| | 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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