为开发板Arduino/Genuino Mega orMega 2560编译时出错

为开发板Arduino/Genuino Mega orMega 2560编译时出错
求解决
Arduino:1.8.8 (Windows 10), 开发板："Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::_BEEP()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

d:/arduino/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: Disabling relaxation: it will not work with multiple definitions

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::_BEEP()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::~_BEEP()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::~_BEEP()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::TurnOn()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::TurnOff()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `_BEEP::Initialization()'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\BEEP\BEEP.cpp.o (symbol from plugin): In function `_BEEP::_BEEP()':

(.text+0x0): multiple definition of `BEEP'

sketch\BEEP.cpp.o (symbol from plugin):(.text+0x0): first defined here

collect2.exe: error: ld returned 1 exit status

exit status 1
为开发板 Arduino/Genuino Mega or Mega 2560 编译时出错。

在文件 -> 首选项开启
“编译过程中显示详细输出”选项
这份报告会包含更多信息。

从错误信息看是出现了多重定义，方便的话建议楼主上传下代码

参考这个帖子
http://forum.arduino.cc/index.php?topic=568353.msg3871696

TurnOn(),_BEEP()这些函数你没写吧，直接引用提示函数未定义。如果是直接引用已有库函数，defined引用部分没搞好。