diff --git a/cmake/CheckCmakeCompat.cmake b/cmake/CheckCmakeCompat.cmake
index 6b9f9cc12..d616ad7dd 100644
--- a/cmake/CheckCmakeCompat.cmake
+++ b/cmake/CheckCmakeCompat.cmake
@@ -23,6 +23,7 @@ macro(enable_cmake_compat CMVERSION)
 endmacro()
 
 # Compatibility includes - order does matter!
+enable_cmake_compat(3.7.0)
 enable_cmake_compat(2.8.11)
 enable_cmake_compat(2.8.6)
 enable_cmake_compat(2.8.3)
diff --git a/cmake/compat_3.7.0/FindICU.cmake b/cmake/compat_3.7.0/FindICU.cmake
new file mode 100644
index 000000000..82b557b26
--- /dev/null
+++ b/cmake/compat_3.7.0/FindICU.cmake
@@ -0,0 +1,349 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#.rst:
+# FindICU
+# -------
+#
+# Find the International Components for Unicode (ICU) libraries and
+# programs.
+#
+# This module supports multiple components.
+# Components can include any of: ``data``, ``i18n``, ``io``, ``le``,
+# ``lx``, ``test``, ``tu`` and ``uc``.
+#
+# Note that on Windows ``data`` is named ``dt`` and ``i18n`` is named
+# ``in``; any of the names may be used, and the appropriate
+# platform-specific library name will be automatically selected.
+#
+# This module reports information about the ICU installation in
+# several variables.  General variables::
+#
+#   ICU_VERSION - ICU release version
+#   ICU_FOUND - true if the main programs and libraries were found
+#   ICU_LIBRARIES - component libraries to be linked
+#   ICU_INCLUDE_DIRS - the directories containing the ICU headers
+#
+# Imported targets::
+#
+#   ICU::<C>
+#
+# Where ``<C>`` is the name of an ICU component, for example
+# ``ICU::i18n``.
+#
+# ICU programs are reported in::
+#
+#   ICU_GENCNVAL_EXECUTABLE - path to gencnval executable
+#   ICU_ICUINFO_EXECUTABLE - path to icuinfo executable
+#   ICU_GENBRK_EXECUTABLE - path to genbrk executable
+#   ICU_ICU-CONFIG_EXECUTABLE - path to icu-config executable
+#   ICU_GENRB_EXECUTABLE - path to genrb executable
+#   ICU_GENDICT_EXECUTABLE - path to gendict executable
+#   ICU_DERB_EXECUTABLE - path to derb executable
+#   ICU_PKGDATA_EXECUTABLE - path to pkgdata executable
+#   ICU_UCONV_EXECUTABLE - path to uconv executable
+#   ICU_GENCFU_EXECUTABLE - path to gencfu executable
+#   ICU_MAKECONV_EXECUTABLE - path to makeconv executable
+#   ICU_GENNORM2_EXECUTABLE - path to gennorm2 executable
+#   ICU_GENCCODE_EXECUTABLE - path to genccode executable
+#   ICU_GENSPREP_EXECUTABLE - path to gensprep executable
+#   ICU_ICUPKG_EXECUTABLE - path to icupkg executable
+#   ICU_GENCMN_EXECUTABLE - path to gencmn executable
+#
+# ICU component libraries are reported in::
+#
+#   ICU_<C>_FOUND - ON if component was found
+#   ICU_<C>_LIBRARIES - libraries for component
+#
+# Note that ``<C>`` is the uppercased name of the component.
+#
+# This module reads hints about search results from::
+#
+#   ICU_ROOT - the root of the ICU installation
+#
+# The environment variable ``ICU_ROOT`` may also be used; the
+# ICU_ROOT variable takes precedence.
+#
+# The following cache variables may also be set::
+#
+#   ICU_<P>_EXECUTABLE - the path to executable <P>
+#   ICU_INCLUDE_DIR - the directory containing the ICU headers
+#   ICU_<C>_LIBRARY - the library for component <C>
+#
+# .. note::
+#
+#   In most cases none of the above variables will require setting,
+#   unless multiple ICU versions are available and a specific version
+#   is required.
