From 0116375ed2f1807c16908bfc63bab001a7c17df2 Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Fri, 15 Feb 2019 16:22:31 -0600
Subject: HDFFV-10703 revert pre-3.11 option

---
 CMakeInstallation.cmake                   | 13 ++++---
 MANIFEST                                  |  1 +
 config/cmake/hdf5-config-version.cmake.in | 58 +++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+), 4 deletions(-)
 create mode 100644 config/cmake/hdf5-config-version.cmake.in

diff --git a/CMakeInstallation.cmake b/CMakeInstallation.cmake
index 6d05a58..7cf3450 100644
--- a/CMakeInstallation.cmake
+++ b/CMakeInstallation.cmake
@@ -104,10 +104,15 @@ endif ()
 # Configure the hdf5-config-version .cmake file for the install directory
 #-----------------------------------------------------------------------------
 if (NOT HDF5_EXTERNALLY_CONFIGURED)
-  write_basic_package_version_file (
-    ${HDF5_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${HDF5_PACKAGE}${HDF_PACKAGE_EXT}-config-version.cmake
-    VERSION ${HDF5_PACKAGE_VERSION}
-    COMPATIBILITY SameMinorVersion
+  # 3.11 or greater
+  #write_basic_package_version_file (
+  #  ${HDF5_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${HDF5_PACKAGE}${HDF_PACKAGE_EXT}-config-version.cmake
+  #  VERSION ${HDF5_PACKAGE_VERSION}
+  #  COMPATIBILITY SameMinorVersion
+  #)
+  configure_file (
+      ${HDF_RESOURCES_DIR}/hdf5-config-version.cmake.in
+      ${HDF5_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${HDF5_PACKAGE}${HDF_PACKAGE_EXT}-config-version.cmake @ONLY
   )
   install (
       FILES ${HDF5_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${HDF5_PACKAGE}${HDF_PACKAGE_EXT}-config-version.cmake
diff --git a/MANIFEST b/MANIFEST
index 0b2026d..6c2018a 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -3240,6 +3240,7 @@
 ./config/cmake/H5cxx_config.h.in
 ./config/cmake/H5pubconf.h.in
 ./config/cmake/hdf5-config.cmake.in
+./config/cmake/hdf5-config-version.cmake.in
 ./config/cmake/HDFCompilerFlags.cmake
 ./config/cmake/HDF5_Process_Flex_Files.cmake
 ./config/cmake/HDF5Macros.cmake
diff --git a/config/cmake/hdf5-config-version.cmake.in b/config/cmake/hdf5-config-version.cmake.in
new file mode 100644
index 0000000..8e16725
--- /dev/null
+++ b/config/cmake/hdf5-config-version.cmake.in
@@ -0,0 +1,58 @@
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
+#
+#-----------------------------------------------------------------------------
+# HDF5 Version file for install directory
+#-----------------------------------------------------------------------------
+#
+# The created file sets PACKAGE_VERSION_EXACT if the current version string and
+# the requested version string are exactly the same and it sets
+# PACKAGE_VERSION_COMPATIBLE if the current version is >= requested version,
+# but only if the requested major.minor version is the same as the current one.
+# The variable HDF5_VERSION_STRING must be set before calling configure_file().
+
+set (PACKAGE_VERSION "@HDF5_VERSION_STRING@")
+
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}" )
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else ()
+  if ("${PACKAGE_FIND_VERSION_MAJOR}" STREQUAL "@H5_VERS_MAJOR@")
+
+    # exact match for version @H5_VERS_MAJOR@.@H5_VERS_MINOR@
+    if ("${PACKAGE_FIND_VERSION_MINOR}" STREQUAL "@H5_VERS_MINOR@")
+
+      # compatible with any version @H5_VERS_MAJOR@.@H5_VERS_MINOR@.x
+      set (PACKAGE_VERSION_COMPATIBLE TRUE)
+
+      if ("${PACKAGE_FIND_VERSION_PATCH}" STREQUAL "@H5_VERS_RELEASE@")
+        set (PACKAGE_VERSION_EXACT TRUE)
+
+        if ("${PACKAGE_FIND_VERSION_TWEAK}" STREQUAL "@H5_VERS_SUBRELEASE@")
+          # not using this yet
+        endif ()
+      endif ()
+    else ()
+      set (PACKAGE_VERSION_COMPATIBLE FALSE)
+    endif ()
+  endif ()
+endif ()
+
+# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
+if("${CMAKE_SIZEOF_VOID_P}"  STREQUAL ""  OR "@CMAKE_SIZEOF_VOID_P@" STREQUAL "")
+   return()
+endif ()
+
+# check that the installed version has the same 32/64bit-ness as the one which is currently searching:
+if(NOT "${CMAKE_SIZEOF_VOID_P}" STREQUAL "@CMAKE_SIZEOF_VOID_P@")
+  math(EXPR installedBits "@CMAKE_SIZEOF_VOID_P@ * 8")
+  set(PACKAGE_VERSION "${PACKAGE_VERSION} (${installedBits}bit)")
+  set(PACKAGE_VERSION_UNSUITABLE TRUE)
+endif ()
-- 
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