/usr/arm-linux-gnueabihf/include/bits/select2.h is in libc6-dev-armhf-cross 2.24-10cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | /* Checking macros for select functions.
Copyright (C) 2011-2016 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_SELECT_H
# error "Never include <bits/select2.h> directly; use <sys/select.h> instead."
#endif
/* Helper functions to issue warnings and errors when needed. */
extern long int __fdelt_chk (long int __d);
extern long int __fdelt_warn (long int __d)
__warnattr ("bit outside of fd_set selected");
#undef __FD_ELT
#define __FD_ELT(d) \
__extension__ \
({ long int __d = (d); \
(__builtin_constant_p (__d) \
? (0 <= __d && __d < __FD_SETSIZE \
? (__d / __NFDBITS) \
: __fdelt_warn (__d)) \
: __fdelt_chk (__d)); })
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