meson/mesonbuild/modules/gnome.py

# Copyright 2015-2016 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.

'''This module provides helper functions for Gnome/GLib related
functionality such as gobject-introspection, gresources and gtk-doc'''

import os
import re
import sys
import copy
import shlex
import subprocess

from .. import build
from .. import mlog
from .. import mesonlib
from .. import compilers
from .. import interpreter
from . import GResourceTarget, GResourceHeaderTarget, GResourceObjectTarget, GirTarget, TypelibTarget, VapiTarget
from . import get_include_args
from . import ExtensionModule
from . import ModuleReturnValue
from ..mesonlib import (
    MachineChoice, MesonException, OrderedSet, Popen_safe, extract_as_list
)
from ..dependencies import Dependency, PkgConfigDependency, InternalDependency
from ..interpreterbase import noKwargs, permittedKwargs, FeatureNew, FeatureNewKwargs

# gresource compilation is broken due to the way
# the resource compiler and Ninja clash about it
#
# https://github.com/ninja-build/ninja/issues/1184
# https://bugzilla.gnome.org/show_bug.cgi?id=774368
gresource_dep_needed_version = '>= 2.51.1'

gresource_ld_binary_needed_version = '>= 2.60'

native_glib_version = None
girwarning_printed = False
gdbuswarning_printed = False
gresource_warning_printed = False
_gir_has_option = {}

def gir_has_option(intr_obj, option):
    global _gir_has_option
    if option in _gir_has_option:
        return _gir_has_option[option]

    _gir_has_option[option] = False
    try:
        g_ir_scanner = intr_obj.find_program_impl('g-ir-scanner').get_command()
        opts = Popen_safe(g_ir_scanner + ['--help'], stderr=subprocess.STDOUT)[1]
        _gir_has_option[option] = option in opts
    except (MesonException, FileNotFoundError, subprocess.CalledProcessError):
        pass

    return _gir_has_option[option]

class GnomeModule(ExtensionModule):
    gir_dep = None

    @staticmethod
    def _get_native_glib_version(state):
        global native_glib_version
        if native_glib_version is None:
            glib_dep = PkgConfigDependency('glib-2.0', state.environment,
                                           {'native': True, 'required': False})
            if glib_dep.found():
                native_glib_version = glib_dep.get_version()
            else:
                mlog.warning('Could not detect glib version, assuming 2.54. '
                             'You may get build errors if your glib is older.')
                native_glib_version = '2.54'
        return native_glib_version

    def __print_gresources_warning(self, state):
        global gresource_warning_printed
        if not gresource_warning_printed:
            if not mesonlib.version_compare(self._get_native_glib_version(state), gresource_dep_needed_version):
                mlog.warning('GLib compiled dependencies do not work reliably with \n'
                             'the current version of GLib. See the following upstream issue:',
                             mlog.bold('https://bugzilla.gnome.org/show_bug.cgi?id=774368'))
            gresource_warning_printed = True
        return []

    @staticmethod
    def _print_gdbus_warning():
        global gdbuswarning_printed
        if not gdbuswarning_printed:
            mlog.warning('Code generated with gdbus_codegen() requires the root directory be added to\n'
                         '  include_directories of targets with GLib < 2.51.3:',
                         mlog.bold('https://github.com/mesonbuild/meson/issues/1387'))
            gdbuswarning_printed = True

    @FeatureNewKwargs('gnome.compile_resources', '0.37.0', ['gresource_bundle', 'export', 'install_header'])
    @permittedKwargs({'source_dir', 'c_name', 'dependencies', 'export', 'gresource_bundle', 'install_header',
                      'install', 'install_dir', 'extra_args', 'build_by_default'})
    def compile_resources(self, state, args, kwargs):
        self.__print_gresources_warning(state)
        glib_version = self._get_native_glib_version(state)

        cmd = ['glib-compile-resources', '@INPUT@']

        source_dirs, dependencies = mesonlib.extract_as_list(kwargs, 'source_dir', 'dependencies', pop=True)

        if len(args) < 2:
            raise MesonException('Not enough arguments; the name of the resource '
                                 'and the path to the XML file are required')

        # Validate dependencies
        for (ii, dep) in enumerate(dependencies):
            if hasattr(dep, 'held_object'):
                dependencies[ii] = dep = dep.held_object
            if not isinstance(dep, (mesonlib.File, build.CustomTarget, build.CustomTargetIndex)):
                m = 'Unexpected dependency type {!r} for gnome.compile_resources() ' \
                    '"dependencies" argument.\nPlease pass the return value of ' \
                    'custom_target() or configure_file()'
                raise MesonException(m.format(dep))
            if isinstance(dep, (build.CustomTarget, build.CustomTargetIndex)):
                if not mesonlib.version_compare(glib_version, gresource_dep_needed_version):
                    m = 'The "dependencies" argument of gnome.compile_resources() can not\n' \
                        'be used with the current version of glib-compile-resources due to\n' \
                        '<https://bugzilla.gnome.org/show_bug.cgi?id=774368>'
                    raise MesonException(m)

