diff options
Diffstat (limited to 'libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc')
-rw-r--r-- | libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc | 3 |
1 files changed, 2 insertions, 1 deletions
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 63b7043bf9b..9f529f5d814 100644 --- a/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc +++ b/libstdc++-v3/testsuite/26_numerics/random/random_device/entropy.cc @@ -1,6 +1,7 @@ // { dg-do run { target c++11 } } #include <random> +#include <limits> #include <testsuite_hooks.h> #include <testsuite_random.h> @@ -12,7 +13,7 @@ test01() VERIFY( std::random_device(token).entropy() == 0.0 ); using result_type = std::random_device::result_type; - const double max = std::log2(std::numeric_limits<result_type>::max() + 1.0); + const double max = std::numeric_limits<result_type>::digits; for (auto token : { "/dev/random", "/dev/urandom" }) if (__gnu_test::random_device_available(token)) |