- adds several config-options to allow for turning off certain features

  like
  o UCLIBC_HAS_GNU_ERROR
  o UCLIBC_HAS_BSD_ERR
  o UCLIBC_HAS_PTY
  o UCLIBC_HAS_GETPT (1)
  o UCLIBC_SYSCALL_STUBS
  o UCLIBC_SYSCALL_STUB_WARNING
  o UCLIBC_LINUX_SPECIFIC (2)
  o UCLIBC_BSD_SPECIFIC (3)
  o UCLIBC_NTP_LEGACY (4)
  o UCLIBC_SV4_DEPRECATED (5)
  o UCLIBC_HAVE_REALTIME (6)
  o UCLIBC_HAVE_ADVANCED_REALTIME (7)
  o UCLIBC_HAVE_EPOLL (8)
  o UCLIBC_HAVE_XATTR (9)
  o UCLIBC_HAVE_PROFILING (10)

(1) make non-standard getpt optional and implement standard posix_openpt
(2) fstatfs(), inotify_*(), ioperm(), iopl(), madvise(), modify_ldt(),
    personality()
    ppoll(), setresuid()
(3) mincore(), getdomainname(), setdomainname()
(4) ntp_adjtime(), ntp_gettime() aliases
(5) ustat() [use statfs(2) in your code instead]
(6) All marked as "(REALTIME)" in SUSv3
(7) All marked as "(ADVANCED REALTIME)" in SUSv3
(8) epoll_create(), epoll_ctl(), epoll_wait()
(9) all Extended Attributes
(10) helpers for gcc's -finstrument-functions

- Fixes _dl_exit()
- Implements sleep(3) for !UCLIBC_HAVE_REALTIME
- Implements usleep(3) for !UCLIBC_HAVE_REALTIME
- adds #warning about incorrect posix_fadvise{,64}()
- removes unused and unwanted uselib()

Net outcome is that an allnoconfig with HAVE_SHARED is now about 88k instead 
of formerly 130k.

88 files changed, 892 insertions, 154 deletions

diff --git a/Makefile.in b/Makefile.in
index 1608dc7da..b593a64dc 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -221,6 +221,69 @@ ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 	# Remove this as it is only used internally.
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/tls.h
 endif
+ifneq ($(UCLIBC_HAS_GNU_ERROR),y)
+	# Remove error.h upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/error.h
+endif
+ifneq ($(UCLIBC_HAS_BSD_ERR),y)
+	# Remove err.h upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/err.h
+endif
+ifneq ($(UCLIBC_SUSV3_LEGACY),y)
+	# Remove timeb.h since the LEGACY ftime() was disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/timeb.h
+endif
+ifneq ($(UCLIBC_HAS_EPOLL),y)
+	# Remove epoll.h since epoll_*() were disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/epoll.h
+endif
+ifneq ($(UCLIBC_HAS_XATTR),y)
+	# Remove xattr.h since extended attributes were disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/xattr.h
+endif
+ifneq ($(UCLIBC_SV4_DEPRECATED),y)
+	# Remove ustst.h since ustat was disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/ustat.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/ustat.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/ustat.h
+endif
+ifneq ($(UCLIBC_HAS_PTY),y)
+	# Remove pty.h since PTY support was disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/pty.h
+endif
+ifneq ($(UCLIBC_LINUX_SPECIFIC),y)
+	# Remove linux-specific headers as requested
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/inotify.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/perm.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/personality.h
+endif
+ifneq ($(UCLIBC_SV4_DEPRECATED),y)
+	# Remove ustat.h since deprecated SV4 support was disabled upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/ustat.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/ustat.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/ustat.h
+endif
+ifeq ($(UCLIBC_HAS_REALTIME)$(UCLIBC_HAS_ADVANCED_REALTIME),)
+	# Remove SUSv-realtime related message-queue headers upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/mqueue.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/mqueue.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/mqueue.h
+endif
+ifneq ($(UCLIBC_HAS_REALTIME),y)
+	# Remove SUSv-realtime related headers upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sched.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/sched.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/sched.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/semaphore.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/semaphore.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/semaphore.h
+endif
+ifneq ($(UCLIBC_HAS_SOCKET),y)
+	# Remove socket related headers upon request
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/socket.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/socket.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/socketvar.h
+endif
 
