[ITK-dev] installed ITK cannot be moved due to absolute path

[Rashad Kanavath]

On Tue, May 10, 2016 at 10:50 PM, Dženan Zukić <dzenanz at gmail.com> wrote:

> Hi Rashad,
>
> a few months ago relative paths were completely removed from CMake,
> because they were never fully implemented. Have you followed
> recommendations from here <https://itk.org/Wiki/ITK/Cross_Compiling> for
> cross-compiling?
>

Yes. indeed. I had updated the mxe/src/itk.mk for several versions of ITK!

Regarding relative path in cmake, I don't understand.  I didn't use cmake
specific REL_PATH.

>
> As for integrating your changes into ITK, you should submit a patch
> following the instructions here <https://itk.org/Wiki/ITK/Git/Develop>.
> If your changes don't break anything, they are likely to be integrated.
>

issue here is a bit different. For all libitk* stuff the story ends well.
For thirdparties, zlib, expat etc.. it is good idea to put the full path
because we don't know if they are in same install directory as ITK or not.
But this make the installed cmake modules non-portable even to a different
location on the same disk.

Now if anyone want to provide a distributable setup of ITK. patch the
generated cmake files with sed and then copy it. This is what I am doing
right now!
A simple not perfect solution is to have all thirdparties make
<LIBRARY>_PREFIX variable inside the ITKConfig.cmake

and for each library we use <LIBRARY>_PREFIX/include and
<LIBRARY>_PREFIX/lib


Another option is to avoid full path directly inside cmake module files and
put find_package() calls in the install tree.

As these files are autogenerated by cmake, don't know what is possible.






> Regards,
> Dženan
>
> On Mon, May 9, 2016 at 4:27 PM, Rashad Kanavath <
> mohammedrashadkm at gmail.com> wrote:
>
>> Hello all,
>>
>> I have some issue when copying ITK install directory to a different
>> system. I agree this is not usual and may not appear on a linux distro or
>> windows.
>>
>> My requirement is bit different. I cross-compile ITK and then use the
>> binaries on Windows. Using dll and headers are fine. But the installed
>> cmake files are a problem. They have absolute path in
>> ITK-4.8/Modules/*.cmake files. It is not in all .cmake files even though I
>> put a wildcard there..
>>
>> For a easy and quick workaround. I rely on mighty sed command to insert
>> something into installed cmake file.
>>
>> For example see this;
>> lib/cmake/ITK-4.8/ITKTargets-release.cmake
>>
>> set(CMAKE_IMPORT_FILE_VERSION 1)
>> set(LIB_INSTALL_PREFIX)
>> get_filename_component(CURRENT_FILE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
>> get_filename_component(LIB_INSTALL_PREFIX "${CURRENT_FILE_DIR}" PATH)
>> get_filename_component(LIB_INSTALL_PREFIX "${LIB_INSTALL_PREFIX}" PATH)
>> get_filename_component(LIB_INSTALL_PREFIX "${LIB_INSTALL_PREFIX}" PATH)
>>
>> and at last:
>>
>> $(SED) -i 's,$(PREFIX)/$(TARGET),\${LIB_INSTALL_PREFIX},g'
>> 'lib/cmake/ITK-$(ITK_VER)/ITKTargets-release.cmake'
>>
>> I would like to have this patch inside the other .cmake files in the
>> installation and avoid the sed commands during post-installation
>>
>> Here is the list of cmake files that needs this change.
>> lib/cmake/ITK-4.8/ITKTargets-release.cmake
>> lib/cmake/ITK-4.8/Modules/ITKZLIB.cmake
>> lib/cmake/ITK-4.8/Modules/ITKExpat.cmake
>> lib/cmake/ITK-4.8/Modules/ITKHDF5.cmake
>> lib/cmake/ITK-4.8/Modules/ITKJPEG.cmake
>> lib/cmake/ITK-4.8/Modules/ITKTIFF.cmake
>> lib/cmake/ITK-4.8/Modules/ITKPNG.cmake
>>
>> So is it possible to make the change into future version of ITK?
>>
>> The major issue here is those cmake files are generated by cmake. Is
>> there a way cmake could use relative path ?
>>
>>
>> --
>> Regards,
>>    Rashad
>>
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>


-- 
Regards,
   Rashad
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