Compilation fix

radio/src/CMakeLists.txt

@@ -979,14 +979,15 @@ if(ARCH STREQUAL ARM)
   set(CMAKE_ASM_COMPILE_OBJECT "<CMAKE_ASM_COMPILER> -o <OBJECT> <SOURCE>")
 
   set(COMMON_FLAGS "-mcpu=${MCU} -mthumb -fomit-frame-pointer -fverbose-asm -Wa,-ahlms=firmware.lst -O${OPT} -gdwarf-2 -DHSE_VALUE=${HSE_VALUE} -fno-exceptions -fdata-sections -ffunction-sections ${WARNING_FLAGS}")
+  set(COMMON_CPP_FLAGS "${COMMON_FLAGS} -std=gnu++11")
   set(CMAKE_C_FLAGS "${COMMON_FLAGS} -Wimplicit")
   set(CMAKE_C_FLAGS_RELWITHDEBINFO "${COMMON_FLAGS} -Wimplicit -g")
   set(CMAKE_C_FLAGS_RELEASE "${COMMON_FLAGS} -Wimplicit")
   set(CMAKE_C_FLAGS_DEBUG  "${COMMON_FLAGS} -Wimplicit -g")
-  set(CMAKE_CXX_FLAGS "${COMMON_FLAGS}")
-  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${COMMON_FLAGS} -g")
-  set(CMAKE_CXX_FLAGS_RELEASE "${COMMON_FLAGS}")
-  set(CMAKE_CXX_FLAGS_DEBUG  "${COMMON_FLAGS} -g")
+  set(CMAKE_CXX_FLAGS "${COMMON_CPP_FLAGS}")
+  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${COMMON_CPP_FLAGS} -g")
+  set(CMAKE_CXX_FLAGS_RELEASE "${COMMON_CPP_FLAGS}")
+  set(CMAKE_CXX_FLAGS_DEBUG  "${COMMON_CPP_FLAGS} -g")
   set(CMAKE_EXE_LINKER_FLAGS "-mcpu=${MCU} -mthumb -lm -T${RADIO_SRC_DIRECTORY}/${LINKER_SCRIPT} -Wl,-Map=firmware.map,--cref,--no-warn-mismatch,--gc-sections")
 
   if(PCB STREQUAL TARANIS)

radio/src/audio_arm.cpp

@@ -20,7 +20,8 @@
 
 #include "opentx.h"
 #include <math.h>
-
+#include <strings.h>
+ 
 extern OS_MutexID audioMutex;
 
 const int16_t sineValues[] =