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I haven't got a full Gemini browser available on the e-paper display, but I have managed to cross compile gmni for my Kobo and use it from a shell script.
These steps are for the Kobo Glo HD, but should be adaptable to other Kobo devices. I found that I needed a GNU system, but you might be able to do it without.
Download the toolchain from Linaro. You probably want gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf.tar.xz. Doing this from a terminal is a bit tricky but you can use lynx.
https://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/arm-linux-gnueabihf/
Extract the archive and add the toolchain's bin directory to your PATH. Check it works with:
$ which arm-linux-gnueabihf-gcc
gmni uses the BearSSL TLS library. Download the BearSSL source and extract it.
https://www.bearssl.org/bearssl-0.6.tar.gz
Download this config file to BearSSL's conf directory.
Compile the BearSSL library:
$ make CONF=kobo-glo-hd
First you need to put the BearSSL header files and libbearssl.a in the toolchain directory:
$ mkdir -p $toolchain/usr/include $ mkdir -p $toolchain/usr/lib $ cp bearssl-0.6/kobo-glo-hd/libbearssl.a $toolchain/usr/lib $ cp bearssl-0.6/inc/* $toolchain/usr/include
Get the gmni source:
$ git https://git.sr.ht/~sircmpwn/gmni
Apply this patch:
Use this shell script to build gmni, setting toolchain_path to the correct value:
Copy the resulting binaries onto the Kobo.
Currently gmni doesn't work with HOME=/ (which it is for the Kobo's root user), so before using it remember to set it to /root or something. I use KOReader which has dropbear built in so I tested over SSH to start with. KOReader also lets you run shell scripts, so I wrote one which downloads posts from my gmisub aggregate:
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Callum Brown, 2021-06-21
Licensed under CC BY-SA 4.0