Converted compilers.py to a sub-package

1 files changed, 0 insertions, 3213 deletions

diff --git a/mesonbuild/compilers.py b/mesonbuild/compilers.py
deleted file mode 100644
index a1b2af7..0000000
--- a/mesonbuild/compilers.py
+++ /dev/null
@@ -1,3213 +0,0 @@
-# Copyright 2012-2017 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.
-
-import contextlib, os.path, re, shutil, subprocess, tempfile
-
-from .linkers import StaticLinker
-from . import coredata
-from . import mlog
-from . import mesonlib
-from .mesonlib import EnvironmentException, MesonException, version_compare, Popen_safe
-
-"""This file contains the data files of all compilers Meson knows
-about. To support a new compiler, add its information below.
-Also add corresponding autodetection code in environment.py."""
-
-header_suffixes = ('h', 'hh', 'hpp', 'hxx', 'H', 'ipp', 'moc', 'vapi', 'di')
-obj_suffixes = ('o', 'obj', 'res')
-lib_suffixes = ('a', 'lib', 'dll', 'dylib', 'so')
-# Mapping of language to suffixes of files that should always be in that language
-# This means we can't include .h headers here since they could be C, C++, ObjC, etc.
-lang_suffixes = {
-    'c': ('c',),
-    'cpp': ('cpp', 'cc', 'cxx', 'c++', 'hh', 'hpp', 'ipp', 'hxx'),
-    # f90, f95, f03, f08 are for free-form fortran ('f90' recommended)
-    # f, for, ftn, fpp are for fixed-form fortran ('f' or 'for' recommended)
-    'fortran': ('f90', 'f95', 'f03', 'f08', 'f', 'for', 'ftn', 'fpp'),
-    'd': ('d', 'di'),
-    'objc': ('m',),
-    'objcpp': ('mm',),
-    'rust': ('rs',),
-    'vala': ('vala', 'vapi'),
-    'cs': ('cs',),
-    'swift': ('swift',),
-    'java': ('java',),
-}
-cpp_suffixes = lang_suffixes['cpp'] + ('h',)
-c_suffixes = lang_suffixes['c'] + ('h',)
-# List of languages that can be linked with C code directly by the linker
-# used in build.py:process_compilers() and build.py:get_dynamic_linker()
-clike_langs = ('objcpp', 'objc', 'd', 'cpp', 'c', 'fortran',)
-clike_suffixes = ()
-for _l in clike_langs:
-    clike_suffixes += lang_suffixes[_l]
-clike_suffixes += ('h', 'll', 's')
-
-# All these are only for C-like languages; see `clike_langs` above.
-
-def sort_clike(lang):
-    '''
-    Sorting function to sort the list of languages according to
-    reversed(compilers.clike_langs) and append the unknown langs in the end.
-    The purpose is to prefer C over C++ for files that can be compiled by
-    both such as assembly, C, etc. Also applies to ObjC, ObjC++, etc.
-    '''
-    if lang not in clike_langs:
-        return 1
-    return -clike_langs.index(lang)
-
-def is_header(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    suffix = fname.split('.')[-1]
-    return suffix in header_suffixes
-
-def is_source(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    suffix = fname.split('.')[-1].lower()
-    return suffix in clike_suffixes
-
-def is_assembly(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    return fname.split('.')[-1].lower() == 's'
-
-def is_llvm_ir(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    return fname.split('.')[-1] == 'll'
-
-def is_object(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    suffix = fname.split('.')[-1]
-    return suffix in obj_suffixes
-
-def is_library(fname):
-    if hasattr(fname, 'fname'):
-        fname = fname.fname
-    suffix = fname.split('.')[-1]
-    return suffix in lib_suffixes
-
-gnulike_buildtype_args = {'plain': [],
-                          # -O0 is passed for improved debugging information with gcc
-                          # See https://github.com/mesonbuild/meson/pull/509
-                          'debug': ['-O0', '-g'],
-                          'debugoptimized': ['-O2', '-g'],
-                          'release': ['-O3'],
-                          'minsize': ['-Os', '-g']}
-
-msvc_buildtype_args = {'plain': [],
-                       'debug': ["/MDd", "/ZI", "/Ob0", "/Od", "/RTC1"],
-                       'debugoptimized': ["/MD", "/Zi", "/O2", "/Ob1"],
-                       'release': ["/MD", "/O2", "/Ob2"],
-                       'minsize': ["/MD", "/Zi", "/Os", "/Ob1"],
-                       }
-
-apple_buildtype_linker_args = {'plain': [],
-                               'debug': [],
-                               'debugoptimized': [],
-                               'release': [],
-                               'minsize': [],
-                               }
-
-gnulike_buildtype_linker_args = {'plain': [],
-                                 'debug': [],
-                                 'debugoptimized': [],
-                                 'release': ['-Wl,-O1'],
-                                 'minsize': [],
-                                 }
-
-msvc_buildtype_linker_args = {'plain': [],
-                              'debug': [],
-                              'debugoptimized': [],
-                              'release': [],
-                              'minsize': ['/INCREMENTAL:NO'],
-                              }
-
-java_buildtype_args = {'plain': [],
-                       'debug': ['-g'],
-                       'debugoptimized': ['-g'],
-                       'release': [],
-                       'minsize': [],
-                       }
-
-rust_buildtype_args = {'plain': [],
-                       'debug': ['-C', 'debuginfo=2'],
-                       'debugoptimized': ['-C', 'debuginfo=2', '-C', 'opt-level=2'],
-                       'release': ['-C', 'opt-level=3'],
-                       'minsize': [], # In a future release: ['-C', 'opt-level=s'],
-                       }
-
-d_gdc_buildtype_args = {'plain': [],
-                        'debug': ['-g', '-O0'],
-                        'debugoptimized': ['-g', '-O'],
-                        'release': ['-O3', '-frelease'],
-                        'minsize': [],
-                        }
-
-d_ldc_buildtype_args = {'plain': [],
-                        'debug': ['-g', '-O0'],
-                        'debugoptimized': ['-g', '-O'],
-                        'release': ['-O3', '-release'],
-                        'minsize': [],
-                        }
-
-d_dmd_buildtype_args = {'plain': [],
-                        'debug': ['-g'],
-                        'debugoptimized': ['-g', '-O'],
-                        'release': ['-O', '-release'],
-                        'minsize': [],
-                        }
-
-mono_buildtype_args = {'plain': [],
-                       'debug': ['-debug'],
-                       'debugoptimized': ['-debug', '-optimize+'],
-                       'release': ['-optimize+'],
-                       'minsize': [],
-                       }
-
-swift_buildtype_args = {'plain': [],
-                        'debug': ['-g'],
-                        'debugoptimized': ['-g', '-O'],
-                        'release': ['-O'],
-                        'minsize': [],
-                        }
-
-gnu_winlibs = ['-lkernel32', '-luser32', '-lgdi32', '-lwinspool', '-lshell32',
-               '-lole32', '-loleaut32', '-luuid', '-lcomdlg32', '-ladvapi32']
-
-msvc_winlibs = ['kernel32.lib', 'user32.lib', 'gdi32.lib',
-                'winspool.lib', 'shell32.lib', 'ole32.lib', 'oleaut32.lib',
-                'uuid.lib', 'comdlg32.lib', 'advapi32.lib']
-
-gnu_color_args = {'auto': ['-fdiagnostics-color=auto'],
-                  'always': ['-fdiagnostics-color=always'],
-                  'never': ['-fdiagnostics-color=never'],
-                  }
-
-clang_color_args = {'auto': ['-Xclang', '-fcolor-diagnostics'],
-                    'always': ['-Xclang', '-fcolor-diagnostics'],
-                    'never': ['-Xclang', '-fno-color-diagnostics'],
-                    }
-
-base_options = {'b_pch': coredata.UserBooleanOption('b_pch', 'Use precompiled headers', True),
-                'b_lto': coredata.UserBooleanOption('b_lto', 'Use link time optimization', False),
-                'b_sanitize': coredata.UserComboOption('b_sanitize',
-                                                       'Code sanitizer to use',
-                                                       ['none', 'address', 'thread', 'undefined', 'memory'],
-                                                       'none'),
-                'b_lundef': coredata.UserBooleanOption('b_lundef', 'Use -Wl,--no-undefined when linking', True),
-                'b_asneeded': coredata.UserBooleanOption('b_asneeded', 'Use -Wl,--as-needed when linking', True),
-                'b_pgo': coredata.UserComboOption('b_pgo', 'Use profile guide optimization',
-                                                  ['off', 'generate', 'use'],
-                                                  'off'),
-                'b_coverage': coredata.UserBooleanOption('b_coverage',
-                                                         'Enable coverage tracking.',
-                                                         False),
-                'b_colorout': coredata.UserComboOption('b_colorout', 'Use colored output',
-                                                       ['auto', 'always', 'never'],
-                                                       'always'),
-                'b_ndebug': coredata.UserBooleanOption('b_ndebug',
-                                                       'Disable asserts',
-                                                       False),
-                'b_staticpic': coredata.UserBooleanOption('b_staticpic',
-                                                          'Build static libraries as position independent',
-                                                          True),
-                }
-
-def sanitizer_compile_args(value):
-    if value == 'none':
-        return []
-    args = ['-fsanitize=' + value]
-    if value == 'address':
-        args.append('-fno-omit-frame-pointer')
-    return args
-
-def sanitizer_link_args(value):
-    if value == 'none':
-        return []
-    args = ['-fsanitize=' + value]
-    return args
-
-def get_base_compile_args(options, compiler):
-    args = []
-    # FIXME, gcc/clang specific.
-    try:
-        if options['b_lto'].value:
-            args.append('-flto')
-    except KeyError:
-        pass
-    try:
-        args += compiler.get_colorout_args(options['b_colorout'].value)
-    except KeyError:
-        pass
-    try:
-        args += sanitizer_compile_args(options['b_sanitize'].value)
-    except KeyError:
-        pass
-    try:
-        pgo_val = options['b_pgo'].value
-        if pgo_val == 'generate':
-            args.append('-fprofile-generate')
-        elif pgo_val == 'use':
-            args.append('-fprofile-use')
-    except KeyError:
-        pass
-    try:
-        if options['b_coverage'].value:
-            args += compiler.get_coverage_args()
-    except KeyError:
-        pass
-    try:
-        if options['b_ndebug'].value:
-            args += ['-DNDEBUG']
-    except KeyError:
-        pass
-    return args
-
-def get_base_link_args(options, linker, is_shared_module):
-    args = []
-    # FIXME, gcc/clang specific.
-    try:
-        if options['b_lto'].value:
-            args.append('-flto')
-    except KeyError:
-        pass
-    try:
-        args += sanitizer_link_args(options['b_sanitize'].value)
-    except KeyError:
-        pass
-    try:
-        pgo_val = options['b_pgo'].value
-        if pgo_val == 'generate':
-            args.append('-fprofile-generate')
-        elif pgo_val == 'use':
-            args.append('-fprofile-use')
-    except KeyError:
-        pass
-    try:
-        if not is_shared_module and 'b_lundef' in linker.base_options and options['b_lundef'].value:
-            args.append('-Wl,--no-undefined')
-    except KeyError:
-        pass
-    try:
-        if 'b_asneeded' in linker.base_options and options['b_asneeded'].value:
-            args.append('-Wl,--as-needed')
-    except KeyError:
-        pass
-    try:
-        if options['b_coverage'].value:
-            args += linker.get_coverage_link_args()
-    except KeyError:
-        pass
-    return args
-
-class CrossNoRunException(MesonException):
-    pass
-
-class RunResult:
-    def __init__(self, compiled, returncode=999, stdout='UNDEFINED', stderr='UNDEFINED'):
-        self.compiled = compiled
-        self.returncode = returncode
-        self.stdout = stdout
-        self.stderr = stderr
-
-class CompilerArgs(list):
-    '''
-    Class derived from list() that manages a list of compiler arguments. Should
-    be used while constructing compiler arguments from various sources. Can be
-    operated with ordinary lists, so this does not need to be used everywhere.
-
-    All arguments must be inserted and stored in GCC-style (-lfoo, -Idir, etc)
-    and can converted to the native type of each compiler by using the
-    .to_native() method to which you must pass an instance of the compiler or
-    the compiler class.
-
-    New arguments added to this class (either with .append(), .extend(), or +=)
-    are added in a way that ensures that they override previous arguments.
-    For example:
-
-    >>> a = ['-Lfoo', '-lbar']
-    >>> a += ['-Lpho', '-lbaz']
-    >>> print(a)
-    ['-Lpho', '-Lfoo', '-lbar', '-lbaz']
-
-    Arguments will also be de-duped if they can be de-duped safely.
-
-    Note that because of all this, this class is not commutative and does not
-    preserve the order of arguments if it is safe to not. For example:
-    >>> ['-Ifoo', '-Ibar'] + ['-Ifez', '-Ibaz', '-Werror']
-    ['-Ifez', '-Ibaz', '-Ifoo', '-Ibar', '-Werror']
-    >>> ['-Ifez', '-Ibaz', '-Werror'] + ['-Ifoo', '-Ibar']
-    ['-Ifoo', '-Ibar', '-Ifez', '-Ibaz', '-Werror']
-
-    '''
-    # NOTE: currently this class is only for C-like compilers, but it can be
-    # extended to other languages easily. Just move the following to the
-    # compiler class and initialize when self.compiler is set.
