Hi Dmitry,

can you send us your .config so that I can locally reproduce the
issue?

Dmitry Chestnykh wrote,

> - The first observed issue is linking failure:
> `
> /usr/bin/ld: libc/libc_so.a(encodeq.os): in function `__encode_question':
> encodeq.c:(.text+0x16): undefined reference to `__GI___dn_comp'
> /usr/bin/ld: libc/libc_so.a(dnslookup.os): in function `__dns_lookup':
> dnslookup.c:(.text+0x6fb): undefined reference to `__GI___dn_expand'
> /usr/bin/ld: dnslookup.c:(.text+0x7ab): undefined reference to `__hnbad'
> collect2: error: ld returned 1 exit status
> `
> The root cause is that the resolv.c file contains
> some functions (dn_comp, dn_expand, __hnbad)
> under `#ifdef L_ns_name` and `#ifdef L_ns_comp`
> which wasn't defined, so we had undefined refs to such functions.
>
> - The second issue is misleading indentation inside `ns_name_pack`.
> `
> libc/inet/resolv.c: In function '__ns_name_pack':
> libc/inet/resolv.c:3519:17: warning: this 'if' clause does not guard...
>  3519 |                 if (msg != NULL)
> ...
> ./include/errno.h:73:18: note: ...this statement, but the latter
> is misleadingly indented as if it were guarded by the 'if'
>    73 | #   define errno errno             /* For #ifndef errno tests.  */
>       |                  ^~~~~
> libc/inet/resolv.c:3522:25: note: in expansion of macro 'errno'
>  3522 |                         errno = EMSGSIZE;
> `
>
> Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
> ---
>  libc/inet/encodeq.c | 2 ++
>  libc/inet/resolv.c  | 4 ++--
>  2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/libc/inet/encodeq.c b/libc/inet/encodeq.c
> index 5555aa548..dc7945bc6 100644
> --- a/libc/inet/encodeq.c
> +++ b/libc/inet/encodeq.c
> @@ -5,4 +5,6 @@
>   */
> 
>  #define L_encodeq
> +#define L_ns_name
> +#define L_res_comp
>  #include RESOLVER
> diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
> index 2f627ca08..37842021c 100644
> --- a/libc/inet/resolv.c
> +++ b/libc/inet/resolv.c
> @@ -3519,8 +3519,8 @@ cleanup:
>               if (msg != NULL)
>                       *lpp = NULL;
> 
> -                     errno = EMSGSIZE;
> -                     return -1;
> +             errno = EMSGSIZE;
> +             return -1;
>       }
> 
>       return dstp - dst;
> --
> 2.43.0
>
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