The identifier linux is used as a predefined macro, so the actually
used path is 1/stat.h or 1/stat64.h. Using the quote-based version
triggers a file lookup for /usr/include/bits/linux/stat.h (or whatever
directory is used to store bits/statx.h), but since bits/ is pretty
much reserved by glibc, this appears to be acceptable.
This is related to GCC PR 80005: incorrect macro expansion of the
argument of __has_include.
Suggested by Zack Weinberg.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+2019-06-14 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/unix/sysv/linux/bits/statx.h: Use string literal in
+ argument to __glibc_has_include to inhibit macro expansion.
+
2019-06-14 Florian Weimer <fweimer@redhat.com>
* misc/sys/cdefs.h (__glibc_has_include): Do not use a
2019-06-14 Florian Weimer <fweimer@redhat.com>
* misc/sys/cdefs.h (__glibc_has_include): Do not use a
#endif
/* Use the Linux kernel header if available. */
#endif
/* Use the Linux kernel header if available. */
-#if __glibc_has_include (<linux/stat.h>)
-# include <linux/stat.h>
+
+/* Use "" to work around incorrect macro expansion of the
+ __has_include argument (GCC PR 80005). */
+#if __glibc_has_include ("linux/stat.h")
+# include "linux/stat.h"
# ifdef STATX_TYPE
# define __statx_timestamp_defined 1
# define __statx_defined 1
# ifdef STATX_TYPE
# define __statx_timestamp_defined 1
# define __statx_defined 1