+#
+# Other variables one may set to control this module are::
+#
+#   ICU_DEBUG - Set to ON to enable debug output from FindICU.
+
+# Written by Roger Leigh <rleigh@codelibre.net>
+
+set(icu_programs
+  gencnval
+  icuinfo
+  genbrk
+  icu-config
+  genrb
+  gendict
+  derb
+  pkgdata
+  uconv
+  gencfu
+  makeconv
+  gennorm2
+  genccode
+  gensprep
+  icupkg
+  gencmn)
+
+# The ICU checks are contained in a function due to the large number
+# of temporary variables needed.
+function(_ICU_FIND)
+  # Set up search paths, taking compiler into account.  Search ICU_ROOT,
+  # with ICU_ROOT in the environment as a fallback if unset.
+  if(ICU_ROOT)
+    list(APPEND icu_roots "${ICU_ROOT}")
+  else()
+    if(NOT "$ENV{ICU_ROOT}" STREQUAL "")
+      file(TO_CMAKE_PATH "$ENV{ICU_ROOT}" NATIVE_PATH)
+      list(APPEND icu_roots "${NATIVE_PATH}")
+      set(ICU_ROOT "${NATIVE_PATH}"
+          CACHE PATH "Location of the ICU installation" FORCE)
+    endif()
+  endif()
+
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # 64-bit binary directory
+    set(_bin64 "bin64")
+    # 64-bit library directory
+    set(_lib64 "lib64")
+  endif()
+
+  # Generic 64-bit and 32-bit directories
+  list(APPEND icu_binary_suffixes "${_bin64}" "bin")
+  list(APPEND icu_library_suffixes "${_lib64}" "lib")
+
+  # Find all ICU programs
+  foreach(program ${icu_programs})
+    string(TOUPPER "${program}" program_upcase)
+    set(cache_var "ICU_${program_upcase}_EXECUTABLE")
+    set(program_var "ICU_${program_upcase}_EXECUTABLE")
+    find_program("${cache_var}" "${program}"
+      HINTS ${icu_roots}
+      PATH_SUFFIXES ${icu_binary_suffixes}
+      DOC "ICU ${program} executable")
+    mark_as_advanced(cache_var)
+    set("${program_var}" "${${cache_var}}" PARENT_SCOPE)
+  endforeach()
+
+  # Find include directory
+  find_path(ICU_INCLUDE_DIR
+            NAMES "unicode/utypes.h"
+            HINTS ${icu_roots}
+            PATH_SUFFIXES ${icu_include_suffixes}
+            DOC "ICU include directory")
+  set(ICU_INCLUDE_DIR "${ICU_INCLUDE_DIR}" PARENT_SCOPE)
+
+  # Get version
+  if(ICU_INCLUDE_DIR AND EXISTS "${ICU_INCLUDE_DIR}/unicode/uvernum.h")
+    file(STRINGS "${ICU_INCLUDE_DIR}/unicode/uvernum.h" icu_header_str
+      REGEX "^#define[\t ]+U_ICU_VERSION[\t ]+\".*\".*")
+
+    string(REGEX REPLACE "^#define[\t ]+U_ICU_VERSION[\t ]+\"([^ \\n]*)\".*"
+      "\\1" icu_version_string "${icu_header_str}")
+    set(ICU_VERSION "${icu_version_string}" PARENT_SCOPE)
+    unset(icu_header_str)
+    unset(icu_version_string)
+  endif()
+
+  # Find all ICU libraries
+  set(ICU_REQUIRED_LIBS_FOUND ON)
+  foreach(component ${ICU_FIND_COMPONENTS})
+    string(TOUPPER "${component}" component_upcase)
+    set(component_cache "ICU_${component_upcase}_LIBRARY")
+    set(component_cache_release "${component_cache}_RELEASE")
+    set(component_cache_debug "${component_cache}_DEBUG")
+    set(component_found "${component_upcase}_FOUND")
+    set(component_libnames "icu${component}")
+    set(component_debug_libnames "icu${component}d")
+
+    # Special case deliberate library naming mismatches between Unix
+    # and Windows builds
+    unset(component_libnames)
+    unset(component_debug_libnames)
+    list(APPEND component_libnames "icu${component}")
+    list(APPEND component_debug_libnames "icu${component}d")
+    if(component STREQUAL "data")
+      list(APPEND component_libnames "icudt")
+      # Note there is no debug variant at present