-
-    # Arg prefixes that override by prepending instead of appending
-    prepend_prefixes = ('-I', '-L')
-    # Arg prefixes and args that must be de-duped by returning 2
-    dedup2_prefixes = ('-I', '-L', '-D', '-U')
-    dedup2_suffixes = ()
-    dedup2_args = ()
-    # Arg prefixes and args that must be de-duped by returning 1
-    dedup1_prefixes = ('-l',)
-    dedup1_suffixes = ('.lib', '.dll', '.so', '.dylib', '.a')
-    # Match a .so of the form path/to/libfoo.so.0.1.0
-    # Only UNIX shared libraries require this. Others have a fixed extension.
-    dedup1_regex = re.compile(r'([\/\\]|\A)lib.*\.so(\.[0-9]+)?(\.[0-9]+)?(\.[0-9]+)?$')
-    dedup1_args = ('-c', '-S', '-E', '-pipe', '-pthread')
-    compiler = None
-
-    def _check_args(self, args):
-        cargs = []
-        if len(args) > 2:
-            raise TypeError("CompilerArgs() only accepts at most 2 arguments: "
-                            "The compiler, and optionally an initial list")
-        elif not args:
-            return cargs
-        elif len(args) == 1:
-            if isinstance(args[0], (Compiler, StaticLinker)):
-                self.compiler = args[0]
-            else:
-                raise TypeError("you must pass a Compiler instance as one of "
-                                "the arguments")
-        elif len(args) == 2:
-            if isinstance(args[0], (Compiler, StaticLinker)):
-                self.compiler = args[0]
-                cargs = args[1]
-            elif isinstance(args[1], (Compiler, StaticLinker)):
-                cargs = args[0]
-                self.compiler = args[1]
-            else:
-                raise TypeError("you must pass a Compiler instance as one of "
-                                "the two arguments")
-        else:
-            raise AssertionError('Not reached')
-        return cargs
-
-    def __init__(self, *args):
-        super().__init__(self._check_args(args))
-
-    @classmethod
-    def _can_dedup(cls, arg):
-        '''
-        Returns whether the argument can be safely de-duped. This is dependent
-        on three things:
-
-        a) Whether an argument can be 'overriden' by a later argument.  For
-           example, -DFOO defines FOO and -UFOO undefines FOO. In this case, we
-           can safely remove the previous occurance and add a new one. The same
-           is true for include paths and library paths with -I and -L. For
-           these we return `2`. See `dedup2_prefixes` and `dedup2_args`.
-        b) Arguments that once specified cannot be undone, such as `-c` or
-           `-pipe`. New instances of these can be completely skipped. For these
-           we return `1`. See `dedup1_prefixes` and `dedup1_args`.
-        c) Whether it matters where or how many times on the command-line
-           a particular argument is present. This can matter for symbol
-           resolution in static or shared libraries, so we cannot de-dup or
-           reorder them. For these we return `0`. This is the default.
-
-        In addition to these, we handle library arguments specially.
-        With GNU ld, we surround library arguments with -Wl,--start/end-group
-        to recursively search for symbols in the libraries. This is not needed
-        with other linkers.
-        '''
-
-        # A standalone argument must never be deduplicated because it is
-        # defined by what comes _after_ it. Thus dedupping this:
-        # -D FOO -D BAR
-        # would yield either
-        # -D FOO BAR
-        # or
-        # FOO -D BAR
-        # both of which are invalid.
-        if arg in cls.dedup2_prefixes:
-            return 0
-        if arg in cls.dedup2_args or \
-           arg.startswith(cls.dedup2_prefixes) or \
-           arg.endswith(cls.dedup2_suffixes):
-            return 2
-        if arg in cls.dedup1_args or \
-           arg.startswith(cls.dedup1_prefixes) or \
-           arg.endswith(cls.dedup1_suffixes) or \
-           re.search(cls.dedup1_regex, arg):
-            return 1
-        return 0
-
-    @classmethod
-    def _should_prepend(cls, arg):
-        if arg.startswith(cls.prepend_prefixes):
-            return True
-        return False
-
-    def to_native(self):
-        # Check if we need to add --start/end-group for circular dependencies
-        # between static libraries.
-        if get_compiler_uses_gnuld(self.compiler):
-            group_started = False
-            for each in self:
-                if not each.startswith('-l') and not each.endswith('.a'):
-                    continue
-                i = self.index(each)
-                if not group_started:
-                    # First occurance of a library
-                    self.insert(i, '-Wl,--start-group')
-                    group_started = True
-            # Last occurance of a library
-            if group_started:
-                self.insert(i + 1, '-Wl,--end-group')
-        return self.compiler.unix_args_to_native(self)
-
-    def append_direct(self, arg):
-        '''
-        Append the specified argument without any reordering or de-dup
-        '''
-        super().append(arg)
-
-    def extend_direct(self, iterable):
-        '''
-        Extend using the elements in the specified iterable without any
-        reordering or de-dup
-        '''
-        super().extend(iterable)
-
-    def __add__(self, args):
-        new = CompilerArgs(self, self.compiler)
-        new += args
-        return new
-
-    def __iadd__(self, args):
-        '''
-        Add two CompilerArgs while taking into account overriding of arguments
-        and while preserving the order of arguments as much as possible
-        '''
-        pre = []
-        post = []
-        if not isinstance(args, list):
-            raise TypeError('can only concatenate list (not "{}") to list'.format(args))
-        for arg in args:
-            # If the argument can be de-duped, do it either by removing the
-            # previous occurance of it and adding a new one, or not adding the
-            # new occurance.
-            dedup = self._can_dedup(arg)
-            if dedup == 1:
-                # Argument already exists and adding a new instance is useless
-                if arg in self or arg in pre or arg in post:
-                    continue
-            if dedup == 2:
-                # Remove all previous occurances of the arg and add it anew
-                if arg in self:
-                    self.remove(arg)
-                if arg in pre:
-                    pre.remove(arg)
-                if arg in post:
-                    post.remove(arg)
-            if self._should_prepend(arg):
-                pre.append(arg)
-            else:
-                post.append(arg)
-        # Insert at the beginning
-        self[:0] = pre
-        # Append to the end
-        super().__iadd__(post)
-        return self
-
-    def __radd__(self, args):
-        new = CompilerArgs(args, self.compiler)
-        new += self
-        return new
-
-    def __mul__(self, args):
-        raise TypeError("can't multiply compiler arguments")
-
-    def __imul__(self, args):
-        raise TypeError("can't multiply compiler arguments")
-
-    def __rmul__(self, args):
-        raise TypeError("can't multiply compiler arguments")
-
-    def append(self, arg):
-        self.__iadd__([arg])
-
-    def extend(self, args):
-        self.__iadd__(args)
-
-class Compiler:
-    def __init__(self, exelist, version):
-        if isinstance(exelist, str):
-            self.exelist = [exelist]
-        elif isinstance(exelist, list):
-            self.exelist = exelist
-        else:
-            raise TypeError('Unknown argument to Compiler')
-        # In case it's been overriden by a child class already
-        if not hasattr(self, 'file_suffixes'):
-            self.file_suffixes = lang_suffixes[self.language]
-        if not hasattr(self, 'can_compile_suffixes'):
-            self.can_compile_suffixes = set(self.file_suffixes)
-        self.default_suffix = self.file_suffixes[0]
-        self.version = version
-        self.base_options = []
-
-    def __repr__(self):
-        repr_str = "<{0}: v{1} `{2}`>"
-        return repr_str.format(self.__class__.__name__, self.version,
-                               ' '.join(self.exelist))
-
-    def can_compile(self, src):
-        if hasattr(src, 'fname'):
-            src = src.fname
-        suffix = os.path.splitext(src)[1].lower()
-        if suffix and suffix[1:] in self.can_compile_suffixes:
-            return True
-        return False
-
-    def get_id(self):
-        return self.id
-
-    def get_language(self):
-        return self.language
-
-    def get_default_suffix(self):
-        return self.default_suffix
-
-    def get_exelist(self):
-        return self.exelist[:]
-
-    def get_builtin_define(self, *args, **kwargs):
-        raise EnvironmentException('%s does not support get_builtin_define.' % self.id)
-
-    def has_builtin_define(self, *args, **kwargs):
-        raise EnvironmentException('%s does not support has_builtin_define.' % self.id)
-
-    def get_always_args(self):
-        return []
-
-    def get_linker_always_args(self):
-        return []
-
-    def gen_import_library_args(self, implibname):
-        """
-        Used only on Windows for libraries that need an import library.
-        This currently means C, C++, Fortran.
-        """
-        return []
-
-    def get_options(self):
-        return {} # build afresh every time
-
-    def get_option_compile_args(self, options):
-        return []
-
-    def get_option_link_args(self, options):
-        return []
-
-    def has_header(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support header checks.' % self.language)
-
-    def has_header_symbol(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support header symbol checks.' % self.language)
-
-    def compiles(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support compile checks.' % self.language)
-
-    def links(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support link checks.' % self.language)
-
-    def run(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support run checks.' % self.language)
-
-    def sizeof(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support sizeof checks.' % self.language)
-
-    def alignment(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support alignment checks.' % self.language)
-
-    def has_function(self, *args, **kwargs):
-        raise EnvironmentException('Language %s does not support function checks.' % self.language)
-
-    @classmethod
-    def unix_args_to_native(cls, args):
-        "Always returns a copy that can be independently mutated"
-        return args[:]
-
-    def find_library(self, *args, **kwargs):
-        raise EnvironmentException('Language {} does not support library finding.'.format(self.language))
-
-    def get_library_dirs(self):
-        return []
-
-    def has_argument(self, arg, env):
-        return self.has_multi_arguments([arg], env)
-
-    def has_multi_arguments(self, args, env):
-        raise EnvironmentException(
-            'Language {} does not support has_multi_arguments.'.format(
-                self.language))
-
-    def get_cross_extra_flags(self, environment, link):
-        extra_flags = []
-        if self.is_cross and environment:
-            if 'properties' in environment.cross_info.config:
-                props = environment.cross_info.config['properties']
-                lang_args_key = self.language + '_args'
-                extra_flags += props.get(lang_args_key, [])
-                lang_link_args_key = self.language + '_link_args'
-                if link:
-                    extra_flags += props.get(lang_link_args_key, [])
-        return extra_flags
-
-    def _get_compile_output(self, dirname, mode):
-        # In pre-processor mode, the output is sent to stdout and discarded
-        if mode == 'preprocess':
-            return None
-        # Extension only matters if running results; '.exe' is
-        # guaranteed to be executable on every platform.
-        if mode == 'link':
-            suffix = 'exe'
-        else:
-            suffix = 'obj'
-        return os.path.join(dirname, 'output.' + suffix)
-
-    @contextlib.contextmanager
-    def compile(self, code, extra_args=None, mode='link'):
-        if extra_args is None:
-            extra_args = []
-        try:
-            with tempfile.TemporaryDirectory() as tmpdirname:
-                if isinstance(code, str):
-                    srcname = os.path.join(tmpdirname,
-                                           'testfile.' + self.default_suffix)
-                    with open(srcname, 'w') as ofile:
-                        ofile.write(code)
-                elif isinstance(code, mesonlib.File):
-                    srcname = code.fname
-                output = self._get_compile_output(tmpdirname, mode)
-
-                # Construct the compiler command-line
-                commands = CompilerArgs(self)
-                commands.append(srcname)
-                commands += extra_args
-                commands += self.get_always_args()
-                if mode == 'compile':
-                    commands += self.get_compile_only_args()
-                # Preprocess mode outputs to stdout, so no output args
-                if mode == 'preprocess':
-                    commands += self.get_preprocess_only_args()
-                else:
-                    commands += self.get_output_args(output)
-                # Generate full command-line with the exelist
-                commands = self.get_exelist() + commands.to_native()
-                mlog.debug('Running compile:')
-                mlog.debug('Working directory: ', tmpdirname)
-                mlog.debug('Command line: ', ' '.join(commands), '\n')
-                mlog.debug('Code:\n', code)
-                p, p.stdo, p.stde = Popen_safe(commands, cwd=tmpdirname)
-                mlog.debug('Compiler stdout:\n', p.stdo)
-                mlog.debug('Compiler stderr:\n', p.stde)
-                p.input_name = srcname
-                p.output_name = output
-                yield p
-        except (PermissionError, OSError):
-            # On Windows antivirus programs and the like hold on to files so
-            # they can't be deleted. There's not much to do in this case. Also,
-            # catch OSError because the directory is then no longer empty.
-            pass
-
-    def get_colorout_args(self, colortype):
-        return []
-
-    # Some compilers (msvc) write debug info to a separate file.
-    # These args specify where it should be written.
-    def get_compile_debugfile_args(self, rel_obj, **kwargs):
-        return []
-
-    def get_link_debugfile_args(self, rel_obj):
-        return []
-
-    def get_std_shared_lib_link_args(self):
-        return []
-
-    def get_std_shared_module_link_args(self):
-        return self.get_std_shared_lib_link_args()
-
-    def get_link_whole_for(self, args):
-        if isinstance(args, list) and not args:
-            return []
-        raise EnvironmentException('Language %s does not support linking whole archives.' % self.language)
-
-    def build_unix_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        if not rpath_paths and not install_rpath:
-            return []
-        # The rpaths we write must be relative, because otherwise
-        # they have different length depending on the build
-        # directory. This breaks reproducible builds.