        ifile = args[1]
        if isinstance(ifile, mesonlib.File):
            # glib-compile-resources will be run inside the source dir,
            # so we need either 'src_to_build' or the absolute path.
            # Absolute path is the easiest choice.
            if ifile.is_built:
                ifile = os.path.join(state.environment.get_build_dir(), ifile.subdir, ifile.fname)
            else:
                ifile = os.path.join(ifile.subdir, ifile.fname)
        elif isinstance(ifile, str):
            ifile = os.path.join(state.subdir, ifile)
        elif isinstance(ifile, (interpreter.CustomTargetHolder,
                                interpreter.CustomTargetIndexHolder,
                                interpreter.GeneratedObjectsHolder)):
            m = 'Resource xml files generated at build-time cannot be used ' \
                'with gnome.compile_resources() because we need to scan ' \
                'the xml for dependencies. Use configure_file() instead ' \
                'to generate it at configure-time.'
            raise MesonException(m)
        else:
            raise MesonException('Invalid file argument: {!r}'.format(ifile))

        depend_files, depends, subdirs = self._get_gresource_dependencies(
            state, ifile, source_dirs, dependencies)

        # Make source dirs relative to build dir now
        source_dirs = [os.path.join(state.build_to_src, state.subdir, d) for d in source_dirs]
        # Ensure build directories of generated deps are included
        source_dirs += subdirs
        # Always include current directory, but after paths set by user
        source_dirs.append(os.path.join(state.build_to_src, state.subdir))

        for source_dir in OrderedSet(source_dirs):
            cmd += ['--sourcedir', source_dir]

        if 'c_name' in kwargs:
            c_name = kwargs.pop('c_name')
            cmd += ['--c-name', c_name]
        else:
            c_name = None
        export = kwargs.pop('export', False)
        if not export:
            cmd += ['--internal']

        cmd += ['--generate', '--target', '@OUTPUT@']

        cmd += mesonlib.stringlistify(kwargs.pop('extra_args', []))

        gresource_ld_binary = False
        if mesonlib.is_linux() and mesonlib.version_compare(glib_version, gresource_ld_binary_needed_version) and not state.environment.is_cross_build():
            ld_obj = self.interpreter.find_program_impl('ld', required=False)
            if ld_obj.found():
                gresource_ld_binary = True

        gresource = kwargs.pop('gresource_bundle', False)

        if gresource:
            g_output = args[0] + '.gresource'
            g_name = args[0] + '_gresource'
        elif gresource_ld_binary:
            g_output = args[0] + '_ld_binary.gresource'
            g_name = args[0] + '_ld_binary_gresource'

        output = args[0] + '.c'
        name = args[0] + '_c'

        if kwargs.get('install', False) and not gresource:
            raise MesonException('The install kwarg only applies to gresource bundles, see install_header')

        install_header = kwargs.pop('install_header', False)
        if install_header and gresource:
            raise MesonException('The install_header kwarg does not apply to gresource bundles')
        if install_header and not export:
            raise MesonException('GResource header is installed yet export is not enabled')

        kwargs['input'] = args[1]
        kwargs['output'] = output
        kwargs['depends'] = depends
        if gresource or gresource_ld_binary:
            g_kwargs = copy.deepcopy(kwargs)
            g_kwargs['input'] = args[1]
            g_kwargs['output'] = g_output
            g_kwargs['depends'] = depends
        if not mesonlib.version_compare(glib_version, gresource_dep_needed_version):
            # This will eventually go out of sync if dependencies are added
            kwargs['depend_files'] = depend_files
            if gresource_ld_binary:
                kwargs['command'] = copy.copy(cmd) + ['--external-data']
            else:
                kwargs['command'] = cmd
            if gresource or gresource_ld_binary:
                # This will eventually go out of sync if dependencies are added
                g_kwargs['depend_files'] = depend_files
                g_kwargs['command'] = cmd
        else:
            depfile = kwargs['output'] + '.d'
            if gresource_ld_binary:
                depfile2 = kwargs['output'] + '.2.d'
                kwargs['depfile'] = depfile2
                kwargs['command'] = copy.copy(cmd) + ['--external-data', '--dependency-file', '@DEPFILE@']
            else:
                kwargs['depfile'] = depfile
                kwargs['command'] = copy.copy(cmd) + ['--dependency-file', '@DEPFILE@']
            if gresource or gresource_ld_binary:
                g_kwargs['depfile'] = depfile
                g_kwargs['command'] = copy.copy(cmd) + ['--dependency-file', '@DEPFILE@']

        if gresource or gresource_ld_binary:
            target_g = GResourceTarget(g_name, state.subdir, state.subproject, g_kwargs)
            if gresource: # Only one target for .gresource files
                return ModuleReturnValue(target_g, [target_g])

        target_c = GResourceTarget(name, state.subdir, state.subproject, kwargs)

