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/dtfile/Makefile.am

@@ -18,7 +18,7 @@ dtfile_CPPFLAGS = -I./dtcopy -DSHAPE -D_ILS_MACROS -DSUN_PERF \
 
 dtfile_LDADD = dtcopy/sharedFuncs.o \
 	dtcopy/fsrtns.o \
-	$(DTCLIENTLIBS) $(TIRPCLIB) -lXm -lXext $(XTOOLLIB) 
+	$(DTCLIENTLIBS) $(TIRPCLIB) $(XTOOLLIB) 
 
 if OPENBSD
 dtfile_CPPFLAGS += -DFILE_MAP_OPTIMIZE
@@ -29,7 +29,6 @@ dtfile_CPPFLAGS += -DFILE_MAP_OPTIMIZE
 endif
 
 if SOLARIS
-dtfile_CFLAGS = -xF
 dtfile_LDADD += -lintl -lresolv
 endif
 

cde/programs/dtfile/dtcopy/Makefile.am

@@ -4,11 +4,7 @@ bin_PROGRAMS = dtfile_copy
 
 dtfile_copy_CFLAGS = -DSHAPE
 
-if SOLARIS
-dtfile_copy_CFLAGS += -xF
-endif
-
-dtfile_copy_LDADD = @DTCLIENTLIBS@ -lXm $(TIRPCLIB) $(XTOOLLIB)
+dtfile_copy_LDADD = $(DTCLIENTLIBS) $(XTOOLLIB) $(TIRPCLIB) 
 
 dtfile_copy_SOURCES = main_dtcopy.c   copydialog.c    overwrtdialog.c dosync.c \
 		      fsrtns.c  utils.c  errordialog.c   sharedFuncs.c