From c805d6935ec560549b1c2b44076d1ecc2c1fbd64 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franz=20P=C3=B6schel?= <franz.poeschel@gmail.com>
Date: Wed, 4 Dec 2024 17:23:58 +0100
Subject: [PATCH] Properly check for empty HDF5_VERSION in CMake (#1702)

The old test apparently invoked some weird CMake legacy behavior.
This should make the pinned HDF5 Conda version unnecessary (#1701) since
the version with missing HDF5_VERSION is correctly dealt with.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d84a2d337c..9adaeb94ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -314,7 +314,7 @@ endif()
 string(CONCAT openPMD_HDF5_STATUS "")
 # version: lower limit
 if(openPMD_HAVE_HDF5)
-    if(HDF5_VERSION STREQUAL "")
+    if("${HDF5_VERSION}" STREQUAL "")
         message(WARNING "HDF5_VERSION is empty. Now assuming it is 1.8.13 or newer.")
     else()
         if(HDF5_VERSION VERSION_LESS 1.8.13)