        h_kwargs = {
            'command': cmd,
            'input': args[1],
            'output': args[0] + '.h',
            # The header doesn't actually care about the files yet it errors if missing
            'depends': depends
        }
        if 'build_by_default' in kwargs:
            h_kwargs['build_by_default'] = kwargs['build_by_default']
        if install_header:
            h_kwargs['install'] = install_header
            h_kwargs['install_dir'] = kwargs.get('install_dir',
                                                 state.environment.coredata.get_builtin_option('includedir'))
        target_h = GResourceHeaderTarget(args[0] + '_h', state.subdir, state.subproject, h_kwargs)

        if gresource_ld_binary:
            return self._create_gresource_ld_binary_targets(args, state, ifile, ld_obj, c_name, target_g, g_output, target_c, target_h)
        else:
            rv = [target_c, target_h]

        return ModuleReturnValue(rv, rv)

    def _create_gresource_ld_binary_targets(self, args, state, ifile, ld_obj, c_name, target_g, g_output, target_c, target_h):
        if c_name is None:
            # Create proper c identifier from filename in the way glib-compile-resources does
            c_name = os.path.basename(ifile).partition('.')[0]
            c_name = c_name.replace('-', '_')
            c_name = re.sub(r'^([^(_a-zA-Z)])+', '', c_name)
            c_name = re.sub(r'([^(_a-zA-Z0-9)])', '', c_name)

        c_name_no_underscores = re.sub(r'^_+', '', c_name)

        ld = ld_obj.get_command()
        objcopy_object = self.interpreter.find_program_impl('objcopy', required=False)
        if objcopy_object.found():
            objcopy = objcopy_object.get_command()
        else:
            objcopy = None

        o_kwargs = {
            'command': [ld, '-r', '-b', 'binary', '@INPUT@', '-o', '@OUTPUT@'],
            'input': target_g,
            'output': args[0] + '1.o'
        }

        target_o = GResourceObjectTarget(args[0] + '1_o', state.subdir, state.subproject, o_kwargs)

        builddir = os.path.join(state.environment.get_build_dir(), state.subdir)
        linkerscript_name = args[0] + '_map.ld'
        linkerscript_path = os.path.join(builddir, linkerscript_name)
        linkerscript_file = open(linkerscript_path, 'w')

        # Create symbol name the way bfd does
        binary_name = os.path.join(state.subdir, g_output)
        encoding = sys.getfilesystemencoding()
        symbol_name = re.sub(rb'([^(_a-zA-Z0-9)])', b'_', binary_name.encode(encoding)).decode(encoding)

        linkerscript_string = '''SECTIONS
{{
  .gresource.{} : ALIGN(8)
  {{
    {}_resource_data = _binary_{}_start;
  }}
  .data :
  {{
    *(.data)
  }}
}}'''.format(c_name_no_underscores, c_name, symbol_name)

        linkerscript_file.write(linkerscript_string)

        o2_kwargs = {
            'command': [ld, '-r', '-T', os.path.join(state.subdir, linkerscript_name), '@INPUT@', '-o', '@OUTPUT@'],
            'input': target_o,
            'output': args[0] + '2.o',
        }
        target_o2 = GResourceObjectTarget(args[0] + '2_o', state.subdir, state.subproject, o2_kwargs)

        if objcopy is not None:
            objcopy_cmd = [objcopy, '--set-section-flags', '.gresource.' + c_name + '=readonly,alloc,load,data']
            objcopy_cmd += ['-N', '_binary_' + symbol_name + '_start']
            objcopy_cmd += ['-N', '_binary_' + symbol_name + '_end']
            objcopy_cmd += ['-N', '_binary_' + symbol_name + '_size']
            objcopy_cmd += ['@INPUT@', '@OUTPUT@']

            o3_kwargs = {
                'command': objcopy_cmd,
                'input': target_o2,
                'output': args[0] + '3.o'
            }

            target_o3 = GResourceObjectTarget(args[0] + '3_o', state.subdir, state.subproject, o3_kwargs)

            rv1 = [target_c, target_h, target_o3]
            if target_g.get_id() not in self.interpreter.build.targets:
                rv2 = rv1 + [target_g, target_o, target_o2]
            else:
                rv2 = rv1 + [target_o, target_o2]
        else:
            rv1 = [target_c, target_h, target_o2]
            if target_g.get_id() not in self.interpreter.build.targets:
                rv2 = rv1 + [target_g, target_o]
            else:
                rv2 = rv1 + [target_o]

        return ModuleReturnValue(rv1, rv2)

    def _get_gresource_dependencies(self, state, input_file, source_dirs, dependencies):

        cmd = ['glib-compile-resources',
               input_file,
               '--generate-dependencies']

