diff --git a/.appveyor.yml b/.appveyor.yml
index 9e3436010..66d4e80ed 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -14,7 +14,7 @@ environment:
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2019'
       configuration: Release
       CMAKE_CUSTOM_OPTIONS: "-DCMAKE_BUILD_TYPE=Release \
-                             -DFORCE_SSE41=ON \
+                             -DARCH_OPT=SSE4_2 \
                              -DDEBUG_OUTPUT=ON \
                              -DENABLE_MIRISDR=OFF \
                              -DBUILD_SERVER=OFF \
@@ -25,7 +25,7 @@ environment:
       CC:  "gcc-9"
       CXX: "g++-9"
       CMAKE_CUSTOM_OPTIONS: "-DCMAKE_BUILD_TYPE=Release \
-                             -DFORCE_SSE41=ON \
+                             -DARCH_OPT=nehalem \
                              -DDEBUG_OUTPUT=ON \
                              -DENABLE_EXTERNAL_LIBRARIES=ON \
                              -DBUILD_SERVER=OFF"
@@ -86,7 +86,7 @@ for:
             libopus-dev libcodec2-dev libairspy-dev libhackrf-dev \
             libbladerf-dev libsoapysdr-dev libiio-dev libuhd-dev \
             python3-mako python3-cheetah python3-numpy \
-            autoconf automake libtool ninja-build
+            autoconf automake libtool ninja-build libclang1-9
       - sh: if [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_cm256cc.sh; fi
       - sh: if [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_mbelib.sh; fi
       - sh: if [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_serialdv.sh; fi
diff --git a/.travis.yml b/.travis.yml
index 5748a018b..2b1625359 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -85,4 +85,4 @@ script:
   - bash -c pwd
   - bash cmake/ci/build_sdrangel.sh
 env:
-  - CMAKE_CUSTOM_OPTIONS="-DFORCE_SSE41=ON -DBUNDLE=ON -DENABLE_PACK_MIRSDRAPI=ON"
+  - CMAKE_CUSTOM_OPTIONS="-DARCH_OPT=nehalem -DBUNDLE=ON -DENABLE_PACK_MIRSDRAPI=ON"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e48c369c4..9ca27aa96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,8 +27,8 @@ option(BUILD_SERVER "Build Server" ON)
 option(BUILD_GUI "Build GUI" ON)
 option(HIDE_CONSOLE "Hide console when running GUI on Windows" ON)
 option(BUNDLE "Enable distribution bundle" OFF)
-option(FORCE_SSSE3 "Compile with SSSE3 instruction only" OFF)
-option(FORCE_SSE41 "Compile with SSE4.1 instruction only" OFF)
+set(ARCH_OPT "native" CACHE STRING "Specify instruction set to use. Will be passed directly as `-march` or `/arch:` argument on supported compilers. \
+                                   'native' option will figure out host machine compatibilities and set flags accordingly (even with MSVC).")
 option(ENABLE_AIRSPY "Enable AirSpy support" ON)
 option(ENABLE_AIRSPYHF "Enable AirSpyHF support" ON)
 option(ENABLE_BLADERF "Enable bladeRF support" ON)
@@ -208,11 +208,6 @@ elseif (WIN32)
     message(FATAL_ERROR "You must use Microsoft Visual Studio 2015, 2017 or 2019 as compiler")
   endif()
 
-  # compile with full multicore
-  if(MSVC)
-    add_compile_options(/MP)
-  endif()
-
   # in alternative we can use ExternalProject
   set(EXTERNAL_LIBRARY_FOLDER "${CMAKE_SOURCE_DIR}/external/windows")
   set(FFTW3F_FOUND ON CACHE INTERNAL "")
@@ -281,45 +276,11 @@ set(CMAKE_INSTALL_NAME_DIR
 # enable 24 bit receiving path
 if (RX_SAMPLE_24BIT)
     message(STATUS "Compiling for 24 bit Rx DSP chain")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSDR_RX_SAMPLE_24BIT")
+    add_compile_definitions(SDR_RX_SAMPLE_24BIT)
 else()
     message(STATUS "Compiling for 16 bit Rx DSP chain")
 endif()
 
