Replace usage of deprecated sysctl on macOS (#1919)

brad0 · web-flow · commit faaa266d33ff · 2025-02-06T10:53:21.000Z
The use of the sysctl hw.ncpu has long been deprecated and
should be replaced by hw.logicalcpu.
diff --git a/src/sysinfo.cc b/src/sysinfo.cc
@@ -483,7 +483,9 @@ int GetNumCPUsImpl() {
 #ifdef BENCHMARK_HAS_SYSCTL
   int num_cpu = -1;
   constexpr auto* hwncpu =
-#ifdef HW_NCPUONLINE
+#if defined BENCHMARK_OS_MACOSX
+      "hw.logicalcpu";
+#elif defined(HW_NCPUONLINE)
       "hw.ncpuonline";
 #else
       "hw.ncpu";
