m4/ax_prog_bison_version.m4

@@ -48,7 +48,7 @@ AC_DEFUN([AX_PROG_BISON_VERSION],[         changequote(<<,>>)         bison_version=`$YACC --version 2>&1 \           | $GREP bison \-          | $SED -rn -e 's/bison .* ([0-9]+([.][0-9])+)+/\1/p'`+          | $SED -e 's/^[^0-9]*//' -e 's/[^0-9]*$//'`         changequote([,])         AC_MSG_RESULT($bison_version)