-if (SANITIZE_ADDRESS)
-    message(STATUS "Activate address sanitization")
-    if(MSVC)
-      set(ASAN_LIB_ARCH ${MSVC_CXX_ARCHITECTURE_ID})
-      string(TOLOWER ${ASAN_LIB_ARCH} ASAN_LIB_ARCH)
-      if(ASAN_LIB_ARCH STREQUAL "x86")
-        set(ASAN_LIB_ARCH "i386")
-      elseif(ASAN_LIB_ARCH STREQUAL "x64")
-        set(ASAN_LIB_ARCH "x86_64")
-      endif()
-      add_compile_options(/fsanitize=address)
-      link_libraries(clang_rt.asan_dynamic-${ASAN_LIB_ARCH} clang_rt.asan_dynamic_runtime_thunk-${ASAN_LIB_ARCH})
-      add_link_options(/wholearchive:clang_rt.asan_dynamic_runtime_thunk-${ASAN_LIB_ARCH}.lib)
-    else()
-      add_compile_options(-fsanitize=address -fno-omit-frame-pointer -g)
-      add_link_options(-fsanitize=address)
-    endif()
-endif()
-
-# set compiler
-include(FindCompiler)
-
-if (C_CLANG OR C_GCC)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wvla -Woverloaded-virtual -ffast-math -ftree-vectorize ${EXTRA_FLAGS}")
-elseif (C_MSVC)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w -MP ${EXTRA_FLAGS}")
-endif()
-
-if (C_CLANG)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ferror-limit=1")
-elseif (C_GCC)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fmax-errors=1")
-endif()
-
 # find cpu flags (and set compiler)
 include(FindCPUflags)
 
@@ -460,13 +421,7 @@ add_subdirectory(logging)
 add_subdirectory(qrtplib)
 add_subdirectory(swagger)
 add_subdirectory(devices)
-
-# strange symbol dependency
-#  mainbench.obj : error LNK2001: unresolved external
-#  symbol "public: static float const decimation_scale<12>::scaleIn" (?scaleIn@?$decimation_scale@$0M@@@2MB)
-if(NOT WIN32)
-  add_subdirectory(sdrbench)
-endif()
+add_subdirectory(sdrbench)
 
 if (BUILD_GUI)
     add_subdirectory(sdrgui)
@@ -533,21 +488,19 @@ else()
 endif()
 
 ############ build sdrangel benchmark ################
-if(NOT WIN32)
-  set(sdrangelbench_SOURCES
-    appbench/main.cpp
-  )
+set(sdrangelbench_SOURCES
+  appbench/main.cpp
+)
 
-  add_executable(sdrangelbench
-    ${sdrangelbench_SOURCES}
-  )
+add_executable(sdrangelbench
+  ${sdrangelbench_SOURCES}
+)
 
-  target_link_libraries(sdrangelbench
-    Qt5::Multimedia
-    sdrbench
-    logging
-  )
-endif()
+target_link_libraries(sdrangelbench
+  Qt5::Multimedia
+  sdrbench
+  logging
+)
 ############ build sdrangel gui ################
 if (BUILD_GUI)
     set(sdrangel_SOURCES
@@ -593,9 +546,7 @@ if (BUILD_SERVER)
 endif()
 
 ############ install ##################
-if(NOT WIN32)
-  install(TARGETS sdrangelbench DESTINATION ${INSTALL_BIN_DIR})
-endif()
+install(TARGETS sdrangelbench DESTINATION ${INSTALL_BIN_DIR})
 if (BUILD_GUI)
       install(TARGETS ${CMAKE_PROJECT_NAME} DESTINATION ${INSTALL_BIN_DIR})
 endif()
diff --git a/appbench/main.cpp b/appbench/main.cpp
index 0c91a875c..be8005a0d 100644
--- a/appbench/main.cpp
+++ b/appbench/main.cpp
@@ -21,20 +21,22 @@
 #include <QSysInfo>
 #include <QTimer>
 
-#include <signal.h>
-#include <unistd.h>
 #include <vector>
 
 #include "loggerwithfile.h"
 #include "mainbench.h"
 #include "dsp/dsptypes.h"
 
+#ifndef _WIN32
+
+#include <signal.h>
+#include <unistd.h>
+
 void handler(int sig) {
     fprintf(stderr, "quit the application by signal(%d).\n", sig);
     QCoreApplication::quit();
 }
 
-#ifndef _WIN32
 void catchUnixSignals(const std::vector<int>& quitSignals) {
     sigset_t blocking_mask;
     sigemptyset(&blocking_mask);
diff --git a/cmake/Modules/FindCPUflags.cmake b/cmake/Modules/FindCPUflags.cmake
index 0d2dd2971..82ca3c2ef 100644
--- a/cmake/Modules/FindCPUflags.cmake
+++ b/cmake/Modules/FindCPUflags.cmake
@@ -1,266 +1,241 @@
-# Clang or AppleClang (see CMP0025)
-if(NOT DEFINED C_CLANG AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+include_guard(GLOBAL)
+
+include(CheckCXXCompilerFlag)
+include(CheckSymbolExists)
+include(CMakePushCheckState)
+
+set(TEST_DIR ${PROJECT_SOURCE_DIR}/cmake/test)
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     set(C_CLANG 1)
-elseif(NOT DEFINED C_GCC AND CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+elseif(MAKE_CXX_COMPILER_ID MATCHES "GNU")
     set(C_GCC 1)
-elseif(NOT DEFINED C_MSVC AND CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     set(C_MSVC 1)
 endif()
 
