glibc/SOURCES/glibc-rh1699194-4.patch

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2019-08-05 14:38:49 +00:00
commit 48c3c1238925410b4e777dc94e2fde4cc9132d44
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Jun 14 16:28:41 2019 +0200
Linux: Fix __glibc_has_include use for <sys/stat.h> and statx
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>
diff --git a/sysdeps/unix/sysv/linux/bits/statx.h b/sysdeps/unix/sysv/linux/bits/statx.h
index d36f44efc60a0bed..206878723fd37881 100644
--- a/sysdeps/unix/sysv/linux/bits/statx.h
+++ b/sysdeps/unix/sysv/linux/bits/statx.h
@@ -23,8 +23,11 @@
#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