dtlogin/dtgreet/dtchooser: get them to build

That was not fun.  There were a variety of issues.  It's needs
testing.

We use the new GENCPP for preprocessing the various scripts and config
files in config/

cde/programs/dtlogin/config/Makefile.am

@@ -0,0 +1,119 @@
+
+AM_CPPFLAGS = -DCDE_CONFIGURATION_TOP=$(CDE_CONFIGURATION_TOP) \
+            -DCDE_INSTALLATION_TOP=${prefix} \
+            -DCDE_LOGFILES_TOP=$(CDE_LOGFILES_TOP) \
+	    -DKORNSHELL=$(KSH)
+
+if FREEBSD
+AM_CPPFLAGS += -DFREEBSD
+endif
+
+CPP_TARGETS = \
+	0060.dtsysenv		Dtlogin \
+	Xaccess			Xconfig \
+	Xconfig.con		Xconfig.nc \
+	Xfailsafe		Xreset \
+	Xresources		Xresources.ive \
+	Xservers		Xservers.con \
+	Xservers.nc		Xsession \
+	Xsession.ive		Xsetup \
+	Xstartup		current.session \
+	display.current.session	display.home.session \
+	dtlslocale		dtprofile \
+	home.session
+
+BUILT_SOURCES = $(CPP_TARGETS)
+CLEANFILES = $(CPP_TARGETS)
+
+0060.dtsysenv: 0060.dtsysenv.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS)  $< > $@
+
+Dtlogin: Dtlogin.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xaccess: Xaccess.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xconfig: Xconfig.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xconfig.con: Xconfig.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xconfig.nc: Xconfig.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) -DNO_CONSOLE $< > $@
+
+Xfailsafe: Xfailsafe.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xreset: Xreset.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xresources: Xresources.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xresources.ive: Xresources.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) -DIVE $< > $@
+
+Xservers: Xservers.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xservers.con: Xservers.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xservers.nc: Xservers.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) -DNO_CONSOLE $< > $@
+
+Xsession: Xsession.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xsession.ive: Xsession.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) -DIVE $< > $@
+
+Xsetup: Xsetup.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+Xstartup: Xstartup.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+current.session: current.session.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+display.current.session: display.current.session.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+display.home.session: display.home.session.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+dtlslocale: dtlslocale.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+dtprofile: dtprofile.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+
+home.session: home.session.src
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+