linux-kernel-module-cheat/build-crosstool-ng

#!/usr/bin/env python3

import os

import common

class CrosstoolNgComponent(self.Component):
    def do_build(self, args):
        self.assert_crosstool_ng_supports_arch(kwargs['arch'])
        build_dir = self.get_build_dir(args)
        defconfig_dest = os.path.join(kwargs['crosstool_ng_util_dir'], 'defconfig')
        os.makedirs(kwargs['crosstool_ng_util_dir'], exist_ok=True)
        os.makedirs(kwargs['crosstool_ng_download_dir'], exist_ok=True)

        # Bootstrap out-ot-tree WONTFIX. I've tried.
        # https://github.com/crosstool-ng/crosstool-ng/issues/1021
        os.chdir(kwargs['crosstool_ng_src_dir'])
        self.sh.run_cmd(
            [os.path.join(kwargs['crosstool_ng_src_dir'], 'bootstrap'), LF],
        )
        os.chdir(kwargs['crosstool_ng_util_dir'])
        self.sh.run_cmd(
            [
                os.path.join(kwargs['crosstool_ng_src_dir'], 'configure'), LF,
                '--enable-local', LF,
            ],
        )
        self.sh.run_cmd(
            [
                'make', LF,
                '-j', str(kwargs['nproc']), LF,
            ],
        )

        # Build the toolchain.
        self.sh.cp(
            os.path.join(kwargs['root_dir'], 'crosstool_ng_config', kwargs['arch']),
            defconfig_dest
        )
        self.write_configs(
            kwargs['crosstool_ng_defconfig'],
            [
                'CT_PREFIX_DIR="{}"'.format(kwargs['crosstool_ng_install_dir']),
                'CT_WORK_DIR="{}"'.format(build_dir),
                'CT_LOCAL_TARBALLS_DIR="{}"'.format(kwargs['crosstool_ng_download_dir']),
            ]
        )
        self.sh.run_cmd(
            [
                kwargs['crosstool_ng_executable'], LF,
                'defconfig', LF,
            ],
        )
        os.unlink(defconfig_dest)
        self.sh.run_cmd(
            [
                kwargs['crosstool_ng_executable'], LF,
                'build', LF,
                'CT_JOBS={}'.format(str(kwargs['nproc'])), LF,
            ],
            out_file=os.path.join(build_dir, 'lkmc.log'),
            delete_env=['LD_LIBRARY_PATH'],
            extra_paths=[kwargs['ccache_dir']],
        )

    def get_argparse_args(self):
        return {
            'description': '''\
Build crosstool-NG with Newlib for bare metal compilation'
'''
        }

    def get_build_dir(self, args):
        return kwargs['crosstool_ng_build_dir']

if __name__ == '__main__':
    CrosstoolNgComponent().build()