#749 Use HWCAP to detect AES feature on ARMv8, thanks @lhirlimann.

CMakeLists.txt

@@ -11,7 +11,7 @@ option(WITH_DEBUG_LOG "Enable debug log output" OFF)
 option(WITH_TLS       "Enable OpenSSL support" ON)
 option(WITH_ASM       "Enable ASM PoW implementations" ON)
 option(BUILD_STATIC   "Build static binary" OFF)
-option(ARM_TARGET    "Force use specific ARM target 8 or 7" 0)
+option(ARM_TARGET     "Force use specific ARM target 8 or 7" 0)
 
 include (CheckIncludeFile)
 include (cmake/cpu.cmake)

src/common/cpu/BasicCpuInfo_arm.cpp

@@ -25,6 +25,11 @@
 #include <string.h>
 #include <thread>
 
+#if __ARM_FEATURE_CRYPTO
+#   include <sys/auxv.h>
+#   include <asm/hwcap.h>
+#endif
+
 
 #include "common/cpu/BasicCpuInfo.h"
 
@@ -35,10 +40,14 @@ xmrig::BasicCpuInfo::BasicCpuInfo() :
     m_brand(),
     m_threads(std::thread::hardware_concurrency())
 {
-    memcpy(m_brand, "Unknown", 7);
+#   ifdef XMRIG_ARMv8
+    memcpy(m_brand, "ARMv8", 5);
+#   else
+    memcpy(m_brand, "ARMv7", 5);
+#   endif
 
 #   if __ARM_FEATURE_CRYPTO
-    m_aes = true;
+    m_aes = getauxval(AT_HWCAP) & HWCAP_AES;
 #   endif
 }