Hostname on xtensa esp-idf esp32s3

[lorenzo-pirchio]

Hi,
I need to use hostname_max and the function gethostname for xtensa-esp32s3-espidf but they're not supported for this target.
Can anyone give me any suggestion or help?
Thanks

[tgross35]

PRs are welcome here! Take a look at https://github.com/rust-lang/libc/blob/1ffe0bde929a43ce3d25a8f08b9f95bde8d3e5d8/CONTRIBUTING.md, it should be pretty easy to add the API on those platforms.

[Laura7089]

I'm interested in picking this up. As far as I can tell, libc doesn't currently support that target - support for it in rust was merged as Tier 3 here: rust-lang/rust#126380. Is there a guide/policy for adding target support to the libc crate?

[Vollbrecht]

There is no written guide for this target specifically that i am aware off. Though the target ( and all other -espidf targets ) are using a version of newlib that is directly integrated in the underlying esp-idf system. Depending on the version of the esp chip there are parts of this newlib library directly inside the ROM.

Here you can find the in tree version of newlib that is used in ESP_IDF version 5.2.2.

What actually lives inside the ROM's is tracked inside this repository

We have one outstanding PR that does a bit of cleanup inside libc with respect to correct constants. There you see for example how the rust libc site and the esp_idf site can be checked against each other.

If you have any target specific questions all the maintainers are also available in our esp-rs matrix channel found here