Fix improper include of build directory (#2422, #2621) (#2667)

1 files changed, 18 insertions, 0 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index a33c97b..96e3e6f 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -240,6 +240,24 @@ Bug Fixes since HDF5-1.13.3 release
 
     Configuration
     -------------
+    - Fixed improper include of Subfiling VFD build directory
+
+      With the release of the Subfiling Virtual File Driver feature, compiler
+      flags were added to the Autotools build's CPPFLAGS and AM_CPPFLAGS
+      variables to always include the Subfiling VFD source code directory,
+      regardless of whether the VFD is enabled and built or not. These flags
+      are needed because the header files for the VFD contain macros that are
+      assumed to always be available, such as H5FD_SUBFILING_NAME, so the
+      header files are unconditionally included in the HDF5 library. However,
+      these flags are only needed when building HDF5, so they belong in the
+      H5_CPPFLAGS variable instead. Inclusion in the CPPFLAGS and AM_CPPFLAGS
+      variables would export these flags to the h5cc and h5c++ wrapper scripts,
+      as well as the libhdf5.settings file, which would break builds of software
+      that use HDF5 and try to use or parse information out of these files after
+      deleting temporary HDF5 build directories.
+
+      (JTH - 2023/04/05 GH-2422, GH-2621)
+
     - Correct the CMake generated pkg-config file
 
       The pkg-config file generated by CMake had the order and placement of the