        # Prefer generated files over source files
        cmd += ['--sourcedir', state.subdir] # Current build dir
        for source_dir in source_dirs:
            cmd += ['--sourcedir', os.path.join(state.subdir, source_dir)]

        pc, stdout, stderr = Popen_safe(cmd, cwd=state.environment.get_source_dir())
        if pc.returncode != 0:
            m = 'glib-compile-resources failed to get dependencies for {}:\n{}'
            mlog.warning(m.format(cmd[1], stderr))
            raise subprocess.CalledProcessError(pc.returncode, cmd)

        dep_files = stdout.split('\n')[:-1]

        depends = []
        subdirs = []
        for resfile in dep_files[:]:
            resbasename = os.path.basename(resfile)
            for dep in dependencies:
                if hasattr(dep, 'held_object'):
                    dep = dep.held_object
                if isinstance(dep, mesonlib.File):
                    if dep.fname != resbasename:
                        continue
                    dep_files.remove(resfile)
                    dep_files.append(dep)
                    subdirs.append(dep.subdir)
                    break
                elif isinstance(dep, (build.CustomTarget, build.CustomTargetIndex)):
                    fname = None
                    outputs = {(o, os.path.basename(o)) for o in dep.get_outputs()}
                    for o, baseo in outputs:
                        if baseo == resbasename:
                            fname = o
                            break
                    if fname is not None:
                        dep_files.remove(resfile)
                        depends.append(dep)
                        subdirs.append(dep.get_subdir())
                        break
            else:
                # In generate-dependencies mode, glib-compile-resources doesn't raise
                # an error for missing resources but instead prints whatever filename
                # was listed in the input file.  That's good because it means we can
                # handle resource files that get generated as part of the build, as
                # follows.
                #
                # If there are multiple generated resource files with the same basename
                # then this code will get confused.
                try:
                    f = mesonlib.File.from_source_file(state.environment.get_source_dir(),
                                                       ".", resfile)
                except MesonException:
                    raise MesonException(
                        'Resource "%s" listed in "%s" was not found. If this is a '
                        'generated file, pass the target that generates it to '
                        'gnome.compile_resources() using the "dependencies" '
                        'keyword argument.' % (resfile, input_file))
                dep_files.remove(resfile)
                dep_files.append(f)
        return dep_files, depends, subdirs

    def _get_link_args(self, state, lib, depends, include_rpath=False,
                       use_gir_args=False):
        link_command = []
        # Construct link args
        if isinstance(lib, build.SharedLibrary):
            libdir = os.path.join(state.environment.get_build_dir(), state.backend.get_target_dir(lib))
            link_command.append('-L' + libdir)
            # Needed for the following binutils bug:
            # https://github.com/mesonbuild/meson/issues/1911
            # However, g-ir-scanner does not understand -Wl,-rpath
            # so we need to use -L instead
            for d in state.backend.determine_rpath_dirs(lib):
                d = os.path.join(state.environment.get_build_dir(), d)
                link_command.append('-L' + d)
                if include_rpath:
                    link_command.append('-Wl,-rpath,' + d)
            if include_rpath:
                link_command.append('-Wl,-rpath,' + libdir)
            depends.append(lib)
        if gir_has_option(self.interpreter, '--extra-library') and use_gir_args:
            link_command.append('--extra-library=' + lib.name)
        else:
            link_command.append('-l' + lib.name)
        return link_command

    def _get_dependencies_flags(self, deps, state, depends, include_rpath=False,
                                use_gir_args=False, separate_nodedup=False):
        cflags = OrderedSet()
        internal_ldflags = OrderedSet()
        external_ldflags = OrderedSet()
        # External linker flags that can't be de-duped reliably because they
        # require two args in order, such as -framework AVFoundation
        external_ldflags_nodedup = []
        gi_includes = OrderedSet()
        deps = mesonlib.listify(deps, unholder=True)

        for dep in deps:
            if isinstance(dep, InternalDependency):
                cflags.update(dep.get_compile_args())
                cflags.update(get_include_args(dep.include_directories))
                for lib in dep.libraries:
                    if hasattr(lib, 'held_object'):
                        lib = lib.held_object
                    if isinstance(lib, build.SharedLibrary):
                        internal_ldflags.update(self._get_link_args(state, lib, depends, include_rpath))
                        libdepflags = self._get_dependencies_flags(lib.get_external_deps(), state, depends, include_rpath,
                                                                   use_gir_args, True)
                        cflags.update(libdepflags[0])
                        internal_ldflags.update(libdepflags[1])
                        external_ldflags.update(libdepflags[2])
                        external_ldflags_nodedup += libdepflags[3]
                        gi_includes.update(libdepflags[4])
                extdepflags = self._get_dependencies_flags(dep.ext_deps, state, depends, include_rpath,
                                                           use_gir_args, True)
                cflags.update(extdepflags[0])
                internal_ldflags.update(extdepflags[1])
                external_ldflags.update(extdepflags[2])
                external_ldflags_nodedup += extdepflags[3]
                gi_includes.update(extdepflags[4])
                for source in dep.sources:
                    if hasattr(source, 'held_object'):
                        source = source.held_object
                    if isinstance(source, GirTarget):
                        gi_includes.update([os.path.join(state.environment.get_build_dir(),
                                            source.get_subdir())])
            # This should be any dependency other than an internal one.
            elif isinstance(dep, Dependency):
                cflags.update(dep.get_compile_args())
                ldflags = iter(dep.get_link_args(raw=True))
                for lib in ldflags:
                    if (os.path.isabs(lib) and
                            # For PkgConfigDependency only:
                            getattr(dep, 'is_libtool', False)):
                        lib_dir = os.path.dirname(lib)
                        external_ldflags.update(["-L%s" % lib_dir])
                        if include_rpath:
                            external_ldflags.update(['-Wl,-rpath {}'.format(lib_dir)])
                        libname = os.path.basename(lib)
                        if libname.startswith("lib"):
                            libname = libname[3:]
                        libname = libname.split(".so")[0]
                        lib = "-l%s" % libname
                    # FIXME: Hack to avoid passing some compiler options in
                    if lib.startswith("-W"):
                        continue
                    # If it's a framework arg, slurp the framework name too
                    # to preserve the order of arguments
                    if lib == '-framework':
                        external_ldflags_nodedup += [lib, next(ldflags)]
                    else:
                        external_ldflags.update([lib])

