とりあえずこれで動いているようです。

hiraga@meis.sony.co.jp

diff -urP src/Configure.orig src/Configure
--- src/Configure.orig	Thu Jul  3 14:59:43 1997
+++ src/Configure	Tue Aug 19 12:53:40 1997
@@ -444,6 +444,12 @@
 	CFLAGS="$CFLAGS -DSVR4"
 	LIBS="$LIBS -lsocket -lnsl -lc"
 	;;
+    *-newsos6*)
+	OS='NEWS-OS Release 6'
+	CFLAGS="$CFLAGS -DSVR4"
+	LIBS="$LIBS -lsocket -lnsl"
+	DEF_WANTHSREGEX=yes
+	;;
     *-uts*)
 	OS='Amdahl UTS'
 	CFLAGS="$CFLAGS -Xa -eft -DUTS21"
diff -urP src/helpers/GuessOS.orig src/helpers/GuessOS
--- src/helpers/GuessOS.orig	Tue Jul  1 10:38:16 1997
+++ src/helpers/GuessOS	Tue Aug 19 12:56:21 1997
@@ -164,6 +164,10 @@
 	echo "${MACHINE}-whatever-sysv4"; exit 0
 	;;
 
+    NEWS-OS*:6.*)
+	echo "${MACHINE}-sony-newsos6"; exit 0
+	;;
+
     *:4*:R4*:m88k)
 	echo "${MACHINE}-whatever-sysv4"; exit 0
 	;;