 # Detect current compilation architecture and create standard definitions
-include(CheckSymbolExists)
-function(detect_architecture symbol arch)
+macro(detect_architecture symbol arch)
     if (NOT DEFINED ARCHITECTURE)
-        set(CMAKE_REQUIRED_QUIET 1)
         check_symbol_exists("${symbol}" "" ARCHITECTURE_${arch})
-        unset(CMAKE_REQUIRED_QUIET)
 
-        # The output variable needs to be unique across invocations otherwise
-        # CMake's crazy scope rules will keep it defined
         if (ARCHITECTURE_${arch})
-            set(ARCHITECTURE "${arch}" PARENT_SCOPE)
-            set(ARCHITECTURE_${arch} 1 PARENT_SCOPE)
-            add_definitions(-DARCHITECTURE_${arch}=1)
+            set(ARCHITECTURE ${arch})
+            set(ARCHITECTURE_${arch} TRUE)
+            add_compile_definitions(ARCHITECTURE_${arch})
         endif()
     endif()
+endmacro()
+
+macro(force_ext_available extension)
+  message(STATUS "Looking for __${extension}__ - forced found")
+  set(HAS_${extension} 1 CACHE INTERNAL "")
+endmacro()
+
+function(detect_extensions extension)
+  unset(HAS_${extension})
+  if (ARGC EQUAL 2 AND (${ARGV1})) # force available
+    force_ext_available(${extension})
+  endif()
+  check_symbol_exists("__${extension}__" "" HAS_${extension})
+  if (HAS_${extension})
+    add_compile_definitions(USE_${extension})
+  endif()
 endfunction()
 
-if (NOT ENABLE_GENERIC)
-    if (C_MSVC)
-        detect_architecture("_M_AMD64" x86_64)
-        detect_architecture("_M_IX86" x86)
-        detect_architecture("_M_ARM" ARM)
-        detect_architecture("_M_ARM64" ARM64)
-    else()
-        detect_architecture("__x86_64__" x86_64)
-        detect_architecture("__i386__" x86)
-        detect_architecture("__arm__" ARM)
-        detect_architecture("__aarch64__" ARM64)
-    endif()
+function(detect_msvc_native_opt)
+  try_run(RUN_AVX512 COMPILE_AVX512 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx512.cxx" COMPILE_DEFINITIONS /arch:AVX512)
+  if (COMPILE_AVX512 AND RUN_AVX512 EQUAL 0)
+    set(ARCH_OPT "AVX512" PARENT_SCOPE)
+    return()
+  endif()
+  try_run(RUN_AVX2 COMPILE_AVX2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx2.cxx" COMPILE_DEFINITIONS /arch:AVX2)
+  if (COMPILE_AVX2 AND RUN_AVX2 EQUAL 0)
+    set(ARCH_OPT "AVX2" PARENT_SCOPE)
+    return()
+  endif()
+  try_run(RUN_AVX COMPILE_AVX "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx.cxx" COMPILE_DEFINITIONS /arch:AVX)
+  if (COMPILE_AVX AND RUN_AVX EQUAL 0)
+    set(ARCH_OPT "AVX" PARENT_SCOPE)
+    return()
+  endif()
+
+  # Supporting 32-bit x86, what year is it?
+  set(COMPILE_DEF "")
+  set(ARCH_OPT "" PARENT_SCOPE)
+  if (ARCHITECTURE_x86)
+    set(COMPILE_DEF "/arch:SSE2")
+    set(ARCH_OPT "SSE2" PARENT_SCOPE)
+  endif()
+
+  try_run(RUN_SSE42 COMPILE_SSE42 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse42.cxx" COMPILE_DEFINITIONS ${COMPILE_DEF})
+  if (COMPILE_SSE42 AND RUN_SSE42 EQUAL 0)
+    force_ext_available(SSE4_2)
+    return()
+  endif()
+  try_run(RUN_SSE41 COMPILE_SSE41 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse41.cxx" COMPILE_DEFINITIONS ${COMPILE_DEF})
+  if (COMPILE_SSE41 AND RUN_SSE41 EQUAL 0)
+    force_ext_available(SSE4_1)
+    return()
+  endif()
+  try_run(RUN_SSSE3 COMPILE_SSSE3 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_ssse3.cxx" COMPILE_DEFINITIONS ${COMPILE_DEF})
+  if (COMPILE_SSSE3 AND RUN_SSSE3 EQUAL 0)
+    force_ext_available(SSSE3)
+    return()
+  endif()
+  try_run(RUN_SSE3 COMPILE_SSE3 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse3.cxx" COMPILE_DEFINITIONS ${COMPILE_DEF})
+  if (COMPILE_SSE3 AND RUN_SSE3 EQUAL 0)
+    force_ext_available(SSE3)
+    return()
+  endif()
+  try_run(RUN_SSE2 COMPILE_SSE2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse2.cxx" COMPILE_DEFINITIONS ${COMPILE_DEF})
+  if (COMPILE_SSE2 AND RUN_SSE2 EQUAL 0)
+    force_ext_available(SSE2)
+    return()
+  endif()
+
+  if (ARCHITECTURE_x86)
+    # At this point we might as well...
+    set(ARCH_OPT "IA32" PARENT_SCOPE)
+    return()
+  endif()
+endfunction()
+
+if (C_MSVC)
+    detect_architecture("_M_AMD64" x86_64)
+    detect_architecture("_M_IX86" x86)
+    detect_architecture("_M_ARM" ARM)
+    detect_architecture("_M_ARM64" ARM64)
+else()
+    detect_architecture("__x86_64__" x86_64)
+    detect_architecture("__i386__" x86)
+    detect_architecture("__arm__" ARM)
+    detect_architecture("__aarch64__" ARM64)
 endif()
 if (NOT DEFINED ARCHITECTURE)
-    set(ARCHITECTURE "GENERIC")
-    set(ARCHITECTURE_GENERIC 1)
-    add_definitions(-DARCHITECTURE_GENERIC=1)
+  message(FATAL_ERROR "Not supported. Please add needed architecture detection.")
 endif()
-message(STATUS "Target architecture: ${ARCHITECTURE}")
 
