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/dtmail/MotifApp/Makefile.am

@@ -4,21 +4,6 @@ noinst_LIBRARIES = libMotifApp.a
 
 libMotifApp_a_CXXFLAGS = -I../include/MotifApp -I../include -I../include/utils 
 
-# FIXME - some of these aren't set and sould be by configure.ac
-#if SOLARIS
-
-#if USE_SPRO_V3
-#libMotifApp_a_CXXFLAGS += -noex -xO0 -USPRO_V2
-#endif
-
-#if DEBUGTREE
-#libMotifApp_a_CXXFLAGS += -xsb
-#endif
-#
-#libMotifApp_a_CXXFLAGS += -DMMAP_NORESERVE -DSPRO_V2
-
-#endif
-
 libMotifApp_a_SOURCES = Application.C           AskFirstCmd.C \
 			BasicComponent.C        BusyPixmap.C \
 			ButtonInterface.C       Cmd.C \
@@ -36,8 +21,3 @@ libMotifApp_a_SOURCES = Application.C           AskFirstCmd.C \
 			UndoCmd.C               WarnNoUndoCmd.C \
 			WorkingDialogManager.C
 
-if SOLARIS
-clean-local:
-	$(RM) -r .sb
-	$(RM) .make.state*
-endif

cde/programs/dtmail/dtmail/Makefile.am

@@ -7,7 +7,7 @@ dtmail_CXXFLAGS = -I../include -I../include/MotifApp -I../include/utils \
 		  -I$(srcdir)/lib -I../../dthelp -DRELEASE_NOTES \
 		  -DDTMAIL_TOOLTALK -DDTEDITOR
 
-dtmail_LDADD = ../libDtMail/libDtMail.a ../MotifApp/libMotifApp.a -lXm \
+dtmail_LDADD = ../libDtMail/libDtMail.a ../MotifApp/libMotifApp.a \
 		$(DTCLIENTLIBS) $(XTOOLLIB) $(TIRPCLIB)
 
 dtmail_SOURCES = AliasListUiItem.C               AlternatesListUiItem.C \

cde/programs/dtmail/libDtMail/Common/Makefile.am

@@ -6,7 +6,7 @@ libCommon_a_CXXFLAGS = -I../../include -I../../include/utils -I$(srcdir)/lib \
 		       -DDL_NOT_DYNAMIC -DUSE_SOCKSTREAM
 
 if SOLARIS
-libCommon_a_CXXFLAGS += -DMMAP_NORESERVE -DSPRO_V2
+libCommon_a_CXXFLAGS += -DMMAP_NORESERVE
 endif
 
 libCommon_a_SOURCES = APOPServer.C \

cde/programs/dtmail/libDtMail/RFC/Makefile.am

@@ -6,7 +6,7 @@ libRFC_a_CXXFLAGS = -I../Common -I../../include -I../../include/utils \
 		    -DTTLOCK_OFF
 
 if SOLARIS
-libRFC_a_CXXFLAGS += -DMMAP_NORESERVE -DSPRO_V2
+libRFC_a_CXXFLAGS += -DMMAP_NORESERVE
 endif
 
 libRFC_a_SOURCES = AliasExpand.C           MIMEBodyPart.C \