编译TensorFlow Serving时提示upb.c编译语法错误

问题现象描述

编译TensorFlow Serving时提示upb.c文件编译出错，报错信息为“'__builtin_strncpy' specified bound 127 equals destination size [-Werror=stringop-truncation]”。详细信息如下所示。

WARNING: errors encountered while analyzing target '//tensorflow_serving/model_servers:tensorflow_model_server': it will not be built
In file included from /usr/include/string.h:519,
                 from external/upb/upb/upb.h:16,
                 from external/upb/upb/upb.c:2:
In function 'strncpy',
    inlined from 'upb_status_seterrmsg' at external/upb/upb/upb.c:40:3:
/usr/include/bits/string_fortified.h:95:10: error: '__builtin_strncpy' specified bound 127 equals destination size [-Werror=stringop-truncation]
   95 |   return __builtin___strncpy_chk (__dest, __src, __len,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   96 |       __glibc_objsize (__dest));
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Target //tensorflow_serving/model_servers:tensorflow_model_server failed to build

关键过程、根本原因分析

strncpy函数误用。TensorFlow Serving未及时更新upb版本。

结论、解决方案及效果

1. 在当前目录及所有子目录的文件中搜索“strncpy(status->msg, msg, sizeof(status->msg));”。

   1	grep -nr "strncpy(status->msg, msg, sizeof(status->msg));"

2. 替换为“strncpy(status->msg, msg, sizeof(status->msg)-1);”。

   1	find . -type f -name "*.c" -o -name "*.h" | xargs grep -l 'strncpy(status->msg, msg, sizeof(status->msg));' | xargs sed -i 's/strncpy(status->msg, msg, sizeof(status->msg));/strncpy(status->msg, msg, sizeof(status->msg)-1);/g'

3. 重新执行编译命令。