 # Installs development library links.
 install_dev: install_headers
diff --git a/TODO b/TODO
index 3a8be1d46..fa5a9bbf5 100644
--- a/TODO
+++ b/TODO
@@ -144,6 +144,10 @@ Manuel's todo:
   e) Allow use of the older non-table-based ctype functions when using
      stub locale support. (smaller)
   f) __drand48_iterate should be void
+  g) alphasort vs. versionsort. The former seems to be SVID, the latter GNU
+     i.e. reverse to what we currently do. The latter is unimplemented.
+  h) ponder removal/configs to turn off: __xpg_*, bsd_signal, dysize,
+     getw/putw, utimes,
 
   2) Additional str{f|p}time issues.
   ----------------------------------
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 7372f260e..8ac002d41 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -357,7 +357,7 @@ config HAS_NO_THREADS
 	default n
 
 config UCLIBC_HAS_THREADS
-	bool "POSIX Threading Support"
+	bool "POSIX Threading support"
 	depends on !HAS_NO_THREADS
 	default y
 	help
@@ -399,6 +399,15 @@ config LINUXTHREADS_OLD
 	  the latest code from glibc, so it may be the only choice for the
 	  newer ports (like alpha/amd64/64bit arches and hppa).
 
+config UCLIBC_HAS_SYSLOG
+	bool "Syslog support"
+	default y
+	depends on UCLIBC_HAS_NETWORK_SUPPORT
+	select UCLIBC_HAS_SOCKET
+	help
+	  Support sending messages to the system logger.
+	  This requires socket-support.
+
 config UCLIBC_HAS_LFS
 	bool "Large File Support"
 	default y
@@ -493,7 +502,7 @@ config UCLIBC_SUSV3_LEGACY
 	help
 	  Enable this option if you want to have SuSv3 LEGACY functions
 	  in the library, else they are replaced by SuSv3 proposed macros.
-	  Currently applies to bcopy/bzero/bcmp/index/rindex.
+	  Currently applies to bcopy/bzero/bcmp/index/rindex/ftime.
 	  WARNING! ABI incompatibility.
 
 config UCLIBC_SUSV3_LEGACY_MACROS
@@ -538,17 +547,40 @@ config UCLIBC_HAS___PROGNAME
 
 	  If unsure, just answer N.
 
+config UCLIBC_HAS_PTY
+	bool "Support for pseudo-terminals"
+	default y
+	help
+	  This enables support for pseudo-terminals (see man 4 pts
+	  and man 7 pty).
+
+	  If unsure, just answer Y.
+
 config UNIX98PTY_ONLY
 	bool "Support only Unix 98 PTYs"
 	default y
+	depends on UCLIBC_HAS_PTY
 	help
 	  If you want to support only Unix 98 PTYs enable this.  Some older
 	  applications may need this disabled.  For most current programs,
 	  you can generally answer Y.
 
+config UCLIBC_HAS_GETPT
+	bool "Support getpt() (glibc-compat)"
+	default n
+	depends on UCLIBC_HAS_PTY
+	help
+	  Some packages may need getpt().
+	  All of those are non-standard and can be considered
+	  GNU/libc compatibility.
+	  Either use posix_openpt() or just open /dev/ptmx yourself.
+
+	  If unsure, just say N.
+
 config ASSUME_DEVPTS
 	bool "Assume that /dev/pts is a devpts or devfs file system"
 	default y
+	depends on UCLIBC_HAS_PTY
 	help
 	  Enable this if /dev/pts is on a devpts or devfs filesystem.  Both
 	  these filesystems automatically manage permissions on the /dev/pts
@@ -649,6 +681,8 @@ config UCLIBC_GRP_BUFFER_SIZE
 	  The value can be found using sysconf() with the _SC_GETGR_R_SIZE_MAX
 	  parameter.
 