-        rel_rpaths = []
-        for p in rpath_paths:
-            if p == from_dir:
-                relative = '' # relpath errors out in this case
-            else:
-                relative = os.path.relpath(p, from_dir)
-            rel_rpaths.append(relative)
-        paths = ':'.join([os.path.join('$ORIGIN', p) for p in rel_rpaths])
-        if len(paths) < len(install_rpath):
-            padding = 'X' * (len(install_rpath) - len(paths))
-            if not paths:
-                paths = padding
-            else:
-                paths = paths + ':' + padding
-        args = ['-Wl,-rpath,' + paths]
-        if get_compiler_is_linuxlike(self):
-            # Rpaths to use while linking must be absolute. These are not
-            # written to the binary. Needed only with GNU ld:
-            # https://sourceware.org/bugzilla/show_bug.cgi?id=16936
-            # Not needed on Windows or other platforms that don't use RPATH
-            # https://github.com/mesonbuild/meson/issues/1897
-            lpaths = ':'.join([os.path.join(build_dir, p) for p in rpath_paths])
-            args += ['-Wl,-rpath-link,' + lpaths]
-        return args
-
-class CCompiler(Compiler):
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        # If a child ObjC or CPP class has already set it, don't set it ourselves
-        if not hasattr(self, 'language'):
-            self.language = 'c'
-        super().__init__(exelist, version)
-        self.id = 'unknown'
-        self.is_cross = is_cross
-        self.can_compile_suffixes.add('h')
-        if isinstance(exe_wrapper, str):
-            self.exe_wrapper = [exe_wrapper]
-        else:
-            self.exe_wrapper = exe_wrapper
-
-    def needs_static_linker(self):
-        return True # When compiling static libraries, so yes.
-
-    def get_always_args(self):
-        '''
-        Args that are always-on for all C compilers other than MSVC
-        '''
-        return ['-pipe'] + get_largefile_args(self)
-
-    def get_linker_debug_crt_args(self):
-        """
-        Arguments needed to select a debug crt for the linker
-        This is only needed for MSVC
-        """
-        return []
-
-    def get_no_stdinc_args(self):
-        return ['-nostdinc']
-
-    def get_no_stdlib_link_args(self):
-        return ['-nostdlib']
-
-    def get_warn_args(self, level):
-        return self.warn_args[level]
-
-    def get_no_warn_args(self):
-        # Almost every compiler uses this for disabling warnings
-        return ['-w']
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return []
-
-    def split_shlib_to_parts(self, fname):
-        return None, fname
-
-    # The default behavior is this, override in MSVC
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return self.build_unix_rpath_args(build_dir, from_dir, rpath_paths, install_rpath)
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return ['-MMD', '-MQ', outtarget, '-MF', outfile]
-
-    def depfile_for_object(self, objfile):
-        return objfile + '.' + self.get_depfile_suffix()
-
-    def get_depfile_suffix(self):
-        return 'd'
-
-    def get_exelist(self):
-        return self.exelist[:]
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def get_preprocess_only_args(self):
-        return ['-E', '-P']
-
-    def get_compile_only_args(self):
-        return ['-c']
-
-    def get_no_optimization_args(self):
-        return ['-O0']
-
-    def get_compiler_check_args(self):
-        '''
-        Get arguments useful for compiler checks such as being permissive in
-        the code quality and not doing any optimization.
-        '''
-        return self.get_no_optimization_args()
-
-    def get_output_args(self, target):
-        return ['-o', target]
-
-    def get_linker_output_args(self, outputname):
-        return ['-o', outputname]
-
-    def get_coverage_args(self):
-        return ['--coverage']
-
-    def get_coverage_link_args(self):
-        return ['--coverage']
-
-    def get_werror_args(self):
-        return ['-Werror']
-
-    def get_std_exe_link_args(self):
-        return []
-
-    def get_include_args(self, path, is_system):
-        if path == '':
-            path = '.'
-        if is_system:
-            return ['-isystem', path]
-        return ['-I' + path]
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared']
-
-    def get_library_dirs(self):
-        stdo = Popen_safe(self.exelist + ['--print-search-dirs'])[1]
-        for line in stdo.split('\n'):
-            if line.startswith('libraries:'):
-                libstr = line.split('=', 1)[1]
-                return libstr.split(':')
-        return []
-
-    def get_pic_args(self):
-        return ['-fPIC']
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def get_pch_use_args(self, pch_dir, header):
-        return ['-include', os.path.split(header)[-1]]
-
-    def get_pch_name(self, header_name):
-        return os.path.split(header_name)[-1] + '.' + self.get_pch_suffix()
-
-    def get_linker_search_args(self, dirname):
-        return ['-L' + dirname]
-
-    def gen_import_library_args(self, implibname):
-        """
-        The name of the outputted import library
-
-        This implementation is used only on Windows by compilers that use GNU ld
-        """
-        return ['-Wl,--out-implib=' + implibname]
-
-    def sanity_check_impl(self, work_dir, environment, sname, code):
-        mlog.debug('Sanity testing ' + self.language + ' compiler:', ' '.join(self.exelist))
-        mlog.debug('Is cross compiler: %s.' % str(self.is_cross))
-
-        extra_flags = []
-        source_name = os.path.join(work_dir, sname)
-        binname = sname.rsplit('.', 1)[0]
-        if self.is_cross:
-            binname += '_cross'
-            if self.exe_wrapper is None:
-                # Linking cross built apps is painful. You can't really
-                # tell if you should use -nostdlib or not and for example
-                # on OSX the compiler binary is the same but you need
-                # a ton of compiler flags to differentiate between
-                # arm and x86_64. So just compile.
-                extra_flags += self.get_cross_extra_flags(environment, link=False)
-                extra_flags += self.get_compile_only_args()
-            else:
-                extra_flags += self.get_cross_extra_flags(environment, link=True)
-        # Is a valid executable output for all toolchains and platforms
-        binname += '.exe'
-        # Write binary check source
-        binary_name = os.path.join(work_dir, binname)
-        with open(source_name, 'w') as ofile:
-            ofile.write(code)
-        # Compile sanity check
-        cmdlist = self.exelist + extra_flags + [source_name] + self.get_output_args(binary_name)
-        pc, stdo, stde = Popen_safe(cmdlist, cwd=work_dir)
-        mlog.debug('Sanity check compiler command line:', ' '.join(cmdlist))
-        mlog.debug('Sanity check compile stdout:')
-        mlog.debug(stdo)
-        mlog.debug('-----\nSanity check compile stderr:')
-        mlog.debug(stde)
-        mlog.debug('-----')
-        if pc.returncode != 0:
-            raise EnvironmentException('Compiler {0} can not compile programs.'.format(self.name_string()))
-        # Run sanity check
-        if self.is_cross:
-            if self.exe_wrapper is None:
-                # Can't check if the binaries run so we have to assume they do
-                return
-            cmdlist = self.exe_wrapper + [binary_name]
-        else:
-            cmdlist = [binary_name]
-        mlog.debug('Running test binary command: ' + ' '.join(cmdlist))
-        pe = subprocess.Popen(cmdlist)
-        pe.wait()
-        if pe.returncode != 0:
-            raise EnvironmentException('Executables created by {0} compiler {1} are not runnable.'.format(self.language, self.name_string()))
-
-    def sanity_check(self, work_dir, environment):
-        code = 'int main(int argc, char **argv) { int class=0; return class; }\n'
-        return self.sanity_check_impl(work_dir, environment, 'sanitycheckc.c', code)
-
-    def has_header(self, hname, prefix, env, extra_args=None, dependencies=None):
-        fargs = {'prefix': prefix, 'header': hname}
-        code = '''{prefix}
-        #ifdef __has_include
-         #if !__has_include("{header}")
-          #error "Header '{header}' could not be found"
-         #endif
-        #else
-         #include <{header}>
-        #endif'''
-        return self.compiles(code.format(**fargs), env, extra_args,
-                             dependencies, 'preprocess')
-
-    def has_header_symbol(self, hname, symbol, prefix, env, extra_args=None, dependencies=None):
-        fargs = {'prefix': prefix, 'header': hname, 'symbol': symbol}
-        t = '''{prefix}
-        #include <{header}>
-        int main () {{
-            /* If it's not defined as a macro, try to use as a symbol */
-            #ifndef {symbol}
-                {symbol};
-            #endif
-        }}'''
-        return self.compiles(t.format(**fargs), env, extra_args, dependencies)
-
-    def _get_compiler_check_args(self, env, extra_args, dependencies, mode='compile'):
-        if extra_args is None:
-            extra_args = []
-        elif isinstance(extra_args, str):
-            extra_args = [extra_args]
-        if dependencies is None:
-            dependencies = []
-        elif not isinstance(dependencies, list):
-            dependencies = [dependencies]
-        # Collect compiler arguments
-        args = CompilerArgs(self)
-        for d in dependencies:
-            # Add compile flags needed by dependencies
-            args += d.get_compile_args()
-            if mode == 'link':
-                # Add link flags needed to find dependencies
-                args += d.get_link_args()
-        # Select a CRT if needed since we're linking
-        if mode == 'link':
-            args += self.get_linker_debug_crt_args()
-        # Read c_args/cpp_args/etc from the cross-info file (if needed)
-        args += self.get_cross_extra_flags(env, link=(mode == 'link'))
-        if not self.is_cross:
-            if mode == 'preprocess':
-                # Add CPPFLAGS from the env.
-                args += env.coredata.external_preprocess_args[self.language]
-            elif mode == 'compile':
-                # Add CFLAGS/CXXFLAGS/OBJCFLAGS/OBJCXXFLAGS from the env
-                args += env.coredata.external_args[self.language]
-            elif mode == 'link':
-                # Add LDFLAGS from the env
-                args += env.coredata.external_link_args[self.language]
-        args += self.get_compiler_check_args()
-        # extra_args must override all other arguments, so we add them last
-        args += extra_args
-        return args
-
-    def compiles(self, code, env, extra_args=None, dependencies=None, mode='compile'):
-        args = self._get_compiler_check_args(env, extra_args, dependencies, mode)
-        # We only want to compile; not link
-        with self.compile(code, args.to_native(), mode) as p:
-            return p.returncode == 0
-
-    def _links_wrapper(self, code, env, extra_args, dependencies):
-        "Shares common code between self.links and self.run"
-        args = self._get_compiler_check_args(env, extra_args, dependencies, mode='link')
-        return self.compile(code, args)
-
-    def links(self, code, env, extra_args=None, dependencies=None):
-        with self._links_wrapper(code, env, extra_args, dependencies) as p:
-            return p.returncode == 0
-
-    def run(self, code, env, extra_args=None, dependencies=None):
-        if self.is_cross and self.exe_wrapper is None:
-            raise CrossNoRunException('Can not run test applications in this cross environment.')
-        with self._links_wrapper(code, env, extra_args, dependencies) as p:
-            if p.returncode != 0:
-                mlog.debug('Could not compile test file %s: %d\n' % (
-                    p.input_name,
-                    p.returncode))
-                return RunResult(False)
-            if self.is_cross:
-                cmdlist = self.exe_wrapper + [p.output_name]
-            else:
-                cmdlist = p.output_name
-            try:
-                pe, so, se = Popen_safe(cmdlist)
-            except Exception as e:
-                mlog.debug('Could not run: %s (error: %s)\n' % (cmdlist, e))
-                return RunResult(False)
-
-        mlog.debug('Program stdout:\n')
-        mlog.debug(so)
-        mlog.debug('Program stderr:\n')
-        mlog.debug(se)
-        return RunResult(True, pe.returncode, so, se)
-
-    def _compile_int(self, expression, prefix, env, extra_args, dependencies):
-        fargs = {'prefix': prefix, 'expression': expression}
-        t = '''#include <stdio.h>
-        {prefix}
-        int main() {{ static int a[1-2*!({expression})]; a[0]=0; return 0; }}'''
-        return self.compiles(t.format(**fargs), env, extra_args, dependencies)
-
-    def cross_compute_int(self, expression, low, high, guess, prefix, env, extra_args, dependencies):
-        if isinstance(guess, int):
-            if self._compile_int('%s == %d' % (expression, guess), prefix, env, extra_args, dependencies):
-                return guess
-
-        cur = low
-        while low < high:
-            cur = int((low + high) / 2)
-            if cur == low:
-                break
-
-            if self._compile_int('%s >= %d' % (expression, cur), prefix, env, extra_args, dependencies):
-                low = cur
-            else:
-                high = cur
-
-        if self._compile_int('%s == %d' % (expression, cur), prefix, env, extra_args, dependencies):
-            return cur
-        raise EnvironmentException('Cross-compile check overflowed')
-
-    def compute_int(self, expression, low, high, guess, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        if self.is_cross:
-            return self.cross_compute_int(expression, low, high, guess, prefix, env, extra_args, dependencies)
-        fargs = {'prefix': prefix, 'expression': expression}
-        t = '''#include<stdio.h>
-        {prefix}
-        int main(int argc, char **argv) {{
-            printf("%ld\\n", (long)({expression}));
-            return 0;
-        }};'''
-        res = self.run(t.format(**fargs), env, extra_args, dependencies)
-        if not res.compiled:
-            return -1
-        if res.returncode != 0:
-            raise EnvironmentException('Could not run compute_int test binary.')
