[PATCH] libio: Define AT_RENAME_* with the same tokens as Linux

[Florian Weimer]

Linux uses different expressions for the RENAME_* and AT_RENAME_*
constants.  Mirror that in <stdio.h>, so that the macro redefinitions
do not result in preprocessor warnings.

Tested on powerpc64-linux-gnu.  Built on i686-gnu and x86_64-gnu.

---
 libio/stdio.h                | 6 +++---
 stdio-common/tst-renameat2.c | 6 ++++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/libio/stdio.h b/libio/stdio.h
index d042b36618..e0e70945fa 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -168,11 +168,11 @@ extern int renameat (int __oldfd, const char *__old, int __newfd,
 #ifdef __USE_GNU
 /* Flags for renameat2.  */
 # define RENAME_NOREPLACE (1 << 0)
-# define AT_RENAME_NOREPLACE RENAME_NOREPLACE
+# define AT_RENAME_NOREPLACE 0x0001
 # define RENAME_EXCHANGE (1 << 1)
-# define AT_RENAME_EXCHANGE RENAME_EXCHANGE
+# define AT_RENAME_EXCHANGE 0x0002
 # define RENAME_WHITEOUT (1 << 2)
-# define AT_RENAME_WHITEOUT RENAME_WHITEOUT
+# define AT_RENAME_WHITEOUT 0x0004
 
 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
    additional flags.  */
diff --git a/stdio-common/tst-renameat2.c b/stdio-common/tst-renameat2.c
index 12aa0f8b0f..6213e1376d 100644
--- a/stdio-common/tst-renameat2.c
+++ b/stdio-common/tst-renameat2.c
@@ -28,6 +28,12 @@
 #include <support/xunistd.h>
 #include <unistd.h>
 
+/* These constants are defined with different token sequences,
+   matching the Linux definitions, to avoid preprocessor warnings.  */
+_Static_assert (RENAME_NOREPLACE == AT_RENAME_NOREPLACE, "RENAME_NOREPLACE");
+_Static_assert (RENAME_EXCHANGE == AT_RENAME_EXCHANGE, "RENAME_EXCHANGE");
+_Static_assert (RENAME_WHITEOUT == AT_RENAME_WHITEOUT, "RENAME_WHITEOUT");
+
 /* Directory with the temporary files.  */
 static char *directory;
 static int directory_fd;

base-commit: 54bd776f991f1a228a6bb6d76bf542edd915a0e3