Update.cvs/libc-ud-970326cvs/libc-970329cvs/libc-970328cvs/libc-970327

1997-03-27 02:28  Ulrich Drepper  <drepper@cygnus.com>

	* gmon/gmon.c (monstartup): Mark all messages.
	(write_call_graph): Rewrite to use larger I/O vector for writev
	call to reduce syscall overhead.
	(write_bb_counts): Simplify writev handling.

	* inet/rexec.c: Make string parameters `const'.
	* resolv/netdb.h: Add prototypes for rcmd, rexec, ruserok, and
	rresvport.

	* math/Makefile: Don't define CFLAGS-* macros to prevent inlining
	in libm-test.
	* math/libm-test.c (this_does_nothing): Remove functions.  It's
	notuseful on any platform but ix86.
	(inverse_func_pair_test): Don't use this_does_nothing.  Use
	memory reference.
	(identities1_test): Likewise.
	(identities2_test): Likewise.
	(identities3_test): Likewise.
	(basic_test): Likewise.
	Patch by Andreas Schwab.
	(BUILD_COMPLEX): New macro.  Create complex number from real and
	imaginary parts.  This works around bugs/inefficiencies in current
	gcc.
	(cexp_test): Use BUILD_COMPLEX.  Add more tests.

	* nss/nsswitch.c: Fix typo.

	* posix/glob.h: Add declaration for glob_pattern_p.
	* posix/glob.c: Rename glob_pattern_p to __glob_pattern_p and
	make glob_pattern_p a weak alias.  This function is used in other
	packages (e.g. bash).

	* signal/Makefile (routines): Add sigisempty, sigandset, and
	sigorset.
	* signal/signal.h: Add prototypes for sigisempty, sigandset, and
	sigorset.
	* signal/sigisempty.c: New file.
	* signal/sigandset.c: New file.
	* signal/sigorset.c: New file.
	* sysdeps/generic/sigset.h: Define __sigisemptyset, __sigandset,
	and __sigorset.
	* sysdeps/unix/sysv/linux/sigset.h: Likewise.

	* stdlib/strtod.c: Handle `n-char-sequence' in NaN parsing.  It
	determines the bits in the mantissa part of the NaN.
	* stdlib/strtof.c: Define SET_MANTISSA for float type.
	* wcsmbs/wcstof.c: Define SET_MANTISSA for float type.
	* stdlib/strtold.c: Define SET_MANTISSA for long double type.
	* wcsmbs/wcstold.c: Define SET_MANTISSA for long double type.

	* sysdeps/libm-ieee754/s_cexp.c: Use explicit assignment to
	complex number components.  Some more corrects for special cases.
	* sysdeps/libm-ieee754/s_cexpf.c: Likewise.
	* sysdeps/libm-ieee754/s_cexpl.c: Likewise.

	* sysdeps/sparc/elf/start.S: Remove as per request of Miguel de Icaza.

	* sysdeps/unix/sysv/linux/netinet/icmp.h: Remove since we have
	ip_icmp.h.  Reported by HJ Lu.

1997-03-25 03:50  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/Makefile (CFLAGS-rtld.c): Add -Wno-unused.

	* sysdeps/m68k/dl-machine.h (elf_machine_rela): Rewritten as for
	i386.
	(elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p,
	ELF_MACHINE_RELOC_NOPLT): Define.

1997-03-25 03:48  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* grp/grp.h: Include <stddef.h> only once.

1997-03-25 09:38  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/termbits.h (OXTABS): Don't define.
	* sysdeps/unix/sysv/linux/alpha/termbits.h (OXTABS): Likewise.

	* termios/sys/ttydefaults.h (TTYDEF_OFLAG): Use either OXTABS or
	TAB3, if one of them is defined.

1997-03-26 04:53  Ulrich Drepper  <drepper@cygnus.com>

	* posix/glob.c (next_brace_sub): Decrement depth counter when '}'
	is found.
	Patch by Dennis Henriksen <opus@flamingo.osrl.dk>.

1997-03-25  16:25  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* sunrpc/Makefile: Comment gccwarn out.
	* sunrpc/auth_none.c: Fix prototypes and parameters for compiling
	with enabled warnings.
	* sunrpc/auth_unix.c: Likewise.
	* sunrpc/authuxprot.c: Likewise.
	* sunrpc/bindrsvprt.c: Likewise.
	* sunrpc/clnt_gen.c: Likewise.
	* sunrpc/clnt_perr.c: Likewise.
	* sunrpc/clnt_raw.c: Likewise.
	* sunrpc/clnt_simp.c: Likewise.
	* sunrpc/clnt_tcp.c: Likewise.
	* sunrpc/clnt_udp.c: Likewise.
	* sunrpc/get_myaddr.c: Likewise.
	* sunrpc/getrpcport.c: Likewise.
	* sunrpc/pm_getmaps.c: Likewise.
	* sunrpc/pm_getport.c: Likewise.
	* sunrpc/pmap_clnt.c: Likewise.
	* sunrpc/pmap_prot.c: Likewise.
	* sunrpc/pmap_prot2.c: Likewise.
	* sunrpc/pmap_rmt.c: Likewise.
	* sunrpc/rpc/auth.h: Likewise.
	* sunrpc/rpc/clnt.h: Likewise.
	* sunrpc/rpc/pmap_clnt.h: Likewise.
	* sunrpc/rpc/svc.h: Likewise.
	* sunrpc/rpc/svc_auth.h: Likewise.
	* sunrpc/rpc/types.h: Likewise.
	* sunrpc/rpc/xdr.h: Likewise.
	* sunrpc/rpc_clntout.c: Likewise.
	* sunrpc/rpc_cmsg.c: Likewise.
	* sunrpc/rpc_dtable.c: Likewise.
	* sunrpc/rpc_prot.c: Likewise.
	* sunrpc/svc.c: Likewise.
	* sunrpc/svc_auth.c: Likewise.
	* sunrpc/svc_authux.c: Likewise.
	* sunrpc/svc_raw.c: Likewise.
	* sunrpc/svc_run.c: Likewise.
	* sunrpc/svc_simple.c: Likewise.
	* sunrpc/svc_tcp.c: Likewise.
	* sunrpc/svc_udp.c: Likewise.
	* sunrpc/xdr.c: Likewise.
	* sunrpc/xdr_array.c: Likewise.
	* sunrpc/xdr_mem.c: Likewise.
	* sunrpc/xdr_rec.c: Likewise.
	* sunrpc/xdr_ref.c: Likewise.
	* sunrpc/xdr_stdio.c: Likewise.

