build: Recover and update *.m4.

* m4/lib-ld.m4, m4/lib-link.m4, m4/lib-prefix.m4: Copied
from gnulib.
* m4/po.m4, m4/nls.m4, m4/progtest.m4: Likewise.
* m4/gettext.m4, m4/iconv.m4: Update from gnulib.
* m4/host-cpu-c-abi.m4: New from gnulib.

--

Fixes-commit: 980e4410bb0a372a7bcce5f454915e6565a56b96
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/m4/nls.m4 b/m4/nls.m4
new file mode 100644
index 0000000..f4f6b80
--- /dev/null
+++ b/m4/nls.m4
@@ -0,0 +1,32 @@
+# nls.m4 serial 6 (gettext-0.20.2)
+dnl Copyright (C) 1995-2003, 2005-2006, 2008-2014, 2016, 2019-2021 Free
+dnl Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Lesser General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Lesser General Public License, and the rest of the GNU
+dnl gettext package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
+dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
+
+AC_PREREQ([2.50])
+
+AC_DEFUN([AM_NLS],
+[
+  AC_MSG_CHECKING([whether NLS is requested])
+  dnl Default is enabled NLS
+  AC_ARG_ENABLE([nls],
+    [  --disable-nls           do not use Native Language Support],
+    USE_NLS=$enableval, USE_NLS=yes)
+  AC_MSG_RESULT([$USE_NLS])
+  AC_SUBST([USE_NLS])
+])