-        return int(res.stdout)
-
-    def cross_sizeof(self, typename, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        fargs = {'prefix': prefix, 'type': typename}
-        t = '''#include <stdio.h>
-        {prefix}
-        int main(int argc, char **argv) {{
-            {type} something;
-        }}'''
-        if not self.compiles(t.format(**fargs), env, extra_args, dependencies):
-            return -1
-        return self.cross_compute_int('sizeof(%s)' % typename, 1, 128, None, prefix, env, extra_args, dependencies)
-
-    def sizeof(self, typename, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        fargs = {'prefix': prefix, 'type': typename}
-        if self.is_cross:
-            return self.cross_sizeof(typename, prefix, env, extra_args, dependencies)
-        t = '''#include<stdio.h>
-        {prefix}
-        int main(int argc, char **argv) {{
-            printf("%ld\\n", (long)(sizeof({type})));
-            return 0;
-        }};'''
-        res = self.run(t.format(**fargs), env, extra_args, dependencies)
-        if not res.compiled:
-            return -1
-        if res.returncode != 0:
-            raise EnvironmentException('Could not run sizeof test binary.')
-        return int(res.stdout)
-
-    def cross_alignment(self, typename, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        fargs = {'prefix': prefix, 'type': typename}
-        t = '''#include <stdio.h>
-        {prefix}
-        int main(int argc, char **argv) {{
-            {type} something;
-        }}'''
-        if not self.compiles(t.format(**fargs), env, extra_args, dependencies):
-            return -1
-        t = '''#include <stddef.h>
-        {prefix}
-        struct tmp {{
-            char c;
-            {type} target;
-        }};'''
-        return self.cross_compute_int('offsetof(struct tmp, target)', 1, 1024, None, t.format(**fargs), env, extra_args, dependencies)
-
-    def alignment(self, typename, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        if self.is_cross:
-            return self.cross_alignment(typename, prefix, env, extra_args, dependencies)
-        fargs = {'prefix': prefix, 'type': typename}
-        t = '''#include <stdio.h>
-        #include <stddef.h>
-        {prefix}
-        struct tmp {{
-            char c;
-            {type} target;
-        }};
-        int main(int argc, char **argv) {{
-            printf("%d", (int)offsetof(struct tmp, target));
-            return 0;
-        }}'''
-        res = self.run(t.format(**fargs), env, extra_args, dependencies)
-        if not res.compiled:
-            raise EnvironmentException('Could not compile alignment test.')
-        if res.returncode != 0:
-            raise EnvironmentException('Could not run alignment test binary.')
-        align = int(res.stdout)
-        if align == 0:
-            raise EnvironmentException('Could not determine alignment of %s. Sorry. You might want to file a bug.' % typename)
-        return align
-
-    def get_define(self, dname, prefix, env, extra_args, dependencies):
-        delim = '"MESON_GET_DEFINE_DELIMITER"'
-        fargs = {'prefix': prefix, 'define': dname, 'delim': delim}
-        code = '''
-        {prefix}
-        #ifndef {define}
-        # define {define}
-        #endif
-        {delim}\n{define}'''
-        args = self._get_compiler_check_args(env, extra_args, dependencies,
-                                             mode='preprocess').to_native()
-        with self.compile(code.format(**fargs), args, 'preprocess') as p:
-            if p.returncode != 0:
-                raise EnvironmentException('Could not get define {!r}'.format(dname))
-        # Get the preprocessed value after the delimiter,
-        # minus the extra newline at the end
-        return p.stdo.split(delim + '\n')[-1][:-1]
-
-    @staticmethod
-    def _no_prototype_templ():
-        """
-        Try to find the function without a prototype from a header by defining
-        our own dummy prototype and trying to link with the C library (and
-        whatever else the compiler links in by default). This is very similar
-        to the check performed by Autoconf for AC_CHECK_FUNCS.
-        """
-        # Define the symbol to something else since it is defined by the
-        # includes or defines listed by the user or by the compiler. This may
-        # include, for instance _GNU_SOURCE which must be defined before
-        # limits.h, which includes features.h
-        # Then, undef the symbol to get rid of it completely.
-        head = '''
-        #define {func} meson_disable_define_of_{func}
-        {prefix}
-        #include <limits.h>
-        #undef {func}
-        '''
-        # Override any GCC internal prototype and declare our own definition for
-        # the symbol. Use char because that's unlikely to be an actual return
-        # value for a function which ensures that we override the definition.
-        head += '''
-        #ifdef __cplusplus
-        extern "C"
-        #endif
-        char {func} ();
-        '''
-        # The actual function call
-        main = '''
-        int main () {{
-          return {func} ();
-        }}'''
-        return head, main
-
-    @staticmethod
-    def _have_prototype_templ():
-        """
-        Returns a head-er and main() call that uses the headers listed by the
-        user for the function prototype while checking if a function exists.
-        """
-        # Add the 'prefix', aka defines, includes, etc that the user provides
-        # This may include, for instance _GNU_SOURCE which must be defined
-        # before limits.h, which includes features.h
-        head = '{prefix}\n#include <limits.h>\n'
-        # We don't know what the function takes or returns, so return it as an int.
-        # Just taking the address or comparing it to void is not enough because
-        # compilers are smart enough to optimize it away. The resulting binary
-        # is not run so we don't care what the return value is.
-        main = '''\nint main() {{
-            void *a = (void*) &{func};
-            long b = (long) a;
-            return (int) b;
-        }}'''
-        return head, main
-
-    def has_function(self, funcname, prefix, env, extra_args=None, dependencies=None):
-        """
-        First, this function looks for the symbol in the default libraries
-        provided by the compiler (stdlib + a few others usually). If that
-        fails, it checks if any of the headers specified in the prefix provide
-        an implementation of the function, and if that fails, it checks if it's
-        implemented as a compiler-builtin.
-        """
-        if extra_args is None:
-            extra_args = []
-
-        # Short-circuit if the check is already provided by the cross-info file
-        varname = 'has function ' + funcname
-        varname = varname.replace(' ', '_')
-        if self.is_cross:
-            val = env.cross_info.config['properties'].get(varname, None)
-            if val is not None:
-                if isinstance(val, bool):
-                    return val
-                raise EnvironmentException('Cross variable {0} is not a boolean.'.format(varname))
-
-        fargs = {'prefix': prefix, 'func': funcname}
-
-        # glibc defines functions that are not available on Linux as stubs that
-        # fail with ENOSYS (such as e.g. lchmod). In this case we want to fail
-        # instead of detecting the stub as a valid symbol.
-        # We already included limits.h earlier to ensure that these are defined
-        # for stub functions.
-        stubs_fail = '''
-        #if defined __stub_{func} || defined __stub___{func}
-        fail fail fail this function is not going to work
-        #endif
-        '''
-
-        # If we have any includes in the prefix supplied by the user, assume
-        # that the user wants us to use the symbol prototype defined in those
-        # includes. If not, then try to do the Autoconf-style check with
-        # a dummy prototype definition of our own.
-        # This is needed when the linker determines symbol availability from an
-        # SDK based on the prototype in the header provided by the SDK.
-        # Ignoring this prototype would result in the symbol always being
-        # marked as available.
-        if '#include' in prefix:
-            head, main = self._have_prototype_templ()
-        else:
-            head, main = self._no_prototype_templ()
-        templ = head + stubs_fail + main
-
-        if self.links(templ.format(**fargs), env, extra_args, dependencies):
-            return True
-
-        # MSVC does not have compiler __builtin_-s.
-        if self.get_id() == 'msvc':
-            return False
-
-        # Detect function as a built-in
-        #
-        # Some functions like alloca() are defined as compiler built-ins which
-        # are inlined by the compiler and you can't take their address, so we
-        # need to look for them differently. On nice compilers like clang, we
-        # can just directly use the __has_builtin() macro.
-        fargs['no_includes'] = '#include' not in prefix
-        t = '''{prefix}
-        int main() {{
-        #ifdef __has_builtin
-            #if !__has_builtin(__builtin_{func})
-                #error "__builtin_{func} not found"
-            #endif
-        #elif ! defined({func})
-            /* Check for __builtin_{func} only if no includes were added to the
-             * prefix above, which means no definition of {func} can be found.
-             * We would always check for this, but we get false positives on
-             * MSYS2 if we do. Their toolchain is broken, but we can at least
-             * give them a workaround. */
-            #if {no_includes:d}
-                __builtin_{func};
-            #else
-                #error "No definition for __builtin_{func} found in the prefix"
-            #endif
-        #endif
-        }}'''
-        return self.links(t.format(**fargs), env, extra_args, dependencies)
-
-    def has_members(self, typename, membernames, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        fargs = {'prefix': prefix, 'type': typename, 'name': 'foo'}
-        # Create code that accesses all members
-        members = ''
-        for member in membernames:
-            members += '{}.{};\n'.format(fargs['name'], member)
-        fargs['members'] = members
-        t = '''{prefix}
-        void bar() {{
-            {type} {name};
-            {members}
-        }};'''
-        return self.compiles(t.format(**fargs), env, extra_args, dependencies)
-
-    def has_type(self, typename, prefix, env, extra_args, dependencies=None):
-        fargs = {'prefix': prefix, 'type': typename}
-        t = '''{prefix}
-        void bar() {{
-            sizeof({type});
-        }};'''
-        return self.compiles(t.format(**fargs), env, extra_args, dependencies)
-
-    def symbols_have_underscore_prefix(self, env):
-        '''
-        Check if the compiler prefixes an underscore to global C symbols
-        '''
-        symbol_name = b'meson_uscore_prefix'
-        code = '''#ifdef __cplusplus
-        extern "C" {
-        #endif
-        void ''' + symbol_name.decode() + ''' () {}
-        #ifdef __cplusplus
-        }
-        #endif
-        '''
-        args = self.get_cross_extra_flags(env, link=False)
-        args += self.get_compiler_check_args()
-        n = 'symbols_have_underscore_prefix'
-        with self.compile(code, args, 'compile') as p:
-            if p.returncode != 0:
-                m = 'BUG: Unable to compile {!r} check: {}'
-                raise RuntimeError(m.format(n, p.stdo))
-            if not os.path.isfile(p.output_name):
-                m = 'BUG: Can\'t find compiled test code for {!r} check'
-                raise RuntimeError(m.format(n))
-            with open(p.output_name, 'rb') as o:
-                for line in o:
-                    # Check if the underscore form of the symbol is somewhere
-                    # in the output file.
-                    if b'_' + symbol_name in line:
-                        return True
-                    # Else, check if the non-underscored form is present
-                    elif symbol_name in line:
-                        return False
-        raise RuntimeError('BUG: {!r} check failed unexpectedly'.format(n))
-
-    def find_library(self, libname, env, extra_dirs):
-        # First try if we can just add the library as -l.
-        code = '''int main(int argc, char **argv) {
-    return 0;
-}
-        '''
-        if extra_dirs and isinstance(extra_dirs, str):
-            extra_dirs = [extra_dirs]
-        # Gcc + co seem to prefer builtin lib dirs to -L dirs.
-        # Only try to find std libs if no extra dirs specified.
-        if not extra_dirs:
-            args = ['-l' + libname]
-            if self.links(code, env, extra_args=args):
-                return args
-        # Not found? Try to find the library file itself.
-        extra_dirs += self.get_library_dirs()
-        suffixes = ['so', 'dylib', 'lib', 'dll', 'a']
-        for d in extra_dirs:
-            for suffix in suffixes:
-                trial = os.path.join(d, 'lib' + libname + '.' + suffix)
-                if os.path.isfile(trial):
-                    return [trial]
-                trial2 = os.path.join(d, libname + '.' + suffix)
-                if os.path.isfile(trial2):
-                    return [trial2]
-        return None
-
-    def thread_flags(self):
-        return ['-pthread']
-
-    def thread_link_flags(self):
-        return ['-pthread']
-
-    def has_multi_arguments(self, args, env):
-        return self.compiles('int i;\n', env, extra_args=args)
-
-class CPPCompiler(CCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrap):
-        # If a child ObjCPP class has already set it, don't set it ourselves
-        if not hasattr(self, 'language'):
-            self.language = 'cpp'
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-
-    def get_no_stdinc_args(self):
-        return ['-nostdinc++']
-
-    def sanity_check(self, work_dir, environment):
-        code = 'class breakCCompiler;int main(int argc, char **argv) { return 0; }\n'
-        return self.sanity_check_impl(work_dir, environment, 'sanitycheckcpp.cc', code)
-
-    def get_compiler_check_args(self):
-        # -fpermissive allows non-conforming code to compile which is necessary
-        # for many C++ checks. Particularly, the has_header_symbol check is
-        # too strict without this and always fails.
