Further compatibility fixes for GCC 4.8

src/cpp-utils/pointer/gcc_4_8_compatibility.h

@@ -7,10 +7,38 @@
 #if __GNUC__ == 4 && __GNUC_MINOR__ == 8
 // Add std::make_unique
 namespace std {
-    template<typename T, typename... Args>
-    inline unique_ptr<T> make_unique(Args&&... args) {
-        return unique_ptr<T>(new T(std::forward<Args>(args)...));
-    }
+  /// Alias template for remove_extent
+  template<typename _Tp>
+    using remove_extent_t = typename remove_extent<_Tp>::type;
+
+  template<typename _Tp>
+    struct _MakeUniq
+    { typedef unique_ptr<_Tp> __single_object; };
+
+  template<typename _Tp>
+    struct _MakeUniq<_Tp[]>
+    { typedef unique_ptr<_Tp[]> __array; };
+
+  template<typename _Tp, size_t _Bound>
+    struct _MakeUniq<_Tp[_Bound]>
+    { struct __invalid_type { }; };
+
+  /// std::make_unique for single objects
+  template<typename _Tp, typename... _Args>
+    inline typename _MakeUniq<_Tp>::__single_object
+    make_unique(_Args&&... __args)
+    { return unique_ptr<_Tp>(new _Tp(std::forward<_Args>(__args)...)); }
+
+  /// std::make_unique for arrays of unknown bound
+  template<typename _Tp>
+    inline typename _MakeUniq<_Tp>::__array
+    make_unique(size_t __num)
+    { return unique_ptr<_Tp>(new remove_extent_t<_Tp>[__num]()); }
+
+  /// Disable std::make_unique for arrays of known bound
+  template<typename _Tp, typename... _Args>
+    inline typename _MakeUniq<_Tp>::__invalid_type
+    make_unique(_Args&&...) = delete;
 }
 
 #endif

test/blobstore/implementations/onblocks/testutils/BlobStoreTest.cpp

@@ -2,6 +2,7 @@
 
 #include <blockstore/implementations/testfake/FakeBlockStore.h>
 #include "blobstore/implementations/onblocks/BlobStoreOnBlocks.h"
+#include <cpp-utils/pointer/gcc_4_8_compatibility.h>
 
 using blobstore::onblocks::BlobStoreOnBlocks;
 using blockstore::testfake::FakeBlockStore;

test/cpp-utils/system/MemoryTest.cpp

@@ -1,6 +1,7 @@
 #include <gtest/gtest.h>
 #include <cpp-utils/system/memory.h>
 #include <memory>
+#include <cpp-utils/pointer/gcc_4_8_compatibility.h>
 
 using cpputils::DontSwapMemoryRAII;