Big warnings cleanup for Solaris/GCC. Down to about 40 now, but

we'll get there one day.

Use `cat' to create aclocal.m4, not `aclocal'. Some people don't
have automake installed.

Only run the autoconf rule in the top-level GNUmakefile if the
invoker specified `make configure', don't run it automatically
because of CVS timestamp skew.

GNUmakefile.in

@@ -1,7 +1,7 @@
 #
 # PostgreSQL top level makefile
 #
-# $Header: /cvsroot/pgsql/GNUmakefile.in,v 1.4 2000/06/11 18:43:52 tgl Exp $
+# $Header: /cvsroot/pgsql/GNUmakefile.in,v 1.5 2000/06/14 18:17:24 petere Exp $
 #
 
 srcdir = @srcdir@
@@ -30,26 +30,27 @@ distclean:
 .PHONY: all install clean distclean
 
 
-AUTOCONF = @AUTOCONF@
-ACLOCAL = @ACLOCAL@
-
 GNUmakefile: GNUmakefile.in $(top_builddir)/config.status
 	CONFIG_FILES=$@ CONFIG_HEADERS= ./config.status
 
-# This rule does not work --- what if config.status doesn't exist?
+$(top_builddir)/config.status: $(top_srcdir)/configure
+	cd $(top_builddir) && ./config.status --recheck
+
 
-# $(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
+# unnecessary reruns of these rules.
 
-# These dependencies are evil and dangerous, because they can cause make
-# to re-run autoconf and then re-run configure due to configure not
-# having a newer timestamp than configure.in after a CVS pull.  Same
-# problem for aclocal timestamp skew.  This solution is considerably
-# worse than the problem it was intended to solve.
-# Do not put it back or I will take it right out again --- tgl
+AUTOCONF = autoconf
 
-# $(top_srcdir)/configure: $(top_srcdir)/configure.in $(top_srcdir)/aclocal.m4
-# 	cd $(top_srcdir) && $(AUTOCONF)
+# Only use this rule if you actually said `make configure'.
+ifeq ($(MAKECMDGOALS),configure)
+$(top_srcdir)/configure: $(top_srcdir)/configure.in $(top_srcdir)/aclocal.m4
+	cd $(top_srcdir) && $(AUTOCONF)
+endif
 
-# $(top_srcdir)/aclocal.m4: $(wildcard $(top_srcdir)/config/*.m4)
-# 	cd $(top_srcdir) && $(ACLOCAL) -I config
+# This one we can leave unprotected because by default nothing depends
+# on aclocal.m4. This rule is only invoked if you say `make
+# aclocal.m4' or `make configure'.
+$(top_srcdir)/aclocal.m4: $(wildcard $(top_srcdir)/config/*.m4)
+	cat $^ > $@