Create bits/types headers for most remaining __T_defined macros.

This doesn't exactly fit the theme but as long as I'm tinkering with
sys/types.h it makes sense to go through and create single-declaration
bits/types/ headers for all of the remaining cases where we have
two or more headers declaring a public type.

The remaining uses of the original __T_defined idiom are:
__error_t_defined in files shared with gnulib, which probably has to
remain as is; ____gwchar_t_defined in inttypes.h, which may not be
necessary anymore and should be addressed separately, and
__ldiv_t_defined and __lldiv_t_defined in stdlib.h, ditto.

Our handling of LFS types is a little inconsistent: some headers
declare both off_t and off64_t (for instance) when
_LARGEFILE64_SOURCE, others will only declare off_t regardless of
_LARGEFILE64_SOURCE.  I don't know if this was intentional or not.
I am tempted to centralize responsibility for _LARGEFILE64_SOURCE as
well as _FILE_OFFSET_BITS=64 in bits/types/off_t.h (etc) so that any
header that declares off_t will automatically also declare off64_t
when _LARGEFILE64_SOURCE.

sunrpc/rpc/types.h is special, because it is included in files
compiled by the *build* compiler (cross-rpcgen-objs), and therefore it
cannot unconditionally assume bits/types headers are available.  What
I did was have it include the appropriate bits/types headers only if
including sys/types.h did not cause __BIT_TYPES_DEFINED__ to be
defined.  This will do the right thing when an installed rpc/types.h
is included by application code compiled without __USE_MISC in effect.
During the build, we rely on the fact that we compile all of our own
code with __USE_MISC in effect.  This is fragile, but should be
acceptable for code that's no longer built by default anyway.

scripts/check-obsolete-constructs.py ensures that only sys/types.h and
rpc/types.h include the bits/types/ headers that define obsolete types.

	* posix/bits/types/blkcnt64_t.h
	* posix/bits/types/blkcnt_t.h
	* posix/bits/types/blksize_t.h
	* posix/bits/types/dev_t.h
	* posix/bits/types/fsblkcnt64_t.h
	* posix/bits/types/fsblkcnt_t.h
	* posix/bits/types/fsfilcnt64_t.h
	* posix/bits/types/fsfilcnt_t.h
	* posix/bits/types/fsid_t.h
	* posix/bits/types/gid_t.h
	* posix/bits/types/id_t.h
	* posix/bits/types/ino64_t.h
	* posix/bits/types/ino_t.h
	* posix/bits/types/intptr_t.h
	* posix/bits/types/key_t.h
	* posix/bits/types/loff_t.h
	* posix/bits/types/mode_t.h
	* posix/bits/types/nlink_t.h
	* posix/bits/types/off64_t.h
	* posix/bits/types/off_t.h
	* posix/bits/types/pid_t.h
	* posix/bits/types/socklen_t.h
	* posix/bits/types/ssize_t.h
	* posix/bits/types/suseconds_t.h
	* posix/bits/types/uid_t.h
	* posix/bits/types/useconds_t.h:
        New single-declaration headers for standard types canonically
	defined by sys/types.h, sys/socket.h, or inttypes.h but also
	exposed by other headers under some circumstances.  Code moved
        from posix/sys/types.h, socket/sys/socket.h, stdlib/inttypes.h
        as appropriate.

	* posix/bits/types/uint.h
	* posix/bits/types/u_int.h
	* posix/bits/types/u_intN_t.h
	* posix/bits/types/caddr_t.h
	* posix/bits/types/daddr_t.h
	* posix/bits/types/loff_t.h
	* posix/bits/types/register_t.h:
        Similarly, but for obsolete BSD-derived types whose canonical
	home is sys/types.h.  Some of these headers define more than
	one type.

        * posix/Makefile (headers): Install the above new headers.
        Rewrap the list.
        * posix/sys/types.h: All definitions of public types now
        accomplished using the above new headers.  Consolidate
        groups of definitions controlled by the same feature
        selection macros.

        * inet/arpa/inet.h, bits/socket.h
        * sysdeps/mach/hurd/bits/socket.h
        * sysdeps/unix/sysv/linux/bits/socket.h:
        Use bits/types/socklen_t.h.

