https://bugs.gentoo.org/950271
https://gcc.gnu.org/PR119016
https://marc.info/?l=subversion-dev&m=174056933428992&w=2

Always take the safe path. It vectorises with GCC 15 at least anyway.
--- a/subversion/include/svn_types.h
+++ b/subversion/include/svn_types.h
@@ -125,15 +125,7 @@ extern "C" {
  *
  * @since New in 1.7.
  */
-#ifndef SVN_UNALIGNED_ACCESS_IS_OK
-# if defined(_M_IX86) || defined(i386) \
-     || defined(_M_X64) || defined(__x86_64) \
-     || defined(__powerpc__) || defined(__ppc__)
-#  define SVN_UNALIGNED_ACCESS_IS_OK 1
-# else
 #  define SVN_UNALIGNED_ACCESS_IS_OK 0
-# endif
-#endif