diff --git a/CMakeExternals/ITK-4.7.1-gcc-5.patch b/CMakeExternals/ITK-4.7.1-gcc-5.patch
new file mode 100644
index 0000000000..3a1a4d6886
--- /dev/null
+++ b/CMakeExternals/ITK-4.7.1-gcc-5.patch
@@ -0,0 +1,45 @@
+diff -rupN original/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_preprocessor.cxx patch/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_preprocessor.cxx
+--- original/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_preprocessor.cxx	2015-05-01 02:28:32.000000000 +0200
++++ patch/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_preprocessor.cxx	2015-05-04 09:39:09.865493336 +0200
+@@ -101,6 +101,15 @@ int test_preprocessor_main(int /*argc*/,
+   ++minor_count;
+ #endif
+ 
++#ifdef VCL_GCC_5
++  ++major_count;
++#endif
++#ifdef VCL_GCC_50
++  ++minor_count;
++#endif
++#ifdef VCL_GCC_51
++  ++minor_count;
++#endif
+ 
+ #ifdef VCL_VC
+   ++compiler_count;
+diff -rupN original/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h patch/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h
+--- original/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h	2015-05-01 02:28:32.000000000 +0200
++++ patch/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h	2015-05-04 09:42:18.201517519 +0200
+@@ -126,6 +126,13 @@
+ #  else
+ #   define VCL_GCC_40
+ #  endif
++# elif (__GNUC__==5)
++#  define VCL_GCC_5
++#  if (__GNUC_MINOR__ > 0 )
++#   define VCL_GCC_51
++#  else
++#   define VCL_GCC_50
++#  endif
+ # else
+ #  error "Dunno about this gcc"
+ # endif
+@@ -245,7 +252,7 @@
+ 
+ // This *needs* to come after vcl_config_headers.h
+ #if defined(__GNUC__) && !defined(__INTEL_COMPILER)
+-# if defined(VCL_GCC_3) || defined(VCL_GCC_4)
++# if defined(VCL_GCC_3) || defined(VCL_GCC_4) || defined(VCL_GCC_5)
+ #  define GNU_LIBSTDCXX_V3 1
+ # elif !defined(GNU_LIBSTDCXX_V3) && defined(VCL_GCC_295) && VCL_CXX_HAS_HEADER_ISTREAM
+ // One difference between v2 and v3 is that the former has
diff --git a/CMakeExternals/ITK.cmake b/CMakeExternals/ITK.cmake
index f0b5cde7ba..5fd15cac6b 100644
--- a/CMakeExternals/ITK.cmake
+++ b/CMakeExternals/ITK.cmake
@@ -1,92 +1,101 @@
 #-----------------------------------------------------------------------------
 # ITK
 #-----------------------------------------------------------------------------
 
 # Sanity checks
 if(DEFINED ITK_DIR AND NOT EXISTS ${ITK_DIR})
   message(FATAL_ERROR "ITK_DIR variable is defined but corresponds to non-existing directory")
 endif()
 
 set(proj ITK)
 set(proj_DEPENDENCIES GDCM)
 
 if(MITK_USE_OpenCV)
   list(APPEND proj_DEPENDENCIES OpenCV)
 endif()
 
 if(MITK_USE_HDF5)
   list(APPEND proj_DEPENDENCIES HDF5)
 endif()
 
 set(ITK_DEPENDS ${proj})
 
 if(NOT DEFINED ITK_DIR)
 
   set(additional_cmake_args )
   if(MINGW)
     set(additional_cmake_args
         -DCMAKE_USE_WIN32_THREADS:BOOL=ON
         -DCMAKE_USE_PTHREADS:BOOL=OFF)
   endif()
 
   list(APPEND additional_cmake_args
        -DUSE_WRAP_ITK:BOOL=OFF
       )
 
   if(MITK_USE_OpenCV)
     list(APPEND additional_cmake_args
          -DModule_ITKVideoBridgeOpenCV:BOOL=ON
          -DOpenCV_DIR:PATH=${OpenCV_DIR}
         )
   endif()
 
   # Keep the behaviour of ITK 4.3 which by default turned on ITK Review
   # see MITK bug #17338
   list(APPEND additional_cmake_args
     -DModule_ITKReview:BOOL=ON
   # for 4.7, the OpenJPEG is needed by review but the variable must be set
     -DModule_ITKOpenJPEG:BOOL=ON
   )
 
   if(CTEST_USE_LAUNCHERS)
     list(APPEND additional_cmake_args
       "-DCMAKE_PROJECT_${proj}_INCLUDE:FILEPATH=${CMAKE_ROOT}/Modules/CTestUseLaunchers.cmake"
     )
   endif()
 
   set(vcl_constexpr_patch)
   if(GCC_VERSION VERSION_LESS 4.8 AND GCC_VERSION VERSION_GREATER 4)
     set(vcl_constexpr_patch
       COMMAND ${PATCH_COMMAND} -N -p1 -i ${CMAKE_CURRENT_LIST_DIR}/ITK-4.7.1-gcc-4.6.patch
     )
   endif()
 
+  # this will be in ITK 4.8, see https://issues.itk.org/jira/browse/ITK-3361
+  set(vcl_gcc5_patch)
+  if(GCC_VERSION VERSION_GREATER 4)
+    set(vcl_gcc5_patch
+      COMMAND ${PATCH_COMMAND} -N -p1 -i ${CMAKE_CURRENT_LIST_DIR}/ITK-4.7.1-gcc-5.patch
+    )
+  endif()
+
   ExternalProject_Add(${proj}
      LIST_SEPARATOR ${sep}
      URL ${MITK_THIRDPARTY_DOWNLOAD_PREFIX_URL}/InsightToolkit-4.7.1-20c0592.tar.gz
      URL_MD5 f778a5f0e297c06dc629c33ec45733dc
      # work with external GDCM
      PATCH_COMMAND ${PATCH_COMMAND} -N -p1 -i ${CMAKE_CURRENT_LIST_DIR}/ITK-4.7.1.patch
                    ${vcl_constexpr_patch}
+                   ${vcl_gcc5_patch}
      CMAKE_GENERATOR ${gen}
      CMAKE_ARGS
        ${ep_common_args}
        ${additional_cmake_args}
        -DBUILD_EXAMPLES:BOOL=OFF
        -DITK_USE_SYSTEM_GDCM:BOOL=ON
        -DGDCM_DIR:PATH=${GDCM_DIR}
      CMAKE_CACHE_ARGS
        ${ep_common_cache_args}
      CMAKE_CACHE_DEFAULT_ARGS
        ${ep_common_cache_default_args}
      DEPENDS ${proj_DEPENDENCIES}
     )
 
   set(ITK_DIR ${ep_prefix})
   mitkFunctionInstallExternalCMakeProject(${proj})
 
 else()
 
   mitkMacroEmptyExternalProject(${proj} "${proj_DEPENDENCIES}")
 
 endif()