        * dirent/dirent.h: Use bits/types/ino_t.h and bits/types/ino64_t.h.
        * grp/grp.h: Use bits/types/gid_t.h.
        * io/fcntl.h: Use bits/types/mode_t.h, bits/types/off_t.h,
        bits/types/pid_t.h, and bits/types/off64_t.h.
        * io/sys/stat.h: Use bits/types/dev_t.h, bits/types/gid_t.h,
        bits/types/ino_t.h, bits/types/mode_t.h, bits/types/nlink_t.h,
        bits/types/off_t.h, bits/types/uid_t.h, and bits/types/blkcnt_t.h.
        * libio/stdio.h: Use bits/types/off_t.h, bits/types/off64_t.h,
        and bits/types/ssize_t.h.
        * misc/sys/mman.h: Use bits/types/off_t.h and bits/types/mode_t.h.
        * misc/sys/select.h: Use bits/types/suseconds_t.h.
        * posix/sched.h: Use bits/types/pid_t.h.
        * posix/sys/wait.h: Use bits/types/pid_t.h and bits/types/id_t.h.
        * posix/unistd.h: Use bits/types/gid_t.h, bits/types/uid_t.h,
        bits/types/off_t.h, bits/types/off64_t.h, bits/types/useconds_t.h,
        bits/types/intptr_t.h, and bits/types/socklen_t.h.
        * pwd/pwd.h: Use bits/types/gid_t.h and bits/types/uid_t.h.
        * resource/sys/resource.h: Use bits/types/id_t.h.
        * signal/signal.h: Use bits/types/pid_t.h and bits/types/uid_t.h.
        * stdlib/monetary.h: Use bits/types/ssize_t.h.
        * sysdeps/gnu/utmpx.h: Use bits/types/pid_t.h.
        * sysvipc/sys/ipc.h: Use bits/types/uid_t.h, bits/types/gid_t.h,
        bits/types/mode_t.h, and bits/types/key_t.h.
        * sysvipc/sys/msg.h: Use bits/types/pid_t.h and bits/types/ssize_t.h.
        * sysvipc/sys/shm.h: Use bits/types/pid_t.h.
        * termios/termios.h: Use bits/types/pid_t.h.
        * time/sys/time.h: Use bits/types/suseconds_t.h.
        * time/time.h: Use bits/types/pid_t.h.

        * sunrpc/rpc/types.h: Consolidate all #includes at the top of
        the file.  If __BIT_TYPES_DEFINED__ is not defined after
        including sys/types.h, also include bits/types/caddr_t.h,
        bits/types/daddr_t.h, bits/types/fsid_t.h, and bits/types/u_int.h.

        * scripts/check-obsolete-constructs.py (OBSOLETE_TYPE_HDR_RE_): New.
        (ObsoleteIndirectDefinitionsAllowed): New; allows inclusion of
        bits/types/ headers that define obsolete typedefs, but not
        direct definitions of those types.
        (ObsoleteNotAllowed, ObsoletePrivateDefinitionsAllowed)
        (ObsoletePublicDefinitionsAllowed): Do not allow inclusion of
        bits/types/ headers that define obsolete typedefs.

	* include/bits/types/blkcnt64_t.h
	* include/bits/types/blkcnt_t.h
	* include/bits/types/blksize_t.h
	* include/bits/types/caddr_t.h
	* include/bits/types/daddr_t.h
	* include/bits/types/dev_t.h
	* include/bits/types/fsblkcnt64_t.h
	* include/bits/types/fsblkcnt_t.h
	* include/bits/types/fsfilcnt64_t.h
	* include/bits/types/fsfilcnt_t.h
	* include/bits/types/fsid_t.h
	* include/bits/types/gid_t.h
	* include/bits/types/id_t.h
	* include/bits/types/ino64_t.h
	* include/bits/types/ino_t.h
	* include/bits/types/intptr_t.h
	* include/bits/types/key_t.h
	* include/bits/types/loff_t.h
	* include/bits/types/mode_t.h
	* include/bits/types/nlink_t.h
	* include/bits/types/off64_t.h
	* include/bits/types/off_t.h
	* include/bits/types/pid_t.h
	* include/bits/types/register_t.h
	* include/bits/types/socklen_t.h
	* include/bits/types/ssize_t.h
	* include/bits/types/suseconds_t.h
	* include/bits/types/u_char.h
	* include/bits/types/u_intN_t.h
	* include/bits/types/uchar.h
	* include/bits/types/uid_t.h
	* include/bits/types/useconds_t.h: New wrappers.

3 files changed, 3 insertions, 17 deletions

diff --git a/sysdeps/gnu/utmpx.h b/sysdeps/gnu/utmpx.h
index f50a0dbeb9..b1a82a46cf 100644
--- a/sysdeps/gnu/utmpx.h
+++ b/sysdeps/gnu/utmpx.h
@@ -22,10 +22,7 @@
 #include <sys/time.h>
 
 /* Required according to Unix98.  */
-#ifndef __pid_t_defined
-typedef __pid_t pid_t;
-# define __pid_t_defined
-#endif
+#include <bits/types/pid_t.h>
 
 /* Get system dependent values and data structures.  */
 #include <bits/utmpx.h>
diff --git a/sysdeps/mach/hurd/bits/socket.h b/sysdeps/mach/hurd/bits/socket.h
index ff898aa188..06a731184b 100644
--- a/sysdeps/mach/hurd/bits/socket.h
+++ b/sysdeps/mach/hurd/bits/socket.h
@@ -29,13 +29,7 @@
 
 #include <bits/wordsize.h>
 #include <sys/types.h>
-
-/* Type for length arguments in socket calls.  */
-#ifndef __socklen_t_defined
-typedef __socklen_t socklen_t;
-# define __socklen_t_defined
-#endif
-
+#include <bits/types/socklen_t.h>
 
 /* Types of sockets.  */
 enum __socket_type
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
index 50f89db2ac..f275b33499 100644
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/bits/socket.h
@@ -27,12 +27,7 @@
 #include <stddef.h>
 
 #include <sys/types.h>
-
-/* Type for length arguments in socket calls.  */
-#ifndef __socklen_t_defined
-typedef __socklen_t socklen_t;
-# define __socklen_t_defined
-#endif
+#include <bits/types/socklen_t.h>
 
 /* Get the architecture-dependent definition of enum __socket_type.  */
 #include <bits/socket_type.h>