check syntax used to enable bison push/pull parser * acinclude.m4 (OCTAVE_PROG_BISON): Check for syntax used to enable push/pull parser. * common.mk (BISON_PUSH_PULL_DECL_STYLE): New variable. * libinterp/Makefile.am (BUILT_DISTFILES): Include oct-parse.yy in the list. (EXTRA_DIST): Include oct-pase.in.yy in the list. (ULT_DIST_SRC): New variable. (SRC_DEF_FILES, TST_FILES_SRC): Use $(ULT_DIST_SRC) instead of $(DIST_SRC). * find-defun-files.sh: Transform .in.yy instead of .yy. * libinterp/parse-tree/module.mk (parse-tree/oct-parse.yy): New target and rule to substitute push-pull decl. * oct-parse.in.yy: Rename from oct-parse.yy Substitute %PUSH_PULL_DECL%.

--- a/libinterp/find-defun-files.sh
+++ b/libinterp/find-defun-files.sh
@@ -21,6 +21,6 @@
     file="$srcdir/$arg"
   fi
   if [ "`$EGREP -l "$DEFUN_PATTERN" $file`" ]; then
-    echo "$file" | $SED "s,\\$srcdir/,," | $SED 's/\.cc$/.df/; s/\.ll$/.df/; s/\.yy$/.df/';
+    echo "$file" | $SED "s,\\$srcdir/,," | $SED 's/\.cc$/.df/; s/\.ll$/.df/; s/\.in.yy$/.df/';
   fi
 done