We should be using the _same_ buildPackages when we generate the
configuration (which happens in buildLinux) as when we actually build
the kernel (which happens in linuxManualConfig).
This change enforces that when we callPackage `manual-config.nix` we
pass on whatever `buildPackages` that `buildLinux` itself was called
with.
This is just for practicity, as it allows users of buildLinux to pass
along extra flags they need in the kernel's make invocation. This makes,
for example, supporting LLVM _much_ easier, and could enable us in the
future to provide clang-built kernels.
This enforces that the configuration generated will obey any/all flags
set in the platform/stdenv configuration. This is crucial, for example,
if you'd like to build a kernel using clang.
Without this patch, anything you set in
`stdenv.hostPlatform.linux-kernel.makeFlags` is wholly ignored during
config generation, causing (for example) any changes in the desired
toolchain (e.g. `LLVM`, `LLVM_IAS`) to not be reflected in the generated
config, and for the subsequent build to fail.
There are many scripts in `scripts/` which may be called by the build,
depending on how the user chooses to configure the kernel. For example,
`scripts/jobserver-exec` is called whenever the kernel is being built
with LLVM tooling, and without this patch that build will fail due to
the broken shebang.
This patch makes us fix _all_ scripts, as well as add a dependency on
python3Minimal, since a lot of the aforementioned scripts are written in
Python3 instead of shell.
In order to have our linux builds be reproducible we patch the
`Makefile` to use `--build-id=none` as opposed to the default
`--build-id=sha1`. The way we've been doing this, however, caused the
flag to be mangled, and being set to `--build-id=none=sha1`. While bfd
seems to parse this normally, lld will loudly complain that the flag
does not exist:
```
linux> LD .tmp_vmlinux.kallsyms1
linux> ld.lld: error: unknown --build-id style: none=sha1
```
With this change the flag is now correctly set to `--build-id=none`.
Changes the package to apply a patchset to the appropriate minor kernel
instead of using its initial release, which means it will benefit from
revision updates.
