Update.cvs/libc-ud-971125

1997-11-26 04:28  Ulrich Drepper  <drepper@cygnus.com>

	* eld/dl-profile.c (_dl_start_profile): Avoid FP calculation when
	computing s_scale.  Patch by a sun <asun@zoology.washington.edu>.

	* iconv/gconv_close.c: Correct freeing of descriptor data.
	* iconv/gconv_simple.c: Return correct error values for illegal or
	incomplete characters.

	* Makefile (iconvdata/%): Special goal to simplify iconvdata
	development.
	* iconvdata/Makefile: New file.
	* iconvdata/configure: Likewise.
	* iconvdata/extra-module.mk: Likewise.
	* iconvdata/gconv-modules: Likewise.
	* iconvdata/iso6937.c: Likewise.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/iso8859-10.c: Likewise.
	* iconvdata/iso8859-10.h: Likewise.
	* iconvdata/iso8859-2.c: Likewise.
	* iconvdata/iso8859-2.h: Likewise.
	* iconvdata/iso8859-3.c: Likewise.
	* iconvdata/iso8859-3.h: Likewise.
	* iconvdata/iso8859-4.c: Likewise.
	* iconvdata/iso8859-4.h: Likewise.
	* iconvdata/iso8859-5.c: Likewise.
	* iconvdata/iso8859-5.h: Likewise.
	* iconvdata/iso8859-6.c: Likewise.
	* iconvdata/iso8859-6.h: Likewise.
	* iconvdata/iso8859-7.c: Likewise.
	* iconvdata/iso8859-7.h: Likewise.
	* iconvdata/iso8859-8.c: Likewise.
	* iconvdata/iso8859-8.h: Likewise.
	* iconvdata/iso8859-9.c: Likewise.
	* iconvdata/iso8859-9.h: Likewise.
	* iconvdata/iso8859-generic.c: Likewise.
	* iconvdata/t61.c: Likewise.

	* string/Makefile (routines): Add strcasestr.
	* string/string.h: Add prototype for strcasestr.
	* sysdeps/generic/strcasestr.c: New file.
	* wcsmbs/mbrtowc.c: Simplify special case a bit.
	* wcsmbs/wcrtomb.c: Likewise.
	* wcsmbs/mbsnrtowcs.c: Correctly handle incomplete characters.
	* wcsmbs/wcsnrtombs.c: Likewise.
	* wcsmbs/mbsrtowcs.c: Make sure SRC argument is correct when
	partial character is read.
	* wcsmbs/wcsrtombs.c: Likewise.
	* wcsmbs/wmemrtombs.c: Likewise.
	* wcsmbs/wmemrtowcs.c: Likewise.

	* io/ftw.h: Include <sys/stat.h> instead of <bits/stat.h>.
	* login/pty.h: Include <sys/ioctl.h> instead og <bits/ioctl-types.h>.
	* sysdeps/i386/__longjmp.S: Define _SETJMP_H.
	* sysdeps/i386/elf/setjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/kernel_termios.h: Do include
	<bits/termios.h>.

	* sysdeps/posix/mk-stdiolim.c: Output file with comment.
	* sysdeps/unix/sysv/linux/stdio_lim.h.in: Add comment.

	* sysdeps/unix/sysv/linux/sys/mman.h: Pretty print.
	* sysvipc/sys/ipc.h: Likewise.
	* sysvipc/sys/msg.h: Likewise.
	* sysvipc/sys/sem.h: Likewise.
	* sysvipc/sys/shm.h: Likewise.