-        return super().get_compiler_check_args() + ['-fpermissive']
-
-    def has_header_symbol(self, hname, symbol, prefix, env, extra_args=None, dependencies=None):
-        # Check if it's a C-like symbol
-        if super().has_header_symbol(hname, symbol, prefix, env, extra_args, dependencies):
-            return True
-        # Check if it's a class or a template
-        if extra_args is None:
-            extra_args = []
-        fargs = {'prefix': prefix, 'header': hname, 'symbol': symbol}
-        t = '''{prefix}
-        #include <{header}>
-        using {symbol};
-        int main () {{ return 0; }}'''
-        return self.compiles(t.format(**fargs), env, extra_args, dependencies)
-
-class ObjCCompiler(CCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrap):
-        self.language = 'objc'
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-
-    def sanity_check(self, work_dir, environment):
-        # TODO try to use sanity_check_impl instead of duplicated code
-        source_name = os.path.join(work_dir, 'sanitycheckobjc.m')
-        binary_name = os.path.join(work_dir, 'sanitycheckobjc')
-        extra_flags = self.get_cross_extra_flags(environment, link=False)
-        if self.is_cross:
-            extra_flags += self.get_compile_only_args()
-        with open(source_name, 'w') as ofile:
-            ofile.write('#import<stdio.h>\n'
-                        'int main(int argc, char **argv) { return 0; }\n')
-        pc = subprocess.Popen(self.exelist + extra_flags + [source_name, '-o', binary_name])
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('ObjC compiler %s can not compile programs.' % self.name_string())
-        if self.is_cross:
-            # Can't check if the binaries run so we have to assume they do
-            return
-        pe = subprocess.Popen(binary_name)
-        pe.wait()
-        if pe.returncode != 0:
-            raise EnvironmentException('Executables created by ObjC compiler %s are not runnable.' % self.name_string())
-
-class ObjCPPCompiler(CPPCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrap):
-        self.language = 'objcpp'
-        CPPCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-
-    def sanity_check(self, work_dir, environment):
-        # TODO try to use sanity_check_impl instead of duplicated code
-        source_name = os.path.join(work_dir, 'sanitycheckobjcpp.mm')
-        binary_name = os.path.join(work_dir, 'sanitycheckobjcpp')
-        extra_flags = self.get_cross_extra_flags(environment, link=False)
-        if self.is_cross:
-            extra_flags += self.get_compile_only_args()
-        with open(source_name, 'w') as ofile:
-            ofile.write('#import<stdio.h>\n'
-                        'class MyClass;'
-                        'int main(int argc, char **argv) { return 0; }\n')
-        pc = subprocess.Popen(self.exelist + extra_flags + [source_name, '-o', binary_name])
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('ObjC++ compiler %s can not compile programs.' % self.name_string())
-        if self.is_cross:
-            # Can't check if the binaries run so we have to assume they do
-            return
-        pe = subprocess.Popen(binary_name)
-        pe.wait()
-        if pe.returncode != 0:
-            raise EnvironmentException('Executables created by ObjC++ compiler %s are not runnable.' % self.name_string())
-
-class MonoCompiler(Compiler):
-    def __init__(self, exelist, version):
-        self.language = 'cs'
-        super().__init__(exelist, version)
-        self.id = 'mono'
-        self.monorunner = 'mono'
-
-    def get_output_args(self, fname):
-        return ['-out:' + fname]
-
-    def get_link_args(self, fname):
-        return ['-r:' + fname]
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return []
-
-    def get_werror_args(self):
-        return ['-warnaserror']
-
-    def split_shlib_to_parts(self, fname):
-        return None, fname
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return []
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return []
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def get_compile_only_args(self):
-        return []
-
-    def get_linker_output_args(self, outputname):
-        return []
-
-    def get_coverage_args(self):
-        return []
-
-    def get_coverage_link_args(self):
-        return []
-
-    def get_std_exe_link_args(self):
-        return []
-
-    def get_include_args(self, path):
-        return []
-
-    def get_pic_args(self):
-        return []
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def get_pch_use_args(self, pch_dir, header):
-        return []
-
-    def get_pch_name(self, header_name):
-        return ''
-
-    def sanity_check(self, work_dir, environment):
-        src = 'sanity.cs'
-        obj = 'sanity.exe'
-        source_name = os.path.join(work_dir, src)
-        with open(source_name, 'w') as ofile:
-            ofile.write('''public class Sanity {
-    static public void Main () {
-    }
-}
-''')
-        pc = subprocess.Popen(self.exelist + [src], cwd=work_dir)
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('Mono compiler %s can not compile programs.' % self.name_string())
-        cmdlist = [self.monorunner, obj]
-        pe = subprocess.Popen(cmdlist, cwd=work_dir)
-        pe.wait()
-        if pe.returncode != 0:
-            raise EnvironmentException('Executables created by Mono compiler %s are not runnable.' % self.name_string())
-
-    def needs_static_linker(self):
-        return False
-
-    def get_buildtype_args(self, buildtype):
-        return mono_buildtype_args[buildtype]
-
-class JavaCompiler(Compiler):
-    def __init__(self, exelist, version):
-        self.language = 'java'
-        super().__init__(exelist, version)
-        self.id = 'unknown'
-        self.javarunner = 'java'
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return []
-
-    def get_werror_args(self):
-        return ['-Werror']
-
-    def split_shlib_to_parts(self, fname):
-        return None, fname
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return []
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return []
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def get_compile_only_args(self):
-        return []
-
-    def get_output_args(self, subdir):
-        if subdir == '':
-            subdir = './'
-        return ['-d', subdir, '-s', subdir]
-
-    def get_linker_output_args(self, outputname):
-        return []
-
-    def get_coverage_args(self):
-        return []
-
-    def get_coverage_link_args(self):
-        return []
-
-    def get_std_exe_link_args(self):
-        return []
-
-    def get_include_args(self, path):
-        return []
-
-    def get_pic_args(self):
-        return []
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def get_pch_use_args(self, pch_dir, header):
-        return []
-
-    def get_pch_name(self, header_name):
-        return ''
-
-    def get_buildtype_args(self, buildtype):
-        return java_buildtype_args[buildtype]
-
-    def sanity_check(self, work_dir, environment):
-        src = 'SanityCheck.java'
-        obj = 'SanityCheck'
-        source_name = os.path.join(work_dir, src)
-        with open(source_name, 'w') as ofile:
-            ofile.write('''class SanityCheck {
-  public static void main(String[] args) {
-    int i;
-  }
-}
-''')
-        pc = subprocess.Popen(self.exelist + [src], cwd=work_dir)
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('Java compiler %s can not compile programs.' % self.name_string())
-        runner = shutil.which(self.javarunner)
-        if runner:
-            cmdlist = [runner, obj]
-            pe = subprocess.Popen(cmdlist, cwd=work_dir)
-            pe.wait()
-            if pe.returncode != 0:
-                raise EnvironmentException('Executables created by Java compiler %s are not runnable.' % self.name_string())
-        else:
-            m = "Java Virtual Machine wasn't found, but it's needed by Meson. " \
-                "Please install a JRE.\nIf you have specific needs where this " \
-                "requirement doesn't make sense, please open a bug at " \
-                "https://github.com/mesonbuild/meson/issues/new and tell us " \
-                "all about it."
-            raise EnvironmentException(m)
-
-    def needs_static_linker(self):
-        return False
-
-class ValaCompiler(Compiler):
-    def __init__(self, exelist, version):
-        self.language = 'vala'
-        super().__init__(exelist, version)
-        self.version = version
-        self.id = 'valac'
-        self.is_cross = False
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def needs_static_linker(self):
-        return False # Because compiles into C.
-
-    def get_output_args(self, target):
-        return ['-o', target]
-
-    def get_compile_only_args(self):
-        return ['-C']
-
-    def get_pic_args(self):
-        return []
-
-    def get_always_args(self):
-        return ['-C']
-
-    def get_warn_args(self, warning_level):
-        return []
-
-    def get_no_warn_args(self):
-        return ['--disable-warnings']
-
-    def get_werror_args(self):
-        return ['--fatal-warnings']
-
-    def sanity_check(self, work_dir, environment):
-        code = 'class MesonSanityCheck : Object { }'
-        args = self.get_cross_extra_flags(environment, link=False)
-        with self.compile(code, args, 'compile') as p:
-            if p.returncode != 0:
-                msg = 'Vala compiler {!r} can not compile programs' \
-                      ''.format(self.name_string())
-                raise EnvironmentException(msg)
-
-    def get_buildtype_args(self, buildtype):
-        if buildtype == 'debug' or buildtype == 'debugoptimized' or buildtype == 'minsize':
-            return ['--debug']
-        return []
-
-    def find_library(self, libname, env, extra_dirs):
-        if extra_dirs and isinstance(extra_dirs, str):
-            extra_dirs = [extra_dirs]
-        # Valac always looks in the default vapi dir, so only search there if
-        # no extra dirs are specified.
-        if not extra_dirs:
-            code = 'class MesonFindLibrary : Object { }'
-            vapi_args = ['--pkg', libname]
-            args = self.get_cross_extra_flags(env, link=False)
-            args += vapi_args
-            with self.compile(code, args, 'compile') as p:
-                if p.returncode == 0:
-                    return vapi_args
-        # Not found? Try to find the vapi file itself.
-        for d in extra_dirs:
-            vapi = os.path.join(d, libname + '.vapi')
-            if os.path.isfile(vapi):
-                return [vapi]
-        mlog.debug('Searched {!r} and {!r} wasn\'t found'.format(extra_dirs, libname))
-        return None
-
-class RustCompiler(Compiler):
-    def __init__(self, exelist, version):
-        self.language = 'rust'
-        super().__init__(exelist, version)
-        self.id = 'rustc'
-
-    def needs_static_linker(self):
-        return False
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def sanity_check(self, work_dir, environment):
-        source_name = os.path.join(work_dir, 'sanity.rs')
-        output_name = os.path.join(work_dir, 'rusttest')
-        with open(source_name, 'w') as ofile:
-            ofile.write('''fn main() {
-}
-''')
-        pc = subprocess.Popen(self.exelist + ['-o', output_name, source_name], cwd=work_dir)
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('Rust compiler %s can not compile programs.' % self.name_string())
-        if subprocess.call(output_name) != 0:
-            raise EnvironmentException('Executables created by Rust compiler %s are not runnable.' % self.name_string())
-
-    def get_dependency_gen_args(self, outfile):
-        return ['--dep-info', outfile]
-
-    def get_buildtype_args(self, buildtype):
-        return rust_buildtype_args[buildtype]
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return self.build_unix_rpath_args(build_dir, from_dir, rpath_paths, install_rpath)
-
-    def get_sysroot(self):
-        cmd = self.exelist + ['--print', 'sysroot']
-        p, stdo, stde = Popen_safe(cmd)
-        return stdo.split('\n')[0]
-
-class SwiftCompiler(Compiler):
-    def __init__(self, exelist, version):
-        self.language = 'swift'
-        super().__init__(exelist, version)
-        self.version = version
-        self.id = 'llvm'
-        self.is_cross = False
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def needs_static_linker(self):
-        return True
-
-    def get_werror_args(self):
-        return ['--fatal-warnings']
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return ['-emit-dependencies']
-
-    def depfile_for_object(self, objfile):
-        return os.path.splitext(objfile)[0] + '.' + self.get_depfile_suffix()
-
-    def get_depfile_suffix(self):
-        return 'd'
-
-    def get_output_args(self, target):
-        return ['-o', target]
-
-    def get_linker_output_args(self, target):
-        return ['-o', target]
-
-    def get_header_import_args(self, headername):
-        return ['-import-objc-header', headername]
-
-    def get_warn_args(self, level):
-        return []
-
-    def get_buildtype_args(self, buildtype):
-        return swift_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        return []
-
-    def get_std_exe_link_args(self):
-        return ['-emit-executable']
-
-    def get_module_args(self, modname):
-        return ['-module-name', modname]
-
-    def get_mod_gen_args(self):
-        return ['-emit-module']
-
-    def build_rpath_args(self, *args):
-        return [] # FIXME
-
-    def get_include_args(self, dirname):
-        return ['-I' + dirname]
-
-    def get_compile_only_args(self):
-        return ['-c']
-
-    def sanity_check(self, work_dir, environment):
-        src = 'swifttest.swift'
-        source_name = os.path.join(work_dir, src)
-        output_name = os.path.join(work_dir, 'swifttest')
-        with open(source_name, 'w') as ofile:
-            ofile.write('''print("Swift compilation is working.")
-''')
-        extra_flags = self.get_cross_extra_flags(environment, link=True)
-        pc = subprocess.Popen(self.exelist + extra_flags + ['-emit-executable', '-o', output_name, src], cwd=work_dir)
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('Swift compiler %s can not compile programs.' % self.name_string())
-        if subprocess.call(output_name) != 0:
-            raise EnvironmentException('Executables created by Swift compiler %s are not runnable.' % self.name_string())
-
-class DCompiler(Compiler):
-    def __init__(self, exelist, version, is_cross):
-        self.language = 'd'
-        super().__init__(exelist, version)
-        self.id = 'unknown'
-        self.is_cross = is_cross
-
-    def sanity_check(self, work_dir, environment):
-        source_name = os.path.join(work_dir, 'sanity.d')
-        output_name = os.path.join(work_dir, 'dtest')
-        with open(source_name, 'w') as ofile:
-            ofile.write('''void main() {
-}
-''')
-        pc = subprocess.Popen(self.exelist + self.get_output_args(output_name) + [source_name], cwd=work_dir)
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('D compiler %s can not compile programs.' % self.name_string())
-        if subprocess.call(output_name) != 0:
-            raise EnvironmentException('Executables created by D compiler %s are not runnable.' % self.name_string())
-
-    def needs_static_linker(self):
-        return True
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def get_preprocess_only_args(self):
-        return ['-E']
-
-    def get_compile_only_args(self):
-        return ['-c']
-
-    def depfile_for_object(self, objfile):
-        return objfile + '.' + self.get_depfile_suffix()
-
-    def get_depfile_suffix(self):
-        return 'dep'
-
-    def get_pic_args(self):
-        return ['-fPIC']
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared']
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        # FIXME: Make this work for Windows, MacOS and cross-compiling
-        return get_gcc_soname_args(GCC_STANDARD, prefix, shlib_name, suffix, path, soversion, is_shared_module)
-
-    def get_unittest_args(self):
-        return ['-unittest']
-
-    def get_buildtype_linker_args(self, buildtype):
-        return []
-
-    def get_std_exe_link_args(self):
-        return []
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        # This method is to be used by LDC and DMD.
-        # GDC can deal with the verbatim flags.
