diff options
Diffstat (limited to 'm4/stdbool.m4')
| -rw-r--r-- | m4/stdbool.m4 | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/m4/stdbool.m4 b/m4/stdbool.m4 index a55615318..d36812336 100644 --- a/m4/stdbool.m4 +++ b/m4/stdbool.m4 @@ -1,11 +1,11 @@ # Check for stdbool.h that conforms to C99. -dnl Copyright (C) 2002-2006, 2009-2016 Free Software Foundation, Inc. +dnl Copyright (C) 2002-2006, 2009-2017 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation 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. @@ -44,7 +44,10 @@ AC_DEFUN([AC_CHECK_HEADER_STDBOOL], [[ #include <stdbool.h> - #if __cplusplus < 201103 + #ifdef __cplusplus + typedef bool Bool; + #else + typedef _Bool Bool; #ifndef bool "error: bool is not defined" #endif @@ -66,37 +69,38 @@ AC_DEFUN([AC_CHECK_HEADER_STDBOOL], "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])]) |