From 9b9e748039e2cb3a1af25f0e045f5759b0dd0011 Mon Sep 17 00:00:00 2001
From: Dana Robinson <43805+derobins@users.noreply.github.com>
Date: Wed, 28 Jul 2021 14:29:55 -0700
Subject: Adds a release note for HDFFV-11192 concerning clang debug opt levels
 (#862)

---
 release_docs/RELEASE.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 6006b1e..26f0170 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -478,6 +478,16 @@ Bug Fixes since HDF5-1.10.7 release
 
     Configuration
     -------------
+    - Autotools clang debug optimization level change
+
+      HDF5 1.10.7 erroneously sets the debug optimization level to "-g" when
+      building with clang via the Autotools. This has now been set to:
+
+        -Og     clang 4+ or Xcode 9+
+        -O1     otherwise
+
+      (DER - 2021/07/28, HDFFV-11192)
+
     - Refactor CMake configure for Fortran
 
       The Fortran configure tests for KINDs reused a single output file that was
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