Add ZFP dependency support

cmake/FindZFP.cmake

+#------------------------------------------------------------------------------#
+# Distributed under the OSI-approved Apache License, Version 2.0.  See
+# accompanying file Copyright.txt for details.
+#------------------------------------------------------------------------------#
+#
+# FindZFP
+# -----------
+#
+# Try to find the zfp library
+#
+# This module defines the following variables:
+#
+#   ZFP_FOUND        - System has zfp
+#   ZFP_INCLUDE_DIRS - The zfp include directory
+#   ZFP_LIBRARIES    - Link these to use zfp
+#
+# and the following imported targets:
+#   zfp::zfp - The zfp compression library target
+#
+# You can also set the following variable to help guide the search:
+#   ZFP_ROOT_DIR - The install prefix for zfp containing the
+#                  include and lib folders
+#                  Note: this can be set as a CMake variable or an
+#                        environment variable.  If specified as a CMake
+#                        variable, it will override any setting specified
+#                        as an environment variable.
+
+if(NOT ZFP_FOUND)
+  if((NOT ZFP_ROOT_DIR) AND (NOT (ENV{ZFP_ROOT_DIR} STREQUAL "")))
+    set(ZFP_ROOT_DIR "$ENV{ZFP_ROOT_DIR}")
+  endif()
+  if(ZFP_ROOT_DIR)
+    set(ZFP_INCLUDE_OPTS HINTS ${ZFP_ROOT_DIR}/include NO_DEFAULT_PATHS)
+    set(ZFP_LIBRARY_OPTS
+      HINTS ${ZFP_ROOT_DIR}/lib ${ZFP_ROOT_DIR}/lib64
+      NO_DEFAULT_PATHS
+    )
+  endif()
+
+  find_path(ZFP_INCLUDE_DIR zfp.h ${ZFP_INCLUDE_OPTS})
+  find_library(ZFP_LIBRARY zfp ${ZFP_LIBRARY_OPTS})
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(ZFP
+    FOUND_VAR ZFP_FOUND
+    REQUIRED_VARS ZFP_LIBRARY ZFP_INCLUDE_DIR
+  )
+  if(ZFP_FOUND)
+    set(ZFP_INCLUDE_DIRS ${ZFP_INCLUDE_DIR})
+    set(ZFP_LIBRARIES ${ZFP_LIBRARY})
+    if(ZFP_FOUND AND NOT TARGET zfp::zfp)
+      add_library(zfp::zfp UNKNOWN IMPORTED)
+      set_target_properties(zfp::zfp PROPERTIES
+        IMPORTED_LOCATION             "${ZFP_LIBRARY}"
+        INTERFACE_INCLUDE_DIRECTORIES "${ZFP_INCLUDE_DIR}"
+      )
+    endif()
+  endif()
+endif()