Add hacks that I use to test cross-builds (by building on

native and foreign architectures and comparing products).
They eliminate most of the differences caused by different
object directory paths, timestamping, and identification.

(Note WORLDTMP was renamed to ${OBJTREE}${.CURDIR}/tmp.)

Makefile.inc1

@@ -127,12 +127,12 @@ BUILD_ARCH!=	sysctl -n hw.machine_arch
 .error To cross-build, set TARGET_ARCH.
 .endif
 .endif
-.if ${MACHINE} == ${TARGET}
+.if ${MACHINE} == ${TARGET} && !defined(CROSS_BUILD_TESTING)
 OBJTREE=	${MAKEOBJDIRPREFIX}
 .else
 OBJTREE=	${MAKEOBJDIRPREFIX}/${TARGET}
 .endif
-WORLDTMP=	${OBJTREE}${.CURDIR}/${MACHINE_ARCH}
+WORLDTMP=	${OBJTREE}${.CURDIR}/tmp
 # /usr/games added for fortune which depend on strfile
 BPATH=		${WORLDTMP}/legacy/usr/sbin:${WORLDTMP}/legacy/usr/bin:${WORLDTMP}/legacy/usr/games
 XPATH=		${WORLDTMP}/usr/sbin:${WORLDTMP}/usr/bin:${WORLDTMP}/usr/games

tools/build/Makefile

@@ -23,4 +23,8 @@ INCS+=		nl_types.h
 SRCS=		dummy.c
 .endif
 
+.if defined(CROSS_BUILD_TESTING)
+SUBDIR=		cross-build
+.endif
+
 .include <bsd.lib.mk>

tools/build/cross-build/Makefile

@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+NO_OBJ=
+SCRIPTS=	date.sh hostname.sh
+BINDIR=		/usr/bin
+
+.include <bsd.prog.mk>

tools/build/cross-build/date.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+exec /bin/date -r0 "$@"

tools/build/cross-build/hostname.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+echo dummy