fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R)

Signed-off-by: Martin Filla <freebsd@sysctl.cz>

Author: Martinfx

src/common/cpuinfo/CpuInfo.cpp

@@ -60,6 +60,7 @@
 #elif (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__APPLE__)) && defined(__aarch64__)
 #include <sys/sysctl.h>
 #include <sys/types.h>
+#include <unistd.h>
 #endif /* defined(__APPLE__) && defined(__aarch64__)) */
 #endif /* !defined(BARE_METAL) && !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__QNX__) && (defined(__arm__) || defined(__aarch64__)) */
 
@@ -438,7 +439,8 @@ CpuInfo CpuInfo::build()
 
 #elif defined(__aarch64__) && (defined(__OpenBSD__) || defined(__FreeBSD__))
     /* #elif(BARE_METAL) && defined(__aarch64__) */
-    int ncpus = get_hw_capability("hw.ncpu");
+    int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
+
     CpuIsaInfo            isainfo;
     std::vector<CpuModel> cpus_model(ncpus);
     isainfo.neon       = get_hw_capability("hw.optional.neon");