NetBSD re-synchronization of the source tree

This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0

lib/libc/softfloat/Makefile.inc

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.15 2013/04/30 01:42:04 matt Exp $
+#	$NetBSD: Makefile.inc,v 1.20 2015/04/08 13:16:37 martin Exp $
 
 SOFTFLOAT_BITS?=64
 .if defined(__MINIX)
@@ -7,13 +7,13 @@ SOFTFLOAT_BITS?=64
 .else
 .PATH:		${ARCHDIR}/softfloat \
 		${.CURDIR}/softfloat/bits${SOFTFLOAT_BITS} ${.CURDIR}/softfloat
-.endif
+.endif # defined(__MINIX)
 
 .if defined(__MINIX)
 CPPFLAGS+=	-I${ARCHDIR}/softfloat -I${LIBCDIR}/softfloat
 .else
 CPPFLAGS+=	-I${ARCHDIR}/softfloat -I${.CURDIR}/softfloat
-.endif
+.endif # defined(__MINIX)
 CPPFLAGS+=	-DSOFTFLOAT_FOR_GCC
 
 SRCS.softfloat= softfloat.c
@@ -32,18 +32,20 @@ SRCS.softfloat+=__aeabi_dcmpun.c __aeabi_fcmpun.c
 SRCS.softfloat+=eqsf2.c nesf2.c gtsf2.c gesf2.c ltsf2.c lesf2.c negsf2.c \
 		eqdf2.c nedf2.c gtdf2.c gedf2.c ltdf2.c ledf2.c negdf2.c \
 		eqtf2.c netf2.c gttf2.c getf2.c lttf2.c letf2.c negtf2.c \
-		nexf2.c gtxf2.c gexf2.c negxf2.c unordsf2.c unorddf2.c
+		nexf2.c gtxf2.c gexf2.c negxf2.c \
+		unordsf2.c unorddf2.c unordtf2.c
 .endif
 
 SRCS+=		${SRCS.softfloat}
 
 # XXX
-.if defined(HAVE_GCC) && ${HAVE_GCC} >= 45
-.if (${MACHINE_CPU} == "arm")
+.if defined(HAVE_GCC)
+. if (${LIBC_MACHINE_CPU} == "arm") && (${HAVE_GCC} == "45")
 # See doc/HACKS for more information.
-COPTS.softfloat.c+=	-Wno-enum-compare -fno-tree-vrp
-.elif (${MACHINE_CPU} == "mips" || \
-     ${MACHINE_CPU} == "sh3")
 COPTS.softfloat.c+=	-Wno-enum-compare
-.endif
+COPTS.softfloat.c+=	${${ACTIVE_CXX} == "gcc":? -fno-tree-vrp :}
+.elif (${LIBC_MACHINE_CPU} == "mips" || \
+     ${LIBC_MACHINE_CPU} == "sh3")
+COPTS.softfloat.c+=	-Wno-enum-compare
+. endif
 .endif

lib/libc/softfloat/softfloat-specialize

@@ -1,4 +1,4 @@
-/*	$NetBSD: softfloat-specialize,v 1.8 2013/01/10 08:16:10 matt Exp $	*/
+/*	$NetBSD: softfloat-specialize,v 1.9 2014/08/10 05:57:31 matt Exp $	*/
 
 /* This is a derivative work. */
 
@@ -140,8 +140,10 @@ Returns 1 if the single-precision floating-point value `a' is a signaling
 NaN; otherwise returns 0.
 -------------------------------------------------------------------------------
 */
-#if defined(SOFTFLOAT_FOR_GCC) && !defined(SOFTFLOATSPARC64_FOR_GCC) && \
-    !defined(SOFTFLOAT_M68K_FOR_GCC)
+#if defined(SOFTFLOAT_FOR_GCC) \
+    && !defined(SOFTFLOATAARCH64_FOR_GCC) \
+    && !defined(SOFTFLOATSPARC64_FOR_GCC) \
+    && !defined(SOFTFLOATM68K_FOR_GCC)
 static
 #endif
 flag float32_is_signaling_nan( float32 a )
@@ -240,8 +242,10 @@ Returns 1 if the double-precision floating-point value `a' is a signaling
 NaN; otherwise returns 0.
 -------------------------------------------------------------------------------
 */
-#if defined(SOFTFLOAT_FOR_GCC) && !defined(SOFTFLOATSPARC64_FOR_GCC) && \
-    !defined(SOFTFLOATM68K_FOR_GCC)
+#if defined(SOFTFLOAT_FOR_GCC) \
+    && !defined(SOFTFLOATAARCH64_FOR_GCC) \
+    && !defined(SOFTFLOATSPARC64_FOR_GCC) \
+    && !defined(SOFTFLOATM68K_FOR_GCC)
 static
 #endif
 flag float64_is_signaling_nan( float64 a )

lib/libc/softfloat/unordtf2.c

@@ -0,0 +1,32 @@
+/* $NetBSD: unordtf2.c,v 1.2 2014/01/30 19:11:41 matt Exp $ */
+
+/*
+ * Written by Richard Earnshaw, 2003.  This file is in the Public Domain.
+ */
+
+#include "softfloat-for-gcc.h"
+#include "milieu.h"
+#include "softfloat.h"
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: unordtf2.c,v 1.2 2014/01/30 19:11:41 matt Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef FLOAT128
+
+flag __unordtf2(float128, float128);
+
+flag
+__unordtf2(float128 a, float128 b)
+{
+	/*
+	 * The comparison is unordered if either input is a NaN.
+	 * Test for this by comparing each operand with itself.
+	 * We must perform both comparisons to correctly check for
+	 * signalling NaNs.
+	 */
+	return 1 ^ (float128_eq(a, a) & float128_eq(b, b));
+}
+
+#endif /* FLOAT128 */