Add distprep target to take some of the job of the release_prep script.

The latter updated accordingly. Also add `dist' and `distcheck' targets
to play with, but caveat packager.

Updated backend/bootstrap and backend/parser makefile to make them
marginally builddir aware and fix the usual set of things.

Add rule to automatically remake config.h dependent on config.h.in and
config.status. (Adopted from Autoconf manual and about every other
package.) On a good day we should now have a complete and accurate set
of dependencies throughout everything.

src/interfaces/Makefile

@@ -4,7 +4,7 @@
 #
 # Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/interfaces/Makefile,v 1.40 2000/06/28 18:29:35 petere Exp $
+# $Header: /cvsroot/pgsql/src/interfaces/Makefile,v 1.41 2000/07/19 16:30:06 petere Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -37,8 +37,8 @@ DIRS += python
 endif
 
 
-all install installdirs uninstall dep depend:
-	@for dir in $(DIRS); do $(MAKE) -C $$dir $@ || exit 1; done
+all install installdirs uninstall dep depend distprep:
+	@for dir in $(DIRS); do $(MAKE) -C $$dir $@ || exit; done
 
 clean:
 	@for dir in $(DIRS); do $(MAKE) -C $$dir $@; done

src/interfaces/ecpg/Makefile

@@ -2,7 +2,7 @@ subdir = src/interfaces/ecpg
 top_builddir = ../../..
 include ../../Makefile.global
 
-all install installdirs uninstall dep depend:
+all install installdirs uninstall dep depend distprep:
 	$(MAKE) -C include $@
 	$(MAKE) -C lib $@
 	$(MAKE) -C preproc $@

src/interfaces/ecpg/preproc/Makefile

@@ -35,6 +35,8 @@ $(srcdir)/pgc.c: pgc.l
 	$(LEX) $(LFLAGS) $<
 	mv lex.yy.c $@
 
+distprep: $(srcdir)/preproc.c $(srcdir)/preproc.h $(srcdir)/pgc.c
+
 install: all installdirs
 	$(INSTALL_PROGRAM) ecpg$(X) $(bindir)