diff options
Diffstat (limited to 'tests/test-stdbool.c')
| -rw-r--r-- | tests/test-stdbool.c | 76 |
1 files changed, 49 insertions, 27 deletions
diff --git a/tests/test-stdbool.c b/tests/test-stdbool.c index fcb534de..1da25d07 100644 --- a/tests/test-stdbool.c +++ b/tests/test-stdbool.c @@ -1,5 +1,5 @@ /* Test of <stdbool.h> substitute. - Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc. + Copyright (C) 2002-2007, 2009-2015 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -16,6 +16,17 @@ /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ +/* We want this test to succeed even when using gcc's -Werror; but to + do that requires a pragma that didn't exist before 4.3.0. */ +#ifndef __GNUC__ +# define ADDRESS_CHECK_OKAY +#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3) +/* No way to silence -Waddress. */ +#else +# pragma GCC diagnostic ignored "-Waddress" +# define ADDRESS_CHECK_OKAY +#endif + #include <config.h> #include <stdbool.h> @@ -39,49 +50,36 @@ "error: __bool_true_false_are_defined is not defined" #endif -#if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>. */ +/* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at + least, not for all compilers and compiler options. */ +#if HAVE_STDBOOL_H || 3 <= __GNUC__ struct s { _Bool s: 1; _Bool t; } s; #endif char a[true == 1 ? 1 : -1]; char b[false == 0 ? 1 : -1]; char c[__bool_true_false_are_defined == 1 ? 1 : -1]; -#if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>, at least, -not for all compilers. */ +#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */ char d[(bool) 0.5 == true ? 1 : -1]; +# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */ +/* C99 may plausibly be interpreted as not requiring support for a cast from + a variable's address to bool in a static initializer. So treat it like a + GCC extension. */ +# ifdef __GNUC__ bool e = &s; +# endif +# endif char f[(_Bool) 0.0 == false ? 1 : -1]; #endif char g[true]; char h[sizeof (_Bool)]; -#if 0 /* See above. */ +#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */ char i[sizeof s.t]; #endif enum { j = false, k = true, l = false * true, m = true * 256 }; _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]; -#if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>. */ -#if defined __xlc__ || defined __GNUC__ - /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 - reported by James Lemley on 2005-10-05; see - http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html - This test is not quite right, since xlc is allowed to - reject this program, as the initializer for xlcbug is - not one of the forms that C requires support for. - However, doing the test right would require a run-time - test, and that would make cross-compilation harder. - Let us hope that IBM fixes the xlc bug, and also adds - support for this kind of constant expression. In the - meantime, this test will reject xlc, which is OK, since - our stdbool.h substitute should suffice. We also test - this with GCC, where it should work, to detect more - quickly whether someone messes up the test in the - future. */ - char digs[] = "0123456789"; - int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1); -#endif -#endif /* 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 @@ -92,5 +90,29 @@ _Bool *pq = &q; int main () { - return 0; + int error = 0; + +#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */ +# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */ + /* A cast from a variable's address to bool is valid in expressions. */ + { + bool e1 = &s; + if (!e1) + error = 1; + } +# endif +#endif + + /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 + reported by James Lemley on 2005-10-05; see + http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html + This is a runtime test, since a corresponding compile-time + test would rely on initializer extensions. */ + { + char digs[] = "0123456789"; + if (&(digs + 5)[-2 + (bool) 1] != &digs[4]) + error = 1; + } + + return error; } |