-# serial 1 -*- Autoconf -*-
-
-# BISON_AC_PROG_GNU_M4
-# --------------------
-# Check for GNU m4, at least 1.3 (supports frozen files).
-AC_DEFUN([BISON_AC_PROG_GNU_M4],
-[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4)
-AC_CACHE_CHECK([whether m4 supports frozen files],
- [ac_cv_prog_gnu_m4],
-[ac_cv_prog_gnu_m4=no
-if test x"$M4" != x; then
- case `$M4 --help < /dev/null 2>&1` in
- *reload-state*) ac_cv_prog_gnu_m4=yes ;;
- esac
-fi])
-])# BISON_AC_PROG_GNU_M4