| | 1 | # Copyright 2000 Free Software Foundation, Inc. |
| | 2 | # |
| | 3 | # This program is free software: you can redistribute it and/or modify |
| | 4 | # it under the terms of the GNU General Public License as published by |
| | 5 | # the Free Software Foundation, either version 3 of the License, or |
| | 6 | # (at your option) any later version. |
| | 7 | # |
| | 8 | # This program is distributed in the hope that it will be useful, |
| | 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 11 | # GNU General Public License for more details. |
| | 12 | # |
| | 13 | # You should have received a copy of the GNU General Public License |
| | 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| | 15 | |
| | 16 | # BISON_PROG_GNU_M4 |
| | 17 | # ----------------- |
| | 18 | # Check for GNU m4, at least 1.3 (supports frozen files). |
| | 19 | AC_DEFUN([BISON_PROG_GNU_M4], |
| | 20 | [AC_PATH_PROGS(M4, gm4 gnum4 m4, m4) |
| | 21 | AC_CACHE_CHECK(whether m4 supports frozen files, ac_cv_prog_gnu_m4, |
| | 22 | [ac_cv_prog_gnu_m4=no |
| | 23 | if test x"$M4" != x; then |
| | 24 | case `$M4 --help < /dev/null 2>&1` in |
| | 25 | *reload-state*) ac_cv_prog_gnu_m4=yes ;; |
| | 26 | esac |
| | 27 | fi])]) |
projects / bison.git / blame_incremental