-        if not rpath_paths and not install_rpath:
-            return []
-        paths = ':'.join([os.path.join(build_dir, p) for p in rpath_paths])
-        if len(paths) < len(install_rpath):
-            padding = 'X' * (len(install_rpath) - len(paths))
-            if not paths:
-                paths = padding
-            else:
-                paths = paths + ':' + padding
-        return ['-L-rpath={}'.format(paths)]
-
-    def _get_compiler_check_args(self, env, extra_args, dependencies, mode='compile'):
-        if extra_args is None:
-            extra_args = []
-        elif isinstance(extra_args, str):
-            extra_args = [extra_args]
-        if dependencies is None:
-            dependencies = []
-        elif not isinstance(dependencies, list):
-            dependencies = [dependencies]
-        # Collect compiler arguments
-        args = CompilerArgs(self)
-        for d in dependencies:
-            # Add compile flags needed by dependencies
-            args += d.get_compile_args()
-            if mode == 'link':
-                # Add link flags needed to find dependencies
-                args += d.get_link_args()
-
-        if mode == 'compile':
-            # Add DFLAGS from the env
-            args += env.coredata.external_args[self.language]
-        elif mode == 'link':
-            # Add LDFLAGS from the env
-            args += env.coredata.external_link_args[self.language]
-        # extra_args must override all other arguments, so we add them last
-        args += extra_args
-        return args
-
-    def compiles(self, code, env, extra_args=None, dependencies=None, mode='compile'):
-        args = self._get_compiler_check_args(env, extra_args, dependencies, mode)
-
-        with self.compile(code, args, mode) as p:
-            return p.returncode == 0
-
-    def has_multi_arguments(self, args, env):
-        return self.compiles('int i;\n', env, extra_args=args)
-
-    @classmethod
-    def translate_args_to_nongnu(cls, args):
-        dcargs = []
-        # Translate common arguments to flags the LDC/DMD compilers
-        # can understand.
-        # The flags might have been added by pkg-config files,
-        # and are therefore out of the user's control.
-        for arg in args:
-            if arg == '-pthread':
-                continue
-            if arg.startswith('-Wl,'):
-                linkargs = arg[arg.index(',') + 1:].split(',')
-                for la in linkargs:
-                    dcargs.append('-L' + la.strip())
-                continue
-            elif arg.startswith('-l'):
-                # translate library link flag
-                dcargs.append('-L' + arg)
-                continue
-            elif arg.startswith('-L/') or arg.startswith('-L./'):
-                # we need to handle cases where -L is set by e.g. a pkg-config
-                # setting to select a linker search path. We can however not
-                # unconditionally prefix '-L' with '-L' because the user might
-                # have set this flag too to do what it is intended to for this
-                # compiler (pass flag through to the linker)
-                # Hence, we guess here whether the flag was intended to pass
-                # a linker search path.
-                dcargs.append('-L' + arg)
-                continue
-            dcargs.append(arg)
-
-        return dcargs
-
-class GnuDCompiler(DCompiler):
-    def __init__(self, exelist, version, is_cross):
-        DCompiler.__init__(self, exelist, version, is_cross)
-        self.id = 'gcc'
-        default_warn_args = ['-Wall', '-Wdeprecated']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-        self.base_options = ['b_colorout', 'b_sanitize', 'b_staticpic']
-
-    def get_colorout_args(self, colortype):
-        if mesonlib.version_compare(self.version, '>=4.9.0'):
-            return gnu_color_args[colortype][:]
-        return []
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return ['-fmake-deps=' + outfile]
-
-    def get_output_args(self, target):
-        return ['-o', target]
-
-    def get_linker_output_args(self, target):
-        return ['-o', target]
-
-    def get_include_args(self, path, is_system):
-        return ['-I' + path]
-
-    def get_warn_args(self, level):
-        return self.warn_args[level]
-
-    def get_werror_args(self):
-        return ['-Werror']
-
-    def get_linker_search_args(self, dirname):
-        return ['-L' + dirname]
-
-    def get_buildtype_args(self, buildtype):
-        return d_gdc_buildtype_args[buildtype]
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return self.build_unix_rpath_args(build_dir, from_dir, rpath_paths, install_rpath)
-
-    def get_unittest_args(self):
-        return ['-funittest']
-
-class LLVMDCompiler(DCompiler):
-    def __init__(self, exelist, version, is_cross):
-        DCompiler.__init__(self, exelist, version, is_cross)
-        self.id = 'llvm'
-        self.base_options = ['b_coverage', 'b_colorout']
-
-    def get_colorout_args(self, colortype):
-        if colortype == 'always':
-            return ['-enable-color']
-        return []
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        # LDC using the -deps flag returns a non-Makefile dependency-info file, which
-        # the backends can not use. So we disable this feature for now.
-        return []
-
-    def get_output_args(self, target):
-        return ['-of', target]
-
-    def get_linker_output_args(self, target):
-        return ['-of', target]
-
-    def get_include_args(self, path, is_system):
-        return ['-I' + path]
-
-    def get_warn_args(self, level):
-        if level == '2' or level == '3':
-            return ['-wi', '-dw']
-        else:
-            return ['-wi']
-
-    def get_werror_args(self):
-        return ['-w']
-
-    def get_coverage_args(self):
-        return ['-cov']
-
-    def get_buildtype_args(self, buildtype):
-        return d_ldc_buildtype_args[buildtype]
-
-    def get_pic_args(self):
-        return ['-relocation-model=pic']
-
-    def get_linker_search_args(self, dirname):
-        # -L is recognized as "add this to the search path" by the linker,
-        # while the compiler recognizes it as "pass to linker". So, the first
-        # -L is for the compiler, telling it to pass the second -L to the linker.
-        return ['-L-L' + dirname]
-
-    @classmethod
-    def unix_args_to_native(cls, args):
-        return cls.translate_args_to_nongnu(args)
-
-class DmdDCompiler(DCompiler):
-    def __init__(self, exelist, version, is_cross):
-        DCompiler.__init__(self, exelist, version, is_cross)
-        self.id = 'dmd'
-        self.base_options = ['b_coverage', 'b_colorout']
-
-    def get_colorout_args(self, colortype):
-        if colortype == 'always':
-            return ['-color=on']
-        return []
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        # LDC using the -deps flag returns a non-Makefile dependency-info file, which
-        # the backends can not use. So we disable this feature for now.
-        return []
-
-    def get_output_args(self, target):
-        return ['-of' + target]
-
-    def get_werror_args(self):
-        return ['-w']
-
-    def get_linker_output_args(self, target):
-        return ['-of' + target]
-
-    def get_include_args(self, path, is_system):
-        return ['-I' + path]
-
-    def get_warn_args(self, level):
-        return ['-wi']
-
-    def get_coverage_args(self):
-        return ['-cov']
-
-    def get_linker_search_args(self, dirname):
-        # -L is recognized as "add this to the search path" by the linker,
-        # while the compiler recognizes it as "pass to linker". So, the first
-        # -L is for the compiler, telling it to pass the second -L to the linker.
-        return ['-L-L' + dirname]
-
-    def get_buildtype_args(self, buildtype):
-        return d_dmd_buildtype_args[buildtype]
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared', '-defaultlib=libphobos2.so']
-
-    @classmethod
-    def unix_args_to_native(cls, args):
-        return cls.translate_args_to_nongnu(args)
-
-class VisualStudioCCompiler(CCompiler):
-    std_warn_args = ['/W3']
-    std_opt_args = ['/O2']
-
-    def __init__(self, exelist, version, is_cross, exe_wrap):
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-        self.id = 'msvc'
-        # /showIncludes is needed for build dependency tracking in Ninja
-        # See: https://ninja-build.org/manual.html#_deps
-        self.always_args = ['/nologo', '/showIncludes']
-        self.warn_args = {'1': ['/W2'],
-                          '2': ['/W3'],
-                          '3': ['/W4']}
-        self.base_options = ['b_pch'] # FIXME add lto, pgo and the like
-
-    # Override CCompiler.get_always_args
-    def get_always_args(self):
-        return self.always_args
-
-    def get_linker_debug_crt_args(self):
-        """
-        Arguments needed to select a debug crt for the linker
-
-        Sometimes we need to manually select the CRT (C runtime) to use with
-        MSVC. One example is when trying to link with static libraries since
-        MSVC won't auto-select a CRT for us in that case and will error out
-        asking us to select one.
-        """
-        return ['/MDd']
-
-    def get_buildtype_args(self, buildtype):
-        return msvc_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        return msvc_buildtype_linker_args[buildtype]
-
-    def get_pch_suffix(self):
-        return 'pch'
-
-    def get_pch_name(self, header):
-        chopped = os.path.split(header)[-1].split('.')[:-1]
-        chopped.append(self.get_pch_suffix())
-        pchname = '.'.join(chopped)
-        return pchname
-
-    def get_pch_use_args(self, pch_dir, header):
-        base = os.path.split(header)[-1]
-        pchname = self.get_pch_name(header)
-        return ['/FI' + base, '/Yu' + base, '/Fp' + os.path.join(pch_dir, pchname)]
-
-    def get_preprocess_only_args(self):
-        return ['/EP']
-
-    def get_compile_only_args(self):
-        return ['/c']
-
-    def get_no_optimization_args(self):
-        return ['/Od']
-
-    def get_output_args(self, target):
-        if target.endswith('.exe'):
-            return ['/Fe' + target]
-        return ['/Fo' + target]
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return []
-
-    def get_linker_exelist(self):
-        return ['link'] # FIXME, should have same path as compiler.
-
-    def get_linker_always_args(self):
-        return ['/nologo']
-
-    def get_linker_output_args(self, outputname):
-        return ['/OUT:' + outputname]
-
-    def get_linker_search_args(self, dirname):
-        return ['/LIBPATH:' + dirname]
-
-    def get_pic_args(self):
-        return [] # PIC is handled by the loader on Windows
-
-    def get_std_shared_lib_link_args(self):
-        return ['/DLL']
-
-    def gen_vs_module_defs_args(self, defsfile):
-        if not isinstance(defsfile, str):
-            raise RuntimeError('Module definitions file should be str')
-        # With MSVC, DLLs only export symbols that are explicitly exported,
-        # so if a module defs file is specified, we use that to export symbols
-        return ['/DEF:' + defsfile]
-
-    def gen_pch_args(self, header, source, pchname):
-        objname = os.path.splitext(pchname)[0] + '.obj'
-        return objname, ['/Yc' + header, '/Fp' + pchname, '/Fo' + objname]
-
-    def gen_import_library_args(self, implibname):
-        "The name of the outputted import library"
-        return ['/IMPLIB:' + implibname]
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return []
-
-    # FIXME, no idea what these should be.
-    def thread_flags(self):
-        return []
-
-    def thread_link_flags(self):
-        return []
-
-    def get_options(self):
-        return {'c_winlibs': coredata.UserStringArrayOption('c_winlibs',
-                                                            'Windows libs to link against.',
-                                                            msvc_winlibs)
-                }
-
-    def get_option_link_args(self, options):
-        return options['c_winlibs'].value[:]
-
-    @classmethod
-    def unix_args_to_native(cls, args):
-        result = []
-        for i in args:
-            # -mms-bitfields is specific to MinGW-GCC
-            # -pthread is only valid for GCC
-            if i in ('-mms-bitfields', '-pthread'):
-                continue
-            if i.startswith('-L'):
-                i = '/LIBPATH:' + i[2:]
-            # Translate GNU-style -lfoo library name to the import library
-            elif i.startswith('-l'):
-                name = i[2:]
-                if name in ('m', 'c', 'pthread'):
-                    # With MSVC, these are provided by the C runtime which is
-                    # linked in by default
-                    continue
-                else:
-                    i = name + '.lib'
-            # -pthread in link flags is only used on Linux
-            elif i == '-pthread':
-                continue
-            result.append(i)
-        return result
-
-    def get_werror_args(self):
-        return ['/WX']
-
-    def get_include_args(self, path, is_system):
-        if path == '':
-            path = '.'
-        # msvc does not have a concept of system header dirs.
-        return ['-I' + path]
-
-    # Visual Studio is special. It ignores some arguments it does not
-    # understand and you can't tell it to error out on those.
-    # http://stackoverflow.com/questions/15259720/how-can-i-make-the-microsoft-c-compiler-treat-unknown-flags-as-errors-rather-t
-    def has_multi_arguments(self, args, env):
-        warning_text = '9002'
-        code = 'int i;\n'
-        (fd, srcname) = tempfile.mkstemp(suffix='.' + self.default_suffix)
-        os.close(fd)
-        with open(srcname, 'w') as ofile:
-            ofile.write(code)
-        # Read c_args/cpp_args/etc from the cross-info file (if needed)
-        extra_args = self.get_cross_extra_flags(env, link=False)
-        extra_args += self.get_compile_only_args()
-        commands = self.exelist + args + extra_args + [srcname]
-        mlog.debug('Running VS compile:')
-        mlog.debug('Command line: ', ' '.join(commands))
-        mlog.debug('Code:\n', code)
-        p, stdo, stde = Popen_safe(commands, cwd=os.path.split(srcname)[0])
-        if p.returncode != 0:
-            return False
-        return not(warning_text in stde or warning_text in stdo)
-
-    def get_compile_debugfile_args(self, rel_obj, pch=False):
-        pdbarr = rel_obj.split('.')[:-1]
-        pdbarr += ['pdb']
-        args = ['/Fd' + '.'.join(pdbarr)]
-        # When generating a PDB file with PCH, all compile commands write
-        # to the same PDB file. Hence, we need to serialize the PDB
-        # writes using /FS since we do parallel builds. This slows down the
-        # build obviously, which is why we only do this when PCH is on.
