[PATCH v1 09/35] Remove dead code due to __glibc_c99_flexarr_available macro

[Alejandro Colomar]

It's unconditionally defined as 1.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 misc/sys/cdefs.h                      | 12 ------------
 sysdeps/unix/sysv/linux/bits/socket.h |  6 ------
 2 files changed, 18 deletions(-)

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 87c3581bb7..12b424e85c 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -352,18 +352,6 @@
 # define __errordecl(name, msg) extern void name (void)
 #endif
 
-/* Support for flexible arrays.
-   Headers that should use flexible arrays only if they're "real"
-   (e.g. only if they won't affect sizeof()) should test
-   #if __glibc_c99_flexarr_available.  */
-#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L && !defined __HP_cc
-# define __glibc_c99_flexarr_available 1
-#else
-/* GCC and clang support C99 flexible array members as an extension,
-   even when in C89 mode or compiling C++ (any version).  */
-# define __glibc_c99_flexarr_available 1
-#endif
-
 
 /* __asm__ ("xyz") is used throughout the headers to rename functions
    at the assembly language level.  This is wrapped by the __REDIRECT
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
index ac22e11c4d..66d33e8a65 100644
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/bits/socket.h
@@ -289,17 +289,11 @@ struct cmsghdr
 				   with this.  */
     int cmsg_level;		/* Originating protocol.  */
     int cmsg_type;		/* Protocol specific type.  */
-#if __glibc_c99_flexarr_available
     __extension__ unsigned char __cmsg_data[]; /* Ancillary data.  */
-#endif
   };
 
 /* Ancillary data object manipulation macros.  */
-#if __glibc_c99_flexarr_available
 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
-#else
-# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
-#endif
 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
 #define CMSG_FIRSTHDR(mhdr) \
   ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
-- 
2.51.0