用strncpy字符串拷贝时，出现警告：warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]。

2、解决：strncpy不拷贝最后一个字节，手动给它赋值'\0'。

#define SIZE = 20; char *a_str = "12345678"; char mybuff[SIZE]; strncpy(mybuff, a_str, SIZE-1); mybuff[size-1] = '\0';

就不会报错了。

/home/tsrj/tsjdk8-project/tsjdk8-252/hotspot/src/share/vm/run ti me/arguments.cpp: In sta ti c member f unc ti on ‘sta ti c void Arguments::fix_appclasspath()’: /home/tsrj/tsjdk8-project/tsjdk8-252/hotspot/src/share/vm/run ti me/arguments.cpp:3459:12: err In f unc ti on ‘ strncpy ’, inlined from ‘splitName’ at ../../src/pyi_la unc h.c:83:5, inlined from ‘_ex tr act_dependency’ at ../../src/pyi_la unc h.c:215:9: /usr/include/aarch64-linux-gnu 复制字符串中的字符 将source字符串中的前num个字符复制到 des ti nat ion 中。若还没复制完num个字符就发现了source C字符串中包含的结尾符（也就是null字符），则 des ti nat ion 会在此处填充0值，之后继续复制还没复制完的字符，直到复制完num个字符为止。 若source字符串不止num个字符，且nul C op ies the first num characters of source to des ti nat ion . If the end of the source C string (which is signaled by a nu...