not available on armv7l/armhf

[zapashcanon]

Hi,

I wanted to run an executable (a website made with drame) built on top of httpcats on a machine running an armv7l kernel but I got the error:

$ opam install . --deps-only
[...]
[ERROR] Package conflict!
  * Missing dependency:
    - deps-of-drame -> httpcats
    unmet availability conditions: 'arch != "x86_32" & arch != "arm32"'

I'm making this in issue in order to track why the library is not available on arm32.

Two things:

• first, it seems the constraint has been added in 23450bb. I have been told it may was because of mirage-crypto, tls or x509;
• then, I also found Tests don't work on x86_32 #9 which shows that the code may also not be working on 32bits anyway.

I tried to build it by hand to see what happen:

$ git clone https://github.com/robur-coop/httpcats.git
$ cd httpcats
$ opam install . --deps-only
[ERROR] Package conflict!
  * Missing dependency:
    - deps-of-httpcats -> tls-miou-unix >= 1.0.1 -> tls (= 1.0.0 | = 1.0.2 | >= 1.0.4)
    unmet availability conditions, e.g. 'arch != "arm32"'

Then:

$ git clone https://github.com/mirleft/ocaml-tls.git
$ cd ocaml-tls
$ opam install ./tls.opam --deps-only
...
Processing 74/77: [mirage-crypto-ec: dune build][1]    23987 killed     opam install ./tls.opam --deps-only

I'm currently investigating to provide more information.

So, compiling mirage-crypto-ec was reproductibly being OOM-killed (after a really long time!). But for some reason, build with dune install -p mirage-crypto-ec -j1 was successful (and fast).

I'm back at trying to install tls.

So, I managed to install all the dependencies by hand. I had to pass -j1 to dune directly otherwise the build was being killed because of OOM.

The website seems to be working just fine. So I guess the constraint has no reason to be there and can be removed? I tried to run the tests and they are also passing.