                if isinstance(dep, PkgConfigDependency):
                    girdir = dep.get_pkgconfig_variable("girdir", {'default': ''})
                    if girdir:
                        gi_includes.update([girdir])
            elif isinstance(dep, (build.StaticLibrary, build.SharedLibrary)):
                cflags.update(get_include_args(dep.get_include_dirs()))
                depends.append(dep)
            else:
                mlog.log('dependency {!r} not handled to build gir files'.format(dep))
                continue

        if gir_has_option(self.interpreter, '--extra-library') and use_gir_args:
            def fix_ldflags(ldflags):
                fixed_ldflags = OrderedSet()
                for ldflag in ldflags:
                    if ldflag.startswith("-l"):
                        ldflag = ldflag.replace('-l', '--extra-library=', 1)
                    fixed_ldflags.add(ldflag)
                return fixed_ldflags
            internal_ldflags = fix_ldflags(internal_ldflags)
            external_ldflags = fix_ldflags(external_ldflags)
        if not separate_nodedup:
            external_ldflags.update(external_ldflags_nodedup)
            return cflags, internal_ldflags, external_ldflags, gi_includes
        else:
            return cflags, internal_ldflags, external_ldflags, external_ldflags_nodedup, gi_includes

    def _unwrap_gir_target(self, girtarget, state):
        while hasattr(girtarget, 'held_object'):
            girtarget = girtarget.held_object

        if not isinstance(girtarget, (build.Executable, build.SharedLibrary,
                                      build.StaticLibrary)):
            raise MesonException('Gir target must be an executable or library')

        STATIC_BUILD_REQUIRED_VERSION = ">=1.58.1"
        if isinstance(girtarget, (build.StaticLibrary)) and \
           not mesonlib.version_compare(
               self._get_gir_dep(state)[0].get_version(),
               STATIC_BUILD_REQUIRED_VERSION):
            raise MesonException('Static libraries can only be introspected with GObject-Introspection ' + STATIC_BUILD_REQUIRED_VERSION)

        return girtarget

    def _get_gir_dep(self, state):
        try:
            gir_dep = self.gir_dep or PkgConfigDependency('gobject-introspection-1.0',
                                                          state.environment,
                                                          {'native': True})
            pkgargs = gir_dep.get_compile_args()
        except Exception:
            raise MesonException('gobject-introspection dependency was not found, gir cannot be generated.')

        return gir_dep, pkgargs

    def _scan_header(self, kwargs):
        ret = []
        header = kwargs.pop('header', None)
        if header:
            if not isinstance(header, str):
                raise MesonException('header must be a string')
            ret = ['--c-include=' + header]
        return ret

    def _scan_extra_args(self, kwargs):
        return mesonlib.stringlistify(kwargs.pop('extra_args', []))

    def _scan_link_withs(self, state, depends, kwargs):
        ret = []
        if 'link_with' in kwargs:
            link_with = mesonlib.extract_as_list(kwargs, 'link_with', pop = True)

            for link in link_with:
                ret += self._get_link_args(state, link.held_object, depends,
                                           use_gir_args=True)
        return ret

    # May mutate depends and gir_inc_dirs
    def _scan_include(self, state, depends, gir_inc_dirs, kwargs):
        ret = []

        if 'includes' in kwargs:
            includes = mesonlib.extract_as_list(kwargs, 'includes', pop = True)
            for inc in includes:
                if hasattr(inc, 'held_object'):
                    inc = inc.held_object
                if isinstance(inc, str):
                    ret += ['--include=%s' % (inc, )]
                elif isinstance(inc, GirTarget):
                    gir_inc_dirs += [
                        os.path.join(state.environment.get_build_dir(),
                                     inc.get_subdir()),
                    ]
                    ret += [
                        "--include-uninstalled=%s" % (os.path.join(inc.get_subdir(), inc.get_basename()), )
                    ]
                    depends += [inc]
                else:
                    raise MesonException(
                        'Gir includes must be str, GirTarget, or list of them')

        return ret

    def _scan_symbol_prefix(self, kwargs):
        ret = []

        if 'symbol_prefix' in kwargs:
            sym_prefixes = mesonlib.stringlistify(kwargs.pop('symbol_prefix', []))
            ret += ['--symbol-prefix=%s' % sym_prefix for sym_prefix in sym_prefixes]