-set(TEST_DIR ${PROJECT_SOURCE_DIR}/cmake/test)
+# Note: On x86 MSVC's /arch:SSE2 enables all SSE intrinsics support and is default option.
+#       On x86_64 MSVC's SSE is supported and enabled, so only AVX selection is needed.
 
-# flag that set the minimum cpu flag requirements
-# used to create re-distribuitable binary
-if (${ARCHITECTURE} MATCHES "x86_64|x86" AND (FORCE_SSSE3 OR FORCE_SSE41))
-    if (FORCE_SSSE3)
-        set(HAS_SSSE3 ON CACHE BOOL "SSSE3 SIMD enabled")
-        if(C_GCC OR C_CLANG)
-            set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mssse3" )
-            message(STATUS "Use SSSE3 SIMD instructions")
-            add_definitions(-DUSE_SSSE3)
-        elseif(C_MSVC)
-            set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" )
-            set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-            set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-            message(STATUS "Use MSVC SSSE3 SIMD instructions")
-            add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-            add_definitions(-DUSE_SSSE3)
-        endif()
-    elseif (FORCE_SSE41)
-       set(HAS_SSSE3 ON CACHE BOOL "SSSE3 SIMD enabled")
-       set(HAS_SSE4_1 ON CACHE BOOL "Architecture has SSE 4.1 SIMD enabled")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -msse4.1" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -msse4.1" )
-           message(STATUS "Use SSE 4.1 SIMD instructions")
-           add_definitions(-DUSE_SSSE3)
-           add_definitions(-DUSE_SSE4_1)
-       elseif(C_MSVC)
-           # seems that from MSVC 2015 comiler doesn't support those flags
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" )
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           message(STATUS "Use SSE 4.1 SIMD instructions")
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_SSSE3)
-           add_definitions(-DUSE_SSE4_1)
-       endif()
+if (FORCE_SSSE3)
+  message(WARNING "FORCE_SSSE3 flag is deprecated, please use ARCH_OPT option.")
+  set(ARCH_OPT "")
+  if (C_MSVC)
+    if (ARCHITECTURE_x86)
+      set(ARCH_OPT "SSE2")
     endif()
-else ()
-if (${ARCHITECTURE} MATCHES "x86_64|x86")
-    if(C_MSVC)
-       try_run(RUN_SSE2 COMPILE_SSE2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse2.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-       try_run(RUN_SSE2 COMPILE_SSE2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse2.cxx" COMPILE_DEFINITIONS -msse2 -O0)
-    endif()
-    if(COMPILE_SSE2 AND RUN_SSE2 EQUAL 0)
-       set(HAS_SSE2 ON CACHE BOOL "Architecture has SSSE2 SIMD enabled")
-       message(STATUS "Use SSE2 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse2" )
-           add_definitions(-DUSE_SSE2)
-       elseif(C_MSVC)
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" )
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_SSE2)
-       endif()
-    else()
-       set(HAS_SSE2 OFF CACHE BOOL "Architecture does not have SSSE2 SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_SSSE3 COMPILE_SSSE3 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_ssse3.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_SSSE3 COMPILE_SSSE3 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_ssse3.cxx" COMPILE_DEFINITIONS -mssse3 -O0)
-    endif()
-    if(COMPILE_SSSE3 AND RUN_SSSE3 EQUAL 0)
-       set(HAS_SSSE3 ON CACHE BOOL "Architecture has SSSE3 SIMD enabled")
-       message(STATUS "Use SSSE3 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mssse3" )
-           add_definitions(-DUSE_SSSE3)
-       elseif(C_MSVC)
-           # seems not present on MSVC 2017
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_SSSE3)
-       endif()
-    else()
-       set(HAS_SSSE3 OFF CACHE BOOL "Architecture does not have SSSE3 SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_SSE4_1 COMPILE_SSE4_1 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse41.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_SSE4_1 COMPILE_SSE4_1 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse41.cxx" COMPILE_DEFINITIONS -msse4.1 -O0)
-    endif()
-    if(COMPILE_SSE4_1 AND RUN_SSE4_1 EQUAL 0)
-       set(HAS_SSE4_1 ON CACHE BOOL "Architecture has SSE 4.1 SIMD enabled")
