Portability fixes found needed for SunOS 4.1.x:

SunOS has tas(), but not memmove or strerror, and its sprintf() doesn't
return int.  Also, older versions of GNU Make don't like rules with
empty left-hand sides...

src/Makefile.shlib

@@ -6,7 +6,7 @@
 # Copyright (c) 1998, Regents of the University of California
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/Makefile.shlib,v 1.4 1998/11/12 05:27:00 tgl Exp $
+#    $Header: /cvsroot/pgsql/src/Makefile.shlib,v 1.5 1998/11/30 00:30:03 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -171,8 +171,10 @@ else
 endif
 	$(RANLIB) $@
 
+ifneq ($(shlib),)
 $(shlib): $(OBJS)
 	$(LD) $(LDFLAGS_SL) -o $@ $(OBJS) $(SHLIB_LINK)
+endif
 
 # Rules to install regular and shared libraries
 

src/bin/psql/Makefile.in

@@ -7,7 +7,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/bin/psql/Attic/Makefile.in,v 1.13 1998/07/26 04:31:20 scrappy Exp $
+#    $Header: /cvsroot/pgsql/src/bin/psql/Attic/Makefile.in,v 1.14 1998/11/30 00:30:05 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -28,7 +28,7 @@ ifdef MULTIBYTE
 CFLAGS+= $(MBFLAGS)
 endif
 
-OBJS= psql.o stringutils.o @STRDUP@ 
+OBJS= psql.o stringutils.o @STRDUP@ @STRERROR2@
 
 all: submake psql
 

src/include/port/sunos4.h

 #define USE_POSIX_TIME
+#define HAS_TEST_AND_SET
+typedef unsigned char slock_t;
+
+/* sprintf() returns char *, not int, on SunOS 4.1.x */
+#define SPRINTF_CHAR
 
 #ifndef			BIG_ENDIAN
 #define			BIG_ENDIAN		4321

src/include/regex/utils.h

@@ -58,6 +58,6 @@ typedef unsigned char uch;
 #endif
 
 /* for old systems with bcopy() but no memmove() */
-#if !defined(HAVE_MEMMOVE)
+#if !defined(HAVE_MEMMOVE) && !defined(memmove)
 #define memmove(d, s, c)		bcopy(s, d, c)
 #endif