In preparation for the deprecation of `stdenv.isX`.
These shorthands are not conducive to cross-compilation because they
hide the platforms.
Darwin might get cross-compilation for which the continued usage of `stdenv.isDarwin` will get in the way
One example of why this is bad and especially affects compiler packages
https://www.github.com/NixOS/nixpkgs/pull/343059
There are too many files to go through manually but a treewide should
get users thinking when they see a `hostPlatform.isX` in a place where it
doesn't make sense.
```
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv.is" "stdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv'.is" "stdenv'.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "clangStdenv.is" "clangStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "gccStdenv.is" "gccStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenvNoCC.is" "stdenvNoCC.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "inherit (stdenv) is" "inherit (stdenv.hostPlatform) is"
fd --type f "\.nix" | xargs sd --fixed-strings "buildStdenv.is" "buildStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "effectiveStdenv.is" "effectiveStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "originalStdenv.is" "originalStdenv.hostPlatform.is"
```
MuPDF 1.17 was kept for `k2pdfopt` but it is no more needed since 01a2741e7a.
There no good reason to keep this old version with known vulnerabilities.
Allow the macOS GLUT framework to be used automatically in many
cases. Packages that specifically search for freeglut or require its
additional APIs should still explicitly depend on it.
Deliberately skip the Haskell package set, which is mostly
automatically generated, and mupdf, which has its own fork of freeglut.
Recent changes (ea5dd0974d) dropped a
patch Darwin needed. I've added a new unconditional patch, because it
doesn't affect Linux and this way it's more obvious when the patch needs
updating.
I decided to add the `xcbuild` dependency because the upstream
build uses `xcrun` and I don't know of a good reason not to.
This popped up while fixing up the expression for Darwin. Apparently
`which` isn't on the PATH there for Nix builds. May be considered an
impurity on Linux. `command -v` is the POSIX way to do basically the
same thing so I just patched out `which`.