        return ret

    def _scan_identifier_prefix(self, kwargs):
        ret = []

        if 'identifier_prefix' in kwargs:
            identifier_prefix = kwargs.pop('identifier_prefix')
            if not isinstance(identifier_prefix, str):
                raise MesonException('Gir identifier prefix must be str')
            ret += ['--identifier-prefix=%s' % identifier_prefix]

        return ret

    def _scan_export_packages(self, kwargs):
        ret = []

        if 'export_packages' in kwargs:
            pkgs = kwargs.pop('export_packages')
            if isinstance(pkgs, str):
                ret += ['--pkg-export=%s' % pkgs]
            elif isinstance(pkgs, list):
                ret += ['--pkg-export=%s' % pkg for pkg in pkgs]
            else:
                raise MesonException('Gir export packages must be str or list')

        return ret

    def _scan_inc_dirs(self, kwargs):
        ret = mesonlib.extract_as_list(kwargs, 'include_directories', pop = True)
        for incd in ret:
            if not isinstance(incd.held_object, (str, build.IncludeDirs)):
                raise MesonException(
                    'Gir include dirs should be include_directories().')
        return ret

    def _scan_langs(self, state, langs):
        ret = []

        for lang in langs:
            link_args = state.environment.coredata.get_external_link_args(MachineChoice.HOST, lang)
            for link_arg in link_args:
                if link_arg.startswith('-L'):
                    ret.append(link_arg)

        return ret

    def _scan_gir_targets(self, state, girtargets):
        ret = []

        for girtarget in girtargets:
            if isinstance(girtarget, build.Executable):
                ret += ['--program', girtarget]
            else:
                # Because of https://gitlab.gnome.org/GNOME/gobject-introspection/merge_requests/72
                # we can't use the full path until this is merged.
                if isinstance(girtarget, build.SharedLibrary):
                    libname = girtarget.get_basename()
                else:
                    libname = os.path.join("@PRIVATE_OUTDIR_ABS_%s@" % girtarget.get_id(), girtarget.get_filename())
                # Needed for the following binutils bug:
                # https://github.com/mesonbuild/meson/issues/1911
                # However, g-ir-scanner does not understand -Wl,-rpath
                # so we need to use -L instead
                for d in state.backend.determine_rpath_dirs(girtarget):
                    d = os.path.join(state.environment.get_build_dir(), d)
                    ret.append('-L' + d)
                ret += ['--library', libname]
                # need to put our output directory first as we need to use the
                # generated libraries instead of any possibly installed system/prefix
                # ones.
                ret += ["-L@PRIVATE_OUTDIR_ABS_%s@" % girtarget.get_id()]

        return ret

    def _get_girtargets_langs_compilers(self, girtargets):
        ret = []
        for girtarget in girtargets:
            for lang, compiler in girtarget.compilers.items():
                # XXX: Can you use g-i with any other language?
                if lang in ('c', 'cpp', 'objc', 'objcpp', 'd'):
                    ret.append((lang, compiler))
                    break

        return ret

    def _get_gir_targets_deps(self, girtargets):
        ret = []
        for girtarget in girtargets:
            ret += girtarget.get_all_link_deps()
            ret += girtarget.get_external_deps()
        return ret

    def _get_gir_targets_inc_dirs(self, girtargets):
        ret = []
        for girtarget in girtargets:
            ret += girtarget.get_include_dirs()
        return ret

    def _get_langs_compilers_flags(self, state, langs_compilers):
        cflags = []
        internal_ldflags = []
        external_ldflags = []

        for lang, compiler in langs_compilers:
            if state.global_args.get(lang):
                cflags += state.global_args[lang]
            if state.project_args.get(lang):
                cflags += state.project_args[lang]
            if 'b_sanitize' in compiler.base_options:
                sanitize = state.environment.coredata.base_options['b_sanitize'].value
                cflags += compilers.sanitizer_compile_args(sanitize)
                sanitize = sanitize.split(',')
                # These must be first in ldflags
                if 'address' in sanitize:
                    internal_ldflags += ['-lasan']
                if 'thread' in sanitize:
                    internal_ldflags += ['-ltsan']
                if 'undefined' in sanitize:
                    internal_ldflags += ['-lubsan']
                # FIXME: Linking directly to lib*san is not recommended but g-ir-scanner
                # does not understand -f LDFLAGS. https://bugzilla.gnome.org/show_bug.cgi?id=783892
                # ldflags += compilers.sanitizer_link_args(sanitize)

        return cflags, internal_ldflags, external_ldflags

    def _make_gir_filelist(self, state, srcdir, ns, nsversion, girtargets, libsources):
        gir_filelist_dir = state.backend.get_target_private_dir_abs(girtargets[0])
        if not os.path.isdir(gir_filelist_dir):
            os.mkdir(gir_filelist_dir)
        gir_filelist_filename = os.path.join(gir_filelist_dir, '%s_%s_gir_filelist' % (ns, nsversion))

