2 dnl Copyright (C) 2010-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_TCGETSID],
9 AC_REQUIRE([gl_TERMIOS_H_DEFAULTS])
11 dnl Persuade glibc <termios.h> to declare tcgetsid().
12 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
14 AC_CHECK_DECLS([tcgetsid], , , [[#include <termios.h>]])
15 if test $ac_cv_have_decl_tcgetsid = no; then
19 dnl We can't use AC_CHECK_FUNC here, because tcgetsid() is defined as a
20 dnl static inline function when compiling for Android 4.4 or older.
21 AC_CACHE_CHECK([for tcgetsid], [gl_cv_func_tcgetsid],
24 [[#include <termios.h>]],
25 [[return tcgetsid(0);]])
27 [gl_cv_func_tcgetsid=yes],
28 [gl_cv_func_tcgetsid=no])
30 if test $gl_cv_func_tcgetsid = yes; then
37 # Prerequisites of lib/tcgetsid.c.
38 AC_DEFUN([gl_PREREQ_TCGETSID], [