Automatic dependency tracking

The .DEFAULT rule in backend/Makefile is harmful -- removed.
Replace `::' rules by `:'.

GNUmakefile.in

 #
 # PostgreSQL top level makefile
 #
-# $Header: /cvsroot/pgsql/GNUmakefile.in,v 1.6 2000/06/28 18:29:11 petere Exp $
+# $Header: /cvsroot/pgsql/GNUmakefile.in,v 1.7 2000/07/16 14:50:28 petere Exp $
 #
 
 subdir =
@@ -30,9 +30,6 @@ distclean maintainer-clean:
 GNUmakefile: GNUmakefile.in $(top_builddir)/config.status
 	CONFIG_FILES=$@ CONFIG_HEADERS= ./config.status
 
-$(top_builddir)/config.status: $(top_srcdir)/configure
-	cd $(top_builddir) && ./config.status --recheck
-
 
 # These dependencies are risky because both the target and the sources
 # are in CVS and CVS doesn't preserve timestamps, thus leading to

configure.in

@@ -287,6 +287,18 @@ fi
 AC_DEFINE_UNQUOTED(PG_VERSION_STR, ["PostgreSQL $VERSION on $host, compiled by $cc_string"], [A canonical string containing the version number, platform, and C compiler])
 
 
+#
+# Automatic dependency tracking
+#
+AC_ARG_ENABLE(depend, [  --enable-depend         turn on automatic dependency tracking],
+[
+  if test x"$enableval" = x"yes" ; then
+    autodepend=yes
+  fi
+])
+AC_SUBST(autodepend)
+
+
 # --enable-debug adds -g to compiler flags
 # --disable-debug will forcefully remove it
 AC_MSG_CHECKING(setting debug compiler flag)

contrib/Makefile

 #
 # The PostgreSQL contrib tree Makefile
 #
-# $Header: /cvsroot/pgsql/contrib/Makefile,v 1.6 2000/07/09 13:12:57 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/Makefile,v 1.7 2000/07/16 14:50:29 petere Exp $
 #
 
 subdir = contrib
@@ -29,7 +29,7 @@ WANTED_DIRS =	array		\
 		vacuumlo	
 	#	odbc
 
-all .DEFAULT:
+all install installdirs uninstall clean distclean maintainer-clean:
 	for dir in $(WANTED_DIRS); do \
 	    if [ -e $$dir/Makefile ]; then \
 		$(MAKE) -C $$dir $@ ; \

contrib/odbc/Makefile

@@ -18,7 +18,7 @@ TARGETS= $(TARGETS_7)
 
 CLEANFILES+= $(TARGETS) $(TARGETS_PRE7)
 
-all:: $(TARGETS)
+all: $(TARGETS)
 
 install: all
 ifneq ($(filter odbc$(DLSUFFIX), $(TARGETS)),)

doc/Makefile

@@ -8,7 +8,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/doc/Makefile,v 1.16 2000/07/09 13:13:55 petere Exp $
+#    $Header: /cvsroot/pgsql/doc/Makefile,v 1.17 2000/07/16 14:50:32 petere Exp $
 #
 #----------------------------------------------------------------------------
 
@@ -40,22 +40,22 @@ TARGETS= $(MODULES:%=%.html)
 .PRECIOUS: postgres.tex postgres.dvi
 .PHONY: beforeinstall install all clean distclean
 
-beforeinstall::
+beforeinstall:
 	-@if [ ! -d $(PGDOCS) ]; then mkdir $(PGDOCS); fi
 
-install::
+install:
 	$(MAKE) all
 	$(MAKE) man
 
-all:: beforeinstall $(MODULES)
+all: beforeinstall $(MODULES)
 
-clean::
+clean:
 	rm -rf $(MODULES)
 
-distclean::
+distclean:
 	$(MAKE) clean
 
-man::
+man:
 	-@if test ! -d $(POSTMANDIR) ; then mkdir $(POSTMANDIR) ; fi
 	gunzip -c man.tar.gz | (cd $(POSTMANDIR) ; $(TAR) xf - )
 

doc/src/Makefile

@@ -23,19 +23,19 @@ TARGETS= $(SRC:%=%.tar.gz)
 .PRECIOUS:
 .PHONY: install all sources clean distclean
 
-install::
+install:
 	$(MAKE) all
 	(mv -f *.gz ..)
 
