New comment by leleliu008 on void-packages repository

https://github.com/void-linux/void-packages/pull/28544#issuecomment-782314449

Comment:
you shoud install [GNU libiconv](https://www.gnu.org/software/libiconv/) rather than using the `musl iconv`, the reason is [here](https://wiki.musl-libc.org/functional-differences-from-glibc.html)

It seems that we can not install `GNU libiconv` via `xbps`, we can install from source, reference instructions as following:
```
curl -LO https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz
tar vxf libiconv-1.16.tar.gz
cd libiconv-1.16
./configure --enable-extra-encodings
make
make install
```