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-rw-r--r--tests/test-stdbool.c76
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;
}