Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/m4.m4 |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1-src/m4/m4.m4 (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/m4.m4 (revision 0) |
@@ -0,0 +1,27 @@ |
+# Copyright 2000 Free Software Foundation, Inc. |
+# |
+# This program is free software: you can redistribute it and/or modify |
+# it under the terms of the GNU General Public License as published by |
+# the Free Software Foundation, either version 3 of the License, or |
+# (at your option) any later version. |
+# |
+# This program is distributed in the hope that it will be useful, |
+# but WITHOUT ANY WARRANTY; without even the implied warranty of |
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
+# GNU General Public License for more details. |
+# |
+# You should have received a copy of the GNU General Public License |
+# along with this program. If not, see <http://www.gnu.org/licenses/>. |
+ |
+# BISON_PROG_GNU_M4 |
+# ----------------- |
+# Check for GNU m4, at least 1.3 (supports frozen files). |
+AC_DEFUN([BISON_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])]) |