-       message(STATUS "Use SSE 4.1 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -msse4.1" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -msse4.1" )
-           add_definitions(-DUSE_SSE4_1)
-       elseif(C_MSVC)
-           # seems not present on MSVC 2017
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_SSE4_1)
-       endif()
-    else()
-       set(HAS_SSE4_1 OFF CACHE BOOL "Architecture does not have SSE 4.1 SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_SSE4_2 COMPILE_SSE4_2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse42.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_SSE4_2 COMPILE_SSE4_2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_sse42.cxx" COMPILE_DEFINITIONS -msse4.2 -O0)
-    endif()
-    if(COMPILE_SSE4_2 AND RUN_SSE4_2 EQUAL 0)
-       set(HAS_SSE4_2 ON CACHE BOOL "Architecture has SSE 4.2 SIMD enabled")
-       message(STATUS "Use SSE 4.2 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -msse4.2" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -msse4.2" )
-           add_definitions(-DUSE_SSE4_2)
-       elseif(C_MSVC)
-           # seems not present on MSVC 2017
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_SSE4_2)
-       endif()
-    else()
-       set(HAS_SSE4_2 OFF CACHE BOOL "Architecture does not have SSE 4.2 SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_AVX COMPILE_AVX "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_AVX COMPILE_AVX "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx.cxx" COMPILE_DEFINITIONS -mavx -O0)
-    endif()
-    if(COMPILE_AVX AND RUN_AVX EQUAL 0)
-       set(HAS_AVX ON CACHE BOOL "Architecture has AVX SIMD enabled")
-       message(STATUS "Use AVX SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -mavx" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -mavx" )
-           add_definitions(-DUSE_AVX)
-       elseif(C_MSVC)
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /arch:AVX" )
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox /arch:AVX" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_AVX)
-       endif()
-    else()
-       set(HAS_AVX OFF CACHE BOOL "Architecture does not have AVX SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_AVX2 COMPILE_AVX2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx2.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_AVX2 COMPILE_AVX2 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx2.cxx" COMPILE_DEFINITIONS -mavx2 -O0)
-    endif()
-    if(COMPILE_AVX2 AND RUN_AVX2 EQUAL 0)
-       set(HAS_AVX2 ON CACHE BOOL "Architecture has AVX2 SIMD enabled")
-       message(STATUS "Use AVX2 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -mavx2" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -mavx2" )
-           add_definitions(-DUSE_AVX2)
-       elseif(C_MSVC)
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /arch:AVX2" )
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox /arch:AVX2" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_AVX2)
-       endif()
-    else()
-       set(HAS_AVX2 OFF CACHE BOOL "Architecture does not have AVX2 SIMD enabled")
-    endif()
-    if(C_MSVC)
-        try_run(RUN_AVX512 COMPILE_AVX512 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx512.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_AVX512 COMPILE_AVX512 "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_x86_avx512.cxx" COMPILE_DEFINITIONS -mavx512f -O0)
-    endif()
-    if(COMPILE_AVX512 AND RUN_AVX512 EQUAL 0)
-       set(HAS_AVX512 ON CACHE BOOL "Architecture has AVX512 SIMD enabled")
-       message(STATUS "Use AVX512 SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -mavx512f" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -mavx512f" )
-           add_definitions(-DUSE_AVX512)
-       elseif(C_MSVC)
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /arch:AVX512" )
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Oi /GL /Ot /Ox /arch:AVX512" )
-           set( CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG" )
-           add_definitions (/D "_CRT_SECURE_NO_WARNINGS")
-           add_definitions(-DUSE_AVX512)
-       endif()
-    else()
-       set(HAS_AVX512 OFF CACHE BOOL "Architecture does not have AVX512 SIMD enabled")
-    endif()
-elseif(ARCHITECTURE_ARM)
-    if(C_MSVC)
