COMP: ExternalProject - Rename python variables with a slicer independent name

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22718 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Set (tcl|tk)_LIBRARY variable into tcl external project

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22719 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Set vtk PNG library variables into VTK external project

See #1739

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22720 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: ExternalProject - Rename zlib variables with slicer independent name

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22721 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: ExternalProject - Introduce convenience macro "slicer_include_once()"

See #1739

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22722 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: ExternalProject - Simplify and document Teem external project

Teem version >= 1.10 is now explicitly required.

See #1739

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22723 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Support Slicer_USE_SYSTEM_* option. Fixes #1739

This commit implements four main changes:

  (1) it updates Slicer build system to support configuring Slicer passing
      Slicer_USE_SYSTEM_* CMake variables

  (2) it updates to a newer version of CTK able to understand CTK_USE_SYSTEM_*
      options. List of CTK contribution associated with this update are
      reported below.

  (3) it changes curl library from "slicerlibcurl/cmcurl/curl" v7.12.1
      to the more recent official CMake'ified curl v7.33.0. This has the
      benefit of making it easier to build against the corresponding
      system library.

  (4) It implements workaround allowing some CLIs to built on Debian-like
      distribution that is providing DCMTK 3.6.0.
      See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637687
      EMSegment project has also been updated to implement a similar
      workaround.

The macro "SlicerMacroCheckExternalProjectDependency" allowing to
recursively traverse the external project dependency tree has been
updated.

The traversal is now done in two passes. The first pass traverses the
complete tree to set the value of Slicer_USE_SYSTEM_*.

The second pass invokes the "ExternalProject_Add" function and displays
informative messages. In addition to the usual "[OK]" and "[INCLUDED]"
suffixes, an additional text "(SYSTEM)" is displayed. It means the
corresponding libraries (and headers) installed on the system will be
used.

On Ubuntu 13.10, support for the following options have been
tested simultaneously:
  -DSlicer_USE_PYTHONQT_WITH_OPENSSL:BOOL=ON
  -DSlicer_USE_SYSTEM_python:BOOL=ON
  -DSlicer_USE_SYSTEM_DCMTK:BOOL=ON
  -DSlicer_USE_SYSTEM_LibArchive:BOOL=ON
  -DSlicer_USE_SYSTEM_curl:BOOL=ON
  -DSlicer_USE_SYSTEM_teem:BOOL=ON
  -DSlicer_USE_SYSTEM_OpenIGTLink:BOOL=ON
  -DSlicer_USE_SYSTEM_OpenSSL:BOOL=ON # Implicitly set because python depends
                                      # on OpenSSL.
  -DSlicer_BUILD_OpenIGTLinkIF:BOOL=OFF # Only openigtlink version1 are available
                                        # and code does NOT supports only v2.

To successfully build Slicer against system libraries, the corresponding
packages have been installed:
  sudo apt-get install libssl-dev \
    libdcmtk-dev \
    libarchive-dev \
    libpython2.7-dev \
    python-numpy \
    libcurl4-openssl-dev \
    libteem-dev \
    tk-dev \
    tcl-dev \
    itcl3-dev \
    libopenigtlink1-dev

While not tested, support for the following option has also been
implemented:
  -DSlicer_USE_SYSTEM_ITKv4:BOOL=ON
  -DSlicer_USE_SYSTEM_VTK:BOOL=ON

CTK updates:

$ git shortlog  91cdf9e0f...02ecc27d0

Jean-Christophe Fillion-Robin (39):
      Ensure CTK_INSTALL_QTPLUGIN_DIR is properly set
      Ensure "CMAKE_INSTALL_PREFIX" is properly passed to inner project.
      By default, do not install application headers
      Install CTK's *.cmake files
      Merge branch '65-packaging-support' into 403-relocatable-ctkconfig-usectk
      Set plugin install rules for target and include files
      Remove commented code and unused vars from CTKConfig / CTKGenerateCTKConfig
      Explicitly set default value for CTK_INSTALL_QTPLUGIN_DIR
      Remove explicit setting of CMake policies.
      Improve FindDCMTK.cmake documentation
      Add DCMTK 3.6.0 support to ctkDICOMUtil.cpp
      Ensure DCMTK libraries can be found on system without setting DCMTK_DIR
      FindDCMTK - Workaround bug in packaging of DCMTK 3.6.0 on Debian.
      Add support for install-able and relocatable package.
      Merge branch '382-fix-find-dcmtk-issue'
      Merge branch '403-relocatable-ctkconfig-usectk'
      Merge branch '405-support-dcmtk-360'
      Fix -Wunused-but-set-variable in transfer function tests
      Merge branch '209-fix-vtk-transfer-function-test-warnings'
      Fix linking of VTKCoreCppTest by adding a check for linker capabilities
      Merge branch 'fix-vtk-core-test-link-error'
      COMP: FindDCMTK - Exclude -D from DCMTK_DEFINITIONS for easier re-use
      Merge branch '382-fix-find-dcmtk-issue'
      Associate DCMTK_DEFINITIONS to CTKDICOMCore
      Merge branch '413-associated-dcmtk-definitions-to-ctkdicomcore'
      Merge pull request #410 from NifTK/409-widgets-on-ctkPopupWidget-do-not-get-keyboard-focus
      Add DCMTK 3.6.0 support to CTK application.
      Merge branch '405-support-dcmtk-360'
      Fix configuration of CTKConfig based on DCMTK_HAVE_CONFIG_H_OPTIONAL value
      Merge branch '413-associated-dcmtk-definitions-to-ctkdicomcore'
      Add convenience function "ctk_list_to_string"
      Automatically reformat list passed to "CTK" inner build.
      COMP: Add support for CTK_USE_SYSTEM_* options
      Merge branch '418-support-use-system-option'
      FindDCMTK - Do not explicitly set DCMTK_DEFINITIONS
      FindDCMTK - Clean white spaces
      Merge branch '382-fix-find-dcmtk-issue' into 413-associated-dcmtk-definitions-to-ctkdicomcore
      Associate CTKDICOMCore with DCMTK_DEFINITIONS in build and install tree
      Merge branch '413-associated-dcmtk-definitions-to-ctkdicomcore'

Miklos Espak (1):
      Active window flag transferred on RequestSoftwareInputPanel event

Steve Pieper (2):
      Put all tags for a given instance into a list for a single batch insert
      Merge pull request #415 from pieper/414-batch-insert-tags

See #1739

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22724 3bd1e089-480b-0410-8dfb-8563597acbee