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diff --git a/share/cmake-3.18/Modules/CheckLibraryExists.cmake b/share/cmake-3.18/Modules/CheckLibraryExists.cmake
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+++ b/share/cmake-3.18/Modules/CheckLibraryExists.cmake
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+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+CheckLibraryExists
+------------------
+
+Check if the function exists.
+
+.. command:: CHECK_LIBRARY_EXISTS
+
+  .. code-block:: cmake
+
+    CHECK_LIBRARY_EXISTS(LIBRARY FUNCTION LOCATION VARIABLE)
+
+  ::
+
+    LIBRARY  - the name of the library you are looking for
+    FUNCTION - the name of the function
+    LOCATION - location where the library should be found
+    VARIABLE - variable to store the result
+               Will be created as an internal cache variable.
+
+
+
+The following variables may be set before calling this macro to modify
+the way the check is run:
+
+::
+
+  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+  CMAKE_REQUIRED_LINK_OPTIONS = list of options to pass to link command
+  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+  CMAKE_REQUIRED_QUIET = execute quietly without messages
+#]=======================================================================]
+
+include_guard(GLOBAL)
+
+macro(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE)
+  if(NOT DEFINED "${VARIABLE}")
+    set(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION
+      "-DCHECK_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}")
+    if(NOT CMAKE_REQUIRED_QUIET)
+      message(CHECK_START "Looking for ${FUNCTION} in ${LIBRARY}")
+    endif()
+    set(CHECK_LIBRARY_EXISTS_LINK_OPTIONS)
+    if(CMAKE_REQUIRED_LINK_OPTIONS)
+      set(CHECK_LIBRARY_EXISTS_LINK_OPTIONS
+        LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS})
+    endif()
+    set(CHECK_LIBRARY_EXISTS_LIBRARIES ${LIBRARY})
+    if(CMAKE_REQUIRED_LIBRARIES)
+      set(CHECK_LIBRARY_EXISTS_LIBRARIES
+        ${CHECK_LIBRARY_EXISTS_LIBRARIES} ${CMAKE_REQUIRED_LIBRARIES})
+    endif()
+
+    if(CMAKE_C_COMPILER_LOADED)
+      set(_cle_source ${CMAKE_ROOT}/Modules/CheckFunctionExists.c)
+    elseif(CMAKE_CXX_COMPILER_LOADED)
+      set(_cle_source ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckLibraryExists/CheckFunctionExists.cxx)
+      configure_file(${CMAKE_ROOT}/Modules/CheckFunctionExists.c "${_cle_source}" COPYONLY)
+    else()
+      message(FATAL_ERROR "CHECK_FUNCTION_EXISTS needs either C or CXX language enabled")
+    endif()
+
+    try_compile(${VARIABLE}
+      ${CMAKE_BINARY_DIR}
+      ${_cle_source}
+      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+      ${CHECK_LIBRARY_EXISTS_LINK_OPTIONS}
+      LINK_LIBRARIES ${CHECK_LIBRARY_EXISTS_LIBRARIES}
+      CMAKE_FLAGS
+      -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_LIBRARY_EXISTS_DEFINITION}
+      -DLINK_DIRECTORIES:STRING=${LOCATION}
+      OUTPUT_VARIABLE OUTPUT)
+    unset(_cle_source)
+
+    if(${VARIABLE})
+      if(NOT CMAKE_REQUIRED_QUIET)
+        message(CHECK_PASS "found")
+      endif()
+      set(${VARIABLE} 1 CACHE INTERNAL "Have library ${LIBRARY}")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+        "Determining if the function ${FUNCTION} exists in the ${LIBRARY} "
+        "passed with the following output:\n"
+        "${OUTPUT}\n\n")
+    else()
+      if(NOT CMAKE_REQUIRED_QUIET)
+        message(CHECK_FAIL "not found")
+      endif()
+      set(${VARIABLE} "" CACHE INTERNAL "Have library ${LIBRARY}")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+        "Determining if the function ${FUNCTION} exists in the ${LIBRARY} "
+        "failed with the following output:\n"
+        "${OUTPUT}\n\n")
+    endif()
+  endif()
+endmacro()