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.