1997-03-25 13:39  Ulrich Drepper  <drepper@cygnus.com>

	* math/libm-test.c (log2_test): Compile this function and call it.
	(exp2_test): Likewise, but check whether function really exists
	before testing.

	* math/Makefile (libm-calls): Add s_log2 and s_exp2.

1997-03-25 04:50  Ulrich Drepper  <drepper@cygnus.com>

	Implement exp2 function.
	* sysdeps/libm-i387/s_exp2.S: New file.
	* sysdeps/libm-i387/s_exp2f.S: New file.
	* sysdeps/libm-i387/s_exp2l.S: New file.

	Implement log2 function.
	* sysdeps/libm-i387/s_log2.S: New file.
	* sysdeps/libm-i387/s_log2f.S: New file.
	* sysdeps/libm-i387/s_log2l.S: New file.
	* sysdeps/libm-ieee754/s_log2.c: New file.
	* sysdeps/libm-ieee754/s_log2f.c: New file.
	* sysdeps/stub/s_log2.c: New file.  Stub version.

19 files changed, 670 insertions, 228 deletions

diff --git a/sysdeps/generic/sigset.h b/sysdeps/generic/sigset.h
index a137d428c3..6f4ea0e5a8 100644
--- a/sysdeps/generic/sigset.h
+++ b/sysdeps/generic/sigset.h
@@ -1,5 +1,5 @@
 /* __sig_atomic_t, __sigset_t, and related definitions.  Generic/BSD version.
-   Copyright (C) 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1991, 1992, 1994, 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
@@ -48,6 +48,14 @@ typedef unsigned long int __sigset_t;
 #define	__sigemptyset(set)	((*(set) = (__sigset_t) 0), 0)
 #define	__sigfillset(set)	((*(set) = ~(__sigset_t) 0), 0)
 
+#ifdef _GNU_SOURCE
+# define __sigisemptyset(set)	(*(set) == (__sigset_t) 0)
+# define __sigandset(dest, left, right) \
+				((*(set) = (*(left) & *(right))), 0)
+# define __sigorset(dest, left, right) \
+				((*(set) = (*(left) | *(right))), 0)
+#endif
+
 /* These functions needn't check for a bogus signal number -- error
    checking is done in the non __ versions.  */
 
