K4 Compile Zig programs for Kindle?

RedOnion · 03-11-2025, 09:11 AM

I hacked my old kindle (10th gen) and jailbreaked (jailbroken?) it. I cross compiled the hello world program using:

Code:

zig build-exe .\tiny-hello.zig -O ReleaseSmall -fstrip -fsingle-threaded -target arm-linux-gnueabi

It worked as expected. I used this guide here

With this success I went on to compile the following HTTP client:

https://zig.news/andrewgossage/easy-...lientfetch-k43

It however failed with the following error:

Code:

[root@kindle apps]# ./hello-web

URL: https://jsonplaceholder.typicode.com/posts/1 GET
Sending request...
error: CertificateBundleLoadFailure

curl works for the same URL, which rules out the device and network.

Code:

[root@kindle us]# curl -s https://jsonplaceholder.typicode.com/posts/1
{
  "userId": 1,
  "id": 1,
  "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit",
  "body": "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto"
}

Zig people told me to check if I can use strace to debug. Is there a way this could work?

Marek · 03-12-2025, 05:51 AM

I assume the problem is in https://ziglang.org/documentation/0....undle.zig.html (function rescanLinux), the kindle doesn't store the ssl certs in any of the paths mentioned, so zig isnt able to find them, they are stored in /etc/ssl/certs/, so you would need to modify the mentioned functions or copy/link the cert files to one of the expected paths

03-11-2025, 09:11 AM	#1
RedOnion Junior Member Posts: 9 Karma: 10 Join Date: Mar 2025 Device: Kindle PW	Compile Zig programs for Kindle? I hacked my old kindle (10th gen) and jailbreaked (jailbroken?) it. I cross compiled the hello world program using: Code: zig build-exe .\tiny-hello.zig -O ReleaseSmall -fstrip -fsingle-threaded -target arm-linux-gnueabi It worked as expected. I used this guide here With this success I went on to compile the following HTTP client: https://zig.news/andrewgossage/easy-...lientfetch-k43 It however failed with the following error: Code: [root@kindle apps]# ./hello-web URL: https://jsonplaceholder.typicode.com/posts/1 GET Sending request... error: CertificateBundleLoadFailure curl works for the same URL, which rules out the device and network. Code: [root@kindle us]# curl -s https://jsonplaceholder.typicode.com/posts/1 { "userId": 1, "id": 1, "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit", "body": "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto" } Zig people told me to check if I can use strace to debug. Is there a way this could work?

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03-12-2025, 05:51 AM	#2
Marek Groupie Posts: 195 Karma: 1512344 Join Date: Jul 2023 Device: PW3, PW4 :(, KT5, PW5, KLC	I assume the problem is in https://ziglang.org/documentation/0....undle.zig.html (function rescanLinux), the kindle doesn't store the ssl certs in any of the paths mentioned, so zig isnt able to find them, they are stored in /etc/ssl/certs/, so you would need to modify the mentioned functions or copy/link the cert files to one of the expected paths

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