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# Copyright 2019 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.
"""Provides mixins for GNU compilers and GNU-like compilers."""
import abc
import functools
import os
import pathlib
import re
import subprocess
import typing
from ... import mesonlib
from ... import mlog
if typing.TYPE_CHECKING:
from ...coredata import UserOption # noqa: F401
from ...environment import Environment
# XXX: prevent circular references.
# FIXME: this really is a posix interface not a c-like interface
clike_debug_args = {
False: [],
True: ['-g'],
} # type: typing.Dict[bool, typing.List[str]]
gnulike_buildtype_args = {
'plain': [],
'debug': [],
'debugoptimized': [],
'release': [],
'minsize': [],
'custom': [],
} # type: typing.Dict[str, typing.List[str]]
gnu_optimization_args = {
'0': [],
'g': ['-Og'],
'1': ['-O1'],
'2': ['-O2'],
'3': ['-O3'],
's': ['-Os'],
} # type: typing.Dict[str, typing.List[str]]
gnulike_instruction_set_args = {
'mmx': ['-mmmx'],
'sse': ['-msse'],
'sse2': ['-msse2'],
'sse3': ['-msse3'],
'ssse3': ['-mssse3'],
'sse41': ['-msse4.1'],
'sse42': ['-msse4.2'],
'avx': ['-mavx'],
'avx2': ['-mavx2'],
'neon': ['-mfpu=neon'],
} # type: typing.Dict[str, typing.List[str]]
gnu_symbol_visibility_args = {
'': [],
'default': ['-fvisibility=default'],
'internal': ['-fvisibility=internal'],
'hidden': ['-fvisibility=hidden'],
'protected': ['-fvisibility=protected'],
'inlineshidden': ['-fvisibility=hidden', '-fvisibility-inlines-hidden'],
} # type: typing.Dict[str, typing.List[str]]
gnu_color_args = {
'auto': ['-fdiagnostics-color=auto'],
'always': ['-fdiagnostics-color=always'],
'never': ['-fdiagnostics-color=never'],
} # type: typing.Dict[str, typing.List[str]]
@functools.lru_cache(maxsize=None)
def gnulike_default_include_dirs(compiler: typing.Tuple[str], lang: str) -> typing.List[str]:
if lang == 'cpp':
lang = 'c++'
env = os.environ.copy()
env["LC_ALL"] = 'C'
cmd = list(compiler) + ['-x{}'.format(lang), '-E', '-v', '-']
p = subprocess.Popen(
cmd,
stdin=subprocess.DEVNULL,
stderr=subprocess.PIPE,
stdout=subprocess.PIPE,
env=env
)
stderr = p.stderr.read().decode('utf-8', errors='replace')
parse_state = 0
paths = []
for line in stderr.split('\n'):
if parse_state == 0:
if line == '#include "..." search starts here:':
parse_state = 1
elif parse_state == 1:
if line == '#include <...> search starts here:':
parse_state = 2
else:
paths.append(line[1:])
elif parse_state == 2:
if line == 'End of search list.':
break
else:
paths.append(line[1:])
if not paths:
mlog.warning('No include directory found parsing "{cmd}" output'.format(cmd=" ".join(cmd)))
return paths
class GnuLikeCompiler(metaclass=abc.ABCMeta):
"""
GnuLikeCompiler is a common interface to all compilers implementing
the GNU-style commandline interface. This includes GCC, Clang
and ICC. Certain functionality between them is different and requires
that the actual concrete subclass define their own implementation.
"""
LINKER_PREFIX = '-Wl,'
def __init__(self):
self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage',
'b_ndebug', 'b_staticpic', 'b_pie']
if not (self.info.is_windows() or self.info.is_cygwin() or self.info.is_openbsd()):
self.base_options.append('b_lundef')
if not self.info.is_windows() or self.info.is_cygwin():
self.base_options.append('b_asneeded')
# All GCC-like backends can do assembly
self.can_compile_suffixes.add('s')
def get_pic_args(self) -> typing.List[str]:
if self.info.is_windows() or self.info.is_cygwin() or self.info.is_darwin():
return [] # On Window and OS X, pic is always on.
return ['-fPIC']
def get_pie_args(self) -> typing.List[str]:
return ['-fPIE']
def get_buildtype_args(self, buildtype: str) -> typing.List[str]:
return gnulike_buildtype_args[buildtype]
@abc.abstractmethod
def get_optimization_args(self, optimization_level: str) -> typing.List[str]:
raise NotImplementedError("get_optimization_args not implemented")
def get_debug_args(self, is_debug: bool) -> typing.List[str]:
return clike_debug_args[is_debug]
@abc.abstractmethod
def get_pch_suffix(self) -> str:
raise NotImplementedError("get_pch_suffix not implemented")
def split_shlib_to_parts(self, fname: str) -> typing.Tuple[str, str]:
return os.path.dirname(fname), fname
def get_instruction_set_args(self, instruction_set: str) -> typing.Optional[typing.List[str]]:
return gnulike_instruction_set_args.get(instruction_set, None)
def get_default_include_dirs(self) -> typing.List[str]:
return gnulike_default_include_dirs(tuple(self.exelist), self.language)
@abc.abstractmethod
def openmp_flags(self) -> typing.List[str]:
raise NotImplementedError("openmp_flags not implemented")
def gnu_symbol_visibility_args(self, vistype: str) -> typing.List[str]:
return gnu_symbol_visibility_args[vistype]
def gen_vs_module_defs_args(self, defsfile: str) -> typing.List[str]:
if not isinstance(defsfile, str):
raise RuntimeError('Module definitions file should be str')
