From 68cecdb9674e84bcdf35460691a4e0948c2392d4 Mon Sep 17 00:00:00 2001
From: Scot Breitenfeld <brtnfld@hdfgroup.org>
Date: Fri, 22 Sep 2023 17:08:50 -0500
Subject: [PATCH 1/2] removed the use of -commons linking option on Darwin as
 COMMON and EQUIVALENCE is no long used

---
 configure.ac          | 8 --------
 fortran/src/H5_ff.F90 | 2 --
 2 files changed, 10 deletions(-)

diff --git a/configure.ac b/configure.ac
index 15f7bb4e69e..37252d9a76a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1074,14 +1074,6 @@ H5_FORTRAN_SHARED="no"
 if test "X${HDF_FORTRAN}" = "Xyes" && test "X${enable_shared}" != "Xno"; then
   AC_MSG_CHECKING([if shared Fortran libraries are supported])
   H5_FORTRAN_SHARED="yes"
-  ## tell libtool to do the right thing with COMMON symbols, this fixes
-  ## corrupt values with COMMON and EQUIVALENCE when building shared
-  ## Fortran libraries on OSX with gnu and Intel compilers (HDFFV-2772).
-  case "`uname`" in
-    Darwin*)
-    H5_LDFLAGS="$H5_LDFLAGS -Wl,-commons,use_dylibs"
-    ;;
-  esac
 
   ## Report results of check(s)
 
diff --git a/fortran/src/H5_ff.F90 b/fortran/src/H5_ff.F90
index 7bd2e261929..68b3dd874bb 100644
--- a/fortran/src/H5_ff.F90
+++ b/fortran/src/H5_ff.F90
@@ -12,8 +12,6 @@
 ! PURPOSE
 !  This module is used to pass C stubs for H5 Fortran APIs. The C stubs are
 !  packed into arrays in H5_f.c and these arrays are then passed to Fortran.
-!  This module then uses EQUIVALENCE to assign elements of the arrays to
-!  Fortran equivalent C stubs.
 !
 ! NOTES
 !  The size of the C arrays in H5_f.c has to match the values of the variables

From 3d2a15c83d6508052732ffebf36fde49016a97ca Mon Sep 17 00:00:00 2001
From: Scot Breitenfeld <brtnfld@hdfgroup.org>
Date: Mon, 25 Sep 2023 14:05:12 -0500
Subject: [PATCH 2/2] added release note

---
 release_docs/RELEASE.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index fa088951d89..0e1dbe42b3b 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -261,6 +261,11 @@ New Features
       h5pget_file_space_page_size_f, h5pset_file_space_page_size_f,
       h5pget_file_space_strategy_f, h5pset_file_space_strategy_f
 
+    - Removed "-commons" linking option on Darwin, as COMMON and EQUIVALENCE
+      are no longer used in the Fortran source.
+
+      Fixes GitHub issue #3571
+
     C++ Library:
     ------------
     -