Merge pull request #15843 from protocolbuffers/cp-cmake

Cherry-pick fixes to install.cmake to escape regex special characters

cmake/install.cmake

@@ -78,10 +78,12 @@ foreach(_header ${protobuf_HEADERS})
  elseif (_find_nosrc GREATER -1)
  set(_from_dir "${protobuf_SOURCE_DIR}")
  endif()
+ # Escape _from_dir for regex special characters in the directory name.
+ string(REGEX REPLACE "([$^.[|*+?()]|])" "\\\\\\1" _from_dir_regexp "${_from_dir}")
  # On some platforms `_form_dir` ends up being just "protobuf", which can
  # easily match multiple times in our paths. We force it to only replace
  # prefixes to avoid this case.
- string(REGEX REPLACE "^${_from_dir}" "" _header ${_header})
+ string(REGEX REPLACE "^${_from_dir_regexp}" "" _header ${_header})
  get_filename_component(_extract_from "${_from_dir}/${_header}" ABSOLUTE)
  get_filename_component(_extract_name ${_header} NAME)
  get_filename_component(_extract_to "${CMAKE_INSTALL_INCLUDEDIR}/${_header}" DIRECTORY)