.4 and VTK-5.10 were installed on my system.
>>  In order to remove them, I simply removed the build folders from which I
>> had run cmake during their installation (this method of removal was
>> suggested to me in the mailing list a long time back).
>>
>> After I installed ITK-4.5 and VTK-6.1.0, I faced the following issues :
>>
>>  When trying to compile a trivial ITK test program, it failed to link
>> because
>>  find_package(ITK REQUIRED) was still pointing to UseITK.cmake file
>> correspondin g to ITK-4.4 and not ITK-4.5. Finally in order to solve it, I
>> wrote find_package(ITK 4.5 REQUIRED)
>> My first question is :
>>   1. Why did it continue pointing to ITK-4.4 ? What is the correct way to
>> remove previous versions of libraries so that all their traces are gone and
>> there are no such conflicting links ?
>>
>> 2.  Even after solving this problem, it fails to link because it cannot
>> find any opencv libraries.  I compiled ITK with support for
>> ITKOPencvBridge. However in the test code, I have not used anything even
>> remotely concerned with OpenCV. Even in my CMakeLists.txt file, I have not
>> called Opencv at all. Then why is it trying to link to Opencv  ?
>> Why is it not able to find those libraries when they are in
>> usr/local/lib/opencv and /usr/local/lib/opencv2 ? About this, on further
>> probing I found that  opencv.pc file is present in pkg-config folder which
>> describes the package opencv perfectly.
>> Running Opencv test programs showed that OpenCv is installed properly.
>>
>> 3. How do I detect any traces of old and unused and unnecessary library
>> files left in my system and remove them without disturbing the rest of the
>> system ?
>>
>>
>> It might be that some of my questions are too basic or trivial. But I am
>> not an expert in Linux and any help and patient support  would be deeply
>> appreciated
>>
>> --
>> Ujjwal
>>
>>
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>>
>
>
> --
> Brian Helba
> Medical Imaging
> Kitware, Inc.
>

-- 
Ujjwal
IIIT Hyderabad
Mob - 8142265628
ujjwal at research.iiit.ac.in
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