Remove logging from benchmark

cpp/bench/CMakeLists.txt

@@ -19,8 +19,8 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(google-benchmark)
 
-add_executable(bench-naive naive.cpp)
-target_link_libraries(bench-naive src-lib benchmark::benchmark_main)
+add_executable(bench-naive naive.cpp main-no-log.cpp)
+target_link_libraries(bench-naive src-lib benchmark::benchmark)
 
 if (ENABLE_CILK)
     add_executable(bench-fftw-cilk fftw-cilk.cpp)

cpp/bench/main-no-log.cpp

@@ -0,0 +1,14 @@
+#include <benchmark/benchmark.h>
+#include <spdlog/cfg/env.h>
+#include <spdlog/spdlog.h>
+
+
+int main(int argc, char **argv) {
+  // No logging in benchmarks (unless overridden via environment variable)
+  spdlog::set_level(spdlog::level::off);
+  spdlog::cfg::load_env_levels();
+
+  benchmark::Initialize(&argc, argv);
+  benchmark::RunSpecifiedBenchmarks();
+  benchmark::Shutdown();
+}