-        # This was added in Visual Studio 2013 (MSVC 18.0). Before that it was
-        # always on: https://msdn.microsoft.com/en-us/library/dn502518.aspx
-        if pch and mesonlib.version_compare(self.version, '>=18.0'):
-            args = ['/FS'] + args
-        return args
-
-    def get_link_debugfile_args(self, targetfile):
-        pdbarr = targetfile.split('.')[:-1]
-        pdbarr += ['pdb']
-        return ['/DEBUG', '/PDB:' + '.'.join(pdbarr)]
-
-    def get_link_whole_for(self, args):
-        # Only since VS2015
-        if not isinstance(args, list):
-            args = [args]
-        return ['/WHOLEARCHIVE:' + x for x in args]
-
-
-class VisualStudioCPPCompiler(VisualStudioCCompiler, CPPCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrap):
-        self.language = 'cpp'
-        CPPCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-        VisualStudioCCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-        self.base_options = ['b_pch'] # FIXME add lto, pgo and the like
-
-    def get_options(self):
-        return {'cpp_eh': coredata.UserComboOption('cpp_eh',
-                                                   'C++ exception handling type.',
-                                                   ['none', 'a', 's', 'sc'],
-                                                   'sc'),
-                'cpp_winlibs': coredata.UserStringArrayOption('cpp_winlibs',
-                                                              'Windows libs to link against.',
-                                                              msvc_winlibs)
-                }
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['cpp_eh']
-        if std.value != 'none':
-            args.append('/EH' + std.value)
-        return args
-
-    def get_option_link_args(self, options):
-        return options['cpp_winlibs'].value[:]
-
-    def get_compiler_check_args(self):
-        # Visual Studio C++ compiler doesn't support -fpermissive,
-        # so just use the plain C args.
-        return super(VisualStudioCCompiler, self).get_compiler_check_args()
-
-GCC_STANDARD = 0
-GCC_OSX = 1
-GCC_MINGW = 2
-GCC_CYGWIN = 3
-
-CLANG_STANDARD = 0
-CLANG_OSX = 1
-CLANG_WIN = 2
-# Possibly clang-cl?
-
-ICC_STANDARD = 0
-ICC_OSX = 1
-ICC_WIN = 2
-
-def get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-    if soversion is None:
-        sostr = ''
-    else:
-        sostr = '.' + soversion
-    if gcc_type in (GCC_STANDARD, GCC_MINGW, GCC_CYGWIN):
-        # Might not be correct for mingw but seems to work.
-        return ['-Wl,-soname,%s%s.%s%s' % (prefix, shlib_name, suffix, sostr)]
-    elif gcc_type == GCC_OSX:
-        if is_shared_module:
-            return []
-        return ['-install_name', os.path.join(path, 'lib' + shlib_name + '.dylib')]
-    else:
-        raise RuntimeError('Not implemented yet.')
-
-def get_compiler_is_linuxlike(compiler):
-    if (getattr(compiler, 'gcc_type', None) == GCC_STANDARD) or \
-       (getattr(compiler, 'clang_type', None) == CLANG_STANDARD) or \
-       (getattr(compiler, 'icc_type', None) == ICC_STANDARD):
-        return True
-    return False
-
-def get_compiler_uses_gnuld(c):
-    # FIXME: Perhaps we should detect the linker in the environment?
-    # FIXME: Assumes that *BSD use GNU ld, but they might start using lld soon
-    if (getattr(c, 'gcc_type', None) in (GCC_STANDARD, GCC_MINGW, GCC_CYGWIN)) or \
-       (getattr(c, 'clang_type', None) in (CLANG_STANDARD, CLANG_WIN)) or \
-       (getattr(c, 'icc_type', None) in (ICC_STANDARD, ICC_WIN)):
-        return True
-    return False
-
-def get_largefile_args(compiler):
-    '''
-    Enable transparent large-file-support for 32-bit UNIX systems
-    '''
-    if get_compiler_is_linuxlike(compiler):
-        # Enable large-file support unconditionally on all platforms other
-        # than macOS and Windows. macOS is now 64-bit-only so it doesn't
-        # need anything special, and Windows doesn't have automatic LFS.
-        # You must use the 64-bit counterparts explicitly.
-        # glibc, musl, and uclibc, and all BSD libcs support this. On Android,
-        # support for transparent LFS is available depending on the version of
-        # Bionic: https://github.com/android/platform_bionic#32-bit-abi-bugs
-        # https://code.google.com/p/android/issues/detail?id=64613
-        #
-        # If this breaks your code, fix it! It's been 20+ years!
-        return ['-D_FILE_OFFSET_BITS=64']
-        # We don't enable -D_LARGEFILE64_SOURCE since that enables
-        # transitionary features and must be enabled by programs that use
-        # those features explicitly.
-    return []
-
-
-class GnuCompiler:
-    # Functionality that is common to all GNU family compilers.
-    def __init__(self, gcc_type, defines):
-        self.id = 'gcc'
-        self.gcc_type = gcc_type
-        self.defines = defines or {}
-        self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage',
-                             'b_colorout', 'b_ndebug', 'b_staticpic']
-        if self.gcc_type != GCC_OSX:
-            self.base_options.append('b_lundef')
-            self.base_options.append('b_asneeded')
-        # All GCC backends can do assembly
-        self.can_compile_suffixes.add('s')
-
-    def get_colorout_args(self, colortype):
-        if mesonlib.version_compare(self.version, '>=4.9.0'):
-            return gnu_color_args[colortype][:]
-        return []
-
-    def get_warn_args(self, level):
-        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):
-        return define in self.defines
-
-    def get_builtin_define(self, define):
-        if define in self.defines:
-            return self.defines[define]
-
-    def get_pic_args(self):
-        if self.gcc_type in (GCC_CYGWIN, GCC_MINGW, GCC_OSX):
-            return [] # On Window and OS X, pic is always on.
-        return ['-fPIC']
-
-    def get_buildtype_args(self, buildtype):
-        return gnulike_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        if self.gcc_type == GCC_OSX:
-            return apple_buildtype_linker_args[buildtype]
-        return gnulike_buildtype_linker_args[buildtype]
-
-    def get_pch_suffix(self):
-        return 'gch'
-
-    def split_shlib_to_parts(self, fname):
-        return os.path.split(fname)[0], fname
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
-
-    def get_std_shared_lib_link_args(self):
-        if self.gcc_type == GCC_OSX:
-            return ['-bundle']
-        return ['-shared']
-
-    def get_link_whole_for(self, args):
-        return ['-Wl,--whole-archive'] + args + ['-Wl,--no-whole-archive']
-
-    def gen_vs_module_defs_args(self, defsfile):
-        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.gcc_type in (GCC_CYGWIN, GCC_MINGW):
-            return [defsfile]
-        # For other targets, discard the .def file.
-        return []
-
-    def get_gui_app_args(self):
-        if self.gcc_type in (GCC_CYGWIN, GCC_MINGW):
-            return ['-mwindows']
-        return []
-
-class GnuCCompiler(GnuCompiler, CCompiler):
-    def __init__(self, exelist, version, gcc_type, is_cross, exe_wrapper=None, defines=None):
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        GnuCompiler.__init__(self, gcc_type, defines)
-        default_warn_args = ['-Wall', '-Winvalid-pch']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        opts = {'c_std': coredata.UserComboOption('c_std', 'C language standard to use',
-                                                  ['none', 'c89', 'c99', 'c11',
-                                                   'gnu89', 'gnu99', 'gnu11'],
-                                                  'none')}
-        if self.gcc_type == GCC_MINGW:
-            opts.update({
-                'c_winlibs': coredata.UserStringArrayOption('c_winlibs', 'Standard Win libraries to link against',
-                                                            gnu_winlibs), })
-        return opts
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['c_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        return args
-
-    def get_option_link_args(self, options):
-        if self.gcc_type == GCC_MINGW:
-            return options['c_winlibs'].value[:]
-        return []
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared']
-
-
-class GnuCPPCompiler(GnuCompiler, CPPCompiler):
-
-    def __init__(self, exelist, version, gcc_type, is_cross, exe_wrap, defines):
-        CPPCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-        GnuCompiler.__init__(self, gcc_type, defines)
-        default_warn_args = ['-Wall', '-Winvalid-pch', '-Wnon-virtual-dtor']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        opts = {'cpp_std': coredata.UserComboOption('cpp_std', 'C++ language standard to use',
-                                                    ['none', 'c++03', 'c++11', 'c++14', 'c++1z',
-                                                     'gnu++03', 'gnu++11', 'gnu++14', 'gnu++1z'],
-                                                    'none'),
-                'cpp_debugstl': coredata.UserBooleanOption('cpp_debugstl',
-                                                           'STL debug mode',
-                                                           False)}
-        if self.gcc_type == GCC_MINGW:
-            opts.update({
-                'cpp_winlibs': coredata.UserStringArrayOption('cpp_winlibs', 'Standard Win libraries to link against',
-                                                              gnu_winlibs), })
-        return opts
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['cpp_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        if options['cpp_debugstl'].value:
-            args.append('-D_GLIBCXX_DEBUG=1')
-        return args
-
-    def get_option_link_args(self, options):
-        if self.gcc_type == GCC_MINGW:
-            return options['cpp_winlibs'].value[:]
-        return []
-
-
-class GnuObjCCompiler(GnuCompiler, ObjCCompiler):
-
-    def __init__(self, exelist, version, gcc_type, is_cross, exe_wrapper=None, defines=None):
-        ObjCCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        GnuCompiler.__init__(self, gcc_type, defines)
-        default_warn_args = ['-Wall', '-Winvalid-pch']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-class GnuObjCPPCompiler(GnuCompiler, ObjCPPCompiler):
-
-    def __init__(self, exelist, version, gcc_type, is_cross, exe_wrapper=None, defines=None):
-        ObjCPPCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        GnuCompiler.__init__(self, gcc_type, defines)
-        default_warn_args = ['-Wall', '-Winvalid-pch', '-Wnon-virtual-dtor']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-
-class ClangCompiler:
-    def __init__(self, clang_type):
-        self.id = 'clang'
-        self.clang_type = clang_type
-        self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage',
-                             'b_ndebug', 'b_staticpic', 'b_colorout']
-        if self.clang_type != CLANG_OSX:
-            self.base_options.append('b_lundef')
-            self.base_options.append('b_asneeded')
-        # All Clang backends can do assembly and LLVM IR
-        self.can_compile_suffixes.update(['ll', 's'])
-
-    def get_pic_args(self):
-        if self.clang_type in (CLANG_WIN, CLANG_OSX):
-            return [] # On Window and OS X, pic is always on.
-        return ['-fPIC']
-
-    def get_colorout_args(self, colortype):
-        return clang_color_args[colortype][:]
-
-    def get_buildtype_args(self, buildtype):
-        return gnulike_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        if self.clang_type == CLANG_OSX:
-            return apple_buildtype_linker_args[buildtype]
-        return gnulike_buildtype_linker_args[buildtype]
-
-    def get_pch_suffix(self):
-        return 'pch'
-
-    def get_pch_use_args(self, pch_dir, header):
-        # Workaround for Clang bug http://llvm.org/bugs/show_bug.cgi?id=15136
-        # This flag is internal to Clang (or at least not documented on the man page)
-        # so it might change semantics at any time.
-        return ['-include-pch', os.path.join(pch_dir, self.get_pch_name(header))]
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        if self.clang_type == CLANG_STANDARD:
-            gcc_type = GCC_STANDARD
-        elif self.clang_type == CLANG_OSX:
-            gcc_type = GCC_OSX
-        elif self.clang_type == CLANG_WIN:
-            gcc_type = GCC_MINGW
-        else:
-            raise MesonException('Unreachable code when converting clang type to gcc type.')
-        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
-
-    def has_multi_arguments(self, args, env):
-        return super().has_multi_arguments(
-            ['-Werror=unknown-warning-option'] + args,
-            env)
-
-    def has_function(self, funcname, prefix, env, extra_args=None, dependencies=None):
-        if extra_args is None:
-            extra_args = []
-        # Starting with XCode 8, we need to pass this to force linker
-        # visibility to obey OS X and iOS minimum version targets with
-        # -mmacosx-version-min, -miphoneos-version-min, etc.