diff --git a/sysdeps/libm-i387/s_exp2.S b/sysdeps/libm-i387/s_exp2.S
new file mode 100644
index 0000000000..1afacf58cd
--- /dev/null
+++ b/sysdeps/libm-i387/s_exp2.S
@@ -0,0 +1,38 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for exp2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+ENTRY(__exp2)
+	fldl	4(%esp)
+/* I added the following ugly construct because exp(+-Inf) resulted
+   in NaN.  The ugliness results from the bright minds at Intel.
+   For the i686 the code can be written better.
+   -- drepper@cygnus.com.  */
+	fxam				/* Is NaN or +-Inf?  */
+	fstsw	%ax
+	movb	$0x45, %dh
+	andb	%ah, %dh
+	cmpb	$0x05, %dh
+	je	1f			/* Is +-Inf, jump.  */
+	fld	%st
+	frndint				/* int(x) */
+	fsubr	%st,%st(1)		/* fract(x) */
+	fxch
+	f2xm1				/* 2^(fract(x)) - 1 */
+	fld1
+	faddp				/* 2^(fract(x)) */
+	fscale				/* e^x */
+	fstp	%st(1)
+	ret
+
+1:	testl	$0x200, %eax		/* Test sign.  */
+	jz	2f			/* If positive, jump.  */
+	fstp	%st
+	fldz				/* Set result to 0.  */
+2:	ret
+END (__exp2)
+weak_alias (__exp2, exp2)
diff --git a/sysdeps/libm-i387/s_exp2f.S b/sysdeps/libm-i387/s_exp2f.S
new file mode 100644
index 0000000000..896583bf83
--- /dev/null
+++ b/sysdeps/libm-i387/s_exp2f.S
@@ -0,0 +1,38 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for exp2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+ENTRY(__exp2f)
+	flds	4(%esp)
+/* I added the following ugly construct because exp(+-Inf) resulted
+   in NaN.  The ugliness results from the bright minds at Intel.
+   For the i686 the code can be written better.
+   -- drepper@cygnus.com.  */
+	fxam				/* Is NaN or +-Inf?  */
+	fstsw	%ax
+	movb	$0x45, %dh
+	andb	%ah, %dh
+	cmpb	$0x05, %dh
+	je	1f			/* Is +-Inf, jump.  */
+	fld	%st
+	frndint				/* int(x) */
+	fsubr	%st,%st(1)		/* fract(x) */
+	fxch
+	f2xm1				/* 2^(fract(x)) - 1 */
+	fld1
+	faddp				/* 2^(fract(x)) */
+	fscale				/* e^x */
+	fstp	%st(1)
+	ret
+
+1:	testl	$0x200, %eax		/* Test sign.  */
+	jz	2f			/* If positive, jump.  */
+	fstp	%st
+	fldz				/* Set result to 0.  */
+2:	ret
+END (__exp2f)
+weak_alias (__exp2f, exp2f)
diff --git a/sysdeps/libm-i387/s_exp2l.S b/sysdeps/libm-i387/s_exp2l.S
new file mode 100644
index 0000000000..4b543d06f8
--- /dev/null
+++ b/sysdeps/libm-i387/s_exp2l.S
@@ -0,0 +1,38 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for exp2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+ENTRY(__exp2l)
+	fldt	4(%esp)
+/* I added the following ugly construct because exp(+-Inf) resulted
+   in NaN.  The ugliness results from the bright minds at Intel.
+   For the i686 the code can be written better.
+   -- drepper@cygnus.com.  */
+	fxam				/* Is NaN or +-Inf?  */
+	fstsw	%ax
+	movb	$0x45, %dh
+	andb	%ah, %dh
+	cmpb	$0x05, %dh
+	je	1f			/* Is +-Inf, jump.  */
+	fld	%st
+	frndint				/* int(x) */
+	fsubr	%st,%st(1)		/* fract(x) */
+	fxch
+	f2xm1				/* 2^(fract(x)) - 1 */
+	fld1
+	faddp				/* 2^(fract(x)) */
+	fscale				/* e^x */
+	fstp	%st(1)
+	ret
+
+1:	testl	$0x200, %eax		/* Test sign.  */
+	jz	2f			/* If positive, jump.  */
+	fstp	%st
+	fldz				/* Set result to 0.  */
+2:	ret
+END (__exp2l)
+weak_alias (__exp2l, exp2l)
diff --git a/sysdeps/libm-i387/s_log2.S b/sysdeps/libm-i387/s_log2.S
new file mode 100644
index 0000000000..4632c96f67
--- /dev/null
+++ b/sysdeps/libm-i387/s_log2.S
@@ -0,0 +1,59 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for use as log2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ *
+ * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>.
+ */
+
+#include <machine/asm.h>
+
+#ifdef __ELF__
+	.section .rodata
+#else
+	.text
+#endif
+	.align ALIGNARG(4)
+	ASM_TYPE_DIRECTIVE(one,@object)
+one:	.double 1.0
+	ASM_SIZE_DIRECTIVE(one)
+	/* It is not important that this constant is precise.  It is only
+	   a value which is known to be on the safe side for using the
+	   fyl2xp1 instruction.  */
+	ASM_TYPE_DIRECTIVE(limit,@object)
+limit:	.double 0.29
+	ASM_SIZE_DIRECTIVE(limit)
+
+
+#ifdef PIC
+#define MO(op) op##@GOTOFF(%edx)
+#else
+#define MO(op) op
+#endif
+
+	.text
+ENTRY(__log2)
+#ifdef PIC
+	call	1f
+1:	popl	%edx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %edx
+#endif
+	fldl	MO(one)
+	fldl	4(%esp)		// x : 1
+	fld	%st		// x : x : 1
+	fsub	%st(2), %st	// x-1 : x : 1
+	fld	%st		// x-1 : x-1 : x : 1
+	fabs			// |x-1| : x-1 : x : 1
+	fcompl	MO(limit)	// x-1 : x : 1
+	fnstsw			// x-1 : x : 1
+	andb	$0x45, %ah
+	jz	2f
+	fstp	%st(1)		// x-1 : 1
+	fyl2xp1			// log(x)
+	ret
+
+2:	fstp	%st(0)		// x : 1
+	fyl2x			// log(x)
+	ret
+END (__log2)
+weak_alias (__log2, log2)
diff --git a/sysdeps/libm-i387/s_log2f.S b/sysdeps/libm-i387/s_log2f.S
new file mode 100644
index 0000000000..bfdd0ef88e
--- /dev/null
+++ b/sysdeps/libm-i387/s_log2f.S
@@ -0,0 +1,59 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for use as log2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ *
+ * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>.
+ */
+
+#include <machine/asm.h>
+
+#ifdef __ELF__
+	.section .rodata
+#else
+	.text
+#endif
+	.align ALIGNARG(4)
+	ASM_TYPE_DIRECTIVE(one,@object)
+one:	.double 1.0
+	ASM_SIZE_DIRECTIVE(one)
+	/* It is not important that this constant is precise.  It is only
+	   a value which is known to be on the safe side for using the
+	   fyl2xp1 instruction.  */
+	ASM_TYPE_DIRECTIVE(limit,@object)
+limit:	.double 0.29
+	ASM_SIZE_DIRECTIVE(limit)
+
+
+#ifdef PIC
+#define MO(op) op##@GOTOFF(%edx)
+#else
+#define MO(op) op
+#endif
+
+	.text
+ENTRY(__log2f)
+#ifdef PIC
+	call	1f
+1:	popl	%edx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %edx
+#endif
+	fldl	MO(one)
+	flds	4(%esp)		// x : 1
+	fld	%st		// x : x : 1
+	fsub	%st(2), %st	// x-1 : x : 1
+	fld	%st		// x-1 : x-1 : x : 1
+	fabs			// |x-1| : x-1 : x : 1
+	fcompl	MO(limit)	// x-1 : x : 1
+	fnstsw			// x-1 : x : 1
+	andb	$0x45, %ah
+	jz	2f
+	fstp	%st(1)		// x-1 : 1
+	fyl2xp1			// log(x)
+	ret
+
+2:	fstp	%st(0)		// x : 1
+	fyl2x			// log(x)
+	ret
+END (__log2f)
+weak_alias (__log2f, log2f)
diff --git a/sysdeps/libm-i387/s_log2l.S b/sysdeps/libm-i387/s_log2l.S
new file mode 100644
index 0000000000..184981c4bb
--- /dev/null
+++ b/sysdeps/libm-i387/s_log2l.S
@@ -0,0 +1,59 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Adapted for use as log2 by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ *
+ * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>.
+ */
+
+#include <machine/asm.h>
+
+#ifdef __ELF__
+	.section .rodata
+#else
+	.text
+#endif
+	.align ALIGNARG(4)
+	ASM_TYPE_DIRECTIVE(one,@object)
+one:	.double 1.0
+	ASM_SIZE_DIRECTIVE(one)
+	/* It is not important that this constant is precise.  It is only
+	   a value which is known to be on the safe side for using the
+	   fyl2xp1 instruction.  */
+	ASM_TYPE_DIRECTIVE(limit,@object)
+limit:	.double 0.29
+	ASM_SIZE_DIRECTIVE(limit)
+
+
+#ifdef PIC
+#define MO(op) op##@GOTOFF(%edx)
+#else
+#define MO(op) op
+#endif
+
+	.text
+ENTRY(__log2l)
+#ifdef PIC
+	call	1f
+1:	popl	%edx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %edx
+#endif
+	fldl	MO(one)
+	fldt	4(%esp)		// x : 1
+	fld	%st		// x : x : 1
+	fsub	%st(2), %st	// x-1 : x : 1
+	fld	%st		// x-1 : x-1 : x : 1
+	fabs			// |x-1| : x-1 : x : 1
+	fcompl	MO(limit)	// x-1 : x : 1
+	fnstsw			// x-1 : x : 1
+	andb	$0x45, %ah
+	jz	2f
+	fstp	%st(1)		// x-1 : 1
+	fyl2xp1			// log(x)
+	ret
+
+2:	fstp	%st(0)		// x : 1
+	fyl2x			// log(x)
+	ret
+END (__log2l)
+weak_alias (__log2l, log2l)
diff --git a/sysdeps/libm-ieee754/s_cexpf.c b/sysdeps/libm-ieee754/s_cexpf.c
index 14cfb19766..261b18cb3a 100644
--- a/sysdeps/libm-ieee754/s_cexpf.c
+++ b/sysdeps/libm-ieee754/s_cexpf.c
@@ -31,13 +31,18 @@ __cexpf (__complex__ float x)
     {
       if (isfinite (__imag__ x))
 	{
-	  retval = __expf (__real__ x) * (__cosf (__imag__ x)
-					  + 1i * __sinf (__imag__ x));
+	  float exp_val = __expf (__real__ x);
+
+	  __real__ retval = exp_val * __cosf (__imag__ x);
+	  __imag__ retval = exp_val * __sinf (__imag__ x);
 	}
       else
-	/* If the imaginary part is +-inf or NaN and the real part is
-	   not +-inf the result is NaN + iNan.  */
-	retval = __nanf ("") + 1.0i * __nanf ("");
+	{
+	  /* If the imaginary part is +-inf or NaN and the real part
+	     is not +-inf the result is NaN + iNaN.  */
+	  __real__ retval = __nanf ("");
+	  __imag__ retval = __nanf ("");
+	}
     }
   else if (__isinff (__real__ x))
     {
@@ -46,17 +51,27 @@ __cexpf (__complex__ float x)
 	  if (signbit (__real__ x) == 0 && __imag__ x == 0.0)
 	    retval = HUGE_VALF;
 	  else
-	    retval = ((signbit (__real__ x) ? 0.0 : HUGE_VALF)
-		      * (__cosf (__imag__ x) + 1i * __sinf (__imag__ x)));
+	    {
+	      float value = signbit (__real__ x) ? 0.0 : HUGE_VALF;
+
+	      __real__ retval = value * __cosf (__imag__ x);
+	      __imag__ retval = value * __sinf (__imag__ x);
+	    }
+	}
+      else if (signbit (__real__ x) == 0)
+	{
+	  __real__ retval = HUGE_VALF;
+	  __imag__ retval = __nanf ("");
 	}
-      else if (signbit (__real__ x))
-	retval = HUGE_VALF + 1.0i * __nanf ("");
       else
 	retval = 0.0;
     }
   else
-    /* If the real part is NaN the result is NaN + iNan.  */
-    retval = __nanf ("") + 1.0i * __nanf ("");
+    {
+      /* If the real part is NaN the result is NaN + iNan.  */
+      __real__ retval = __nanf ("");
+      __imag__ retval = __nanf ("");
+    }
 
