## macOS

```
$ uname -a
Darwin tessier.local 25.5.0 Darwin Kernel Version 25.5.0: Tue Jun  9 22:27:52 PDT 2026; root:xnu-12377.121.10~1/RELEASE_ARM64_T8112 arm64

$ sh
sh-3.2$ cc -o wat wat.c $(ldns-config --cflags --libs) -I$(brew --prefix openssl@3)/include

sh-3.2$ LC_ALL=C ./wat
LC_CTYPE=C            isprint(255)=0
in   example.net. 300 IN TXT "a\255b"
out  22 61 5c 32 35 35 62 22 <- ASCII, ok

sh-3.2$ LC_ALL=en_US.UTF-8 ./wat
LC_CTYPE=en_US.UTF-8  isprint(255)=1
in   example.net. 300 IN TXT "a\255b"
out  22 61 ff 62 22 <- raw 0xff, expected \255
```

## FreeBSD

```
dch@wintermute /tmp> cc -o wat wat.c  -L/usr/local/lib   -lcrypto -lldns -I/usr/local/include

dch@wintermute /tmp> LC_ALL=en_US.UTF-8 ./wat
LC_CTYPE=en_US.UTF-8  isprint(255)=0
in   example.net. 300 IN TXT "a\255b"
out  22 61 5c 32 35 35 62 22 <- ASCII, ok

dch@wintermute /tmp> LC_ALL=C ./wat
LC_CTYPE=C            isprint(255)=0
in   example.net. 300 IN TXT "a\255b"
out  22 61 5c 32 35 35 62 22 <- ASCII, ok
```