-        try_run(RUN_NEON COMPILE_NEON "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_arm_neon.cxx" COMPILE_DEFINITIONS /O0)
-    else()
-        try_run(RUN_NEON COMPILE_NEON "${CMAKE_BINARY_DIR}/tmp" "${TEST_DIR}/test_arm_neon.cxx" COMPILE_DEFINITIONS -mfpu=neon -O0)
-    endif()
-    if(COMPILE_NEON AND RUN_NEON EQUAL 0)
-       set(HAS_NEON ON CACHE BOOL "Architecture has NEON SIMD enabled")
-       message(STATUS "Use NEON SIMD instructions")
-       if(C_GCC OR C_CLANG)
-           set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -mfpu=neon" )
-           set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -mfpu=neon" )
-           add_definitions(-DUSE_NEON)
-       endif()
-    else()
-       set(HAS_NEON OFF CACHE BOOL "Architecture does not have NEON SIMD enabled")
-    endif()
-elseif(ARCHITECTURE_ARM64)
-    # Advanced SIMD (aka NEON) is mandatory for AArch64
-    set(HAS_NEON ON CACHE BOOL "Architecture has NEON SIMD enabled")
-    message(STATUS "Use NEON SIMD instructions")
-    add_definitions(-DUSE_NEON)
+    force_ext_available(SSSE3)
+  else()
+    set(FORCE_OPT "-mssse3")
+  endif()
 endif()
+
+if (FORCE_SSE41)
+  message(WARNING "FORCE_SSE41 flag is deprecated, please use ARCH_OPT option.")
+  set(ARCH_OPT "")
+  if (C_MSVC)
+    if (ARCHITECTURE_x86)
+      set(ARCH_OPT "SSE2")
+    else()
+      force_ext_available(SSE4_1)
+    endif()
+  else()
+    set(FORCE_OPT "-msse4.1")
+  endif()
+endif()
+
+if (C_MSVC)
+  # Glue to make ARCH_OPT more flexible for MSVC
+  if (ARCH_OPT STREQUAL "native")
+    detect_msvc_native_opt()
+  elseif(ARCH_OPT STREQUAL "SSE4_2")
+    force_ext_available(SSE4_2)
+    set(ARCH_OPT "")
+  elseif(ARCH_OPT STREQUAL "SSE4_1")
+    force_ext_available(SSE4_1)
+    set(ARCH_OPT "")
+  elseif(ARCH_OPT STREQUAL "SSSE3")
+    force_ext_available(SSSE3)
+    set(ARCH_OPT "")
+    elseif(ARCH_OPT STREQUAL "SSE3")
+    force_ext_available(SSE3)
+    set(ARCH_OPT "")
+  elseif(ARCH_OPT STREQUAL "SSE2")
+    force_ext_available(SSE2)
+    set(ARCH_OPT "")
+  endif()
+endif()
+
+message(STATUS "Target architecture: ${ARCHITECTURE}-${ARCH_OPT}")
+
+cmake_push_check_state(RESET)
+if (ARCH_OPT)
+  if(C_MSVC)
+    set(CMAKE_REQUIRED_FLAGS "/arch:${ARCH_OPT}")
+    add_compile_options(${CMAKE_REQUIRED_FLAGS})
+  else()
+    set(CMAKE_REQUIRED_FLAGS "-march=${ARCH_OPT}")
+    add_compile_options(-march=${ARCH_OPT})
+  endif()
+elseif(FORCE_SSSE3 OR FORCE_SSE41)
+  if (NOT C_MSVC)
+    set(CMAKE_REQUIRED_FLAGS ${FORCE_OPT})
+    add_compile_options(${FORCE_OPT})
+  endif()
+endif()
+
+check_cxx_compiler_flag("${CMAKE_REQUIRED_FLAGS}" FLAG_SUPPORTED)
+if (NOT FLAG_SUPPORTED)
+  message(FATAL_ERROR "Flag '${CMAKE_REQUIRED_FLAGS}' rejected by compiler. Please adjust ARCH_OPT option.")
+endif()
+
+if (ARCHITECTURE_ARM)
+  if (C_MSVC)
+    force_ext_available(ARM_NEON)
+  else()
+    list(APPEND CMAKE_REQUIRED_FLAGS -mfpu=neon)
+  endif()
+endif()
+
+# This is quite basic detection, can be extended if needed
+detect_extensions(ARM_NEON)
+detect_extensions(AVX512F)
+detect_extensions(AVX2 HAS_AVX512F)
+detect_extensions(AVX HAS_AVX2)
+detect_extensions(SSE4_2 HAS_AVX)
+detect_extensions(SSE4_1 HAS_SSE4_2)
+detect_extensions(SSSE3 HAS_SSE4_1)
+detect_extensions(SSE3 HAS_SSSE3)
+detect_extensions(SSE2 HAS_SSE3)
+
+cmake_pop_check_state()
+
+set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
+if (C_CLANG OR C_GCC)
+  add_compile_options(-Wall -Wextra -Wvla -Woverloaded-virtual -ffast-math -ftree-vectorize)
+elseif (C_MSVC)
+  add_compile_options(/MP)
+endif()
+
+if (SANITIZE_ADDRESS)
+    message(STATUS "Activate address sanitization")
+    if(MSVC)
+      set(ASAN_LIB_ARCH ${MSVC_CXX_ARCHITECTURE_ID})
+      string(TOLOWER ${ASAN_LIB_ARCH} ASAN_LIB_ARCH)
+      if(ASAN_LIB_ARCH STREQUAL "x86")
+        set(ASAN_LIB_ARCH "i386")
+      elseif(ASAN_LIB_ARCH STREQUAL "x64")
+        set(ASAN_LIB_ARCH "x86_64")
+      endif()
+      add_compile_options(/fsanitize=address)
+      link_libraries(clang_rt.asan_dynamic-${ASAN_LIB_ARCH} clang_rt.asan_dynamic_runtime_thunk-${ASAN_LIB_ARCH})
+      add_link_options(/wholearchive:clang_rt.asan_dynamic_runtime_thunk-${ASAN_LIB_ARCH}.lib)
+    else()
+      add_compile_options(-fsanitize=address -fno-omit-frame-pointer -g)
+      add_link_options(-fsanitize=address)
+    endif()
 endif()
 