   return retval;
 }
diff --git a/sysdeps/libm-ieee754/s_cexpl.c b/sysdeps/libm-ieee754/s_cexpl.c
index 6b3d409158..779286f6b3 100644
--- a/sysdeps/libm-ieee754/s_cexpl.c
+++ b/sysdeps/libm-ieee754/s_cexpl.c
@@ -1,4 +1,4 @@
-/* Return value of complex exponential function for long double complex value.
+/* Return value of complex exponential function for float complex value.
    Copyright (C) 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -31,33 +31,48 @@ __cexpl (__complex__ long double x)
     {
       if (isfinite (__imag__ x))
 	{
-	  retval = __expl (__real__ x) * (__cosl (__imag__ x)
-					  + 1i * __sinl (__imag__ x));
+	  long double exp_val = __expl (__real__ x);
+
+	  __real__ retval = exp_val * __cosl (__imag__ x);
+	  __imag__ retval = exp_val * __sinl (__imag__ x);
 	}
       else
-	/* If the imaginary part is +-inf or NaN and the real part is
-	   not +-inf the result is NaN + iNan.  */
-	retval = __nanl ("") + 1.0i * __nanl ("");
+	{
+	  /* If the imaginary part is +-inf or NaN and the real part
+	     is not +-inf the result is NaN + iNaN.  */
+	  __real__ retval = __nanl ("");
+	  __imag__ retval = __nanl ("");
+	}
     }
   else if (__isinfl (__real__ x))
     {
-      if (isfinite (__imag x))
+      if (isfinite (__imag__ x))
 	{
 	  if (signbit (__real__ x) == 0 && __imag__ x == 0.0)
-	    retval = HUGE_VALL;
+	    retval = HUGE_VAL;
 	  else
-	    retval = ((signbit (__real__ x) ? 0.0 : HUGE_VALL)
-		      * (__cosl (__imag__ x) + 1i * __sinl (__imag__ x)));
+	    {
+	      long double value = signbit (__real__ x) ? 0.0 : HUGE_VALL;
+
+	      __real__ retval = value * __cosl (__imag__ x);
+	      __imag__ retval = value * __sinl (__imag__ x);
+	    }
+	}
+      else if (signbit (__real__ x) == 0)
+	{
+	  __real__ retval = HUGE_VALL;
+	  __imag__ retval = __nanl ("");
 	}
-      else if (signbit (__real__ x))
-	retval = HUGE_VALL + 1.0i * __nanl ("");
       else
 	retval = 0.0;
     }
   else
-    /* If the real part is NaN the result is NaN + iNan.  */
-    retval = __nanl ("") + 1.0i * __nanl ("");
+    {
+      /* If the real part is NaN the result is NaN + iNaN.  */
+      __real__ retval = __nanl ("");
+      __imag__ retval = __nanl ("");
+    }
 