+comment "Support various families of functions"
+
 config UCLIBC_LINUX_MODULE_24
 	bool "Linux kernel module functions"
 	default y
@@ -659,13 +693,250 @@ config UCLIBC_LINUX_MODULE_24
 
 	  Say N if you do not use kernel modules.
 
+config UCLIBC_LINUX_SPECIFIC
+	bool "Linux specific functions"
+	default y
+	help
+	  fstatfs(), inotify_*(), ioperm(), iopl(), madvise(), modify_ldt(),
+	  personality(), ppoll(), setresuid()
+
+config UCLIBC_HAS_GNU_ERROR
+	bool "Support GNU extensions for error-reporting"
+	default y
+	help
+	  Support for the GNU-specific error(), error_at_line(),
+	  void (* error_print_progname)(), error_message_count
+	  functions and variables.  Some GNU packages
+	  utilize these for extra useful output, but in general
+	  are not required.
+
+	  If unsure, just answer N.
+
+config UCLIBC_BSD_SPECIFIC
+	bool "BSD specific functions"
+	default y
+	help
+	  mincore(), getdomainname(), setdomainname()
+
+	  If unsure, say N.
+
+config UCLIBC_HAS_BSD_ERR
+	bool "BSD err functions"
+	default y
+	help
+	  These functions are non-standard BSD extensions.
+	  err(), errx(), warn(), warnx(), verr(), verrx(), vwarn(), vwarnx()
+
+	  If unsure, say N.
+
+config UCLIBC_HAS_OBSOLETE_BSD_SIGNAL
+	bool "BSD obsolete signal functions"
+	default n
+	help
+	  These  functions are provided as a compatibility interface for
+	  programs that make use of the historical System V signal API.
+	  This API is obsolete:
+	  new applications should use the POSIX signal API (sigaction(2),
+	  sigprocmask(2), etc.).
+	  Affected functions:
+
+	  sigset(), sighold(), sigrelse(), sigignore()
+
+	  If unsure, say N.
+
+config UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL
+	bool "SYSV obsolete signal functions"
+	default n
+	help
+	  Use of sysv_signal() should be avoided; use sigaction(2) instead.
+
+	  If unsure, say N.
+
+config UCLIBC_NTP_LEGACY
+	bool "ntp_*() aliases"
+	default n
+	help
+	  Provide legacy aliases for ntp functions:
+	  ntp_adjtime(), ntp_gettime()
+
+	  It is safe to say N here.
+
+config UCLIBC_SV4_DEPRECATED
+	bool "Enable SVr4 deprecated functions"
+	default n
+	help
+	  These functions are DEPRECATED in System V release 4.
+	  Say N unless you desparately need one of the functions below:
+
+	  ustat() [use statfs(2) in your code instead]
+
+config UCLIBC_HAS_REALTIME
+	bool "Realtime-related family of SUSv functions"
+	default y
+	# glitch in mq_{send,receive} currently forces this on
+	select UCLIBC_HAS_ADVANCED_REALTIME
+	help
+	  These functions are part of the Timers option and need not
+	  be available on all implementations.
+	  Includes AIO, message-queue, scheduler, semaphore functions:
+
+	  aio.h
+	  mqueue.h
+	  sched.h
+	  semaphore.h
+
+	  aio_cancel()
+	  aio_error()
+	  aio_fsync()
+	  aio_read()
+	  lio_listio()
+	  aio_return()
+	  aio_suspend()
+	  aio_write()
+	  clock_getres(), clock_gettime(), clock_settime()
+	  fdatasync()
