[bison.git] / m4 / c-bs-a.m4

#serial 4

dnl From Paul Eggert.

AC_DEFUN([AC_C_BACKSLASH_A],
[
  AC_CACHE_CHECK([whether backslash-a works in strings], ac_cv_c_backslash_a,
   [AC_TRY_COMPILE([],
     [
#if '\a' == 'a'
      syntax error;
#endif
      char buf['\a' == 'a' ? -1 : 1];
      buf[0] = '\a';
      return buf[0] != "\a"[0];
     ],
     ac_cv_c_backslash_a=yes,
     ac_cv_c_backslash_a=no)])
  if test $ac_cv_c_backslash_a = yes; then
    AC_DEFINE(HAVE_C_BACKSLASH_A, 1,
      [Define if backslash-a works in C strings.])
  fi
])
Commit	Line	Data
4a0d8936	1	#serial 4
ff4a34be AD	2
	3	dnl From Paul Eggert.
	4
4a0d8936	5	AC_DEFUN([AC_C_BACKSLASH_A],
ff4a34be AD	6	[
	7	AC_CACHE_CHECK([whether backslash-a works in strings], ac_cv_c_backslash_a,
	8	[AC_TRY_COMPILE([],
	9	[
	10	#if '\a' == 'a'
	11	syntax error;
	12	#endif
	13	char buf['\a' == 'a' ? -1 : 1];
	14	buf[0] = '\a';
	15	return buf[0] != "\a"[0];
	16	],
	17	ac_cv_c_backslash_a=yes,
	18	ac_cv_c_backslash_a=no)])
	19	if test $ac_cv_c_backslash_a = yes; then
	20	AC_DEFINE(HAVE_C_BACKSLASH_A, 1,
	21	[Define if backslash-a works in C strings.])
	22	fi
	23	])