https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=605e20a698d3f7296cda18ac7dd84b1a8f388b50
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=d125d4f6d1a5d9845824aaf1d1c9dc69699bf2f1

diff --git lib/cdefs.h lib/cdefs.h
index 7d91b06..1cf2ebd 100644
--- lib/cdefs.h
+++ lib/cdefs.h
@@ -40,7 +40,9 @@
    Similarly for __has_builtin, etc.  */
 #if (defined __has_attribute \
      && (!defined __clang_minor__ \
-         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+         || (defined __apple_build_version__ \
+             ? 6000000 <= __apple_build_version__ \
+             : 3 < __clang_major__ + (5 <= __clang_minor__))))
 # define __glibc_has_attribute(attr) __has_attribute (attr)
 #else
 # define __glibc_has_attribute(attr) 0
diff --git lib/config.hin lib/config.hin
index 1a9a70f..026b39c 100644
--- lib/config.hin
+++ lib/config.hin
@@ -2443,7 +2443,9 @@
 /* Attributes.  */
 #if (defined __has_attribute \
      && (!defined __clang_minor__ \
-         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+         || (defined __apple_build_version__ \
+             ? 6000000 <= __apple_build_version__ \
+             : 3 < __clang_major__ + (5 <= __clang_minor__))))
 # define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
 #else
 # define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr