Update CMakeLists.txt

CMakeLists.txt

@@ -17,6 +17,7 @@ option(ZMQ "Include ZMQ support" ON)
 option(PSQL "Include PSQL support" ON)
 option(OPENSSL "Include OPENSSL support" ON)
 option(NMEA2000 "Include NMEA2000 support" ON)
+option(ARMV6 "Compile for Raspberry Pi Zero" OFF)
 
 set(NMEA2000_PATH "." CACHE PATH "Path to NMEA2000 library")
 
@@ -33,6 +34,11 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     add_compile_options("-Wno-psabi")
     add_compile_options("-Wno-sign-compare")
     set(OPTIMIZATION_FLAGS "-Ofast")
+
+    if(ARMV6)
+        message(STATUS "Compiling for ARMv6 (Raspberry Pi Zero)")
+        set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} -march=armv6 -mfpu=vfp -mfloat-abi=hard")
+    endif()
 elseif(MSVC)
     set(OPTIMIZATION_FLAGS "-DWIN32_LEAN_AND_MEAN /EHsc /Oi /Ot /fp:fast")
 endif()