        with open(gir_filelist_filename, 'w', encoding='utf-8') as gir_filelist:
            for s in libsources:
                if hasattr(s, 'held_object'):
                    s = s.held_object
                if isinstance(s, (build.CustomTarget, build.CustomTargetIndex)):
                    for custom_output in s.get_outputs():
                        gir_filelist.write(os.path.join(state.environment.get_build_dir(),
                                                        state.backend.get_target_dir(s),
                                                        custom_output) + '\n')
                elif isinstance(s, mesonlib.File):
                    gir_filelist.write(s.rel_to_builddir(state.build_to_src) + '\n')
                elif isinstance(s, build.GeneratedList):
                    for gen_src in s.get_outputs():
                        gir_filelist.write(os.path.join(srcdir, gen_src) + '\n')
                else:
                    gir_filelist.write(os.path.join(srcdir, s) + '\n')

        return gir_filelist_filename

    def _make_gir_target(self, state, girfile, scan_command, depends, kwargs):
        scankwargs = {'output': girfile,
                      'command': scan_command,
                      'depends': depends}

        if 'install' in kwargs:
            scankwargs['install'] = kwargs['install']
            scankwargs['install_dir'] = kwargs.get('install_dir_gir',
                                                   os.path.join(state.environment.get_datadir(), 'gir-1.0'))

        if 'build_by_default' in kwargs:
            scankwargs['build_by_default'] = kwargs['build_by_default']

        return GirTarget(girfile, state.subdir, state.subproject, scankwargs)

    def _make_typelib_target(self, state, typelib_output, typelib_cmd, kwargs):
        typelib_kwargs = {
            'output': typelib_output,
            'command': typelib_cmd,
        }

        if 'install' in kwargs:
            typelib_kwargs['install'] = kwargs['install']
            typelib_kwargs['install_dir'] = kwargs.get('install_dir_typelib',
                                                       os.path.join(state.environment.get_libdir(), 'girepository-1.0'))

        if 'build_by_default' in kwargs:
            typelib_kwargs['build_by_default'] = kwargs['build_by_default']

        return TypelibTarget(typelib_output, state.subdir, state.subproject, typelib_kwargs)

    # May mutate depends
    def _gather_typelib_includes_and_update_depends(self, state, deps, depends):
        # Need to recursively add deps on GirTarget sources from our
        # dependencies and also find the include directories needed for the
        # typelib generation custom target below.
        typelib_includes = []
        for dep in deps:
            if hasattr(dep, 'held_object'):
                dep = dep.held_object
            # Add a dependency on each GirTarget listed in dependencies and add
            # the directory where it will be generated to the typelib includes
            if isinstance(dep, InternalDependency):
                for source in dep.sources:
                    if hasattr(source, 'held_object'):
                        source = source.held_object
                    if isinstance(source, GirTarget) and source not in depends:
                        depends.append(source)
                        subdir = os.path.join(state.environment.get_build_dir(),
                                              source.get_subdir())
                        if subdir not in typelib_includes:
                            typelib_includes.append(subdir)
            # Do the same, but for dependencies of dependencies. These are
            # stored in the list of generated sources for each link dep (from
            # girtarget.get_all_link_deps() above).
            # FIXME: Store this in the original form from declare_dependency()
            # so it can be used here directly.
            elif isinstance(dep, build.SharedLibrary):
                for source in dep.generated:
                    if isinstance(source, GirTarget):
                        subdir = os.path.join(state.environment.get_build_dir(),
                                              source.get_subdir())
                        if subdir not in typelib_includes:
                            typelib_includes.append(subdir)
            elif isinstance(dep, PkgConfigDependency):
                girdir = dep.get_pkgconfig_variable("girdir", {'default': ''})
                if girdir and girdir not in typelib_includes:
                    typelib_includes.append(girdir)

        return typelib_includes

    def _get_external_args_for_langs(self, state, langs):
        ret = []
        for lang in langs:
            ret += state.environment.coredata.get_external_args(MachineChoice.HOST, lang)
        return ret

    @staticmethod
    def _get_scanner_cflags(cflags):
        'g-ir-scanner only accepts -I/-D/-U; must ignore all other flags'
        for f in cflags:
            if f.startswith(('-D', '-U', '-I')):
                yield f

    @staticmethod
    def _get_scanner_ldflags(ldflags):
        'g-ir-scanner only accepts -L/-l; must ignore -F and other linker flags'
        for f in ldflags:
            if f.startswith(('-L', '-l', '--extra-library')):
                yield f

