Make unknown-option-warning code more portable. echo -n is not portable,

and neither is "|" or "\|" in basic regular expressions.

config/general.m4

-# $PostgreSQL: pgsql/config/general.m4,v 1.5 2006/08/11 18:51:50 alvherre Exp $
+# $PostgreSQL: pgsql/config/general.m4,v 1.6 2006/10/13 20:23:07 petere Exp $
 
 # This file defines new macros to process configure command line
 # arguments, to replace the brain-dead AC_ARG_WITH and AC_ARG_ENABLE.
@@ -75,18 +75,18 @@ AC_ARG_WITH([$2], [$3], [
 # PGAC_CHECK_ARGS()
 # -----------------
 # Checks if the user passed any --with/without/enable/disable arguments that
-# we don't recognise. Just prints out a warning message, so this should be
+# we don't recognize. Just prints out a warning message, so this should be
 # called near the end, so the user will see it.
 
 AC_DEFUN([PGAC_CHECK_ARGS],
 [
-  for var in `set |sed -ne '/^\(with_\|enable\_\)/ s/=.*//p'` ; do
-     case $var in
+  for pgac_var in `set | sed 's/=.*//' | $EGREP 'with_|enable_'`; do
+    case $pgac_var in
       m4_undivert([PGAC_ARGS])
       with_gnu_ld) ;;
     *)
-       echo -n "*** Option ignored: "
-       echo $var | sed -e 's/\([^=]*\)/--\1/;s/_/-/g'
+      pgac_txt=`echo $pgac_var | tr '_' '-'`
+      AC_MSG_WARN([option ignored: --$pgac_txt])
       ;;
     esac
   done

configure

@@ -22980,8 +22980,8 @@ fi
 #
 
 
-  for var in `set |sed -ne '/^\(with_\|enable\_\)/ s/=.*//p'` ; do
-     case $var in
+  for pgac_var in `set | sed 's/=.*//' | $EGREP 'with_|enable_'`; do
+    case $pgac_var in
       with_template) ;;
 with_docdir) ;;
 with_includes) ;;
@@ -23016,8 +23016,9 @@ with_zlib) ;;
 
       with_gnu_ld) ;;
     *)
-       echo -n "*** Option ignored: "
-       echo $var | sed -e 's/\(^=*\)/--\1/;s/_/-/g'
+      pgac_txt=`echo $pgac_var | tr '_' '-'`
+      { echo "$as_me:$LINENO: WARNING: option ignored: --$pgac_txt" >&5
+echo "$as_me: WARNING: option ignored: --$pgac_txt" >&2;}
       ;;
     esac
   done