doc + note

sarnex · sarnex · commit d08dcee41285 · 2025-07-28T07:49:28.000-07:00
Signed-off-by: Sarnie, Nick &lt;nick.sarnie@intel.com&gt;
diff --git a/clang/docs/LanguageExtensions.rst b/clang/docs/LanguageExtensions.rst
@@ -68,6 +68,9 @@ It can be used like this:
   ``__has_builtin`` should not be used to detect support for a builtin macro;
   use ``#ifdef`` instead.
 
+  When compiling with target offloading, ``__has_builtin`` only considers the
+  currently active target.
+
 ``__has_constexpr_builtin``
 ---------------------------
 
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
@@ -98,6 +98,8 @@ Non-comprehensive list of changes in this release
   This feature is enabled by default but can be disabled by compiling with 
   ``-fno-sanitize-annotate-debug-info-traps``.
 
+- The ``__has_builtin`` function now only considers the currently active target when being used with target offloading.
+
 New Compiler Flags
 ------------------
 - New option ``-fno-sanitize-annotate-debug-info-traps`` added to disable emitting trap reasons into the debug info when compiling with trapping UBSan (e.g. ``-fsanitize-trap=undefined``).
