FindLZMA: add imported targets

CMake/FindLZMA.cmake

+find_path(LZMA_INCLUDE_DIR
+  NAMES lzma.h
+  DOC "lzma include directory")
+find_library(LZMA_LIBRARY
+  NAMES lzma
+  DOC "lzma library")
 
-find_library(LZMA_LIBRARIES NAMES lzma)
-find_path(LZMA_INCLUDE_DIRS NAMES lzma.h)
+if (LZMA_INCLUDE_DIR)
+  file(STRINGS "${LZMA_INCLUDE_DIR}/lzma/version.h" _lzma_version_lines
+    REGEX "#define[ \t]+LZMA_VERSION_(MAJOR|MINOR|PATCH)")
+  string(REGEX REPLACE ".*LZMA_VERSION_MAJOR *\([0-9]*\).*" "\\1" _lzma_version_major "${_lzma_version_lines}")
+  string(REGEX REPLACE ".*LZMA_VERSION_MINOR *\([0-9]*\).*" "\\1" _lzma_version_minor "${_lzma_version_lines}")
+  string(REGEX REPLACE ".*LZMA_VERSION_PATCH *\([0-9]*\).*" "\\1" _lzma_version_patch "${_lzma_version_lines}")
+  set(LZMA_VERSION "${_lzma_version_major}.${_lzma_version_minor}.${_lzma_version_patch}")
+  unset(_lzma_version_major)
+  unset(_lzma_version_minor)
+  unset(_lzma_version_patch)
+  unset(_lzma_version_lines)
+endif ()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(LZMA
-  DEFAULT_MSG
-  LZMA_LIBRARIES
-  LZMA_INCLUDE_DIRS)
+  REQUIRED_VARS LZMA_LIBRARY LZMA_INCLUDE_DIR
+  VERSION_VAR LZMA_VERSION)
+
+if (LZMA_FOUND)
+  set(LZMA_LIBRARIES "${LZMA_LIBRARY}")
+  set(LZMA_INCLUDE_DIRS "${LZMA_INCLUDE_DIR}")
+
+  if (NOT TARGET LZMA::LZMA)
+    include(vtkDetectLibraryType)
+    vtk_detect_library_type(lzma_library_type
+      PATH "${LZMA_LIBRARY}")
+    add_library(LZMA::LZMA "${lzma_library_type}" IMPORTED)
+    unset(lzma_library_type)
+    set_target_properties(LZMA::LZMA PROPERTIES
+      IMPORTED_LOCATION "${LZMA_LIBRARY}"
+      INTERFACE_INCLUDE_DIRECTORIES "${LZMA_INCLUDE_DIR}")
+  endif ()
+endif ()