   return retval;
 }
-weak_alias (__cexpl, cexpl)
+weak_alias (__cexp, cexp)
diff --git a/sysdeps/libm-ieee754/s_log2.c b/sysdeps/libm-ieee754/s_log2.c
new file mode 100644
index 0000000000..03a7deaa67
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_log2.c
@@ -0,0 +1,129 @@
+/* Adapted for log2 by Ulrich Drepper <drepper@cygnus.com>.
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/* __log2(x)
+ * Return the logarithm to base 2 of x
+ *
+ * Method :
+ *   1. Argument Reduction: find k and f such that
+ *			x = 2^k * (1+f),
+ *	   where  sqrt(2)/2 < 1+f < sqrt(2) .
+ *
+ *   2. Approximation of log(1+f).
+ *	Let s = f/(2+f) ; based on log(1+f) = log(1+s) - log(1-s)
+ *		 = 2s + 2/3 s**3 + 2/5 s**5 + .....,
+ *	     	 = 2s + s*R
+ *      We use a special Reme algorithm on [0,0.1716] to generate
+ * 	a polynomial of degree 14 to approximate R The maximum error
+ *	of this polynomial approximation is bounded by 2**-58.45. In
+ *	other words,
+ *		        2      4      6      8      10      12      14
+ *	    R(z) ~ Lg1*s +Lg2*s +Lg3*s +Lg4*s +Lg5*s  +Lg6*s  +Lg7*s
+ *  	(the values of Lg1 to Lg7 are listed in the program)
+ *	and
+ *	    |      2          14          |     -58.45
+ *	    | Lg1*s +...+Lg7*s    -  R(z) | <= 2
+ *	    |                             |
+ *	Note that 2s = f - s*f = f - hfsq + s*hfsq, where hfsq = f*f/2.
+ *	In order to guarantee error in log below 1ulp, we compute log
+ *	by
+ *		log(1+f) = f - s*(f - R)	(if f is not too large)
+ *		log(1+f) = f - (hfsq - s*(hfsq+R)).	(better accuracy)
+ *
+ *	3. Finally,  log(x) = k + log(1+f).
+ *			    = k+(f-(hfsq-(s*(hfsq+R))))
+ *
+ * Special cases:
+ *	log2(x) is NaN with signal if x < 0 (including -INF) ;
+ *	log2(+INF) is +INF; log(0) is -INF with signal;
+ *	log2(NaN) is that NaN with no signal.
+ *
+ * Constants:
+ * The hexadecimal values are the intended ones for the following
+ * constants. The decimal values may be used, provided that the
+ * compiler will convert from decimal to binary accurately enough
+ * to produce the hexadecimal values shown.
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const double
+#else
+static double
+#endif
+two54   =  1.80143985094819840000e+16,  /* 43500000 00000000 */
+Lg1 = 6.666666666666735130e-01,  /* 3FE55555 55555593 */
+Lg2 = 3.999999999940941908e-01,  /* 3FD99999 9997FA04 */
+Lg3 = 2.857142874366239149e-01,  /* 3FD24924 94229359 */
+Lg4 = 2.222219843214978396e-01,  /* 3FCC71C5 1D8E78AF */
+Lg5 = 1.818357216161805012e-01,  /* 3FC74664 96CB03DE */
+Lg6 = 1.531383769920937332e-01,  /* 3FC39A09 D078C69F */
+Lg7 = 1.479819860511658591e-01;  /* 3FC2F112 DF3E5244 */
+
+#ifdef __STDC__
+static const double zero   =  0.0;
+#else
+static double zero   =  0.0;
+#endif
+
+#ifdef __STDC__
+	double __log2(double x)
+#else
+	double __log2(x)
+	double x;
+#endif
+{
+	double hfsq,f,s,z,R,w,t1,t2,dk;
+	int32_t k,hx,i,j;
+	u_int32_t lx;
+
+	EXTRACT_WORDS(hx,lx,x);
+
+	k=0;
+	if (hx < 0x00100000) {			/* x < 2**-1022  */
+	    if (((hx&0x7fffffff)|lx)==0)
+		return -two54/zero;		/* log(+-0)=-inf */
+	    if (hx<0) return (x-x)/zero;	/* log(-#) = NaN */
+	    k -= 54; x *= two54; /* subnormal number, scale up x */
+	    GET_HIGH_WORD(hx,x);
+	}
+	if (hx >= 0x7ff00000) return x+x;
+	k += (hx>>20)-1023;
+	hx &= 0x000fffff;
+	i = (hx+0x95f64)&0x100000;
+	SET_HIGH_WORD(x,hx|(i^0x3ff00000));	/* normalize x or x/2 */
+	k += (i>>20);
+	dk = (double) k;
+	f = x-1.0;
+	if((0x000fffff&(2+hx))<3) {	/* |f| < 2**-20 */
+	    if(f==zero) return dk;
+	    R = f*f*(0.5-0.33333333333333333*f);
+	    return dk-(R-f);
+	}
+ 	s = f/(2.0+f);
+	z = s*s;
+	i = hx-0x6147a;
+	w = z*z;
+	j = 0x6b851-hx;
+	t1= w*(Lg2+w*(Lg4+w*Lg6));
+	t2= z*(Lg1+w*(Lg3+w*(Lg5+w*Lg7)));
+	i |= j;
+	R = t2+t1;
+	if(i>0) {
+	    hfsq=0.5*f*f;
+	    return dk-((hfsq-(s*(hfsq+R)))-f);
+	} else {
+	    return dk-((s*(f-R))-f);
+	}
+}
diff --git a/sysdeps/libm-ieee754/s_log2f.c b/sysdeps/libm-ieee754/s_log2f.c
new file mode 100644
index 0000000000..c204e2266a
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_log2f.c
@@ -0,0 +1,90 @@
+/* e_logf.c -- float version of e_log.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * adapted for log2 by Ulrich Drepper <drepper@cygnus.com>
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const float
+#else
+static float
+#endif
+two25 =    3.355443200e+07,	/* 0x4c000000 */
+Lg1 = 6.6666668653e-01,	/* 3F2AAAAB */
+Lg2 = 4.0000000596e-01,	/* 3ECCCCCD */
+Lg3 = 2.8571429849e-01, /* 3E924925 */
+Lg4 = 2.2222198546e-01, /* 3E638E29 */
+Lg5 = 1.8183572590e-01, /* 3E3A3325 */
+Lg6 = 1.5313838422e-01, /* 3E1CD04F */
+Lg7 = 1.4798198640e-01; /* 3E178897 */
+
+#ifdef __STDC__
+static const float zero   =  0.0;
+#else
+static float zero   =  0.0;
+#endif
+
+#ifdef __STDC__
+	float __log2f(float x)
+#else
+	float __log2f(x)
+	float x;
+#endif
+{
+	float hfsq,f,s,z,R,w,t1,t2,dk;
+	int32_t k,ix,i,j;
+
+	GET_FLOAT_WORD(ix,x);
+
+	k=0;
+	if (ix < 0x00800000) {			/* x < 2**-126  */
+	    if ((ix&0x7fffffff)==0)
+		return -two25/zero;		/* log(+-0)=-inf */
+	    if (ix<0) return (x-x)/zero;	/* log(-#) = NaN */
+	    k -= 25; x *= two25; /* subnormal number, scale up x */
+	    GET_FLOAT_WORD(ix,x);
+	}
+	if (ix >= 0x7f800000) return x+x;
+	k += (ix>>23)-127;
+	ix &= 0x007fffff;
+	i = (ix+(0x95f64<<3))&0x800000;
+	SET_FLOAT_WORD(x,ix|(i^0x3f800000));	/* normalize x or x/2 */
+	k += (i>>23);
+	dk = (float)k;
+	f = x-(float)1.0;
+	if((0x007fffff&(15+ix))<16) {	/* |f| < 2**-20 */
+	    if(f==zero) return dk;
+	    R = f*f*((float)0.5-(float)0.33333333333333333*f);
+	    return dk-(R-f);}
+	}
+ 	s = f/((float)2.0+f);
+	z = s*s;
+	i = ix-(0x6147a<<3);
+	w = z*z;
+	j = (0x6b851<<3)-ix;
+	t1= w*(Lg2+w*(Lg4+w*Lg6));
+	t2= z*(Lg1+w*(Lg3+w*(Lg5+w*Lg7)));
+	i |= j;
+	R = t2+t1;
+	if(i>0) {
+	    hfsq=(float)0.5*f*f;
+	    return dk-((hfsq-(s*(hfsq+R)))-f);
+	} else {
+	    return dk-((s*(f-R))-f);
+	}
+}
+weak_alias (__log2f, log2f)
diff --git a/sysdeps/m68k/Makefile b/sysdeps/m68k/Makefile
index dc502912bf..fc79d36804 100644
--- a/sysdeps/m68k/Makefile
+++ b/sysdeps/m68k/Makefile
@@ -32,5 +32,5 @@ CFLAGS-setjmp.c := -fno-omit-frame-pointer
 long-double-fcts = yes
 
