continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
ee58a5b30d broke the plv8 build because it
upgraded the v8_6_x expression everywhere to the 6.9 branch, which came
with API changes. Notably, it seems plv8 only supports up-to v8 6.4.x at
this time.
This keeps a copy of the plv8_6_x expression inside the same directory
as the other v8 versions (so patches, etc are easy to apply), but it is
not exposed to the top-level of all-packages.nix.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
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
https://hydra.nixos.org/build/65224506
Besides dontUpdateAutotoolsGnuConfigScripts, the 'arch' assignment was
wrong and resulted in "x64" (stdenv.isArm is not true on AArch64).
