random_device::get_entropy() returns 0.0 when _GLIBCXX_USE_DEV_RANDOM
is not defined, but the test expects otherwise. Adjust.
Regstrapped on x86_64-linux-gnu, also tested on aarch64-rtems6. Ok to
install?
for libstdc++-v3/ChangeLog
* testsuite/26_numerics/random/random_device/entropy.cc:
Expect get_entropy to return zero when _GLIBCXX_USE_DEV_RANDOM
is not defined.
---
.../26_numerics/random/random_device/entropy.cc | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc
b/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc
index 9f529f5d81410..3e6872c8a613f 100644
--- a/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc
+++ b/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc
@@ -13,7 +13,13 @@ test01()
VERIFY( std::random_device(token).entropy() == 0.0 );
using result_type = std::random_device::result_type;
+#ifdef _GLIBCXX_USE_DEV_RANDOM
const double max = std::numeric_limits<result_type>::digits;
+#else
+ // random_device::entropy() always returns 0.0 when
+ // _GLIBCXX_USE_DEV_RANDOM is not defined.
+ const double max = 0.0;
+#endif
for (auto token : { "/dev/random", "/dev/urandom" })
if (__gnu_test::random_device_available(token))
@@ -30,7 +36,7 @@ test01()
VERIFY( entropy == max );
}
- for (auto token : { "getentropy", "arc4random" })
+ for (auto token : { "getentropy", "arc4random" })
if (__gnu_test::random_device_available(token))
{
const double entropy = std::random_device(token).entropy();
--
Alexandre Oliva, happy hacker https://FSFLA.org/blogs/lxo/
Free Software Activist GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts. Ask me about <https://stallmansupport.org>