-        # https://github.com/Homebrew/homebrew-core/issues/3727
-        if self.clang_type == CLANG_OSX and version_compare(self.version, '>=8.0'):
-            extra_args.append('-Wl,-no_weak_imports')
-        return super().has_function(funcname, prefix, env, extra_args, dependencies)
-
-    def get_std_shared_module_link_args(self):
-        if self.clang_type == CLANG_OSX:
-            return ['-bundle', '-Wl,-undefined,dynamic_lookup']
-        return ['-shared']
-
-    def get_link_whole_for(self, args):
-        if self.clang_type == CLANG_OSX:
-            result = []
-            for a in args:
-                result += ['-Wl,-force_load', a]
-            return result
-        return ['-Wl,--whole-archive'] + args + ['-Wl,--no-whole-archive']
-
-
-class ClangCCompiler(ClangCompiler, CCompiler):
-    def __init__(self, exelist, version, clang_type, is_cross, exe_wrapper=None):
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        ClangCompiler.__init__(self, clang_type)
-        default_warn_args = ['-Wall', '-Winvalid-pch']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        return {'c_std': coredata.UserComboOption('c_std', 'C language standard to use',
-                                                  ['none', 'c89', 'c99', 'c11',
-                                                   'gnu89', 'gnu99', 'gnu11'],
-                                                  'none')}
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['c_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        return args
-
-    def get_option_link_args(self, options):
-        return []
-
-
-class ClangCPPCompiler(ClangCompiler, CPPCompiler):
-    def __init__(self, exelist, version, cltype, is_cross, exe_wrapper=None):
-        CPPCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        ClangCompiler.__init__(self, cltype)
-        default_warn_args = ['-Wall', '-Winvalid-pch', '-Wnon-virtual-dtor']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        return {'cpp_std': coredata.UserComboOption('cpp_std', 'C++ language standard to use',
-                                                    ['none', 'c++03', 'c++11', 'c++14', 'c++1z',
-                                                     'gnu++11', 'gnu++14', 'gnu++1z'],
-                                                    'none')}
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['cpp_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        return args
-
-    def get_option_link_args(self, options):
-        return []
-
-class ClangObjCCompiler(ClangCompiler, GnuObjCCompiler):
-    def __init__(self, exelist, version, cltype, is_cross, exe_wrapper=None):
-        GnuObjCCompiler.__init__(self, exelist, version, cltype, is_cross, exe_wrapper)
-        ClangCompiler.__init__(self, cltype)
-        self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage']
-
-class ClangObjCPPCompiler(ClangCompiler, GnuObjCPPCompiler):
-    def __init__(self, exelist, version, cltype, is_cross, exe_wrapper=None):
-        GnuObjCPPCompiler.__init__(self, exelist, version, cltype, is_cross, exe_wrapper)
-        ClangCompiler.__init__(self, cltype)
-        self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage']
-
-
-# Tested on linux for ICC 14.0.3, 15.0.6, 16.0.4, 17.0.1
-class IntelCompiler:
-    def __init__(self, icc_type):
-        self.id = 'intel'
-        self.icc_type = icc_type
-        self.lang_header = 'none'
-        self.base_options = ['b_pch', 'b_lto', 'b_pgo', 'b_sanitize', 'b_coverage',
-                             'b_colorout', 'b_ndebug', 'b_staticpic', 'b_lundef', 'b_asneeded']
-        # Assembly
-        self.can_compile_suffixes.add('s')
-
-    def get_pic_args(self):
-        return ['-fPIC']
-
-    def get_buildtype_args(self, buildtype):
-        return gnulike_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        return gnulike_buildtype_linker_args[buildtype]
-
-    def get_pch_suffix(self):
-        return 'pchi'
-
-    def get_pch_use_args(self, pch_dir, header):
-        return ['-pch', '-pch_dir', os.path.join(pch_dir), '-x',
-                self.lang_header, '-include', header, '-x', 'none']
-
-    def get_pch_name(self, header_name):
-        return os.path.split(header_name)[-1] + '.' + self.get_pch_suffix()
-
-    def split_shlib_to_parts(self, fname):
-        return os.path.split(fname)[0], fname
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        if self.icc_type == ICC_STANDARD:
-            gcc_type = GCC_STANDARD
-        elif self.icc_type == ICC_OSX:
-            gcc_type = GCC_OSX
-        elif self.icc_type == ICC_WIN:
-            gcc_type = GCC_MINGW
-        else:
-            raise MesonException('Unreachable code when converting icc type to gcc type.')
-        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
-
-    def get_std_shared_lib_link_args(self):
-        # FIXME: Don't know how icc works on OSX
-        # if self.icc_type == ICC_OSX:
-        #     return ['-bundle']
-        return ['-shared']
-
-
-class IntelCCompiler(IntelCompiler, CCompiler):
-    def __init__(self, exelist, version, icc_type, is_cross, exe_wrapper=None):
-        CCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        IntelCompiler.__init__(self, icc_type)
-        self.lang_header = 'c-header'
-        default_warn_args = ['-Wall', '-w3', '-diag-disable:remark', '-Wpch-messages']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        c_stds = ['c89', 'c99']
-        g_stds = ['gnu89', 'gnu99']
-        if mesonlib.version_compare(self.version, '>=16.0.0'):
-            c_stds += ['c11']
-        opts = {'c_std': coredata.UserComboOption('c_std', 'C language standard to use',
-                                                  ['none'] + c_stds + g_stds,
-                                                  'none')}
-        return opts
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['c_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        return args
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared']
-
-    def has_multi_arguments(self, args, env):
-        return super().has_multi_arguments(args + ['-diag-error', '10006'], env)
-
-
-class IntelCPPCompiler(IntelCompiler, CPPCompiler):
-    def __init__(self, exelist, version, icc_type, is_cross, exe_wrap):
-        CPPCompiler.__init__(self, exelist, version, is_cross, exe_wrap)
-        IntelCompiler.__init__(self, icc_type)
-        self.lang_header = 'c++-header'
-        default_warn_args = ['-Wall', '-w3', '-diag-disable:remark',
-                             '-Wpch-messages', '-Wnon-virtual-dtor']
-        self.warn_args = {'1': default_warn_args,
-                          '2': default_warn_args + ['-Wextra'],
-                          '3': default_warn_args + ['-Wextra', '-Wpedantic']}
-
-    def get_options(self):
-        c_stds = []
-        g_stds = ['gnu++98']
-        if mesonlib.version_compare(self.version, '>=15.0.0'):
-            c_stds += ['c++11', 'c++14']
-            g_stds += ['gnu++11']
-        if mesonlib.version_compare(self.version, '>=16.0.0'):
-            c_stds += ['c++17']
-        if mesonlib.version_compare(self.version, '>=17.0.0'):
-            g_stds += ['gnu++14']
-        opts = {'cpp_std': coredata.UserComboOption('cpp_std', 'C++ language standard to use',
-                                                    ['none'] + c_stds + g_stds,
-                                                    'none'),
-                'cpp_debugstl': coredata.UserBooleanOption('cpp_debugstl',
-                                                           'STL debug mode',
-                                                           False)}
-        return opts
-
-    def get_option_compile_args(self, options):
-        args = []
-        std = options['cpp_std']
-        if std.value != 'none':
-            args.append('-std=' + std.value)
-        if options['cpp_debugstl'].value:
-            args.append('-D_GLIBCXX_DEBUG=1')
-        return args
-
-    def get_option_link_args(self, options):
-        return []
-
-    def has_multi_arguments(self, args, env):
-        return super().has_multi_arguments(args + ['-diag-error', '10006'], env)
-
-
-class FortranCompiler(Compiler):
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        self.language = 'fortran'
-        super().__init__(exelist, version)
-        self.is_cross = is_cross
-        self.exe_wrapper = exe_wrapper
-        # Not really correct but I don't have Fortran compilers to test with. Sorry.
-        self.gcc_type = GCC_STANDARD
-        self.id = "IMPLEMENTATION CLASSES MUST SET THIS"
-
-    def name_string(self):
-        return ' '.join(self.exelist)
-
-    def get_pic_args(self):
-        if self.gcc_type in (GCC_CYGWIN, GCC_MINGW, GCC_OSX):
-            return [] # On Window and OS X, pic is always on.
-        return ['-fPIC']
-
-    def get_std_shared_lib_link_args(self):
-        return ['-shared']
-
-    def needs_static_linker(self):
-        return True
-
-    def sanity_check(self, work_dir, environment):
-        source_name = os.path.join(work_dir, 'sanitycheckf.f90')
-        binary_name = os.path.join(work_dir, 'sanitycheckf')
-        with open(source_name, 'w') as ofile:
-            ofile.write('''program prog
-     print *, "Fortran compilation is working."
-end program prog
-''')
-        extra_flags = self.get_cross_extra_flags(environment, link=True)
-        pc = subprocess.Popen(self.exelist + extra_flags + [source_name, '-o', binary_name])
-        pc.wait()
-        if pc.returncode != 0:
-            raise EnvironmentException('Compiler %s can not compile programs.' % self.name_string())
-        if self.is_cross:
-            if self.exe_wrapper is None:
-                # Can't check if the binaries run so we have to assume they do
-                return
-            cmdlist = self.exe_wrapper + [binary_name]
-        else:
-            cmdlist = [binary_name]
-        pe = subprocess.Popen(cmdlist, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
-        pe.wait()
-        if pe.returncode != 0:
-            raise EnvironmentException('Executables created by Fortran compiler %s are not runnable.' % self.name_string())
-
-    def get_std_warn_args(self, level):
-        return FortranCompiler.std_warn_args
-
-    def get_buildtype_args(self, buildtype):
-        return gnulike_buildtype_args[buildtype]
-
-    def get_buildtype_linker_args(self, buildtype):
-        if mesonlib.is_osx():
-            return apple_buildtype_linker_args[buildtype]
-        return gnulike_buildtype_linker_args[buildtype]
-
-    def split_shlib_to_parts(self, fname):
-        return os.path.split(fname)[0], fname
-
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        # Disabled until this is fixed:
-        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62162
-        # return ['-cpp', '-MMD', '-MQ', outtarget]
-        return []
-
-    def get_output_args(self, target):
-        return ['-o', target]
-
-    def get_preprocess_only_args(self):
-        return ['-E']
-
-    def get_compile_only_args(self):
-        return ['-c']
-
-    def get_linker_exelist(self):
-        return self.exelist[:]
-
-    def get_linker_output_args(self, outputname):
-        return ['-o', outputname]
-
-    def get_include_args(self, path, is_system):
-        return ['-I' + path]
-
-    def get_module_outdir_args(self, path):
-        return ['-J' + path]
-
-    def depfile_for_object(self, objfile):
-        return objfile + '.' + self.get_depfile_suffix()
-
-    def get_depfile_suffix(self):
-        return 'd'
-
-    def get_std_exe_link_args(self):
-        return []
-
-    def build_rpath_args(self, build_dir, from_dir, rpath_paths, install_rpath):
-        return self.build_unix_rpath_args(build_dir, from_dir, rpath_paths, install_rpath)
-
-    def module_name_to_filename(self, module_name):
-        return module_name.lower() + '.mod'
-
-    def get_warn_args(self, level):
-        return ['-Wall']
-
-    def get_no_warn_args(self):
-        return ['-w']
-
-
-class GnuFortranCompiler(FortranCompiler):
-    def __init__(self, exelist, version, gcc_type, is_cross, exe_wrapper=None, defines=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.gcc_type = gcc_type
-        self.defines = defines or {}
-        self.id = 'gcc'
-
-    def has_builtin_define(self, define):
-        return define in self.defines
-
-    def get_builtin_define(self, define):
-        if define in self.defines:
-            return self.defines[define]
-
-    def get_always_args(self):
-        return ['-pipe']
-
-    def gen_import_library_args(self, implibname):
-        """
-        The name of the outputted import library
-
-        Used only on Windows
-        """
-        return ['-Wl,--out-implib=' + implibname]
-
-class G95FortranCompiler(FortranCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'g95'
-
-    def get_module_outdir_args(self, path):
-        return ['-fmod=' + path]
-
-    def get_always_args(self):
-        return ['-pipe']
-
-    def get_no_warn_args(self):
-        # FIXME: Confirm that there's no compiler option to disable all warnings
-        return []
-
-    def gen_import_library_args(self, implibname):
-        """
-        The name of the outputted import library
-
-        Used only on Windows
-        """
-        return ['-Wl,--out-implib=' + implibname]
-
-class SunFortranCompiler(FortranCompiler):
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'sun'
-
-    def get_dependency_gen_args(self, outtarget, outfile):
-        return ['-fpp']
-
-    def get_always_args(self):
-        return []
-
-    def get_warn_args(self, level):
-        return []
-
-    def get_module_outdir_args(self, path):
-        return ['-moddir=' + path]
-
-class IntelFortranCompiler(IntelCompiler, FortranCompiler):
-    std_warn_args = ['-warn', 'all']
-
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        self.file_suffixes = ('f90', 'f', 'for', 'ftn', 'fpp')
-        FortranCompiler.__init__(self, exelist, version, is_cross, exe_wrapper)
-        # FIXME: Add support for OS X and Windows in detect_fortran_compiler so
-        # we are sent the type of compiler
-        IntelCompiler.__init__(self, ICC_STANDARD)
-        self.id = 'intel'
-
-    def get_module_outdir_args(self, path):
-        return ['-module', path]
-
-    def get_warn_args(self, level):
-        return IntelFortranCompiler.std_warn_args
-
-class PathScaleFortranCompiler(FortranCompiler):
-    std_warn_args = ['-fullwarn']
-
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'pathscale'
-
-    def get_module_outdir_args(self, path):
-        return ['-module', path]
-
-    def get_std_warn_args(self, level):
-        return PathScaleFortranCompiler.std_warn_args
-
-class PGIFortranCompiler(FortranCompiler):
-    std_warn_args = ['-Minform=inform']
-
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'pgi'
-
-    def get_module_outdir_args(self, path):
-        return ['-module', path]
-
-    def get_warn_args(self, level):
-        return PGIFortranCompiler.std_warn_args
-
-    def get_no_warn_args(self):
-        return ['-silent']
-
-
-class Open64FortranCompiler(FortranCompiler):
-    std_warn_args = ['-fullwarn']
-
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'open64'
-
-    def get_module_outdir_args(self, path):
-        return ['-module', path]
-
-    def get_warn_args(self, level):
-        return Open64FortranCompiler.std_warn_args
-
-class NAGFortranCompiler(FortranCompiler):
-    std_warn_args = []
-
-    def __init__(self, exelist, version, is_cross, exe_wrapper=None):
-        super().__init__(exelist, version, is_cross, exe_wrapper=None)
-        self.id = 'nagfor'
-
-    def get_module_outdir_args(self, path):
-        return ['-mdir', path]
-
-    def get_warn_args(self, level):
-        return NAGFortranCompiler.std_warn_args