+	  mlockall(), munlockall()
+	  mlock(), munlock()
+	  mq_close()
+	  mq_getattr()
+	  mq_notify()
+	  mq_open()
+	  mq_receive()
+	  mq_send()
+	  mq_setattr()
+	  mq_unlink()
+	  nanosleep()
+	  sched_getparam()
+	  sched_get_priority_max(), sched_get_priority_min()
+	  sched_getscheduler()
+	  sched_rr_get_interval()
+	  sched_setparam()
+	  sched_setscheduler()
+	  sem_close()
+	  sem_destroy()
+	  sem_getvalue()
+	  sem_init()
+	  sem_open()
+	  sem_post()
+	  sem_trywait(), sem_wait()
+	  sem_unlink()
+	  sigqueue()
+	  sigtimedwait(), sigwaitinfo()
+	  timer_create()
+	  timer_delete()
+	  timer_getoverrun(), timer_gettime(), timer_settime()
+
+config UCLIBC_HAS_ADVANCED_REALTIME
+	bool "Advanced realtime-related family of SUSv functions"
+	default y
+	depends on UCLIBC_HAS_REALTIME
+	help
+	  These functions are part of the Timers option and need not
+	  be available on all implementations.
+
+	  clock_getcpuclockid()
+	  clock_nanosleep()
+	  mq_timedreceive()
+	  mq_timedsend()
+	  posix_fadvise()
+	  posix_fallocate()
+	  posix_madvise()
+	  posix_memalign()
+	  posix_mem_offset()
+	  posix_spawnattr_destroy(), posix_spawnattr_init()
+	  posix_spawnattr_getflags(), posix_spawnattr_setflags()
+	  posix_spawnattr_getpgroup(), posix_spawnattr_setpgroup()
+	  posix_spawnattr_getschedparam(), posix_spawnattr_setschedparam()
+	  posix_spawnattr_getschedpolicy(), posix_spawnattr_setschedpolicy()
+	  posix_spawnattr_getsigdefault(), posix_spawnattr_setsigdefault()
+	  posix_spawnattr_getsigmask(), posix_spawnattr_setsigmask()
+	  posix_spawn_file_actions_addclose()
+	  posix_spawn_file_actions_adddup2()
+	  posix_spawn_file_actions_addopen()
+	  posix_spawn_file_actions_destroy()
+	  posix_spawn_file_actions_init()
+	  posix_spawn()
+	  posix_spawnp()
+	  posix_typed_mem_get_info()
+	  pthread_mutex_timedlock()
+	  sem_timedwait()
+
+#config UCLIBC_HAS_TERMIOS
+#	bool "termios functions"
+#	default y
+#	help
+#	  Get and set terminal attributes, line control, get and set baud
+#	  rate.
+#	  termios(), tcgetattr(), tcsetattr(), tcsendbreak(), tcdrain(),
+#	  tcflush(), tcflow(), cfmakeraw(), cfgetospeed(), cfgetispeed(),
+#	  cfsetispeed(), cfsetospeed(), cfsetspeed()
+#
+#	  If unsure, say Y.
+
+config UCLIBC_HAS_EPOLL
+	bool "epoll"
+	default y
+	help
+	  epoll_create(), epoll_ctl(), epoll_wait() functions.
+
+config UCLIBC_HAS_XATTR
+	bool "Extended Attributes"
+	default y
+	help
+	  Extended Attributes support.
+
+	  setxattr()
+	  lsetxattr()
+	  fsetxattr()
+	  getxattr()
+	  lgetxattr()
+	  fgetxattr()
+	  listxattr()
+	  llistxattr()
+	  flistxattr()
+	  removexattr()
+	  lremovexattr()
+	  fremovexattr()
+
+	  Say N unless you need support for extended attributes and the
+	  filesystems do actually support them.
+
+config UCLIBC_HAS_PROFILING
+	bool "Profiling support"
+	default y
+	help
+	  gcc's -finstrument-functions needs these.
+
+	  Most people can safely answer N.