Date: Fri, 23 Oct 2020 13:08:25 -0400 From: Rich Felker <dalias@...c.org> To: 纳兰融雪 <lidehu@...inggirl.net> Cc: musl <musl@...ts.openwall.com> Subject: Re: About the glibc libresolv vs musl network resolver routines signature On Fri, Oct 23, 2020 at 05:25:44PM +0800, 纳兰融雪 wrote: > I work with any third party code written with glic, and I need > compile and run it in a musl runtime.The code use `res_ninit`, but I > cloud not find it in musl's resolv.h file.I noticed that glibc use > `res_ninit`, `res_nclose`, `res_nquery`, etc, and marked `res_init`, > `res_query`, etc as deprecated, but musl still using the old > signature.I'm wondering:- How do I compile the code that use the > `res_ninit` routine signature?- Is there a standard for the sinature > for `resolv.h` (/usr/include/resolv.h)?- Will musl will use the new > `res_ninit` glibc current using or the `res_init` style still? resolv.h defines the __RES version macro to indicate the API level provided, and its meaning is consistent across different libcs. __RES >= 19991006 indicates support for the res_n* functions. musl's resolver is stateless and does not have them, and defines __RES appropriately to indicate that it doesn't. Rich
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