From 4202ae830c9aaae19668061658b06eb146717004 Mon Sep 17 00:00:00 2001
From: Allen Byrne <50328838+byrnHDF@users.noreply.github.com>
Date: Thu, 23 Oct 2025 10:40:32 -0500
Subject: [PATCH] Adjust HDF5Examples HDF5 version var to correct version check
 issue for 2.0 (#5926)

Adjusts H5_LIBVER_DIR in CMakeLists.txt to include release version for major versions above 1, fixing #5925.
---
 CMakeLists.txt                                | 11 ++++--
 .../config/cmake/HDFExampleMacros.cmake       | 34 ++++++++++++++-----
 2 files changed, 34 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 793a7aa7263..16bbc9ac7ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -512,8 +512,15 @@ set (HDF5_PACKAGE_BUGREPORT "help@hdfgroup.org")
 set (HDF5_VERSION_STRING ${HDF5_PACKAGE_VERSION})
 set (HDF5_VERSION_MAJOR  ${HDF5_PACKAGE_VERSION_MAJOR})
 set (HDF5_VERSION_MINOR  ${HDF5_PACKAGE_VERSION_MINOR})
-set (H5_LIBVER_DIR       ${H5_VERS_MAJOR}${H5_VERS_MINOR})
-
+if (H5_VERS_MAJOR GREATER 1)
+  if (H5_VERS_MINOR GREATER 9)
+    set (H5_LIBVER_DIR ${H5_VERS_MAJOR}${H5_VERS_MINOR})
+  else ()
+    set (H5_LIBVER_DIR ${H5_VERS_MAJOR}0${H5_VERS_MINOR})
+  endif()
+else ()
+  set (H5_LIBVER_DIR ${H5_VERS_MAJOR}${H5_VERS_MINOR})
+endif()
 #-----------------------------------------------------------------------------
 # Include some macros for reusable code
 #-----------------------------------------------------------------------------
diff --git a/HDF5Examples/config/cmake/HDFExampleMacros.cmake b/HDF5Examples/config/cmake/HDFExampleMacros.cmake
index 6db35468936..635dcfe4165 100644
--- a/HDF5Examples/config/cmake/HDFExampleMacros.cmake
+++ b/HDF5Examples/config/cmake/HDFExampleMacros.cmake
@@ -304,13 +304,22 @@ macro (HDF5_SUPPORT)
         if (H5EXAMPLE_BUILD_JAVA AND HDF5_Java_FOUND)
           if (${HDF5_PROVIDES_JAVA})
             set (CMAKE_JAVA_INCLUDE_PATH "${CMAKE_JAVA_INCLUDE_PATH};${HDF5_JAVA_INCLUDE_DIRS}")
-            get_target_property (libsoname ${HDF5_JAVA_LIBRARY} IMPORTED_SONAME${UPPER_BUILD_TYPE})
-            get_filename_component (libname ${libsoname} NAME_WE)
-            string (REGEX REPLACE "^lib" "" libname ${libname})
-            message (STATUS "HDF5 lib:${HDF5_JAVA_LIBRARY} OR ${libsoname} OR ${libname}")
-            set (H5EXAMPLE_JAVA_LIBRARY ${libname})
-            set (H5EXAMPLE_JAVA_LIBRARIES ${HDF5_JAVA_LIBRARY})
-            message (STATUS "HDF5 lib:${H5EXAMPLE_JAVA_LIBRARY} jars:${HDF5_JAVA_INCLUDE_DIRS}}")
+            if (HDF5_PROVIDES_JNI AND HDF5_Java_FOUND)
+              get_target_property (libsoname ${HDF5_JAVA_LIBRARY} IMPORTED_SONAME${UPPER_BUILD_TYPE})
+              get_filename_component (libname ${libsoname} NAME_WE)
+              string (REGEX REPLACE "^lib" "" libname ${libname})
+              message (STATUS "HDF5 java lib:${HDF5_JAVA_LIBRARY} OR ${libsoname} OR ${libname}")
+              set (H5EXAMPLE_JAVA_LIBRARY ${libname})
+              set (H5EXAMPLE_JAVA_LIBRARIES ${HDF5_JAVA_LIBRARY})
+            else ()
+              get_target_property (libsoname ${HDF5_C_SHARED_LIBRARY} IMPORTED_SONAME${UPPER_BUILD_TYPE})
+              get_filename_component (libname ${libsoname} NAME_WE)
+              string (REGEX REPLACE "^lib" "" libname ${libname})
+              message (STATUS "HDF5 java lib:${HDF5_C_SHARED_LIBRARY} OR ${libsoname} OR ${libname}")
+              set (H5EXAMPLE_JAVA_LIBRARY ${HDF5_C_SHARED_LIBRARY})
+              set (H5EXAMPLE_JAVA_LIBRARIES ${HDF5_JAVA_LIBRARY})
+            endif ()
+            message (STATUS "HDF5 java lib:${H5EXAMPLE_JAVA_LIBRARY} jars:${HDF5_JAVA_INCLUDE_DIRS}}")
           else ()
             set (H5EXAMPLE_BUILD_JAVA OFF CACHE BOOL "Build Java support" FORCE)
             message (STATUS "HDF5 Java libs not found - disable build of Java examples")
@@ -384,8 +393,15 @@ macro (APIVersion version xyapi)
   if (NOT ${rem} STREQUAL "0")
     math (EXPR minor "${minor} + 1")
   endif ()
-
-  set (${xyapi} "${major}${minor}")
+  if (major GREATER 1)
+    if (minor GREATER 9)
+      set (${xyapi} ${major}${minor})
+    else ()
+      set (${xyapi} ${major}0${minor})
+    endif()
+  else ()
+    set (${xyapi} ${major}${minor})
+  endif()
 
   #-----------------------------------------------------------------------------
   # Option to use 1.6.x API