Only look for bison as YACC; other yaccs need to be selected explicitly.

When no suitable YACC is configured, supply useful informational messages
to users.  (Same way flex has been handled for a while.)

Author: petere

config/missing

@@ -5,27 +5,27 @@
 # behavior when certain utility programs are missing.
 
 case $1 in
-    flex)
-        # `missing flex <input> <output>'
+    flex|bison)
+        # `missing flex|bison <input> <output>'
         input=$2
         output=$3
         if test -f "$output"; then
             echo "\
 ***
-WARNING: \`flex' is missing on your system. You should only need it
+WARNING: \`$1' is missing on your system. You should only need it
 if you changed the file \`$input'; these changes will not take effect.
-You can get flex from a GNU mirror site.
+You can get $1 from a GNU mirror site.
 ***"
             echo "touch $output"
             touch "$output"
             exit 0
         else # ! test -f $output
             echo "\
 ***
-ERROR: \`flex' is missing on your system. It is needed to create the
-file \`$output'. You can either get flex from a GNU mirror site
+ERROR: \`$1' is missing on your system. It is needed to create the
+file \`$output'. You can either get $1 from a GNU mirror site
 or download an official distribution of PostgreSQL, which contains
-pre-packaged flex output.
+pre-packaged $1 output.
 ***"
             exit 1
         fi

config/programs.m4

@@ -1,4 +1,4 @@
-# $Header: /cvsroot/pgsql/config/programs.m4,v 1.3 2001/02/06 19:20:16 petere Exp $
+# $Header: /cvsroot/pgsql/config/programs.m4,v 1.4 2001/02/10 22:31:42 petere Exp $
 
 
 # PGAC_PATH_FLEX
@@ -46,19 +46,16 @@ fi
 if test x"$pgac_cv_path_flex" = x"no"; then
   if test -n "$pgac_broken_flex"; then
     AC_MSG_WARN([
-***
-The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
-should get version 2.5.4 or later.
-###])
+*** The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
+*** should get version 2.5.4 or later.])
   fi
 
   AC_MSG_WARN([
-***
-Without Flex you won't be able to build PostgreSQL from scratch, or change
-any of the scanner definition files. You can obtain Flex from a GNU mirror
-site. (If you are using the official distribution of PostgreSQL then you
-do not need to worry about this because the lexer files are pre-generated.)
-***])
+*** Without Flex you will not be able to build PostgreSQL from CVS or
+*** change any of the scanner definition files.  You can obtain Flex from
+*** a GNU mirror site.  (If you are using the official distribution of
+*** PostgreSQL then you do not need to worry about this because the Flex
+*** output is pre-generated.)])
 fi
 
 if test x"$pgac_cv_path_flex" = x"no"; then