Fix build with older clang (e.g. 3.8.1).

[simgrid.git] / src / include / xxhash.hpp

diff --git a/src/include/xxhash.hpp b/src/include/xxhash.hpp
index 81e8207..8543ccc 100644 (file)
--- a/src/include/xxhash.hpp
+++ b/src/include/xxhash.hpp
@@ -285,7 +285,7 @@ namespace xxh
 #else
                constexpr endianness get_endian(endianness endian)
                {
-                       constexpr std::array<endianness, 3> endian_lookup = { endianness::big_endian, endianness::little_endian, (XXH_CPU_LITTLE_ENDIAN) ? endianness::little_endian : endianness::big_endian };
+                       constexpr std::array<endianness, 3> endian_lookup = {{ endianness::big_endian, endianness::little_endian, (XXH_CPU_LITTLE_ENDIAN) ? endianness::little_endian : endianness::big_endian }};
                        return endian_lookup[static_cast<uint8_t>(endian)];
                }
 
@@ -345,8 +345,8 @@ namespace xxh
                *  Hash functions - Implementation
                *********************************************************************/
 
-               constexpr static std::array<hash32_t, 5> primes32 = { 2654435761U, 2246822519U, 3266489917U, 668265263U, 374761393U };
-               constexpr static std::array<hash64_t, 5> primes64 = { 11400714785074694791ULL, 14029467366897019727ULL, 1609587929392839161ULL, 9650029242287828579ULL, 2870177450012600261ULL };
+               constexpr static std::array<hash32_t, 5> primes32 = {{ 2654435761U, 2246822519U, 3266489917U, 668265263U, 374761393U }};
+               constexpr static std::array<hash64_t, 5> primes64 = {{ 11400714785074694791ULL, 14029467366897019727ULL, 1609587929392839161ULL, 9650029242287828579ULL, 2870177450012600261ULL }};
 
                template <size_t N>
                constexpr hash_t<N> PRIME(int32_t n) {};
@@ -381,7 +381,13 @@ namespace xxh
                }
 
                template <size_t N>
-               inline void endian_align_sub_mergeround([[maybe_unused]] hash_t<N>& hash_ret, hash_t<N> v1, hash_t<N> v2, hash_t<N> v3, hash_t<N> v4) {};
+               inline void endian_align_sub_mergeround(
+#if __cplusplus < 201703L
+                 __attribute__((unused))
+#else
+                 [[maybe_unused]]
+#endif
+                 hash_t<N>& hash_ret, hash_t<N> v1, hash_t<N> v2, hash_t<N> v3, hash_t<N> v4) {};
 
                template <>
                inline void endian_align_sub_mergeround<64>(hash_t<64>& hash_ret, hash_t<64> v1, hash_t<64> v2, hash_t<64> v3, hash_t<64> v4)