1 files changed, 49 insertions, 0 deletions
diff --git a/share/cmake-3.10/Modules/CMakeDependentOption.cmake b/share/cmake-3.10/Modules/CMakeDependentOption.cmake
new file mode 100644
index 0000000..21d3c96
--- /dev/null
+++ b/share/cmake-3.10/Modules/CMakeDependentOption.cmake
@@ -0,0 +1,49 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#.rst:
+# CMakeDependentOption
+# --------------------
+#
+# Macro to provide an option dependent on other options.
+#
+# This macro presents an option to the user only if a set of other
+# conditions are true.  When the option is not presented a default value
+# is used, but any value set by the user is preserved for when the
+# option is presented again.  Example invocation:
+#
+# ::
+#
+#   CMAKE_DEPENDENT_OPTION(USE_FOO "Use Foo" ON
+#                          "USE_BAR;NOT USE_ZOT" OFF)
+#
+# If USE_BAR is true and USE_ZOT is false, this provides an option
+# called USE_FOO that defaults to ON.  Otherwise, it sets USE_FOO to
+# OFF.  If the status of USE_BAR or USE_ZOT ever changes, any value for
+# the USE_FOO option is saved so that when the option is re-enabled it
+# retains its old value.
+
+macro(CMAKE_DEPENDENT_OPTION option doc default depends force)
+  if(${option}_ISSET MATCHES "^${option}_ISSET$")
+    set(${option}_AVAILABLE 1)
+    foreach(d ${depends})
+      string(REGEX REPLACE " +" ";" CMAKE_DEPENDENT_OPTION_DEP "${d}")
+      if(${CMAKE_DEPENDENT_OPTION_DEP})
+      else()
+        set(${option}_AVAILABLE 0)
+      endif()
+    endforeach()
+    if(${option}_AVAILABLE)
+      option(${option} "${doc}" "${default}")
+      set(${option} "${${option}}" CACHE BOOL "${doc}" FORCE)
+    else()
+      if(${option} MATCHES "^${option}$")
+      else()
+        set(${option} "${${option}}" CACHE INTERNAL "${doc}")
+      endif()
+      set(${option} ${force})
+    endif()
+  else()
+    set(${option} "${${option}_ISSET}")
+  endif()
+endmacro()