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authorBruno Haible <bruno@clisp.org>2020-08-09 18:55:26 +0200
committerBruno Haible <bruno@clisp.org>2020-08-09 18:55:26 +0200
commit85e2c1bf69761131f77e79246e2ec499b829d01b (patch)
tree60dc9008f690c66096b968123cb276fefd82bad7 /tests/test-stdbool.c
parentc2250fd7f33592b8c2bcbb8c8f27ccd4f75cdf75 (diff)
downloadgnulib-85e2c1bf69761131f77e79246e2ec499b829d01b.tar.gz
stdbool tests: Enable the stricter tests also on clang.
* tests/test-stdbool.c (ADDRESS_CHECK_OKAY): Define also on clang. (e): Enable the address-to-bool conversion test also on clang.
Diffstat (limited to 'tests/test-stdbool.c')
-rw-r--r--tests/test-stdbool.c26
1 files changed, 15 insertions, 11 deletions
diff --git a/tests/test-stdbool.c b/tests/test-stdbool.c
index b128b55d71..4a82146506 100644
--- a/tests/test-stdbool.c
+++ b/tests/test-stdbool.c
@@ -16,14 +16,18 @@
/* 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 if it is OK to assign an address to a 'bool'
+ and this does not generate a warning (because we want this test to succeed
+ even when using gcc's -Werror). */
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) \
+ || (__clang_major__ >= 4)
+/* We can silence the warning. */
+# pragma GCC diagnostic ignored "-Waddress"
# define ADDRESS_CHECK_OKAY
-#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
-/* No way to silence -Waddress. */
+#elif defined __GNUC__ || defined __clang__
+/* There may be a warning. */
#else
-# pragma GCC diagnostic ignored "-Waddress"
+/* Ignore warnings from other compilers. */
# define ADDRESS_CHECK_OKAY
#endif
@@ -52,20 +56,20 @@
/* 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__
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__
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 HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* 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__
+# if defined __GNUC__ || defined __clang__
bool e = &s;
# endif
# endif
@@ -73,7 +77,7 @@ char f[(_Bool) 0.0 == false ? 1 : -1];
#endif
char g[true];
char h[sizeof (_Bool)];
-#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above. */
char i[sizeof s.t];
#endif
enum { j = false, k = true, l = false * true, m = true * 256 };
@@ -92,7 +96,7 @@ main ()
{
int error = 0;
-#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC_ || 4 <= __clang_major___ /* See above. */
# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */
/* A cast from a variable's address to bool is valid in expressions. */
{