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Diffstat (limited to '')
| -rwxr-xr-x | mesonbuild/scripts/env2mfile.py | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/mesonbuild/scripts/env2mfile.py b/mesonbuild/scripts/env2mfile.py new file mode 100755 index 0000000..af7ffc6 --- /dev/null +++ b/mesonbuild/scripts/env2mfile.py @@ -0,0 +1,368 @@ +# Copyright 2022 The Meson development team + +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at + +# http://www.apache.org/licenses/LICENSE-2.0 + +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +from __future__ import annotations + +import sys, os, subprocess, shutil +import shlex +import typing as T + +from .. import envconfig +from .. import mlog +from ..compilers import compilers +from ..compilers.detect import defaults as compiler_names + +if T.TYPE_CHECKING: + import argparse + +def has_for_build() -> bool: + for cenv in envconfig.ENV_VAR_COMPILER_MAP.values(): + if os.environ.get(cenv + '_FOR_BUILD'): + return True + return False + +def add_arguments(parser: 'argparse.ArgumentParser') -> None: + parser.add_argument('--debarch', default=None, + help='The dpkg architecture to generate.') + parser.add_argument('--gccsuffix', default="", + help='A particular gcc version suffix if necessary.') + parser.add_argument('-o', required=True, dest='outfile', + help='The output file.') + parser.add_argument('--cross', default=False, action='store_true', + help='Generate a cross compilation file.') + parser.add_argument('--native', default=False, action='store_true', + help='Generate a native compilation file.') + parser.add_argument('--system', default=None, + help='Define system for cross compilation.') + parser.add_argument('--cpu', default=None, + help='Define cpu for cross compilation.') + parser.add_argument('--cpu-family', default=None, + help='Define cpu family for cross compilation.') + parser.add_argument('--endian', default='little', choices=['big', 'little'], + help='Define endianness for cross compilation.') + +class MachineInfo: + def __init__(self) -> None: + self.compilers: T.Dict[str, T.List[str]] = {} + self.binaries: T.Dict[str, T.List[str]] = {} + self.properties: T.Dict[str, T.Union[str, T.List[str]]] = {} + self.compile_args: T.Dict[str, T.List[str]] = {} + self.link_args: T.Dict[str, T.List[str]] = {} + self.cmake: T.Dict[str, T.Union[str, T.List[str]]] = {} + + self.system: T.Optional[str] = None + self.cpu: T.Optional[str] = None + self.cpu_family: T.Optional[str] = None + self.endian: T.Optional[str] = None + +#parser = argparse.ArgumentParser(description='''Generate cross compilation definition file for the Meson build system. +# +#If you do not specify the --arch argument, Meson assumes that running +#plain 'dpkg-architecture' will return correct information for the +#host system. +# +#This script must be run in an environment where CPPFLAGS et al are set to the +#same values used in the actual compilation. +#''' +#) + +def locate_path(program: str) -> T.List[str]: + if os.path.isabs(program): + return [program] + for d in os.get_exec_path(): + f = os.path.join(d, program) + if os.access(f, os.X_OK): + return [f] + raise ValueError("%s not found on $PATH" % program) + +def write_args_line(ofile: T.TextIO, name: str, args: T.Union[str, T.List[str]]) -> None: + if len(args) == 0: + return + if isinstance(args, str): + ostr = name + "= '" + args + "'\n" + else: + ostr = name + ' = [' + ostr += ', '.join("'" + i + "'" for i in args) + ostr += ']\n' + ofile.write(ostr) + +def get_args_from_envvars(infos: MachineInfo) -> None: + cppflags = shlex.split(os.environ.get('CPPFLAGS', '')) + cflags = shlex.split(os.environ.get('CFLAGS', '')) + cxxflags = shlex.split(os.environ.get('CXXFLAGS', '')) + objcflags = shlex.split(os.environ.get('OBJCFLAGS', '')) + objcxxflags = shlex.split(os.environ.get('OBJCXXFLAGS', '')) + ldflags = shlex.split(os.environ.get('LDFLAGS', '')) + + c_args = cppflags + cflags + cpp_args = cppflags + cxxflags + c_link_args = cflags + ldflags + cpp_link_args = cxxflags + ldflags + + objc_args = cppflags + objcflags + objcpp_args = cppflags + objcxxflags + objc_link_args = objcflags + ldflags + objcpp_link_args = objcxxflags + ldflags + + if c_args: + infos.compile_args['c'] = c_args + if c_link_args: + infos.link_args['c'] = c_link_args + if cpp_args: + infos.compile_args['cpp'] = cpp_args + if