Installed-header hygiene (BZ#20366): Simple self-contained fixes.

Some headers did not include all of their prerequisite headers.

	* rpcsvc/nislib.h: Include rpcsvc/nis.h.
	* sysdeps/unix/sysv/linux/netrose/rose.h:
	Include sys/socket.h and netax25/ax25.h.

<endian.h> only defines BYTE_ORDER, BIG_ENDIAN, LITTLE_ENDIAN,
etc. under __USE_MISC; glibc's headers should use __BYTE_ORDER,
__BIG_ENDIAN, __LITTLE_ENDIAN, etc. instead.

	* inet/netinet/icmp6.h, inet/netinet/ip6.h
	* resolv/arpa/nameser_compat.h:
	Use __BYTE_ORDER etc. instead of BYTE_ORDER etc.

sys/types.h only conditionally defines caddr_t and clockid_t.

	* sysdeps/unix/sysv/linux/sys/quota.h:
	Use __caddr_t instead of caddr_t.
	* sysdeps/unix/sysv/linux/sys/timerfd.h:
	Use __clockid_t instead of clockid_t.

Remove a #warning that was the sole actual problem with using sys/ipc.h
without _GNU_SOURCE/_XOPEN_SOURCE.

	* sysvipc/sys/ipc.h: Remove unnecessary #warning.

_LIBC, __USE_XOPEN2K8, and __STDC_VERSION__ are not always defined.

It seems to me that _LIBC should not appear in installed headers, but
avoiding that for argp specifically would require more surgery than
feels appropriate for this patch set.  It's possible that
"#ifdef _LIBC" would be sufficient, but I wanted to be conservative.

All three versions of bits/socket.h want to know whether __flexarr
will produce a real flexible array member -- specifically, one that
doesn't alter sizeof(the structure containing it).  They were testing
for this with a complicated #if condition that did not agree with
sys/cdefs.h and that tripped -Wundef warnings under -std=c90.
I added a new macro to sys/cdefs.h, __glibc_c99_flexarr_available,
which reveals exactly what these headers want to know.  I also took
the opportunity to flatten the rather messy conditional nest defining
__flexarr.

	* argp/argp.h: Check whether _LIBC is defined before expanding it.
	* posix/glob.h: Check whether __USE_XOPEN2K8 is defined instead
	of expanding it.

	* misc/sys/cdefs.h: Tidy up conditional nest defining __flexarr.
	Define __glibc_c99_flexarr_available to 1 when the compiler
	supports C99-compatible flexible array members, 0 otherwise.
	* sysdeps/unix/sysv/linux/bits/socket.h
	* sysdeps/mach/hurd/bits/socket.h
	* bits/socket.h: Use __glibc_c99_flexarr_available in
	definitions of struct cmsghdr and CMSG_DATA.

2 files changed, 10 insertions, 10 deletions

diff --git a/inet/netinet/icmp6.h b/inet/netinet/icmp6.h
index b7a9637..89e3f8d 100644
--- a/inet/netinet/icmp6.h
+++ b/inet/netinet/icmp6.h
@@ -160,11 +160,11 @@ struct nd_neighbor_advert     /* neighbor advertisement */
 #define nd_na_code               nd_na_hdr.icmp6_code
 #define nd_na_cksum              nd_na_hdr.icmp6_cksum
 #define nd_na_flags_reserved     nd_na_hdr.icmp6_data32[0]
-#if     BYTE_ORDER == BIG_ENDIAN
+#if     __BYTE_ORDER == __BIG_ENDIAN
 #define ND_NA_FLAG_ROUTER        0x80000000
 #define ND_NA_FLAG_SOLICITED     0x40000000
 #define ND_NA_FLAG_OVERRIDE      0x20000000
-#else   /* BYTE_ORDER == LITTLE_ENDIAN */
+#else   /* __BYTE_ORDER == __LITTLE_ENDIAN */
 #define ND_NA_FLAG_ROUTER        0x00000080
 #define ND_NA_FLAG_SOLICITED     0x00000040
 #define ND_NA_FLAG_OVERRIDE      0x00000020
@@ -298,10 +298,10 @@ struct rr_pco_use      /* use prefix part */
 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x20
 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x10
 
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 # define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
 # define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
-#elif BYTE_ORDER == LITTLE_ENDIAN
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
 # define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
 # define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
 #endif
@@ -315,10 +315,10 @@ struct rr_result       /* router renumbering result message */
     struct in6_addr     rrr_prefix;
   };
 
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 # define ICMP6_RR_RESULT_FLAGS_OOB       0x0002
 # define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
-#elif BYTE_ORDER == LITTLE_ENDIAN
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
 # define ICMP6_RR_RESULT_FLAGS_OOB       0x0200
 # define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
 #endif
diff --git a/inet/netinet/ip6.h b/inet/netinet/ip6.h
index 929d4b5..bd02c94 100644
--- a/inet/netinet/ip6.h
+++ b/inet/netinet/ip6.h
@@ -101,11 +101,11 @@ struct ip6_frag
     uint32_t  ip6f_ident;	/* identification */
   };
 
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 # define IP6F_OFF_MASK       0xfff8  /* mask out offset from _offlg */
 # define IP6F_RESERVED_MASK  0x0006  /* reserved bits in ip6f_offlg */
 # define IP6F_MORE_FRAG      0x0001  /* more-fragments flag */
-#else   /* BYTE_ORDER == LITTLE_ENDIAN */
+#else   /* __BYTE_ORDER == __LITTLE_ENDIAN */
 # define IP6F_OFF_MASK       0xf8ff  /* mask out offset from _offlg */
 # define IP6F_RESERVED_MASK  0x0600  /* reserved bits in ip6f_offlg */
 # define IP6F_MORE_FRAG      0x0100  /* more-fragments flag */
@@ -175,11 +175,11 @@ struct ip6_opt_router
   };
 
 /* Router alert values (in network byte order) */
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 # define IP6_ALERT_MLD	0x0000
 # define IP6_ALERT_RSVP	0x0001
 # define IP6_ALERT_AN	0x0002
-#else /* BYTE_ORDER == LITTLE_ENDING */
+#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
 # define IP6_ALERT_MLD	0x0000
 # define IP6_ALERT_RSVP	0x0100
 # define IP6_ALERT_AN	0x0200