go编译c报错 cc1.exe: sorry, unimplemented: 64-bit mode not compiled in

go编译c报错 cc1.exe: sorry, unimplemented: 64-bit mode not compiled in
说明当前gcc是32位，无法在当前64位机器上正常工作，需要更新gcc

https://sourceforge.net/projects/mingw-w64/files/mingw-w64/mingw-w64-snapshot/

下载这个压缩包，解压后手动添加环境变量即可