/usr/share/aclocal/ax_c_arithmetic_rshift.m4 is in autoconf-archive 20140228-1.1.
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 36 | # ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_c_arithmetic_rshift.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_C_ARITHMETIC_RSHIFT
#
# DESCRIPTION
#
# Checks if the right shift operation is arithmetic.
#
# This macro uses compile-time detection and so is cross-compile ready.
#
# LICENSE
#
# Copyright (c) 2008 YAMAMOTO Kengo <yamaken@bp.iij4u.or.jp>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 8
AC_DEFUN([AX_C_ARITHMETIC_RSHIFT], [
AC_CACHE_CHECK([whether right shift operation is arithmetic],
[ax_cv_c_arithmetic_rshift],
[AC_COMPILE_IFELSE([[int dummy[((-1 >> 1) < 0) ? 1 : -1];]],
[ax_cv_c_arithmetic_rshift=yes],
[ax_cv_c_arithmetic_rshift=no])])
if test "x$ax_cv_c_arithmetic_rshift" = xyes; then
AC_DEFINE([HAVE_ARITHMETIC_RSHIFT], [1],
[Define to 1 if the right shift operation is arithmetic.])
fi
])
|