+      list(APPEND component_debug_libnames "icudtd")
+    endif()
+    if(component STREQUAL "dt")
+      list(APPEND component_libnames "icudata")
+      # Note there is no debug variant at present
+      list(APPEND component_debug_libnames "icudatad")
+    endif()
+    if(component STREQUAL "i18n")
+      list(APPEND component_libnames "icuin")
+      list(APPEND component_debug_libnames "icuind")
+    endif()
+    if(component STREQUAL "in")
+      list(APPEND component_libnames "icui18n")
+      list(APPEND component_debug_libnames "icui18nd")
+    endif()
+
+    find_library("${component_cache_release}" ${component_libnames}
+      HINTS ${icu_roots}
+      PATH_SUFFIXES ${icu_library_suffixes}
+      DOC "ICU ${component} library (release)")
+    find_library("${component_cache_debug}" ${component_debug_libnames}
+      HINTS ${icu_roots}
+      PATH_SUFFIXES ${icu_library_suffixes}
+      DOC "ICU ${component} library (debug)")
+    include(SelectLibraryConfigurations)
+    select_library_configurations(ICU_${component_upcase})
+    mark_as_advanced("${component_cache_release}" "${component_cache_debug}")
+    if(${component_cache})
+      set("${component_found}" ON)
+      list(APPEND ICU_LIBRARY "${${component_cache}}")
+    endif()
+    mark_as_advanced("${component_found}")
+    set("${component_cache}" "${${component_cache}}" PARENT_SCOPE)
+    set("${component_found}" "${${component_found}}" PARENT_SCOPE)
+    if(${component_found})
+      if (ICU_FIND_REQUIRED_${component})
+        list(APPEND ICU_LIBS_FOUND "${component} (required)")
+      else()
+        list(APPEND ICU_LIBS_FOUND "${component} (optional)")
+      endif()
+    else()
+      if (ICU_FIND_REQUIRED_${component})
+        set(ICU_REQUIRED_LIBS_FOUND OFF)
+        list(APPEND ICU_LIBS_NOTFOUND "${component} (required)")
+      else()
+        list(APPEND ICU_LIBS_NOTFOUND "${component} (optional)")
+      endif()
+    endif()
+  endforeach()
+  set(_ICU_REQUIRED_LIBS_FOUND "${ICU_REQUIRED_LIBS_FOUND}" PARENT_SCOPE)
+  set(ICU_LIBRARY "${ICU_LIBRARY}" PARENT_SCOPE)
+
+  if(NOT ICU_FIND_QUIETLY)
+    if(ICU_LIBS_FOUND)
+      message(STATUS "Found the following ICU libraries:")
+      foreach(found ${ICU_LIBS_FOUND})
+        message(STATUS "  ${found}")
+      endforeach()
+    endif()
+    if(ICU_LIBS_NOTFOUND)
+      message(STATUS "The following ICU libraries were not found:")
+      foreach(notfound ${ICU_LIBS_NOTFOUND})
+        message(STATUS "  ${notfound}")
+      endforeach()
+    endif()
+  endif()
+
+  if(ICU_DEBUG)
+    message(STATUS "--------FindICU.cmake search debug--------")
+    message(STATUS "ICU binary path search order: ${icu_roots}")
+    message(STATUS "ICU include path search order: ${icu_roots}")
+    message(STATUS "ICU library path search order: ${icu_roots}")
+    message(STATUS "----------------")
+  endif()
+endfunction()
+
+_ICU_FIND()
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(ICU
+                                  FOUND_VAR ICU_FOUND
+                                  REQUIRED_VARS ICU_INCLUDE_DIR
+                                                ICU_LIBRARY
+                                                _ICU_REQUIRED_LIBS_FOUND
+                                  VERSION_VAR ICU_VERSION
+                                  FAIL_MESSAGE "Failed to find all ICU components")
+
+unset(_ICU_REQUIRED_LIBS_FOUND)
+
+if(ICU_FOUND)
