From 75785d2c0e33b9ad6275761c0d93fcb06d04e892 Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Tue, 28 Jan 2025 21:40:58 +0100
Subject: [PATCH] add switch to enable/disable HDF4 support for NeXus.

---
 CMakeLists.txt | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cebedf2f..b4594c21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -200,8 +200,10 @@ endif (qt_based_tools)
 
 #--- if NeXus check also for HDF4, HDF5, and MXML -----------------------------
 if (nexus)
-  find_package(HDF5 COMPONENTS CXX REQUIRED )
-  find_package(HDF4 REQUIRED)
+  find_package(HDF5 COMPONENTS CXX REQUIRED)
+  if (HAVE_HDF4)
+    find_package(HDF4 REQUIRED)
+  endif (HAVE_HDF4)  
   find_package(NEXUS REQUIRED)
   add_definitions(-DPNEXUS_ENABLED)
 endif (nexus)
@@ -286,7 +288,11 @@ endif (OpenMP_FOUND)
 
 if (nexus)
   message("")
-  message(" HDF4    found in ${HDF4_INCLUDE_DIRS}")
+  if (HAVE_HDF4)
+    message(" HDF4    found in ${HDF4_INCLUDE_DIRS}")
+  else (HAVE_HDF4)
+    message(" HDF4    not present.")	  
+  endif (HAVE_HDF4)	  
   message(" HDF5    found in ${HDF5_INCLUDE_DIRS}, Version: ${HDF5_VERSION}")
   message(" NeXus   found in ${NEXUS_INCLUDE_DIR}, Version: ${NEXUS_VERSION_STRING}")
 endif (nexus)