cpp_link_args: + infos.link_args['cpp'] = cpp_link_args + if objc_args: + infos.compile_args['objc'] = objc_args + if objc_link_args: + infos.link_args['objc'] = objc_link_args + if objcpp_args: + infos.compile_args['objcpp'] = objcpp_args + if objcpp_link_args: + infos.link_args['objcpp'] = objcpp_link_args + +cpu_family_map = { + 'mips64el': 'mips64', + 'i686': 'x86', +} +cpu_map = { + 'armhf': 'arm7hlf', + 'mips64el': 'mips64' +} + +def deb_detect_cmake(infos: MachineInfo, data: T.Dict[str, str]) -> None: + system_name_map = {'linux': 'Linux', 'kfreebsd': 'kFreeBSD', 'hurd': 'GNU'} + system_processor_map = {'arm': 'armv7l', 'mips64el': 'mips64', 'powerpc64le': 'ppc64le'} + + infos.cmake["CMAKE_C_COMPILER"] = infos.compilers['c'] + infos.cmake["CMAKE_CXX_COMPILER"] = infos.compilers['cpp'] + infos.cmake["CMAKE_SYSTEM_NAME"] = system_name_map[data['DEB_HOST_ARCH_OS']] + infos.cmake["CMAKE_SYSTEM_PROCESSOR"] = system_processor_map.get(data['DEB_HOST_GNU_CPU'], + data['DEB_HOST_GNU_CPU']) + +def deb_compiler_lookup(infos: MachineInfo, compilerstems: T.List[T.Tuple[str, str]], host_arch: str, gccsuffix: str) -> None: + for langname, stem in compilerstems: + compilername = f'{host_arch}-{stem}{gccsuffix}' + try: + p = locate_path(compilername) + infos.compilers[langname] = p + except ValueError: + pass + +def detect_cross_debianlike(options: T.Any) -> MachineInfo: + if options.debarch is None: + cmd = ['dpkg-architecture'] + else: + cmd = ['dpkg-architecture', '-a' + options.debarch] + output = subprocess.check_output(cmd, universal_newlines=True, + stderr=subprocess.DEVNULL) + data = {} + for line in output.split('\n'): + line = line.strip() + if line == '': + continue + k, v = line.split('=', 1) + data[k] = v + host_arch = data['DEB_HOST_GNU_TYPE'] + host_os = data['DEB_HOST_ARCH_OS'] + host_cpu_family = cpu_family_map.get(data['DEB_HOST_GNU_CPU'], + data['DEB_HOST_GNU_CPU']) + host_cpu = cpu_map.get(data['DEB_HOST_ARCH'], + data['DEB_HOST_ARCH']) + host_endian = data['DEB_HOST_ARCH_ENDIAN'] + + compilerstems = [('c', 'gcc'), + ('cpp', 'g++'), + ('objc', 'gobjc'), + ('objcpp', 'gobjc++')] + infos = MachineInfo() + deb_compiler_lookup(infos, compilerstems, host_arch, options.gccsuffix) + if len(infos.compilers) == 0: + print('Warning: no compilers were detected.') + infos.binaries['ar'] = locate_path("%s-ar" % host_arch) + infos.binaries['strip'] = locate_path("%s-strip" % host_arch) + infos.binaries['objcopy'] = locate_path("%s-objcopy" % host_arch) + infos.binaries['ld'] = locate_path("%s-ld" % host_arch) + try: + infos.binaries['cmake'] = locate_path("cmake") + deb_detect_cmake(infos, data) + except ValueError: + pass + try: + infos.binaries['pkgconfig'] = locate_path("%s-pkg-config" % host_arch) + except ValueError: + pass # pkg-config is optional + try: + infos.binaries['cups-config'] = locate_path("cups-config") + except ValueError: + pass + infos.system = host_os + infos.cpu_family = host_cpu_family + infos.cpu = host_cpu + infos.endian = host_endian + + get_args_from_envvars(infos) + return infos + +def write_machine_file(infos: MachineInfo, ofilename: str, write_system_info: bool) -> None: + tmpfilename = ofilename + '~' + with open(tmpfilename, 'w', encoding='utf-8') as ofile: + ofile.write('[binaries]\n') + ofile.write('# Compilers\n') + for langname in sorted(infos.compilers.keys()): + compiler = infos.compilers[langname] + write_args_line(ofile, langname, compiler) + ofile.write('\n') + + ofile.write('# Other binaries\n') + for exename in sorted(infos.binaries.keys()): + exe = infos.binaries[exename] + write_args_line(ofile, exename, exe) + ofile.write('\n') + + ofile.write('[properties]\n') + all_langs = list(set(infos.compile_args.keys()).union(set(infos.link_args.keys()))) + all_langs.sort() + for lang in all_langs: + if lang in infos.compile_args: + write_args_line(ofile, lang + '_args', infos.compile_args[lang]) + if lang in infos.link_args: + write_args_line(ofile, lang + '_link_args', infos.link_args[lang]) + for k, v in infos.properties.items(): + write_args_line(ofile, k, v) + ofile.write('\n') + + if infos.cmake: + ofile.write('[cmake]\n\n') + for k, v in infos.cmake.items(): + write_args_line(ofile, k, v) + ofile.write('\n') + + if write_system_info: + ofile.write('[host_machine]\n') + ofile.write(f"cpu = '{infos.cpu}'\n") + ofile.write(f"cpu_family = '{infos.cpu_family}'\n") + ofile.write(f"endian = '{infos.endian}'\n") + ofile.write(f"system = '{infos.system}'\n") + os.replace(tmpfilename, ofilename) + +def detect_language_args_from_envvars(langname: str, envvar_suffix: str = '') -> T.Tuple[T.List[str], T.List[str]]: + ldflags = tuple(shlex.split(os.environ.get('LDFLAGS' + envvar_suffix, ''))) + compile_args = shlex.split(os.environ.get(compilers.CFLAGS_MAPPING[langname] + envvar_suffix, '')) + if langname in compilers.LANGUAGES_USING_CPPFLAGS: + cppflags = tuple(shlex.split(os.environ.get('CPPFLAGS' + envvar_suffix, ''))) + lang_compile_args = list(cppflags) + compile_args + else: + lang_compile_args = compile_args + lang_link_args = list(ldflags) + compile_args + return (lang_compile_args, lang_link_args) + +def detect_compilers_from_envvars(envvar_suffix: str = '') -> MachineInfo: + infos = MachineInfo() + for langname, envvarname in envconfig.ENV_VAR_COMPILER_MAP.items(): + compilerstr = os.environ.get(envvarname + envvar_suffix) + if not compilerstr: + continue + compiler = shlex.split(compilerstr) + infos.compilers[langname] = compiler + lang_compile_args, lang_link_args = detect_language_args_from_envvars(langname, envvar_suffix) + if lang_compile_args: + infos.compile_args[langname] = lang_compile_args + if lang_link_args: + infos.link_args[langname] = lang_link_args + return infos + +def detect_binaries_from_envvars(infos: MachineInfo, envvar_suffix: str = '') -> None: + for binname, envvar_base in envconfig.ENV_VAR_TOOL_MAP.items(): + envvar = envvar_base + envvar_suffix + binstr = os.environ.get(envvar) + if binstr: + infos.binaries[binname] = shlex.split(binstr) + +def detect_cross_system(infos: MachineInfo, options: T.Any) -> None: + for optname in ('system', 'cpu', 'cpu_family', 'endian'): + v = getattr(options, optname) + if not v: + mlog.error(f'Cross property "{optname}" missing, set it with --{optname.replace("_", "-")}.') + sys.exit(1) + setattr(infos, optname, v) + +def detect_cross_env(options: T.Any) -> MachineInfo: + if options.debarch: + print('Detecting cross environment via dpkg-reconfigure.') + infos = detect_cross_debianlike(options) + else: + print('Detecting cross environment via environment variables.') + infos = detect_compilers_from_envvars() + detect_cross_system(infos, options) + return infos + +def add_compiler_if_missing(infos: MachineInfo, langname: str, exe_names: T.List[str]) -> None: + if langname in infos.compilers: + return + for exe_name in exe_names: + lookup = shutil.which(exe_name) + if not lookup: + continue + compflags, linkflags = detect_language_args_from_envvars(langname) + infos.compilers[langname] = [lookup] + if compflags: + infos.compile_args[langname] = compflags + if linkflags: + infos.link_args[langname] = linkflags + return + +def detect_missing_native_compilers(infos: MachineInfo) -> None: + # T.Any per-platform special detection should go here. + for langname, exes in compiler_names.items(): + if langname not in envconfig.ENV_VAR_COMPILER_MAP: + continue + add_compiler_if_missing(infos, langname, exes) + +def detect_missing_native_binaries(infos: MachineInfo) -> None: + # T.Any per-platform special detection should go here. + for toolname in sorted(envconfig.ENV_VAR_TOOL_MAP.keys()): + if toolname in infos.binaries: + continue + exe = shutil.which(toolname) + if exe: + infos.binaries[toolname] = [exe] + +def detect_native_env(options: T.Any) -> MachineInfo: + use_for_build = has_for_build() + if use_for_build: + mlog.log('Using FOR_BUILD envvars for detection') + esuffix = '_FOR_BUILD' + else: + mlog.log('Using regular envvars for detection.') + esuffix = '' + infos = detect_compilers_from_envvars(esuffix) + detect_missing_native_compilers(infos) + detect_binaries_from_envvars(infos, esuffix) + detect_missing_native_binaries(infos) + return infos + +def run(options: T.Any) -> None: + if options.cross and options.native: + sys.exit('You can only specify either --cross or --native, not both.') + if not options.cross and not options.native: + sys.exit('You must specify --cross or --native.') + mlog.notice('This functionality is experimental and subject to change.') + detect_cross = options.cross + if detect_cross: + infos = detect_cross_env(options) + write_system_info = True + else: + infos = detect_native_env(options) + write_system_info = False + write_machine_file(infos, options.outfile, write_system_info) |