文章详细介绍了如何解决在Android平台上由于API级别提高导致的getpwuid_r函数不可用的问题，通过替换为getpwuid函数并进行判断处理，成功解决了编译错误。
error: undefined reference to 'getpwuid_r'
我的解决方法（使用 getpwuid 替换 getpwuid_r ）：
[root@localhost node-v4.2.1]# grep getpwuid_r -R .
[root@localhost node-v4.2.1]# gedit ./deps/uv/src/unix/core.c
将
r = getpwuid_r(uid, &pw, buf, bufsize, &result);
替换为：
//r = getpwuid_r(uid, &pw, buf, bufsize, &result);
result = getpwuid(uid);
if(result == NULL) r = 0;
++++++++++++++++++++++++++++++++++++++++++++
Answer 1：The API level in our build script was recently raised to 21, closing. If you need support for an API level < 21, a patch would be welcome
Answer 2：There is no getpwuid_r implementation in bionic libc in Android platforms below 19. Just remove the call off the code.
我的解决方法（使用 getpwuid 替换 getpwuid_r ）：
[root@localhost node-v4.2.1]# grep getpwuid_r -R .
[root@localhost node-v4.2.1]# gedit ./deps/uv/src/unix/core.c
将
r = getpwuid_r(uid, &pw, buf, bufsize, &result);
替换为：
//r = getpwuid_r(uid, &pw, buf, bufsize, &result);
result = getpwuid(uid);
if(result == NULL) r = 0;
++++++++++++++++++++++++++++++++++++++++++++
Answer 1：The API level in our build script was recently raised to 21, closing. If you need support for an API level < 21, a patch would be welcome
Answer 2：There is no getpwuid_r implementation in bionic libc in Android platforms below 19. Just remove the call off the code.
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