Add realpath.c and realpath.o to the Makefile for incorporation into the

libCom library, thereby satisfying the realpath() function calls found
in other parts of EPICS.  Note that realpath() is found in SUNOS, but not
HP-UX or OSF/1,... (and that realpath.c is empty after pre-processing on SUN).

src/libCom/Makefile.Unix

@@ -11,7 +11,8 @@ SRCS = \
 	../ezsSockSubr.c ../fdmgr.c ../freeListLib.c ../genSubr.c \
 	../genTaskSubr.c ../gpHashLib.c ../helpSubr.c ../memDebugLib.c \
 	../nextFieldSubr.c ../postfix.c ../sydSubr.c ../sydSubrCA.c \
-	../sydSubrCF.c ../sydSubrSSF.c ../tsSubr.c errSymTbl.c ../errInc.c
+	../sydSubrCF.c ../sydSubrSSF.c ../tsSubr.c errSymTbl.c ../errInc.c \
+	../realpath.c
 
 LIBOBJS = \
 	tsSubr.o arAccessLib.o arCSCheck.o arChanIO.o bfSubr.o bucketLib.o \
@@ -19,7 +20,7 @@ LIBOBJS = \
         envSubr.o errMtst.o errSymLib.o errSymTbl.o ezsSockSubr.o fdmgr.o \
         freeListLib.o genSubr.o genTaskSubr.o gpHashLib.o helpSubr.o \
         memDebugLib.o nextFieldSubr.o postfix.o sydSubr.o sydSubrCA.o \
-        sydSubrCF.o sydSubrSSF.o
+        sydSubrCF.o sydSubrSSF.o realpath.o
 
 LIBNAME = libCom.a