Info for packagers:

At a minimum you should consider the following cmake options:

CMAKE_SKIP_RPATH:BOOL=YES
CMAKE_INSTALL_PREFIX:PATH=/usr
GDCM_BUILD_APPLICATIONS:BOOL=ON
GDCM_BUILD_SHARED_LIBS:BOOL=ON
GDCM_DOCUMENTATION:BOOL=ON

You should really consider:
GDCM_BUILD_TESTING:BOOL=OFF
Otherwise it build extra code only needed to run the unit test of gdcm... 

unless you have some specific compiler optimization technique you should use the cmake default one:
CMAKE_BUILD_TYPE:STRING=Release

By default this will build pdf doc if you have all the required package, if you do not want the pdf:
GDCM_PDF_DOCUMENTATION:BOOL=ON

Wrapping:
GDCM support the following wrapped language
GDCM_WRAP_PYTHON:BOOL=ON
GDCM_WRAP_CSHARP:BOOL=ON
GDCM_WRAP_JAVA:BOOL=ON

For VTK user:
GDCM_USE_VTK:BOOL=ON

System libs:
- By default gdcm ships with system libs for ease of compilation on win32 system. So for most *nix system you may want:
GDCM_USE_SYSTEM_EXPAT:BOOL=ON
GDCM_USE_SYSTEM_ZLIB:BOOL=ON
GDCM_USE_SYSTEM_UUID:BOOL=ON
GDCM_USE_SYSTEM_OPENJPEG:BOOL=ON

Examples:
GDCM comes with some examples for user, but setting the following:
GDCM_BUILD_EXAMPLES:BOOL=ON
will not do anything since there is no install rule for examples...

