configure/Makefiles: add checks for Xmu, Xext, and Xdmcp

We also remove sun pro specific options, and do some general cleanup
as well as remove hardcoded library refs like -lXm, -lXext, etc...

cde/programs/dtappbuilder/src/abmf/Makefile.am

@@ -4,14 +4,6 @@ ABINCLUDES = ../include
 
 EXTRA_DEFINES =  -D_POSIX_SOURCE=1
 
-if HPUX
-CCOPTIONS = -Ae
-endif
-
-if AIX
-CCOPTIONS = -qnoro
-endif
-
 if BSD
 UTILLIB = -lutil
 endif
@@ -30,11 +22,11 @@ noinst_DATA = dtcodegen.cat
 
 dtcodegen_CFLAGS = $(EXTRA_DEFINES) -I$(ABINCLUDES) -I../libABil
 
-dtcodegen_LDADD = -lXext  ../libABil/libABil.a  \
+dtcodegen_LDADD = ../libABil/libABil.a  \
 		  ../libABobjXm/libABobjXm.a  \
                   ../libABobj/libABobj.a ../libAButil/libAButil.a \
 		  $(LIBTERM) $(LIBSVC) $(LIBTT) $(LIBHELP) $(LIBXIN) \
-		  $(LIBWIDGET) $(UTILLIB) $(XTOOLLIB) -lm
+		  $(LIBWIDGET) $(UTILLIB) $(XTOOLLIB)
 
 
 dtcodegen_SOURCES = abmf.c                  args.c \