	* sysdeps/alpha/bits/endian.h: Issue error message if the header is
	used directly.
	* sysdeps/alpha/bits/setjmp.h: Likewise.
	* sysdeps/alpha/fpu/bits/fenv.h: Likewise.
	* sysdeps/arm/bits/endian.h: Likewise.
	* sysdeps/arm/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/byteswap.h: Likewise.
	* sysdeps/generic/bits/confname.h: Likewise.
	* sysdeps/generic/bits/dirent.h: Likewise.
	* sysdeps/generic/bits/dlfcn.h: Likewise.
	* sysdeps/generic/bits/endian.h: Likewise.
	* sysdeps/generic/bits/fenv.h: Likewise.
	* sysdeps/generic/bits/huge_val.h: Likewise.
	* sysdeps/generic/bits/in.h: Likewise.
	* sysdeps/generic/bits/ioctl-types.h: Likewise.
	* sysdeps/generic/bits/ioctls.h: Likewise.
	* sysdeps/generic/bits/ipc.h: Likewise.
	* sysdeps/generic/bits/msq.h: Likewise.
	* sysdeps/generic/bits/poll.h: Likewise.
	* sysdeps/generic/bits/resource.h: Likewise.
	* sysdeps/generic/bits/sched.h: Likewise.
	* sysdeps/generic/bits/sem.h: Likewise.
	* sysdeps/generic/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/shm.h: Likewise.
	* sysdeps/generic/bits/sigaction.h: Likewise.
	* sysdeps/generic/bits/sigcontext.h: Likewise.
	* sysdeps/generic/bits/socket.h: Likewise.
	* sysdeps/generic/bits/stat.h: Likewise.
	* sysdeps/generic/bits/statfs.h: Likewise.
	* sysdeps/generic/bits/stdio_lim.h: Likewise.
	* sysdeps/generic/bits/termios.h: Likewise.
	* sysdeps/generic/bits/time.h: Likewise.
	* sysdeps/generic/bits/uio.h: Likewise.
	* sysdeps/generic/bits/utmp.h: Likewise.
	* sysdeps/generic/bits/utmpx.h: Likewise.
	* sysdeps/generic/bits/utsname.h: Likewise.
	* sysdeps/generic/bits/waitflags.h: Likewise.
	* sysdeps/generic/bits/waitstatus.h: Likewise.
	* sysdeps/gnu/bits/utmp.h: Likewise.
	* sysdeps/gnu/bits/utmpx.h: Likewise.
	* sysdeps/i386/bits/byteswap.h: Likewise.
	* sysdeps/i386/bits/endian.h: Likewise.
	* sysdeps/i386/bits/huge_val.h: Likewise.
	* sysdeps/i386/bits/setjmp.h: Likewise.
	* sysdeps/i386/fpu/bits/fenv.h: Likewise.
	* sysdeps/ieee754/bits/huge_val.h: Likewise.
	* sysdeps/m68k/bits/byteswap.h: Likewise.
	* sysdeps/m68k/bits/endian.h: Likewise.
	* sysdeps/m68k/bits/setjmp.h: Likewise.
	* sysdeps/m68k/fpu/bits/fenv.h: Likewise.
	* sysdeps/mach/hurd/alpha/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/bits/ioctls.h: Likewise.
	* sysdeps/mach/hurd/bits/stat.h: Likewise.
	* sysdeps/mach/hurd/hppa/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/i386/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/mips/bits/sigcontext.h: Likewise.
	* sysdeps/mips/bits/dlfcn.h: Likewise.
	* sysdeps/mips/bits/endian.h: Likewise.
	* sysdeps/mips/bits/setjmp.h: Likewise.
	* sysdeps/mips/dec/bits/endian.h: Likewise.
	* sysdeps/mips/mips64/bits/setjmp.h: Likewise.
	* sysdeps/mips/mipsel/bits/endian.h: Likewise.
	* sysdeps/mips/p40/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/fenv.h: Likewise.
	* sysdeps/powerpc/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc32/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/fpu/bits/fenv.h: Likewise.
	* sysdeps/sparc/sparc64/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc64/fpu/bits/fenv.h: Likewise.
	* sysdeps/unix/bsd/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/bits/waitflags.h: Likewise.
	* sysdeps/unix/bsd/bsd4.4/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/osf/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise.
	* sysdeps/unix/bsd/sun/m68k/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/resource.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/termios.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/mips/bits/sigcontext.h: Likewise.
	* sysdeps/unix/common/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/bits/utmp.h: Likewise.
	* sysdeps/unix/sysv/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/in.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/msq.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/resource.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sched.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sem.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigcontext.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/uio.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/endian.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/setjmp.h: Likewise.
	* sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/sysv4/i386/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/vax/bits/huge_val.h: Likewise.
	* sysdeps/vax/bits/setjmp.h: Likewise.
	* sysdeps/wordsize-32/bits/elfclass.h: Likewise.
	* sysdeps/wordsize-64/bits/elfclass.h: Likewise.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* libio/stdio.h: Correct comment of sys_nerr/sys_errlist

1997-11-25  Paul Eggert  <eggert@shade.twinsun.com>

	* strftime.c (strftime):
	No longer any need to undef or declare if emacs is defined.
	(my_strftime): When checking a -1 returned by mktime, don't blow up
	if localtime_r returns NULL.

1997-11-24  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* README.template: Fix spelling.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* configure.in: Enhance --enable-add-ons description a wee bit.

1997-11-24  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* glibcbug.in: Add more information of build environment and flags.

1997-11-23  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/getcwd.c: Recognize EOF from readdir and translate
	it into ENOENT.