-clean::
+clean:
 	$(MAKE) -C sgml clean
 
-distclean::
+distclean:
 	$(MAKE) -C sgml distclean
 
-all:: $(TARGETS)
+all: $(TARGETS)
 
-sources::
+sources:
 	$(MAKE) sources.tar.gz
 
 sources.tar:

doc/src/sgml/Makefile

@@ -8,7 +8,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/doc/src/sgml/Makefile,v 1.15 2000/06/18 21:24:51 petere Exp $
+#    $Header: /cvsroot/pgsql/doc/src/sgml/Makefile,v 1.16 2000/07/16 14:50:38 petere Exp $
 #
 #----------------------------------------------------------------------------
 
@@ -121,9 +121,9 @@ SQLTARGETS= $(XSQLTARGETS:-ref.l=.l)
 .PRECIOUS: postgres.tex postgres.dvi
 .PHONY: install all clean distclean
 
-install::
+install:
 
-all::
+all:
 
 man:
 	$(MAKE) man1 manl
@@ -143,10 +143,10 @@ manl: $(SQLTARGETS) manpage.refs
 	if [ ! -d manl ]; then mkdir manl; fi
 	cp *.l manl/
 
-clean::
+clean:
 	(rm -rf HTML.manifest *.html *.htm *.1 *.l man1 manl manpage*)
 
-distclean::
+distclean:
 	$(MAKE) clean
 
 #

src/Makefile.global.in

@@ -7,7 +7,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.86 2000/07/09 13:13:59 petere Exp $
+#    $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.87 2000/07/16 14:50:41 petere Exp $
 #
 # NOTES
 #    Essentially all Postgres make files include this file and use the
@@ -283,3 +283,71 @@ STRDUP = @STRDUP@
 
 .PHONY: all install installdirs uninstall dep depend clean distclean maintainer-clean
 .SILENT: installdirs
+
+# make `all' the default target
+all:
+
+$(top_builddir)/src/Makefile.global: $(top_srcdir)/src/Makefile.global.in $(top_builddir)/config.status
+	cd $(top_builddir) && CONFIG_FILES=src/Makefile.global CONFIG_HEADERS= ./config.status
+
+$(top_builddir)/config.status: $(top_srcdir)/configure
+	cd $(top_builddir) && ./config.status --recheck
+
+
+
+
+COMPILE.c = $(CC) -c $(CPPFLAGS) $(CFLAGS)
+
+# Automatic dependency generation
+# -------------------------------
+# When we configure with --enable-depend then we override the default
+# compilation rule with the magic below. While or after creating the
+# actual output file we also create a dependency list for the .c file.
+# Next time we invoke make we will have top-notch information about
+# whether this file needs to be updated. The dependency files are kept
+# in the .deps subdirectory of each directory.
+#
+# The sed command is necessary to post-process the dependency file:
+# Each dependency file becomes a target of its own, without
+# dependencies or commands. This is because if you happen to remove a
+# file that is a dependency (say, you rename a header file) the
+# dependency would point to a non-existing file and make would fail.
+# But if the file is listed as a target of its own, without
+# prerequisites and commands, and doesn't exist then make will
+# consider it updated. (That in turn also has the nice side effect
+# that make will update all files that depended on the now removed
+# file.)
+
+autodepend = @autodepend@
+
+ifdef autodepend
+
+DEPDIR = .deps
+df = $(DEPDIR)/$(*F)
+
+ifeq ($(GCC), yes)
+
+# GCC allows us to create object and dependency file in one invocation.
+%.o : %.c
+	$(COMPILE.c) -MMD $< -o $@
+	@if test ! -d $(DEPDIR); then mkdir $(DEPDIR); fi; \
+	 cp $*.d $(df).P; \
+	 sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
+	     -e '/^$$/ d' -e 's/$$/ :/' < $*.d >> $(df).P; \
+	 rm -f $*.d
+
+endif # GCC
+
+# Include all the dependency files generated for the current
+# directory. List /dev/null as dummy because if the wildcard expands
+# to nothing then make would complain.
+-include $(wildcard $(DEPDIR)/*.P) /dev/null
+
+# hook for clean-up
+clean: clean-deps
+
+.PHONY: clean-deps
+clean-deps:
+	@rm -rf $(DEPDIR)
+
+endif # autodepend

src/backend/Makefile

@@ -4,7 +4,7 @@
 #
 # Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/backend/Makefile,v 1.61 2000/07/14 15:30:56 thomas Exp $
+# $Header: /cvsroot/pgsql/src/backend/Makefile,v 1.62 2000/07/16 14:50:44 petere Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -188,6 +188,3 @@ quick: $(OBJS)
 
 depend dep: $(top_srcdir)/src/include/parser/parse.h $(top_builddir)/src/include/utils/fmgroids.h
 	for i in $(DIRS); do $(MAKE) -C $$i $@; done
-
-.DEFAULT:
-	for i in $(DIRS); do $(MAKE) -C $$i $@; done