From 4e86e523e7f0e419b990520a15ef7d524102cd06 Mon Sep 17 00:00:00 2001
From: Guilherme Amadio <amadio@gentoo.org>
Date: Mon, 23 Aug 2021 13:18:25 +0200
Subject: [PATCH] Rename Geant4::HDF5 to hdf5::hdf5

Needed to be compatible with CMake 3.20, which now provides imported
targets for HDF5 (https://cmake.org/cmake/help/v3.20/module/FindHDF5.html).
---
 cmake/Modules/G4HDF5Shim.cmake           | 16 ++++++++--------
 cmake/Modules/G4OptionalComponents.cmake |  2 +-

diff --git a/cmake/Modules/G4HDF5Shim.cmake b/cmake/Modules/G4HDF5Shim.cmake
index 963a7bb5be..97d97248d8 100644
--- a/cmake/Modules/G4HDF5Shim.cmake
+++ b/cmake/Modules/G4HDF5Shim.cmake
@@ -1,10 +1,10 @@
- # - G4HDF5Shim
+# - G4HDF5Shim
 #
 # Geant4's Geant4Config.cmake file aims to support CMake 3.8 and newer
 # The HDF5 dependency is located through CMake's builtin FindHDF5
-# module, but this does not supply imported targets as of CMake 3.16.
+# module, but this does not supply imported targets until CMake 3.20.
 # It may use HDF5's hdf5-config.cmake file if available, so create
-# custom imported target Geant4::HDF5 to allow both cases to be handled
+# custom imported target hdf5::hdf5 to allow both cases to be handled
 # without interference with either.
  
 if(HDF5_FOUND)
@@ -24,18 +24,18 @@ if(HDF5_FOUND)
    endif()
  endif()
 
- # As FindHDF5 does not yet supply imported targets, we
+ # If FindHDF5 does not yet supply imported targets, we
  # create an internal INTERFACE target to wrap these.
  # This still hard-codes include/library paths, but limits it
  # to one place. Later, we'll create proper imported targets
  # with re-finds but for now this is the best minimally invasive proceedure
- if(NOT TARGET Geant4::HDF5)
-   add_library(Geant4::HDF5 IMPORTED UNKNOWN)
-   set_target_properties(Geant4::HDF5 PROPERTIES
+ if(NOT TARGET hdf5::hdf5)
+   add_library(hdf5::hdf5 IMPORTED UNKNOWN)
+   set_target_properties(hdf5::hdf5 PROPERTIES
      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
      IMPORTED_LOCATION "${HDF5_C_LIBRARY_hdf5}"
      INTERFACE_INCLUDE_DIRECTORIES "${HDF5_C_INCLUDE_DIRS}"
      INTERFACE_LINK_LIBRARIES "${HDF5_C_LIBRARIES}"
      )
  endif()
-endif()
\ No newline at end of file
+endif()
diff --git a/cmake/Modules/G4OptionalComponents.cmake b/cmake/Modules/G4OptionalComponents.cmake
index c0639a538b..77b3c91241 100644
--- a/cmake/Modules/G4OptionalComponents.cmake
+++ b/cmake/Modules/G4OptionalComponents.cmake
@@ -369,7 +369,7 @@ if(GEANT4_USE_HDF5)
   find_package(HDF5 1.8 REQUIRED)
   include("${CMAKE_CURRENT_LIST_DIR}/G4HDF5Shim.cmake")
   # Backward compatibility
-  set(HDF5_LIBRARIES Geant4::HDF5)
+  set(HDF5_LIBRARIES hdf5::hdf5)
 
   # May have found via config mode...
   if(HDF5_DIR)
-- 
2.33.0