dhall-json 1.2.0 requires dhall's version to be at least 1.14.0 and less
than 1.15.0. The package wasn't building for me because `dhall` is at
version 1.11.1; pinning to `dhall_1_14_0` fixed it.
A jailbreak-cabal binary compiles against Cabal 2.2.x will break fgl's Cabal
file. Therefore, we just disable the test suite that causes these version
issues.
Some of the new tests need the `nix` executable on `PATH`.
One also needs `hpack`, but we really don’t want to embiggen (heh) the closure
because of that.
The `haskell-gi` build fails its doctests because of a missing
library; I'm not 100% convinced that setting it to `dontCheck` is the
right thing to do, but I don't have a better idea at the moment.
The `gi-gdkx11` build fails because, surprise, Gdk-X11 isn't found; by
looking around in my store, I found that that that library seems to
live in gtk3 these days; this override is just a stop-gap, though,
I've also submitted the change to cabal2nix that I believe will fix
the automatic generation of the package in the future.
Following legacy packing conventions, `isArm` was defined just for
32-bit ARM instruction set. This is confusing to non packagers though,
because Aarch64 is an ARM instruction set.
The official ARM overview for ARMv8[1] is surprisingly not confusing,
given the overall state of affairs for ARM naming conventions, and
offers us a solution. It divides the nomenclature into three levels:
```
ISA: ARMv8 {-A, -R, -M}
/ \
Mode: Aarch32 Aarch64
| / \
Encoding: A64 A32 T32
```
At the top is the overall v8 instruction set archicture. Second are the
two modes, defined by bitwidth but differing in other semantics too, and
buttom are the encodings, (hopefully?) isomorphic if they encode the
same mode.
The 32 bit encodings are mostly backwards compatible with previous
non-Thumb and Thumb encodings, and if so we can pun the mode names to
instead mean "sets of compatable or isomorphic encodings", and then
voilà we have nice names for 32-bit and 64-bit arm instruction sets
which do not use the word ARM so as to not confused either laymen or
experienced ARM packages.
[1]: https://developer.arm.com/products/architecture/a-profile