 # clear binary test folder
diff --git a/cmake/Modules/FindCompiler.cmake b/cmake/Modules/FindCompiler.cmake
deleted file mode 100644
index 1bd630323..000000000
--- a/cmake/Modules/FindCompiler.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-# Clang or AppleClang (see CMP0025)
-if(NOT DEFINED C_CLANG AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    set(C_CLANG 1)
-elseif(NOT DEFINED C_GCC AND CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-    set(C_GCC 1)
-elseif(NOT DEFINED C_MSVC AND CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-    set(C_MSVC 1)
-endif()
diff --git a/debian/rules b/debian/rules
index 3d4bf9ddb..1a04209de 100755
--- a/debian/rules
+++ b/debian/rules
@@ -2,9 +2,8 @@
 %:
 	dh $@ --parallel --buildsystem=cmake+ninja
 
-# FORCE_SSE41 will be not accepted upstream
 override_dh_auto_configure:
-	dh_auto_configure -- -DFORCE_SSE41=ON -DENABLE_EXTERNAL_LIBRARIES=ON -DDEBUG_OUTPUT=ON -DBUILD_SERVER=OFF
+	dh_auto_configure -- -DARCH_OPT=nehalem -DENABLE_EXTERNAL_LIBRARIES=ON -DDEBUG_OUTPUT=ON -DBUILD_SERVER=OFF
 
 override_dh_auto_test:
 	echo "Skipping test step"
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 045fed630..48f9c4e14 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -68,6 +68,7 @@ elseif (LINUX)
             )
 endif ()
 
+list(APPEND COMMON_CMAKE_ARGS -DCMAKE_POLICY_DEFAULT_CMP0069:STRING=NEW)
 if(CMAKE_MSVC_RUNTIME_LIBRARY)
   list(APPEND COMMON_CMAKE_ARGS -DCMAKE_POLICY_DEFAULT_CMP0091:STRING=NEW)
   list(APPEND COMMON_CMAKE_ARGS -DCMAKE_MSVC_RUNTIME_LIBRARY=${CMAKE_MSVC_RUNTIME_LIBRARY})
@@ -77,6 +78,10 @@ if(CMAKE_BUILD_TYPE)
   list(APPEND COMMON_CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE})
 endif()
 