 ifeq ($(subdir),elf)
-CFLAGS-rtld.c += -Wno-uninitialized
+CFLAGS-rtld.c += -Wno-uninitialized -Wno-unused
 endif
diff --git a/sysdeps/m68k/dl-machine.h b/sysdeps/m68k/dl-machine.h
index 0c9b6acb6d..d79ef25d81 100644
--- a/sysdeps/m68k/dl-machine.h
+++ b/sysdeps/m68k/dl-machine.h
@@ -184,9 +184,16 @@ _dl_start_user:
 	| Jump to the user's entry point.
 	jmp (%a4)");
 
+/* Nonzero iff TYPE describes a relocation that should
+   skip the executable when looking up the symbol value.  */
+#define elf_machine_lookup_noexec_p(type) ((type) == R_68K_COPY)
+
 /* Nonzero iff TYPE describes relocation of a PLT entry, so
    PLT entries should not be allowed to define the value.  */
-#define elf_machine_pltrel_p(type) ((type) == R_68K_JMP_SLOT)
+#define elf_machine_lookup_noplt_p(type) ((type) == R_68K_JMP_SLOT)
+
+/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
+#define ELF_MACHINE_RELOC_NOPLT	R_68K_JMP_SLOT
 
 /* The m68k never uses Elf32_Rel relocations.  */
 #define ELF_MACHINE_NO_REL 1
@@ -203,60 +210,50 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version)
 {
   Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
-  Elf32_Addr loadbase;
 
