[CMake] libxml2

[Pau Garcia i Quiles]

Quoting Charlene Tsai <tsaicharlene at gmail.com>:

> Hi,
>
> Could some please show me the proper way to handle libxml2 on Gentoo
> linux. In my CMakeLists.txt, if I include the following line it works
> on windows and some versions of linux:
>
>   TARGET_LINK_LIBRARIES( my_exe ITKCommon ITKIO libxml2)
>
> However, when trying to compile on Gentoo linux (using gcc 4.1.2) it
> complains about not being able to find libxml2.so for linking, unless
> I change it to:
>
> TARGET_LINK_LIBRARIES( my_exe ITKCommon ITKIO xml2)
>
> Any advice is appreciated.

You should really read about how libraries and finders work in CMake.  
There is a good amount of information in the wiki and the  
Documentation section of the website.

For libxml2, this is what you need:

FIND_PACKAGE(LibXml2)
TARGET_LINK_LIBRARIES( my_exe ITKCommon ITKIO ${LIBXML2_LIBRARIES} )

As you are using ITK, your CMakeLists.txt should look like this:

FIND_PACKAGE(ITK REQUIRED)
IF(ITK_FOUND)
   INCLUDE(ITK_USE_FILE)
ENDIF(ITK_FOUND)
FIND_PACKAGE(LibXml2 REQUIRED)
...
TARGET_LINK_LIBRARIES( my_exe ITKCommon ITKIO ${LIBXML2_LIBRARIES} )

-- 
Pau Garcia i Quiles
http://www.elpauer.org
(Due to my workload, I may need 10 days to answer)