+2016-08-17 Paul Eggert <eggert@cs.ucla.edu>
+
+ stdbool: don't require _Bool for C++
+ Problem reported by David Seifert in:
+ http://lists.gnu.org/archive/html/bug-gnulib/2016-06/msg00005.html
+ * NEWS, doc/posix-headers/stdbool.texi (stdbool.h): Document this.
+ * m4/stdbool.m4 (AC_CHECK_HEADER_STDBOOL): Make the check
+ more-forgiving for C++, in that it requires only 'bool'. Be a bit
+ stricter about checking that bool and _Bool are compatible in C.
+
2016-08-16 Paul Eggert <eggert@cs.ucla.edu>
getdelim: remove dependency on realloc-posix
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
-#serial 6
+#serial 7
# Prepare for substituting <stdbool.h> if it is not supported.
[[
#include <stdbool.h>
- #if __cplusplus < 201103
+ #ifdef __cplusplus
+ typedef bool Bool;
+ #else
+ typedef _Bool Bool;
#ifndef bool
"error: bool is not defined"
#endif
"error: __bool_true_false_are_defined is not defined"
#endif
- struct s { _Bool s: 1; _Bool t; } s;
+ struct s { Bool s: 1; Bool t; bool u: 1; bool v; } s;
char a[true == 1 ? 1 : -1];
char b[false == 0 ? 1 : -1];
char c[__bool_true_false_are_defined == 1 ? 1 : -1];
char d[(bool) 0.5 == true ? 1 : -1];
/* See body of main program for 'e'. */
- char f[(_Bool) 0.0 == false ? 1 : -1];
+ char f[(Bool) 0.0 == false ? 1 : -1];
char g[true];
- char h[sizeof (_Bool)];
+ char h[sizeof (Bool)];
char i[sizeof s.t];
enum { j = false, k = true, l = false * true, m = true * 256 };
/* The following fails for
HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
- _Bool n[m];
+ Bool n[m];
char o[sizeof n == m * sizeof n[0] ? 1 : -1];
- char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+ char p[-1 - (Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
/* Catch a bug in an HP-UX C compiler. See
http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
*/
- _Bool q = true;
- _Bool *pq = &q;
+ Bool q = true;
+ Bool *pq = &q;
+ bool *qq = &q;
]],
[[
bool e = &s;
- *pq |= q;
- *pq |= ! q;
+ *pq |= q; *pq |= ! q;
+ *qq |= q; *qq |= ! q;
/* Refer to every declared value, to avoid compiler optimizations. */
return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
- + !m + !n + !o + !p + !q + !pq);
+ + !m + !n + !o + !p + !q + !pq + !qq);
]])],
[ac_cv_header_stdbool_h=yes],
[ac_cv_header_stdbool_h=no])])