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#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
])
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