Make the default pg_hba.conf include an entry for ::1 only if configure

set HAVE_IPV6.  Per recent discussions.

configure

@@ -11193,6 +11193,7 @@ fi
 
 
 
+HAVE_IPV6=no
 echo "$as_me:$LINENO: checking for struct sockaddr_in6" >&5
 echo $ECHO_N "checking for struct sockaddr_in6... $ECHO_C" >&6
 if test "${ac_cv_type_struct_sockaddr_in6+set}" = set; then
@@ -11314,11 +11315,13 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_IPV6 1
 _ACEOF
 
+							  HAVE_IPV6=yes
 fi
 
 fi
 
 
+
 echo "$as_me:$LINENO: checking for PS_STRINGS" >&5
 echo $ECHO_N "checking for PS_STRINGS... $ECHO_C" >&6
 if test "${pgac_cv_var_PS_STRINGS+set}" = set; then
@@ -18286,6 +18289,7 @@ s,@python_configdir@,$python_configdir,;t t
 s,@python_includespec@,$python_includespec,;t t
 s,@python_libspec@,$python_libspec,;t t
 s,@LIBOBJS@,$LIBOBJS,;t t
+s,@HAVE_IPV6@,$HAVE_IPV6,;t t
 s,@THREAD_CFLAGS@,$THREAD_CFLAGS,;t t
 s,@THREAD_LIBS@,$THREAD_LIBS,;t t
 s,@HAVE_POSIX_SIGNALS@,$HAVE_POSIX_SIGNALS,;t t

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $Header: /cvsroot/pgsql/configure.in,v 1.283 2003/09/01 23:01:49 petere Exp $
+dnl $Header: /cvsroot/pgsql/configure.in,v 1.284 2003/09/07 03:36:02 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -832,12 +832,15 @@ AC_CHECK_FUNCS([cbrt dlopen fcvt fdatasync getpeereid memmove poll pstat setproc
 
 AC_CHECK_DECLS(fdatasync, [], [], [#include <unistd.h>])
 
+HAVE_IPV6=no
 AC_CHECK_TYPE([struct sockaddr_in6],
               [AC_CHECK_FUNC(inet_ntop,
-                             [AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if you have support for IPv6.])])],
+                             [AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if you have support for IPv6.])
+							  HAVE_IPV6=yes])],
               [],
 [$ac_includes_default
 #include <netinet/in.h>])
+AC_SUBST(HAVE_IPV6)
 
 AC_CACHE_CHECK([for PS_STRINGS], [pgac_cv_var_PS_STRINGS],
 [AC_TRY_LINK(

src/Makefile.global.in

 # -*-makefile-*-
-# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.167 2003/09/01 23:01:49 petere Exp $
+# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.168 2003/09/07 03:36:02 tgl Exp $
 
 #------------------------------------------------------------------------------
 # All PostgreSQL makefiles include this file and use the variables it sets,
@@ -263,6 +263,9 @@ host_tuple = @host@
 host_os = @host_os@
 host_cpu = @host_cpu@
 
+# Make HAVE_IPV6 available for initdb script creation
+HAVE_IPV6= @HAVE_IPV6@
+
 # The HP-UX port makefile, for one, needs access to this symbol
 HAVE_POSIX_SIGNALS= @HAVE_POSIX_SIGNALS@
 

src/backend/libpq/pg_hba.conf.sample

@@ -51,7 +51,7 @@
 # TYPE  DATABASE    USER        IP-ADDRESS        IP-MASK           METHOD
 
 local   all         all                                             trust
+# IPv4-style local connections:
 host    all         all         127.0.0.1         255.255.255.255   trust
-
-# uncomment this to support IPv6 loopback connections
-# host  all         all         ::1               ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff        trust
+# IPv6-style local connections:
+host    all         all         ::1               ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff        trust

src/bin/initdb/Makefile

@@ -5,7 +5,7 @@
 # Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/bin/initdb/Makefile,v 1.28 2002/09/03 21:45:43 petere Exp $
+# $Header: /cvsroot/pgsql/src/bin/initdb/Makefile,v 1.29 2003/09/07 03:36:03 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -18,6 +18,7 @@ all: initdb
 initdb: initdb.sh $(top_builddir)/src/Makefile.global
 	sed -e 's/@VERSION@/$(VERSION)/g' \
 	    -e 's,@SHELL@,$(SHELL),g' \
+	    -e 's,@HAVE_IPV6@,$(HAVE_IPV6),g' \
 	    -e 's,@bindir@,$(bindir),g' \
 	    -e 's,@datadir@,$(datadir),g' \
 	  $< >$@

src/bin/initdb/initdb.sh

@@ -27,7 +27,7 @@
 # Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.200 2003/08/26 15:38:25 tgl Exp $
+# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.201 2003/09/07 03:36:03 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -76,6 +76,7 @@ CMDNAME=`basename $0`
 
 # Placed here during build
 VERSION='@VERSION@'
+HAVE_IPV6='@HAVE_IPV6@'
 bindir='@bindir@'
 # Note that "datadir" is not the directory we're initializing, it's
 # merely how Autoconf names PREFIX/share.
@@ -584,8 +585,6 @@ echo "$nconns"
 
 $ECHO_N "creating configuration files... "$ECHO_C
 
-cp "$PG_HBA_SAMPLE" "$PGDATA"/pg_hba.conf              || exit_nicely
-cp "$PG_IDENT_SAMPLE" "$PGDATA"/pg_ident.conf          || exit_nicely
 sed -e "s/^#shared_buffers = 1000/shared_buffers = $nbuffers/" \
     -e "s/^#max_connections = 100/max_connections = $nconns/" \
     -e "s/^#lc_messages = 'C'/lc_messages = '`pg_getlocale MESSAGES`'/" \
@@ -593,6 +592,14 @@ sed -e "s/^#shared_buffers = 1000/shared_buffers = $nbuffers/" \
     -e "s/^#lc_numeric = 'C'/lc_numeric = '`pg_getlocale NUMERIC`'/" \
     -e "s/^#lc_time = 'C'/lc_time = '`pg_getlocale TIME`'/" \
     "$POSTGRESQL_CONF_SAMPLE"  > "$PGDATA"/postgresql.conf || exit_nicely
+if [ "x$HAVE_IPV6" = xyes ]
+then
+    cp "$PG_HBA_SAMPLE" "$PGDATA"/pg_hba.conf          || exit_nicely
+else
+    sed -e "/ ::1 / s/^host/#host/" \
+        "$PG_HBA_SAMPLE" > "$PGDATA"/pg_hba.conf       || exit_nicely
+fi
+cp "$PG_IDENT_SAMPLE" "$PGDATA"/pg_ident.conf          || exit_nicely
 
 chmod 0600 "$PGDATA"/pg_hba.conf "$PGDATA"/pg_ident.conf \
 	"$PGDATA"/postgresql.conf