+if(CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+  list(APPEND COMMON_CMAKE_ARGS -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=${CMAKE_INTERPROCEDURAL_OPTIMIZATION})
+endif()
+
 list(APPEND COMMON_CMAKE_ARGS -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD})
 list(APPEND COMMON_CMAKE_ARGS -DCMAKE_CXX_STANDARD_REQUIRED=${CMAKE_CXX_STANDARD_REQUIRED})
 list(APPEND COMMON_CMAKE_ARGS -DCMAKE_CXX_EXTENSIONS=${CMAKE_CXX_EXTENSIONS})
diff --git a/sdrbase/CMakeLists.txt b/sdrbase/CMakeLists.txt
index 9e3fb0353..93fe2a50a 100644
--- a/sdrbase/CMakeLists.txt
+++ b/sdrbase/CMakeLists.txt
@@ -99,7 +99,6 @@ set(sdrbase_SOURCES
     dsp/channelsamplesource.cpp
     dsp/cwkeyer.cpp
     dsp/cwkeyersettings.cpp
-    dsp/decimatorsif.cpp
     dsp/decimatorsff.cpp
     dsp/decimatorsfi.cpp
     dsp/decimatorc.cpp
diff --git a/sdrbase/dsp/decimatorsif.cpp b/sdrbase/dsp/decimatorsif.cpp
deleted file mode 100644
index 5a443642f..000000000
--- a/sdrbase/dsp/decimatorsif.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-///////////////////////////////////////////////////////////////////////////////////
-// Copyright (C) 2018 Edouard Griffiths, F4EXB                                   //
-//                                                                               //
-// This program is free software; you can redistribute it and/or modify          //
-// it under the terms of the GNU General Public License as published by          //
-// the Free Software Foundation as version 3 of the License, or                  //
-// (at your option) any later version.                                           //
-//                                                                               //
-// This program is distributed in the hope that it will be useful,               //
-// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
-// GNU General Public License V3 for more details.                               //
-//                                                                               //
-// You should have received a copy of the GNU General Public License             //
-// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
-///////////////////////////////////////////////////////////////////////////////////
-
-#include "decimatorsif.h"
-
-const float decimation_scale<8>::scaleIn = 1.0/128.0;
-const float decimation_scale<12>::scaleIn = 1.0/2048.0;
-const float decimation_scale<16>::scaleIn = 1.0/32768.0;
-
diff --git a/sdrbase/dsp/decimatorsif.h b/sdrbase/dsp/decimatorsif.h
index 90a7975bf..24ab35d56 100644
--- a/sdrbase/dsp/decimatorsif.h
+++ b/sdrbase/dsp/decimatorsif.h
@@ -26,31 +26,9 @@
 template<uint InputBits>
 struct decimation_scale
 {
-    static const float scaleIn;
+    static constexpr float scaleIn = 1.0f / (1 << (InputBits - 1));
 };
 
-template<uint InputBits>
-const float decimation_scale<InputBits>::scaleIn = 1.0;
-
-template<>
-struct decimation_scale<8>
-{
-    static const float scaleIn;
-};
-
-template<>
-struct decimation_scale<12>
-{
-    static const float scaleIn;
-};
-
-template<>
-struct decimation_scale<16>
-{
-    static const float scaleIn;
-};
-
-
 template<typename T, uint InputBits, bool IQOrder>
 class DecimatorsIF {
 public:
diff --git a/sdrbench/mainbench.h b/sdrbench/mainbench.h
index c92f603f1..20510a39e 100644
--- a/sdrbench/mainbench.h
+++ b/sdrbench/mainbench.h
@@ -29,6 +29,7 @@
 #include "dsp/decimatorsfi.h"
 #include "dsp/decimatorsff.h"
 #include "parserbench.h"
+#include "export.h"
 
 namespace qtwebapp {
     class LoggerWithFile;
@@ -38,8 +39,8 @@ class MainBench: public QObject {
     Q_OBJECT
 
 public:
-    explicit MainBench(qtwebapp::LoggerWithFile *logger, const ParserBench& parser, QObject *parent = 0);
-    ~MainBench();
+    SDRBASE_API explicit MainBench(qtwebapp::LoggerWithFile *logger, const ParserBench& parser, QObject *parent = 0);
+    SDRBASE_API ~MainBench();
 
 public slots:
     void run();
diff --git a/sdrbench/parserbench.h b/sdrbench/parserbench.h
index 013578382..f9ae7000f 100644
--- a/sdrbench/parserbench.h
+++ b/sdrbench/parserbench.h
@@ -22,6 +22,8 @@
 #include <QCommandLineParser>
 #include <stdint.h>
 
+#include "export.h"
+
 class ParserBench
 {
 public:
@@ -36,10 +38,10 @@ public:
         TestAMBE
     } TestType;
 
-    ParserBench();
-    ~ParserBench();
+    SDRBASE_API ParserBench();
+    SDRBASE_API ~ParserBench();
 
-    void parse(const QCoreApplication& app);
+    SDRBASE_API void parse(const QCoreApplication& app);
 
     const QString& getTestStr() const { return m_testStr; }
     TestType getTestType() const;