Drop defunct IS_TRIVIALLY_CONSTRUCTIBLE handling from prevector.h

It's now only referenced from the bench, so leave it there. This allows us to
drop the associated includes as well.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/bench/prevector.cpp b/src/bench/prevector.cpp
index 8cc404b9e2..00e5d7e7a0 100644
--- a/src/bench/prevector.cpp
+++ b/src/bench/prevector.cpp
@@ -2,13 +2,21 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <compat.h>
 #include <prevector.h>
 #include <serialize.h>
 #include <streams.h>
+#include <type_traits>
 
 #include <bench/bench.h>
 
+// GCC 4.8 is missing some C++11 type_traits,
+// https://www.gnu.org/software/gcc/gcc-5/changes.html
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 5
+#define IS_TRIVIALLY_CONSTRUCTIBLE std::has_trivial_default_constructor
+#else
+#define IS_TRIVIALLY_CONSTRUCTIBLE std::is_trivially_default_constructible
+#endif
+
 struct nontrivial_t {
     int x;
     nontrivial_t() :x(-1) {}