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在ubuntu20上编译dpdk 18.11报错，gcc 版本为9.3.0，报错如下：

error: converting a packed ‘const struct ether_addr’ pointer (alignment 1) to a ‘unaligned_uint16_t’ {aka ‘const short unsigned int’} pointer (alignment 2) may result in an unaligned pointer value [-Werror=address-of-packed-member]
  149 |  const unaligned_uint16_t *ea_words = (const unaligned_uint16_t *)ea;

这是因为编译器检测到dpdk代码这样可能导致地址的非对齐，我们取消掉这个检查就行

解决方案

编译时添加EXTRA_CFLAGS=’-w -Wno-address-of-packed-member’ 参数

make install T=x86_64-native-linuxapp-gcc  -j6  EXTRA_CFLAGS='-w -Wno-address-of-packed-member'