commit 8d141877e07cc594e9fefc3795b8ba729288093c

Author: Florian Weimer <fweimer@redhat.com>

Date:   Fri Jun 14 15:46:02 2019 +0200

    <sys/cdefs.h>: Inhibit macro expansion for __glibc_has_include

    This is currently ineffective with GCC because of GCC PR 80005, but

    it makes sense to anticipate a fix for this defect.

    Suggested by Zack Weinberg.

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h

index 0500779d0c1b64c2..9e840e602f815d86 100644

--- a/misc/sys/cdefs.h

+++ b/misc/sys/cdefs.h

@@ -413,7 +413,9 @@

 #endif

 #ifdef __has_include

-# define __glibc_has_include(header)	__has_include (header)

+/* Do not use a function-like macro, so that __has_include can inhibit

+   macro expansion.  */

+# define __glibc_has_include __has_include

 #else

 # define __glibc_has_include(header)	0

 #endif