remove the `isRedox` condition which was added because `stdenv.isLinux` uses `hostPlatform`, after specifying `targetPlatform` it's no longer necessary.
The stage0 ghc is build->build since it builds the stage1 compiler which
has build for its host platform (i.e. is build->target relative to the
entire GHC derivation).
Also annotate a bit more around the use of pkgsBuildBuild and the boot
compiler and make it more explicit where it comes from in the
derivation.
This is a safeguard against a problem we had with 9.6. Unfortunately,
since the cc wrapper emits `-L` and `-rpath` flags based on platform
config (e.g. aarch64-unknown-linux), not platform role (e.g. build),
stdenv itself doesn't prevent ghc from being linked against the boot
compiler when building a native or cross-compiling GHC (since host ==
build).
With disallowedReferences, the build will fail if such a problem is
re-introduced.
We reuse the targetLibs logic for this since it is more or less the same
story. However, the terminfo library is only built when GHC is neither a
cross-compiler nor being cross-compiled. Therefore ncurses (if used)
will only ever come from pkgsHostTarget. In the other cases ncurses is
still passed via depsBuildBuild for the stage1 compiler.
This commit tries to resolve the problem that the package-db doesn't
include library and include dirs of ncurses for the terminfo package,
causing library loading and linking problems in downstream packages,
e.g. dhall-docs and dhall-toml. This problem was introduced in
4b00fbf163. With this in mind, not passing
--with-curses-* – as long as the terminfo package isn't built – seems
fine.
linkNugetPackages and linkNuGetPackagesAndSources can now be disabled by
setting them to false.
linkNugetPackages will use _linkPackages, which is much faster.
Instead of creating a nuget.config in NIX_BUILD_TOP, and depending on
inheritance from sourceRoot, we'll make the required changes directly in
the latter. This fixes packages where sourceRoot is NIX_BUILD_TOP.
The dotnet sdk used usually needs to match the one required by the
project (global.json). Having the dependcy in nix just meant it always
had to be overridden.
