Add non-XS extensions to known_extensions.

Previously "known_extensions" was misnamed, as it only contained known XS
extensions. grep.cpan.me suggests that there are only 10 mentions of it
outside the core, and none of them rely on this existing behaviour.

Update the descriptions of extensions, known_extensions and nonxs_ext in
Porting/Glossary.

These changes need replicating into configure.com.

1 files changed, 10 insertions, 9 deletions

diff --git a/Configure b/Configure
index dbccc28226..e4e7d81b1c 100755
--- a/Configure
+++ b/Configure
@@ -22353,10 +22353,10 @@ esac
 : Check extensions
 echo " "
 echo "Looking for extensions..." >&4
-: If we are using the old config.sh, known_extensions may contain
-: old or inaccurate or duplicate values.
-known_extensions=''
+: If we are using the old config.sh, nonxs_extensions and xs_extensions may
+: contain old or inaccurate or duplicate values.
 nonxs_extensions=''
+xs_extensions=''
 : We do not use find because it might not be available.
 : We do not just use MANIFEST because the user may have dropped
 : some additional extensions into the source tree and expect them
@@ -22372,7 +22372,7 @@ find_extensions='
 	    DynaLoader|dynaload) ;;
 	    *)
 	    this_ext=`echo $xxx | $sed -e s/-/\\\//g`;
-	    echo " $known_extensions $nonxs_extensions" > $$.tmp;
+	    echo " $xs_extensions $nonxs_extensions" > $$.tmp;
 	    if $contains " $this_ext " $$.tmp; then
 		echo >&4;
 		echo "Duplicate directories detected for extension $xxx" >&4;
@@ -22393,9 +22393,9 @@ find_extensions='
 	    fi;
 	    $ls -1 $xxx > $$.tmp;
 	    if   $contains "\.xs$" $$.tmp > /dev/null 2>&1; then
-		known_extensions="$known_extensions $this_ext";
+		xs_extensions="$xs_extensions $this_ext";
 	    elif $contains "\.c$"  $$.tmp > /dev/null 2>&1; then
-		known_extensions="$known_extensions $this_ext";
+		xs_extensions="$xs_extensions $this_ext";
 	    elif $test -d $xxx; then
 		nonxs_extensions="$nonxs_extensions $this_ext";
 	    fi;
@@ -22416,17 +22416,18 @@ cd "$rsrc/ext"
 set X
 shift
 eval $find_extensions
-set X $known_extensions
+set X $xs_extensions
 shift
-known_extensions=`echo "$*" | tr ' ' $trnl | $sort | tr $trnl ' '`
+xs_extensions=`echo "$*" | tr ' ' $trnl | $sort | tr $trnl ' '`
 set X $nonxs_extensions
 shift
 nonxs_extensions=`echo "$*" | tr ' ' $trnl | $sort | tr $trnl ' '`
 cd "$tdir"
+known_extensions=`echo $nonxs_extensions $xs_extensions  | tr ' ' $trnl | $sort | tr $trnl ' '`
 
 : Now see which are supported on this system.
 avail_ext=''
-for xxx in $known_extensions ; do
+for xxx in $xs_extensions ; do
 	case "$xxx" in
 	DB_File|db_file)
 		case "$i_db" in