30 files changed, 200 insertions, 199 deletions

diff --git a/bits/byteswap.h b/bits/byteswap.h
index 9404cc452e..04a5efe9f0 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -17,8 +17,9 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H	1
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
 
 /* Swap bytes in 16 bit value.  */
 #define __bswap_16(x) \
@@ -39,5 +40,3 @@
 	__r.__l[1] = __bswap_32 (__v.__l[0]);				      \
 	__r.__ll; })
 #endif
-
-#endif /* bits/byteswap.h */
diff --git a/bits/confname.h b/bits/confname.h
index 40228e11ed..4653887468 100644
--- a/bits/confname.h
+++ b/bits/confname.h
@@ -17,6 +17,10 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef _UNISTD_H
+# error "Never use <bits/confname.h> directly; include <unistd.h> instead."
+#endif
+
 /* Values for the NAME argument to `pathconf' and `fpathconf'.  */
 enum
   {
diff --git a/bits/dirent.h b/bits/dirent.h
index 2f7dca78aa..366cdf8ce2 100644
--- a/bits/dirent.h
+++ b/bits/dirent.h
@@ -1,5 +1,5 @@
 /* Directory entry structure `struct dirent'.  Stub version.
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,6 +17,10 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef _DIRENT_H
+# error "Never use <bits/dirent.h> directly; include <dirent.h> instead."
+#endif
+
 struct dirent
   {
     char d_name[1];		/* Variable length.  */
diff --git a/bits/dlfcn.h b/bits/dlfcn.h
index 79604fe8ff..7c33694018 100644
--- a/bits/dlfcn.h
+++ b/bits/dlfcn.h
@@ -17,8 +17,9 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#ifndef	_BITS_DLFCN_H
-#define	_BITS_DLFCN_H 1
+#ifndef _DLFCN_H
+# error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead."
+#endif
 
 /* The MODE argument to `dlopen' contains one of the following: */
 #define RTLD_LAZY	0x001	/* Lazy function call binding.  */
@@ -29,5 +30,3 @@
    the symbols of the loaded object and its dependencies are made
    visible as if the object were linked directly into the program.  */
 #define RTLD_GLOBAL	0x100
-
-#endif	/* bits/dlfcn.h */
diff --git a/bits/endian.h b/bits/endian.h
index 597f079a0f..45afd4ae47 100644
--- a/bits/endian.h
+++ b/bits/endian.h
@@ -6,4 +6,8 @@
    So if cross-compiling to a machine with a different byte order,
    the bits/endian.h file for that machine must exist.  */
 
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
 #error Machine byte order unknown.
diff --git a/bits/fenv.h b/bits/fenv.h
index f45deb07c1..c42540fa61 100644
--- a/bits/fenv.h
+++ b/bits/fenv.h
@@ -17,7 +17,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #ifndef _FENV_H
-#error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
 #endif
 
 
diff --git a/bits/huge_val.h b/bits/huge_val.h
index 8f137d1734..0c30c86f33 100644
--- a/bits/huge_val.h
+++ b/bits/huge_val.h
@@ -1,6 +1,6 @@
 /* Stub `HUGE_VAL' constant.
    Used by <stdlib.h> and <math.h> functions for overflow.
-   Copyright (C) 1992, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,7 +19,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #ifndef _MATH_H
-#error "Never use <bits/huge_val.h> directly; include <math.h> instead."
+# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
 #endif
 
 
diff --git a/bits/in.h b/bits/in.h
index 7241bd24c3..83d7ae6b10 100644
--- a/bits/in.h
+++ b/bits/in.h
@@ -18,8 +18,9 @@
 
 /* Generic version.  */
 
-#ifndef _NETINET_INBITS_H
-#define _NETINET_INBITS_H 1
+#ifndef _NETINET_IN_H
+# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
+#endif
 
 /* Link numbers.  */
 #define	IMPLINK_IP		155
@@ -55,10 +56,10 @@ struct ip_opts
 
 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
 struct ip_mreq
-{
-  struct in_addr imr_multiaddr;	/* IP multicast address of group */
-  struct in_addr imr_interface;	/* local IP address of interface */
-};
+  {
+    struct in_addr imr_multiaddr;	/* IP multicast address of group */
+    struct in_addr imr_interface;	/* local IP address of interface */
+  };
 
