Class S390KernelBuilder

tc_build/kernel.py:365–413

class S390KernelBuilder(KernelBuilder):
    def __init__(self) -> None:
        super().__init__('s390')

        self.cross_compile = 's390x-linux-gnu-'

    def build(self) -> None:
        if self.get_toolchain_version() <= (15, 0, 0):
            # https://git.kernel.org/linus/30d17fac6aaedb40d111bb159f4b35525637ea78
            tc_build.utils.print_warning(
                's390 does not build with LLVM < 15.0.0, skipping build...'
            )
            return

        # LD: https://github.com/ClangBuiltLinux/linux/issues/1524
        # OBJCOPY: https://github.com/ClangBuiltLinux/linux/issues/1530

        # https://github.com/llvm/llvm-project/pull/75643
        lld_res = subprocess.run(
            [Path(self.toolchain_prefix, 'bin/ld.lld'), '-m', 'elf64_s390'],
            capture_output=True,
            check=False,
            text=True,
        )
        if 'error: unknown emulation:' in lld_res.stderr:
            self.make_variables['LD'] = f"{self.cross_compile}ld"

        # https://github.com/llvm/llvm-project/pull/81841
        objcopy_res = subprocess.run(
            [
                Path(self.toolchain_prefix, 'bin/llvm-objcopy'),
                '-I',
                'binary',
                '-O',
                'elf64-s390',
                '-',
                '/dev/null',
            ],
            capture_output=True,
            check=False,
            input='',
            text=True,
        )
        if 'error: invalid output format:' in objcopy_res.stderr:
            self.make_variables['OBJCOPY'] = f"{self.cross_compile}objcopy"

        self.needs_binutils = 'LD' in self.make_variables or 'OBJCOPY' in self.make_variables

        super().build()


class X8664KernelBuilder(KernelBuilder):