From ef56653157f8b2a2a342f4ee824d9b54e8484f8d Mon Sep 17 00:00:00 2001
From: steven varga <steven@vargaconsulting.ca>
Date: Sat, 30 May 2026 16:37:55 +0000
Subject: [PATCH] [#295]:svarga:build, honor CMP0074 so examples find_package
 respects HDF5_ROOT

---
 examples/CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index ef6c3f3d00..634a6b42c7 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -7,6 +7,13 @@ cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 ## match hdf5 versioning x.x.x.h5cpp-version
 project(h5cpp-examples VERSION 1.10.4.5 LANGUAGES CXX C)
 
+# Honor <PackageName>_ROOT (CMP0074, CMake 3.12+). The cmake_minimum_required
+# above predates it, so without this find_package(HDF5) below would silently
+# ignore the HDF5_ROOT we build for custom HDF Group installs. (#295)
+if(POLICY CMP0074)
+	cmake_policy(SET CMP0074 NEW)
+endif()
+
 # check if the correct version of hdf5 available
 set(H5CPP_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})