* sysdeps/unix/sysv/linux/poll.c: Don't define as stub. Use
simulation of system call using select.
* sysdeps/unix/sysv/linux/signal.c: Use POSIX implementation.
* sysdeps/unix/sysv/linux/statbuf.h: Define _STAT_VER.
* sysdeps/unix/sysv/linux/i386/sigaction.c: Correct parameter
name usage (new->act, old->oact).
Correct asm statement because of gcc strangeness.
* sysdeps/i386/i586/strchr.S: Correct typos: cmp -> cmpb.
* sunrpc/clnt_perr.c: Remove declaration of sys_errlist. They
conflict with the ones in stdio.h.
* string/tester.c: %Z is no complete format. Change to %Zd.
* sysdeps/mach/hurd/symlink.c (__symlink): Ditto.
New macro.
(PSEUDO): Use it instead of SYSCALL_PIC_SETUP and jmp syscall_error.
* sysdeps/unix/sysv/linux/i386/sysdep.S (__syscall_error): Define
only #ifndef PIC.
* Makeconfig (built-program-cmd): New variable.
* sunrpc/Makefile (rpcgen-cmd): Use $(built-program-cmd).
* time/Makefile (zic-cmd): Likewise.
* hurd/Makefile (user-interfaces): Add hurd/exec_startup.
* sunrpc/Makefile (install-lib): Variable removed.
(rpcsvc-objs): Variable removed.
(extra-objs): Don't include $(rpcsvc-objs).
(extra-libs): New variable, contains librpcsvc.
(librpcsvc-routines): New variable.
(librpcsvc-inhibit-o): New variable, contains .so.
(omit-deps): Set this to $(librpcsvc-routines).
($(objpfx)rpcgen): Don't use $(libc.a).
(lib, $(objpfx)librpcsvc.a): Targets removed.
* o-iterator.mk, extra-lib.mk: New files.
* Makerules (o-iterator): New variable.
[extra-libs]: Include extra-lib.mk to generate rules for each word
of $(extra-libs).
* Makefile (distribute): Add extra-lib.mk, o-iterator.mk.
(IMPLICIT_ONE, *_MAX_10_EXP_LOG): Macros removed; no longer needed.
* stdio/fpioconst.c, stdio/fpioconst.h: Don't use
LDBL_MAX_10_EXP_LOG; LAST_POW10 defines the maximal available
exponent.
