m4/c-bs-a.m4

   1 # c-bs-a.m4 serial 4 (fileutils-4.1.3)
   2 dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8
   9 dnl From Paul Eggert.
  10
  11 AC_DEFUN([AC_C_BACKSLASH_A],
  12 [
  13   AC_CACHE_CHECK([whether backslash-a works in strings], ac_cv_c_backslash_a,
  14    [AC_TRY_COMPILE([],
  15      [
  16 #if '\a' == 'a'
  17       syntax error;
  18 #endif
  19       char buf['\a' == 'a' ? -1 : 1];
  20       buf[0] = '\a';
  21       return buf[0] != "\a"[0];
  22      ],
  23      ac_cv_c_backslash_a=yes,
  24      ac_cv_c_backslash_a=no)])
  25   if test $ac_cv_c_backslash_a = yes; then
  26     AC_DEFINE(HAVE_C_BACKSLASH_A, 1,
  27       [Define if backslash-a works in C strings.])
  28   fi
  29 ])