diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84e52d41a..5e47edcca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -498,6 +498,17 @@ else()
     set(ARCH_FLAG "-march=armv8")
   else()
     set(ARCH_FLAG "-march=${ARCH}")
+    if(ARCH STREQUAL "native")
+      check_c_compiler_flag(-march=native CC_SUPPORTS_MARCH_NATIVE)
+      if (NOT CC_SUPPORTS_MARCH_NATIVE)
+        check_c_compiler_flag(-mtune=native CC_SUPPORTS_MTUNE_NATIVE)
+        if (CC_SUPPORTS_MTUNE_NATIVE)
+          set(ARCH_FLAG "-mtune=${ARCH}")
+        else()
+          set(ARCH_FLAG "")
+        endif()
+      endif()
+    endif()
   endif()
   set(WARNINGS "-Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Wno-error=extra -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-unused-variable -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized")
   if(NOT MINGW)
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 1fc4d64c1..358d47a4f 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -47,6 +47,9 @@ if(MSVC)
 elseif(NOT MSVC)
   set_property(TARGET libminiupnpc-static APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-undef -Wno-unused-result -Wno-unused-value")
 endif()
+if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
+	set_property(TARGET libminiupnpc-static APPEND_STRING PROPERTY COMPILE_FLAGS " -D_NETBSD_SOURCE")
+endif()
 
 set(UPNP_LIBRARIES "libminiupnpc-static" PARENT_SCOPE)
 
diff --git a/external/db_drivers/CMakeLists.txt b/external/db_drivers/CMakeLists.txt
index 13f70aa40..d537ec029 100644
--- a/external/db_drivers/CMakeLists.txt
+++ b/external/db_drivers/CMakeLists.txt
@@ -32,3 +32,6 @@ message(STATUS "Using ${ARCH_WIDTH}-bit LMDB from source tree")
 add_subdirectory(liblmdb)
 set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb" CACHE STRING "LMDB Include path")
 set(LMDB_LIBRARY "lmdb" CACHE STRING "LMDB Library name")
+if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
+	set_property(TARGET lmdb APPEND_STRING PROPERTY COMPILE_FLAGS " -D_SEM_SEMUN_UNDEFINED")
+endif()
diff --git a/external/easylogging++/easylogging++.h b/external/easylogging++/easylogging++.h
index 193f835b0..8e8b7094b 100644
--- a/external/easylogging++/easylogging++.h
+++ b/external/easylogging++/easylogging++.h
@@ -104,6 +104,11 @@
 #else
 #  define ELPP_OS_OPENBSD 0
 #endif
+#if (defined(__NetBSD__))
+#  define ELPP_OS_NETBSD 1
+#else
+#  define ELPP_OS_NETBSD 0
+#endif
 #if (defined(__sun))
 #  define ELPP_OS_SOLARIS 1
 #else
@@ -115,7 +120,7 @@
 #   define ELPP_OS_DRAGONFLY 0
 #endif
 // Unix
-#if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_SOLARIS || ELPP_OS_DRAGONFLY || ELPP_OS_OPENBSD) && (!ELPP_OS_WINDOWS))
+#if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_SOLARIS || ELPP_OS_DRAGONFLY || ELPP_OS_OPENBSD || ELPP_OS_NETBSD ) && (!ELPP_OS_WINDOWS))
 #  define ELPP_OS_UNIX 1
 #else
 #  define ELPP_OS_UNIX 0
@@ -200,7 +205,7 @@ ELPP_INTERNAL_DEBUGGING_OUT_INFO << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStre
 #  define ELPP_INTERNAL_INFO(lvl, msg)
 #endif  // (defined(ELPP_DEBUG_INFO))
 #if (defined(ELPP_FEATURE_ALL)) || (defined(ELPP_FEATURE_CRASH_LOG))
-#  if (ELPP_COMPILER_GCC && !ELPP_MINGW && !ELPP_OS_OPENBSD)
+#  if (ELPP_COMPILER_GCC && !ELPP_MINGW && !ELPP_OS_OPENBSD && !ELPP_OS_NETBSD)
 #    define ELPP_STACKTRACE 1
 #  else
 #    define ELPP_STACKTRACE 0
diff --git a/src/crypto/oaes_lib.c b/src/crypto/oaes_lib.c
index 9e31ebf46..210f5d43a 100644
--- a/src/crypto/oaes_lib.c
+++ b/src/crypto/oaes_lib.c
@@ -33,14 +33,15 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-// OS X, FreeBSD, and OpenBSD don't need malloc.h
+// OS X, FreeBSD, OpenBSD and NetBSD don't need malloc.h
 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__OpenBSD__) \
-  && !defined(__DragonFly__)
+  && !defined(__DragonFly__) && !defined(__NetBSD__)
  #include <malloc.h>
 #endif
 
-// ANDROID, FreeBSD, and OpenBSD also don't need timeb.h
-#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__)
+// ANDROID, FreeBSD, OpenBSD and NetBSD also don't need timeb.h
+#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__) \
+  && !defined(__NetBSD__)
  #include <sys/timeb.h>
 #else
  #include <sys/time.h>
@@ -473,7 +474,7 @@ OAES_RET oaes_sprintf(
 #ifdef OAES_HAVE_ISAAC
 static void oaes_get_seed( char buf[RANDSIZ + 1] )
 {
-        #if !defined(__FreeBSD__) && !defined(__OpenBSD__)
+        #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
 	struct timeb timer;
 	struct tm *gmTimer;
 	char * _test = NULL;
@@ -505,7 +506,7 @@ static void oaes_get_seed( char buf[RANDSIZ + 1] )
 #else
 static uint32_t oaes_get_seed(void)
 {
-        #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__)
+        #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__) && !defined(__NetBSD__)
 	struct timeb timer;
 	struct tm *gmTimer;
 	char * _test = NULL;
diff --git a/src/crypto/slow-hash.c b/src/crypto/slow-hash.c
index a4d2b58de..914ba6dc0 100644
--- a/src/crypto/slow-hash.c
+++ b/src/crypto/slow-hash.c
@@ -604,7 +604,7 @@ void slow_hash_allocate_state(void)
                                         MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
 #else
 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || \
-  defined(__DragonFly__)
+  defined(__DragonFly__) || defined(__NetBSD__)
     hp_state = mmap(0, MEMORY, PROT_READ | PROT_WRITE,
                     MAP_PRIVATE | MAP_ANON, 0, 0);
 #else
diff --git a/src/crypto/tree-hash.c b/src/crypto/tree-hash.c
index 57c38b86b..b2dc3ffb2 100644
--- a/src/crypto/tree-hash.c
+++ b/src/crypto/tree-hash.c
@@ -36,7 +36,8 @@
 
 #ifdef _MSC_VER
 #include <malloc.h>
-#elif !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__)
+#elif !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__) \
+  && !defined(__NetBSD__)
  #include <alloca.h>
 #else
  #include <stdlib.h>