# On Windows targets, .def files may be specified on the linker command
# line like an object file.
if self.info.is_windows() or self.info.is_cygwin():
return [defsfile]
# For other targets, discard the .def file.
return []
def get_argument_syntax(self) -> str:
return 'gcc'
def get_profile_generate_args(self) -> typing.List[str]:
return ['-fprofile-generate']
def get_profile_use_args(self) -> typing.List[str]:
return ['-fprofile-use', '-fprofile-correction']
def get_gui_app_args(self, value: bool) -> typing.List[str]:
if self.info.is_windows() or self.info.is_cygwin():
return ['-mwindows' if value else '-mconsole']
return []
def compute_parameters_with_absolute_paths(self, parameter_list: typing.List[str], build_dir: str) -> typing.List[str]:
for idx, i in enumerate(parameter_list):
if i[:2] == '-I' or i[:2] == '-L':
parameter_list[idx] = i[:2] + os.path.normpath(os.path.join(build_dir, i[2:]))
return parameter_list
@functools.lru_cache()
def _get_search_dirs(self, env: 'Environment') -> str:
extra_args = ['--print-search-dirs']
stdo = None
with self._build_wrapper('', env, extra_args=extra_args,
dependencies=None, mode='compile',
want_output=True) as p:
stdo = p.stdo
return stdo
def _split_fetch_real_dirs(self, pathstr: str) -> typing.List[str]:
# We need to use the path separator used by the compiler for printing
# lists of paths ("gcc --print-search-dirs"). By default
# we assume it uses the platform native separator.
pathsep = os.pathsep
# clang uses ':' instead of ';' on Windows https://reviews.llvm.org/D61121
# so we need to repair things like 'C:\foo:C:\bar'
if pathsep == ';':
pathstr = re.sub(r':([^/\\])', r';\1', pathstr)
# pathlib treats empty paths as '.', so filter those out
paths = [p for p in pathstr.split(pathsep) if p]
result = []
for p in paths:
# GCC returns paths like this:
# /usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/lib
# It would make sense to normalize them to get rid of the .. parts
# Sadly when you are on a merged /usr fs it also kills these:
# /lib/x86_64-linux-gnu
# since /lib is a symlink to /usr/lib. This would mean
# paths under /lib would be considered not a "system path",
# which is wrong and breaks things. Store everything, just to be sure.
pobj = pathlib.Path(p)
unresolved = pobj.as_posix()
if pobj.exists():
if unresolved not in result:
result.append(unresolved)
try:
resolved = pathlib.Path(p).resolve().as_posix()
if resolved not in result:
result.append(resolved)
except FileNotFoundError:
pass
return result
def get_compiler_dirs(self, env: 'Environment', name: str) -> typing.List[str]:
'''
Get dirs from the compiler, either `libraries:` or `programs:`
'''
stdo = self._get_search_dirs(env)
for line in stdo.split('\n'):
if line.startswith(name + ':'):
return self._split_fetch_real_dirs(line.split('=', 1)[1])
return []
def get_lto_compile_args(self) -> typing.List[str]:
return ['-flto']
def sanitizer_compile_args(self, value: str) -> typing.List[str]:
if value == 'none':
return []
args = ['-fsanitize=' + value]
if 'address' in value: # for -fsanitize=address,undefined
args.append('-fno-omit-frame-pointer')
return args
def get_output_args(self, target: str) -> typing.List[str]:
return ['-o', target]
def get_dependency_gen_args(self, outtarget, outfile):
return ['-MD', '-MQ', outtarget, '-MF', outfile]
def get_compile_only_args(self) -> typing.List[str]:
return ['-c']
def get_include_args(self, path: str, is_system: bool) -> typing.List[str]:
if not path:
path = '.'
if is_system:
return ['-isystem' + path]
return ['-I' + path]
class GnuCompiler(GnuLikeCompiler):
"""
GnuCompiler represents an actual GCC in its many incarnations.
Compilers imitating GCC (Clang/Intel) should use the GnuLikeCompiler ABC.
"""
def __init__(self, defines: typing.Dict[str, str]):
super().__init__()
self.id = 'gcc'
self.defines = defines or {}
self.base_options.append('b_colorout')
def get_colorout_args(self, colortype: str) -> typing.List[str]:
if mesonlib.version_compare(self.version, '>=4.9.0'):
return gnu_color_args[colortype][:]
return []
def get_warn_args(self, level: str) -> typing.List[str]:
args = super().get_warn_args(level)
if mesonlib.version_compare(self.version, '<4.8.0') and '-Wpedantic' in args:
# -Wpedantic was added in 4.8.0
# https://gcc.gnu.org/gcc-4.8/changes.html
args[args.index('-Wpedantic')] = '-pedantic'
return args
def has_builtin_define(self, define: str) -> bool:
return define in self.defines
def get_builtin_define(self, define: str) -> typing.Optional[str]:
if define in self.defines:
return self.defines[define]
return None
def get_optimization_args(self, optimization_level: str) -> typing.List[str]:
return gnu_optimization_args[optimization_level]
def get_pch_suffix(self) -> str:
return 'gch'
def openmp_flags(self) -> typing.List[str]:
return ['-fopenmp']
def has_arguments(self, args, env, code, mode):
# For some compiler command line arguments, the GNU compilers will
# emit a warning on stderr indicating that an option is valid for a
# another language, but still complete with exit_success
with self._build_wrapper(code, env, args, None, mode, disable_cache=False, want_output=True) as p:
result = p.returncode == 0
if self.language in {'cpp', 'objcpp'} and 'is valid for C/ObjC' in p.stde:
result = False
if self.language in {'c', 'objc'} and 'is valid for C++/ObjC++' in p.stde:
result = False
return result, p.cached