-  switch (ELF32_R_TYPE (reloc->r_info))
+  if (ELF32_R_TYPE (reloc->r_info) == R_68K_RELATIVE)
+    *reloc_addr = map->l_addr + reloc->r_addend;
+  else
     {
-    case R_68K_COPY:
-      loadbase = RESOLVE (&sym, version, DL_LOOKUP_NOEXEC);
-      memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
-      break;
-    case R_68K_GLOB_DAT:
-      loadbase = RESOLVE (&sym, version, 0);
-      *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
-      break;
-    case R_68K_JMP_SLOT:
-      loadbase = RESOLVE (&sym, version, DL_LOOKUP_NOPLT);
-      *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
-      break;
-    case R_68K_8:
-      loadbase = RESOLVE (&sym, version, 0);
-      *(char *) reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-			      + reloc->r_addend);
-      break;
-    case R_68K_16:
-      loadbase = RESOLVE (&sym, version, 0);
-      *(short *) reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-			       + reloc->r_addend);
-      break;
-    case R_68K_32:
-      loadbase = RESOLVE (&sym, version, 0);
-      *reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-		     + reloc->r_addend);
-      break;
-    case R_68K_RELATIVE:
-      *reloc_addr = map->l_addr + reloc->r_addend;
-      break;
-    case R_68K_PC8:
-      loadbase = RESOLVE (&sym, version, 0);
-      *(char *) reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-			      + reloc->r_addend - (Elf32_Addr) reloc_addr);
-      break;
-    case R_68K_PC16:
-      loadbase = RESOLVE (&sym, version, 0);
-      *(short *) reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-			       + reloc->r_addend - (Elf32_Addr) reloc_addr);
-      break;
-    case R_68K_PC32:
-      loadbase = RESOLVE (&sym, version, 0);
-      *reloc_addr = ((sym ? (loadbase + sym->st_value) : 0)
-		     + reloc->r_addend - (Elf32_Addr) reloc_addr);
-      break;
-    case R_68K_NONE:		/* Alright, Wilbur.  */
-      break;
-    default:
-      assert (! "unexpected dynamic reloc type");
-      break;
+      Elf32_Addr value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info));
+      if (sym)
+	value += sym->st_value;
+
+      switch (ELF32_R_TYPE (reloc->r_info))
+	{
+	case R_68K_COPY:
+	  memcpy (reloc_addr, (void *) value, sym->st_size);
+	  break;
+	case R_68K_GLOB_DAT:
+	case R_68K_JMP_SLOT:
+	  *reloc_addr = value;
+	  break;
+	case R_68K_8:
+	  *(char *) reloc_addr = value + reloc->r_addend;
+	  break;
+	case R_68K_16:
+	  *(short *) reloc_addr = value + reloc->r_addend;
+	  break;
+	case R_68K_32:
+	  *reloc_addr = value + reloc->r_addend;
+	  break;
+	case R_68K_PC8:
+	  *(char *) reloc_addr
+	    = value + reloc->r_addend - (Elf32_Addr) reloc_addr;
+	  break;
+	case R_68K_PC16:
+	  *(short *) reloc_addr
+	    = value + reloc->r_addend - (Elf32_Addr) reloc_addr;
+	  break;
+	case R_68K_PC32:
+	  *reloc_addr = value + reloc->r_addend - (Elf32_Addr) reloc_addr;
+	  break;
+	case R_68K_NONE:		/* Alright, Wilbur.  */
+	  break;
+	default:
+	  assert (! "unexpected dynamic reloc type");
+	  break;
+	}
     }
 }
 
diff --git a/sysdeps/sparc/elf/start.S b/sysdeps/sparc/elf/start.S
deleted file mode 100644
index db407d7bae..0000000000
--- a/sysdeps/sparc/elf/start.S
+++ /dev/null
@@ -1,112 +0,0 @@
-/* Startup code compliant to the ELF SPARC ABI.
-   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
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-/* This is the canonical entry point, usually the first thing in the text
-   segment.  The SVR4/SPARC ABI (NOTE: I don't actually have it) says that
-   when the entry point runs, most registers' values are unspecified,
-   except for:
-
-   %g1		Contains a function pointer to be registered with `atexit'.
-   		This is how the dynamic linker arranges to have DT_FINI
-		functions called for shared libraries that have been loaded
-		before this code runs.
-
-   %sp		The stack contains the arguments and environment:
-   		0(%sp)			argc
-		4(%sp)			argv[0]
-		...
-		(4*argc)(%sp)		NULL
-		(4*(argc+1))(%sp)	envp[0]
-		...
-					NULL
-*/
-
-	.text
-	.align 16
-	.global _start
-_start:
-	/* %g1 contains the address of the shared library termination
-	   function, which we will register with `atexit' to be called by
-	   `exit'.  I suspect that on some systems, and when statically
-	   linked, this will not be set by anything to any function
-	   pointer; hopefully it will be zero so we don't try to call
-	   random pointers.  */
-	orcc %g1, %g0, %o0	/* Move %g1 to %o0 while testing it.  */
-	be nofini
-
-	/* In delay slot: clear the frame pointer.  The ABI suggests this
-	   be done, to mark the outermost frame obviously.  */
-	clr %fp
-
-	/* Call atexit, argument was set in %o0 above.  */
-	call atexit
-	nop
-nofini:
-
-	/* We will use some local variables in registers below.  %g1 and
-	   the %oN registers are call-clobbered, so we can't just use them.  */
-#define ARGC	%l0
-#define ARGV	%l1
-#define ENVP	%l2
-#define TMP	%l3
-
-	/* Do essential libc initialization.  In statically linked
-	   programs under the GNU Hurd, this is what sets up the
-	   arguments on the stack for the code below.  */
-	call __libc_init_first
-	sethi %hi(_environ), TMP /* In delay slot: prepare to use &_environ. */
-
-	/* Extract the arguments and environment as encoded on the stack
-	   and save them in local variables.  */
-	ld [%sp + 64], ARGC	/* After the register save area, ARGC. */
-	add %sp, 64+4, ARGV	/* Next, the ARGV elements.  */
-	/* After ARGC words that are the ARGV elements, and a zero word,
-	   are the ENVP elements.  Do ENVP = &ARGV[ARGC + 1].  */
-	add ARGC, 1, ENVP
-	sll ENVP, 2, ENVP
-	add ARGV, ENVP, ENVP
-	/* Store ENVP in the global variable `_environ'.  */
-	ld [TMP + %lo(_environ)], ENVP
-
-	/* Call `_init', which is the entry point to our own `.init'
-	   section; and register with `atexit' to have `exit' call
-	   `_fini', which is the entry point to our own `.fini' section.  */
-	call _init
-	sethi %hi(_fini), TMP	/* In delay slot of call.  */
-	or TMP, %lo(_fini), %o0	/* Argument to atexit is &_fini.  */
-	call atexit
-	nop
-
-	/* Call the user's main function, and exit with its value.  */
-	mov ARGC, %o0
-	mov ARGV, %o1
-	call main
-	mov ENVP, %o2
-
-	call exit		/* This should never return.  */
-	nop
-	unimp 0			/* Crash if somehow it does return.  */
-
-/* Define a symbol for the first piece of initialized data.  */
-	.data
-	.global __data_start
-__data_start:
-	.long 0
-	.weak data_start
-	data_start = __data_start
diff --git a/sysdeps/stub/s_log2l.c b/sysdeps/stub/s_log2l.c
new file mode 100644
index 0000000000..cfa1a7d016
--- /dev/null
+++ b/sysdeps/stub/s_log2l.c
@@ -0,0 +1,11 @@
+#include <math.h>
+#include <stdio.h>
+
+long double
+__log2l (long double x)
+{
+  fputs ("__log2l not implemented\n", stderr);
+  return 0.0;
+}
+
+stub_warning (__log2l)
diff --git a/sysdeps/unix/sysv/linux/alpha/termbits.h b/sysdeps/unix/sysv/linux/alpha/termbits.h
index 743bb3d283..d0932c1cd7 100644
--- a/sysdeps/unix/sysv/linux/alpha/termbits.h
+++ b/sysdeps/unix/sysv/linux/alpha/termbits.h
@@ -112,10 +112,6 @@ struct termios
 #define   VT1	00200000
 #define XTABS	01000000 /* Hmm.. Linux/i386 considers this part of TABDLY.. */
 
