maint: Redirect developers to active branch

_This_ branch does not contain actively-developed code.  More likely,
you want to check out branch-1.4 (latest stable), branch-1.6 (some
speedups over 1.4, but not yet released), or branch-2.0 (many more
experimental changes, and even further from release).

* README: Document the status of this git repository.

1 files changed, 0 insertions, 77 deletions

diff --git a/build-aux/m4/gmp.m4 b/build-aux/m4/gmp.m4
deleted file mode 100644
index 0e60bdcc..00000000
--- a/build-aux/m4/gmp.m4
+++ /dev/null
@@ -1,77 +0,0 @@
-## -*- Autoconf -*-
-## Copyright (C) 2000-2001, 2003, 2006-2008, 2010, 2013-2014, 2017 Free
-## Software Foundation, Inc.
-##
-## This file is part of GNU M4.
-##
-## GNU M4 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.
-##
-## GNU M4 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/>.
-
-# serial 10
-
-m4_define([_M4_LIB_GMP],
-[AC_ARG_WITH([gmp],
-  [AS_HELP_STRING([--without-gmp],
-    [don't use GNU multiple precision arithmetic library])],
-[use_gmp=$withval], [use_gmp=yes])
-
-case $use_gmp:$LIBADD_GMP:$ac_cv_header_gmp_h in
-  no:*)
-    M4_cv_using_lib_gmp=no
-    ;;
-  *::yes)
-    AC_MSG_WARN([gmp library not found or does not appear to work
-                 but `gmp.h' is present])
-    M4_cv_using_lib_gmp=no
-    ;;
-  *:-lgmp:no)
-    AC_MSG_WARN([gmp works but `gmp.h' is missing])
-    M4_cv_using_lib_gmp=no
-    ;;
-  yes:*:yes)
-    M4_cv_using_lib_gmp=yes
-    ;;
-  *)
-    M4_cv_using_lib_gmp=no
-    AC_MSG_WARN([could not detect gmp library])
-    ;;
-esac
-])# _M4_LIB_GMP
-
-
-AC_DEFUN([M4_LIB_GMP],
-[AC_PREREQ([2.56])dnl We use the new compiler based header checking in 2.56
-AC_CHECK_HEADERS([gmp.h], [], [], [AC_INCLUDES_DEFAULT])
-m4_pattern_allow([^M4_gmp_save_LIBS$])
-# Some versions of gmp provide mpq_init as a macro, so we need to
-# include the header file, otherwise the detection will fail.
-M4_gmp_save_LIBS="$LIBS"
-LIBS="$LIBS -lgmp"
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_GMP_H
-#  include <gmp.h>
-#endif]],
-  [[mpq_t n; mpq_init (n);]])],
-  [LIBADD_GMP=-lgmp])
-LIBS=$M4_gmp_save_LIBS
-AC_SUBST([LIBADD_GMP])
-
-_M4_LIB_GMP
-
-# Don't try to link in libgmp if we are not using it after the last call
-if test "$M4_cv_using_lib_gmp" = yes; then
-  AC_DEFINE([USE_GMP], [1],
-    [Define to 1 if using the GNU multiple precision library.])
-fi
-
-AC_SUBST([USE_GMP], [$M4_cv_using_lib_gmp])
-])# M4_LIB_GMP