Reduce libstand Makefile duplication

Userboot's copy of the libstand Makefile had more extensive changes
compared to the one in sys/boot/libstand32, but it turns out these are
not intentional and we can just include lib/libstand/Makefile as done
for libstand32 in r293040.

Reviewed by:	imp, jhb
Tested by:	allanjude
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D4793

sys/boot/userboot/libstand/Makefile

@@ -1,136 +1,12 @@
 # $FreeBSD$
-# Originally from	$NetBSD: Makefile,v 1.21 1997/10/26 22:08:38 lukem Exp $
-#
-# Notes:
-# - We don't use the libc strerror/sys_errlist because the string table is
-#   quite large.
-#
 
-MAN=
-
-.include <bsd.own.mk>
-MK_SSP=		no
+.include <src.opts.mk>
 
 LIBSTAND_SRC=	${.CURDIR}/../../../../lib/libstand
-LIBC_SRC=	${LIBSTAND_SRC}/../libc
 
-.PATH:		${LIBSTAND_SRC}
-LIB=		stand
 INTERNALLIB=
-MK_PROFILE=	no
-NO_PIC=
+INCS=
+MAN=
+.PATH:	${LIBSTAND_SRC}
 
-WARNS?=		0
-
-# standalone components and stuff we have modified locally
-SRCS+=	gzguts.h zutil.h __main.c assert.c bcd.c bswap.c environment.c getopt.c gets.c \
-	globals.c pager.c printf.c strdup.c strerror.c strtol.c strtoul.c random.c \
-	sbrk.c twiddle.c zalloc.c zalloc_malloc.c
-
-# private (pruned) versions of libc string functions
-SRCS+=	strcasecmp.c
-
-.PATH: ${LIBC_SRC}/net
-
-SRCS+= ntoh.c
-
-# string functions from libc
-.PATH: ${LIBC_SRC}/string
-.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "powerpc" || \
-	${MACHINE_CPUARCH} == "sparc64" || ${MACHINE_CPUARCH} == "amd64" || \
-	${MACHINE_CPUARCH} == "arm"
-SRCS+=	bcmp.c bcopy.c bzero.c ffs.c memccpy.c memchr.c memcmp.c memcpy.c \
-	memmove.c memset.c qdivrem.c strcat.c strchr.c strcmp.c strcpy.c \
-	strcspn.c strlen.c strncat.c strncmp.c strncpy.c strpbrk.c \
-	strrchr.c strsep.c strspn.c strstr.c strtok.c swab.c
-.endif
-.if ${MACHINE_CPUARCH} == "arm"
-.PATH: ${LIBC_SRC}/arm/gen
-SRCS+= divsi3.S
-.endif
-.if ${MACHINE_CPUARCH} == "powerpc"
-.PATH: ${LIBC_SRC}/quad
-SRCS+=	ashldi3.c ashrdi3.c
-.PATH: ${LIBC_SRC}/powerpc/gen
-SRCS+=	syncicache.c
-.endif
-
-# uuid functions from libc
-.PATH: ${LIBC_SRC}/uuid
-SRCS+= uuid_equal.c uuid_is_nil.c
-
-# _setjmp/_longjmp
-.if ${MACHINE_CPUARCH} == "amd64"
-.PATH: ${LIBSTAND_SRC}/amd64
-.elif ${MACHINE_ARCH} == "powerpc64"
-.PATH: ${LIBSTAND_SRC}/powerpc
-.else
-.PATH: ${LIBSTAND_SRC}/${MACHINE_CPUARCH}
-.endif
-SRCS+=	_setjmp.S
-
-# decompression functionality from libbz2
-# NOTE: to actually test this functionality after libbz2 upgrade compile
-# loader(8) with LOADER_BZIP2_SUPPORT defined
-.PATH: ${LIBSTAND_SRC}/../../contrib/bzip2
-CFLAGS+= -DBZ_NO_STDIO -DBZ_NO_COMPRESS
-SRCS+=	libstand_bzlib_private.h
-
-.for file in bzlib.c crctable.c decompress.c huffman.c randtable.c
-SRCS+=	_${file}
-CLEANFILES+=	_${file}
-
-_${file}: ${file}
-	sed "s|bzlib_private\.h|libstand_bzlib_private.h|" \
-	    ${.ALLSRC} > ${.TARGET}
-.endfor
-
-CLEANFILES+= libstand_bzlib_private.h
-libstand_bzlib_private.h: bzlib_private.h
-	sed -e 's|<stdlib.h>|"stand.h"|' \
-		${.ALLSRC} > ${.TARGET}
-
-# decompression functionality from libz
-.PATH: ${LIBSTAND_SRC}/../libz
-CFLAGS+=-DHAVE_MEMCPY -I${LIBSTAND_SRC}/../libz
-SRCS+=	adler32.c crc32.c libstand_zutil.h libstand_gzguts.h
-
-.for file in infback.c inffast.c inflate.c inftrees.c zutil.c
-SRCS+=	_${file}
-CLEANFILES+=	_${file}
-
-_${file}: ${file}
-	sed -e "s|zutil\.h|libstand_zutil.h|" \
-	    -e "s|gzguts\.h|libstand_gzguts.h|" \
-	    ${.ALLSRC} > ${.TARGET}
-.endfor
-
-# depend on stand.h being able to be included multiple times
-.for file in zutil.h gzguts.h
-CLEANFILES+= libstand_${file}
-libstand_${file}: ${file}
-	sed -e 's|<fcntl.h>|"stand.h"|' \
-	    -e 's|<stddef.h>|"stand.h"|' \
-	    -e 's|<string.h>|"stand.h"|' \
-	    -e 's|<stdio.h>|"stand.h"|' \
-	    -e 's|<stdlib.h>|"stand.h"|' \
-	    ${.ALLSRC} > ${.TARGET}
-.endfor
-
-# io routines
-SRCS+=	closeall.c dev.c ioctl.c nullfs.c stat.c \
-	fstat.c close.c lseek.c open.c read.c write.c readdir.c
-
-# network routines
-SRCS+=	arp.c ether.c inet_ntoa.c in_cksum.c net.c udp.c netif.c rpc.c
-
-# network info services:
-SRCS+=	bootp.c rarp.c bootparam.c
-
-# boot filesystems
-SRCS+=	ufs.c nfs.c cd9660.c tftp.c gzipfs.c bzipfs.c
-SRCS+=	dosfs.c ext2fs.c
-SRCS+=	splitfs.c
-
-.include <bsd.stand.mk>
-.include <bsd.lib.mk>
+.include "${LIBSTAND_SRC}/Makefile"