-/* On Linux there is no OXTABS bit defined.  Take it as an alias for
-   XTABS.  */
-#define OXTABS	XTABS
-
 /* c_cflag bit meaning */
 #define CBAUD	0000037
 #define  B0	0000000		/* hang up */
diff --git a/sysdeps/unix/sysv/linux/netinet/icmp.h b/sysdeps/unix/sysv/linux/netinet/icmp.h
deleted file mode 100644
index f6b2d8ad94..0000000000
--- a/sysdeps/unix/sysv/linux/netinet/icmp.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* Copyright (C) 1991, 92, 93, 95, 96, 97 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
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#ifndef _NETINET_ICMP_H
-#define	_NETINET_ICMP_H 1
-
-#include <asm/types.h>
-#include <linux/icmp.h>
-
-#endif	/* netinet/icmp.h */
diff --git a/sysdeps/unix/sysv/linux/sigset.h b/sysdeps/unix/sysv/linux/sigset.h
index 752d13adff..62e668773c 100644
--- a/sysdeps/unix/sysv/linux/sigset.h
+++ b/sysdeps/unix/sysv/linux/sigset.h
@@ -54,16 +54,47 @@ typedef struct
 #define __sigword(sig)	(((sig) - 1) / (8 * sizeof (unsigned long int)))
 
 #if defined __GNUC__ && __GNUC__ >= 2
-#define __sigemptyset(set) \
+# define __sigemptyset(set) \
   (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
 		    sigset_t *__set = (set);				      \
 		    while (--__cnt >= 0) __set->__val[__cnt] = 0;	      \
 		    0; }))
-#define __sigfillset(set) \
+# define __sigfillset(set) \
   (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
 		    sigset_t *__set = (set);				      \
 		    while (--__cnt >= 0) __set->__val[__cnt] = ~0UL;	      \
 		    0; }))
+
+# ifdef _GNU_SOURCE
+/* The POSIX does not specify for handling the whole signal set in one
+   command.  This is often wanted and so we define three more functions
+   here.  */
+# define __sigisemptyset(set) \
+  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
+		    const sigset_t *__set = (set);			      \
+		    int __ret = __set->__val[--__cnt];			      \
+		    while (!__ret && --__cnt >= 0)			      \
+			__ret = __set->__val[__cnt];			      \
+		    __ret; }))
+# define __sigandset(dest, left, right) \
+  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
+		    sigset_t *__dest = (dest);				      \
+		    const sigset_t *__left = (left);			      \
+		    const sigset_t *__right = (right);			      \
+		    while (--__cnt >= 0)				      \
+		      __dest->__val[__cnt] = (__left->__val[__cnt]	      \
+					      & __right->__val[__cnt]);	      \
+		    0; }))
+# define __sigorset(dest, left, right) \
+  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
+		    sigset_t *__dest = (dest);				      \
+		    const sigset_t *__left = (left);			      \
+		    const sigset_t *__right = (right);			      \
+		    while (--__cnt >= 0)				      \
+		      __dest->__val[__cnt] = (__left->__val[__cnt]	      \
+					      | __right->__val[__cnt]);	      \
+		    0; }))
+# endif
 #endif
 
 /* These functions needn't check for a bogus signal number -- error
diff --git a/sysdeps/unix/sysv/linux/termbits.h b/sysdeps/unix/sysv/linux/termbits.h
index 91ba78b950..8224ac5403 100644
--- a/sysdeps/unix/sysv/linux/termbits.h
+++ b/sysdeps/unix/sysv/linux/termbits.h
@@ -105,10 +105,6 @@ struct termios
 #define   FF0	0000000
 #define   FF1	0100000
 
-/* On Linux there is no OXTABS bit defined.  Take it as an alias for
-   XTABS.  */
-#define OXTABS	XTABS
-
 /* c_cflag bit meaning */
 #define CBAUD	0010017
 #define  B0	0000000		/* hang up */