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1 #serial 4
2
3 dnl From Paul Eggert.
4
5 AC_DEFUN([AC_C_BACKSLASH_A],
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 ])
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