 /* IPV6 socket options.  */
 #define IPV6_ADDRFORM		1
@@ -80,5 +81,3 @@ struct ip_mreq
 #define IPV6_MULTICAST_LOOP	19
 #define IPV6_ADD_MEMBERSHIP	20
 #define IPV6_DROP_MEMBERSHIP	21
-
-#endif	/* netinet/inbits.h */
diff --git a/bits/ioctl-types.h b/bits/ioctl-types.h
index 1d5c8a002f..26283a0f10 100644
--- a/bits/ioctl-types.h
+++ b/bits/ioctl-types.h
@@ -1,5 +1,5 @@
 /* Structure types for pre-termios terminal ioctls.  Generic Unix version.
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,15 +17,11 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-/*
- * Never include this file directly; use <sys/ioctl.h> instead.
- */
-
-#ifndef _BITS_IOCTL_TYPES_H
-#define _BITS_IOCTL_TYPES_H 1
-
+#ifndef _SYS_IOCTL_H
+# error "Never use <bits/ioctl-types.h> directly; include <sys/ioctl.h> instead."
+#endif
 
-#if	defined(TIOCGETC) || defined(TIOCSETC)
+#if defined TIOCGETC || defined TIOCSETC
 /* Type of ARG for TIOCGETC and TIOCSETC requests.  */
 struct tchars
 {
@@ -41,7 +37,7 @@ struct tchars
   _IOT (_IOTS (char), 6, 0, 0, 0, 0)
 #endif
 
-#if	defined(TIOCGLTC) || defined(TIOCSLTC)
+#if defined TIOCGLTC || defined TIOCSLTC
 /* Type of ARG for TIOCGLTC and TIOCSLTC requests.  */
 struct ltchars
 {
@@ -70,7 +66,7 @@ struct sgttyb
 #define	_IOT_sgttyb	/* Hurd ioctl type field.  */ \
   _IOT (_IOTS (char), 6, _IOTS (short int), 1, 0, 0)
 
-#if	defined(TIOCGWINSZ) || defined(TIOCSWINSZ)
+#if defined TIOCGWINSZ || defined TIOCSWINSZ
 /* Type of ARG for TIOCGWINSZ and TIOCSWINSZ requests.  */
 struct winsize
 {
@@ -86,13 +82,13 @@ struct winsize
   _IOT (_IOTS (unsigned short int), 4, 0, 0, 0, 0)
 #endif
 
-#if	defined (TIOCGSIZE) || defined (TIOCSSIZE)
+#if defined TIOCGSIZE || defined TIOCSSIZE
 /* The BSD-style ioctl constructor macros use `sizeof', which can't be used
    in a preprocessor conditional.  Since the commands are always unique
    regardless of the size bits, we can safely define away `sizeof' for the
    purpose of the conditional.  */
 #  define sizeof(type) 0
-#  if defined (TIOCGWINSZ) && TIOCGSIZE == TIOCGWINSZ
+#  if defined TIOCGWINSZ && TIOCGSIZE == TIOCGWINSZ
 /* Many systems that have TIOCGWINSZ define TIOCGSIZE for source
    compatibility with Sun; they define `struct ttysize' to have identical
    layout as `struct winsize' and #define TIOCGSIZE to be TIOCGWINSZ
@@ -116,6 +112,3 @@ struct ttysize
 #  endif
 #  undef sizeof			/* See above.  */
 #endif
-
-
-#endif /* bits/ioctl-types.h */
diff --git a/bits/ioctls.h b/bits/ioctls.h
index 3b6178bfae..d3ecad9515 100644
--- a/bits/ioctls.h
+++ b/bits/ioctls.h
@@ -1 +1,5 @@
+#ifndef _SYS_IOCTL_H
+# error "Never use <bits/ioctls.h> directly; include <sys/ioctl.h> instead."
+#endif
+
 /* This space intentionally left blank.  */
diff --git a/bits/ipc.h b/bits/ipc.h
index a5ecbd90b7..58f419be1d 100644
--- a/bits/ipc.h
+++ b/bits/ipc.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
 
@@ -17,10 +17,9 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#ifndef _SYS_IPC_BUF_H
-
-#define _SYS_IPC_BUF_H	1
-#include <features.h>
+#ifndef _SYS_IPC_H
+# error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead."
+#endif
 
 #include <sys/types.h>
 
@@ -34,23 +33,16 @@
 #define IPC_SET		1		/* set `ipc_perm' options */
 #define IPC_STAT	2		/* get `ipc_perm' options */
 
-
-__BEGIN_DECLS
-
 /* Special key values.  */
 #define IPC_PRIVATE	((key_t) 0)	/* private key */
 
 
 /* Data structure used to pass permission information to IPC operations.  */
 struct ipc_perm
-{