+  set(ICU_INCLUDE_DIRS "${ICU_INCLUDE_DIR}")
+  set(ICU_LIBRARIES "${ICU_LIBRARY}")
+  foreach(_ICU_component ${ICU_FIND_COMPONENTS})
+    string(TOUPPER "${_ICU_component}" _ICU_component_upcase)
+    set(_ICU_component_cache "ICU_${_ICU_component_upcase}_LIBRARY")
+    set(_ICU_component_cache_release "ICU_${_ICU_component_upcase}_LIBRARY_RELEASE")
+    set(_ICU_component_cache_debug "ICU_${_ICU_component_upcase}_LIBRARY_DEBUG")
+    set(_ICU_component_lib "ICU_${_ICU_component_upcase}_LIBRARIES")
+    set(_ICU_component_found "${_ICU_component_upcase}_FOUND")
+    set(_ICU_imported_target "ICU::${_ICU_component}")
+    if(${_ICU_component_found})
+      set("${_ICU_component_lib}" "${${_ICU_component_cache}}")
+      if(NOT TARGET ${_ICU_imported_target})
+        add_library(${_ICU_imported_target} UNKNOWN IMPORTED)
+        if(ICU_INCLUDE_DIR)
+          set_target_properties(${_ICU_imported_target} PROPERTIES
+            INTERFACE_INCLUDE_DIRECTORIES "${ICU_INCLUDE_DIR}")
+        endif()
+        if(EXISTS "${${_ICU_component_cache}}")
+          set_target_properties(${_ICU_imported_target} PROPERTIES
+            IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+            IMPORTED_LOCATION "${${_ICU_component_cache}}")
+        endif()
+        if(EXISTS "${${_ICU_component_cache_release}}")
+          set_property(TARGET ${_ICU_imported_target} APPEND PROPERTY
+            IMPORTED_CONFIGURATIONS RELEASE)
+          set_target_properties(${_ICU_imported_target} PROPERTIES
+            IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "CXX"
+            IMPORTED_LOCATION_RELEASE "${${_ICU_component_cache_release}}")
+        endif()
+        if(EXISTS "${${_ICU_component_cache_debug}}")
+          set_property(TARGET ${_ICU_imported_target} APPEND PROPERTY
+            IMPORTED_CONFIGURATIONS DEBUG)
+          set_target_properties(${_ICU_imported_target} PROPERTIES
+            IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "CXX"
+            IMPORTED_LOCATION_DEBUG "${${_ICU_component_cache_debug}}")
+        endif()
+      endif()
+    endif()
+    unset(_ICU_component_upcase)
+    unset(_ICU_component_cache)
+    unset(_ICU_component_lib)
+    unset(_ICU_component_found)
+    unset(_ICU_imported_target)
+  endforeach()
+endif()
+
+if(ICU_DEBUG)
+  message(STATUS "--------FindICU.cmake results debug--------")
+  message(STATUS "ICU found: ${ICU_FOUND}")
+  message(STATUS "ICU_VERSION number: ${ICU_VERSION}")
+  message(STATUS "ICU_ROOT directory: ${ICU_ROOT}")
+  message(STATUS "ICU_INCLUDE_DIR directory: ${ICU_INCLUDE_DIR}")
+  message(STATUS "ICU_LIBRARIES: ${ICU_LIBRARIES}")
+
+  foreach(program IN LISTS icu_programs)
+    string(TOUPPER "${program}" program_upcase)
+    set(program_lib "ICU_${program_upcase}_EXECUTABLE")
+    message(STATUS "${program} program: ${${program_lib}}")
+    unset(program_upcase)
+    unset(program_lib)
+  endforeach()
+
+  foreach(component IN LISTS ICU_FIND_COMPONENTS)
+    string(TOUPPER "${component}" component_upcase)
+    set(component_lib "ICU_${component_upcase}_LIBRARIES")
+    set(component_found "${component_upcase}_FOUND")
+    message(STATUS "${component} library found: ${${component_found}}")
+    message(STATUS "${component} library: ${${component_lib}}")
+    unset(component_upcase)
+    unset(component_lib)
+    unset(component_found)
+  endforeach()
+  message(STATUS "----------------")
+endif()
+
+unset(icu_programs)