login: Move libutil into libc

The symbols forkpty, login, login_tty, logout, logwtmp, openpty
were moved using scripts/move-symbol-to-libc.py.

This is a single commit because most of the symbols are tied together
via forkpty, for example.

Several changes to use hidden prototypes are needed.  This commit
also updates pseudoterminal terminology on modified lines.

For 390 (31-bit), this commit follows the existing style for the
compat symbol version creation.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/login/libutil-compat.c b/login/libutil-compat.c
new file mode 100644
index 0000000000..249512a22e
--- /dev/null
+++ b/login/libutil-compat.c
@@ -0,0 +1,33 @@
+/* Placeholder compatibility symbols for libutil.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <shlib-compat.h>
+#include <sys/cdefs.h>
+
+/* This file is used to keep specific symbol versions occupied, so
+   that ld does not generate weak symbol version definitions.  */
+
+void
+attribute_compat_text_section
+__attribute_used__
+__libutil_version_placeholder_1 (void)
+{
+}
+
+compat_symbol (libutil, __libutil_version_placeholder_1,
+               __libutil_version_placeholder, GLIBC_2_0);