Benchmarks: switch RegisterBenchmarkInternal to std::unique_ptr

Adapting to new google benchmark requirements of >= v1.9.2. See
google/benchmark#1927

Author: r-devulap

README.md

@@ -78,9 +78,9 @@ Once installed, you can use `pkg-config --cflags --libs x86simdsortcpp` to
 populate the right cflags and ldflags to compile and link your C++ program.
 This repository also contains a test suite and benchmarking suite which are
 written using [googletest](https://github.com/google/googletest) and [google
-benchmark](https://github.com/google/benchmark) frameworks respectively. You
-can configure meson to build them both by using `-Dbuild_tests=true` and
-`-Dbuild_benchmarks=true`.
+benchmark](https://github.com/google/benchmark) (>= v1.9.2) frameworks
+respectively. You can configure meson to build them both by using
+`-Dbuild_tests=true` and `-Dbuild_benchmarks=true`.
 
 ## Build using OpenMP
 

benchmarks/bench.h

@@ -5,11 +5,12 @@
 #define MY_BENCHMARK_CAPTURE(func, T, test_case_name, ...) \
     BENCHMARK_PRIVATE_DECLARE(func) \
             = (::benchmark::internal::RegisterBenchmarkInternal( \
+                std::unique_ptr<benchmark::internal::Benchmark>( \
                     new ::benchmark::internal::FunctionBenchmark( \
                             #func "/" #test_case_name "/" #T, \
                             [](::benchmark::State &st) { \
                                 func<T>(st, __VA_ARGS__); \
-                            })))
+                            }))))
 
 #define BENCH_SORT(func, type) \
     MY_BENCHMARK_CAPTURE(func, type, random_128, 128, std::string("random")); \