    @FeatureNewKwargs('build target', '0.40.0', ['build_by_default'])
    @permittedKwargs({'sources', 'nsversion', 'namespace', 'symbol_prefix', 'identifier_prefix',
                      'export_packages', 'includes', 'dependencies', 'link_with', 'include_directories',
                      'install', 'install_dir_gir', 'install_dir_typelib', 'extra_args',
                      'packages', 'header', 'build_by_default'})
    def generate_gir(self, state, args, kwargs):
        if not args:
            raise MesonException('generate_gir takes at least one argument')
        if kwargs.get('install_dir'):
            raise MesonException('install_dir is not supported with generate_gir(), see "install_dir_gir" and "install_dir_typelib"')

        giscanner = self.interpreter.find_program_impl('g-ir-scanner')
        gicompiler = self.interpreter.find_program_impl('g-ir-compiler')

        girtargets = [self._unwrap_gir_target(arg, state) for arg in args]

        if len(girtargets) > 1 and any([isinstance(el, build.Executable) for el in girtargets]):
            raise MesonException('generate_gir only accepts a single argument when one of the arguments is an executable')

        self.gir_dep, pkgargs = self._get_gir_dep(state)

        ns = kwargs.pop('namespace')
        nsversion = kwargs.pop('nsversion')
        libsources = mesonlib.extract_as_list(kwargs, 'sources', pop=True)
        girfile = '%s-%s.gir' % (ns, nsversion)
        srcdir = os.path.join(state.environment.get_source_dir(), state.subdir)
        builddir = os.path.join(state.environment.get_build_dir(), state.subdir)
        depends = [] + girtargets
        gir_inc_dirs = []
        langs_compilers = self._get_girtargets_langs_compilers(girtargets)
        cflags, internal_ldflags, external_ldflags = self._get_langs_compilers_flags(state, langs_compilers)
        deps = self._get_gir_targets_deps(girtargets)
        deps += extract_as_list(kwargs, 'dependencies', pop=True, unholder=True)
        typelib_includes = self._gather_typelib_includes_and_update_depends(state, deps, depends)
        # ldflags will be misinterpreted by gir scanner (showing
        # spurious dependencies) but building GStreamer fails if they
        # are not used here.
        dep_cflags, dep_internal_ldflags, dep_external_ldflags, gi_includes = \
            self._get_dependencies_flags(deps, state, depends, use_gir_args=True)
        cflags += list(self._get_scanner_cflags(dep_cflags))
        cflags += list(self._get_scanner_cflags(self._get_external_args_for_langs(state, [lc[0] for lc in langs_compilers])))
        internal_ldflags += list(self._get_scanner_ldflags(dep_internal_ldflags))
        external_ldflags += list(self._get_scanner_ldflags(dep_external_ldflags))
        girtargets_inc_dirs = self._get_gir_targets_inc_dirs(girtargets)
        inc_dirs = self._scan_inc_dirs(kwargs)

        scan_command = [giscanner]
        scan_command += pkgargs
        scan_command += ['--no-libtool']
        scan_command += ['--namespace=' + ns, '--nsversion=' + nsversion]
        scan_command += ['--warn-all']
        scan_command += ['--output', '@OUTPUT@']
        scan_command += self._scan_header(kwargs)
        scan_command += self._scan_extra_args(kwargs)
        scan_command += ['-I' + srcdir, '-I' + builddir]
        scan_command += get_include_args(girtargets_inc_dirs)
        scan_command += ['--filelist=' + self._make_gir_filelist(state, srcdir, ns, nsversion, girtargets, libsources)]
        scan_command += self._scan_link_withs(state, depends, kwargs)
        scan_command += self._scan_include(state, depends, gir_inc_dirs, kwargs)
        scan_command += self._scan_symbol_prefix(kwargs)
        scan_command += self._scan_identifier_prefix(kwargs)
        scan_command += self._scan_export_packages(kwargs)
        scan_command += ['--cflags-begin']
        scan_command += cflags
        scan_command += ['--cflags-end']
        scan_command += get_include_args(inc_dirs)
        scan_command += get_include_args(list(gi_includes) + gir_inc_dirs + inc_dirs, prefix='--add-include-path=')
        scan_command += list(internal_ldflags)
        scan_command += self._scan_gir_targets(state, girtargets)
        scan_command += self._scan_langs(state, [lc[0] for lc in langs_compilers])
        scan_command += list(external_ldflags)

        if gir_has_option(self.interpreter, '--sources-top-dirs'):
            scan_command += ['--sources-top-dirs', os.path.join(state.environment.get_source_dir(), self.interpreter.subproject_dir, state.subproject)]
            scan_command += ['--sources-top-dirs', os.path.join(state.environment.get_build_dir(), self.interpreter.subproject_dir, state.subproject)]

        scan_target = self._make_gir_target(state, girfile, scan_command, depends, kwargs)

        typelib_output = '%s-%s.typelib' % (ns, nsversion)
        typelib_cmd = [gicompiler, scan_target, '--output', '@OUTPUT@']
        typelib_cmd += get_include_args(gir_inc_dirs, prefix='--includedir=')

        for incdir in typelib_includes:
            typelib_cmd += ["--includedir=" + incdir]

        typelib_target = self._make_typelib_target(state, typelib_output, typelib_cmd, kwargs)

        rv = [scan_target, typelib_target]

        return ModuleReturnValue(rv, rv)

    @FeatureNewKwargs('build target', '0.40.0', ['build_by_default'])
    @permittedKwargs({'build_by_default', 'depend_files'})
    def compile_schemas(self, state, args, kwargs):
        if args:
            raise MesonException('Compile_schemas does not take positional arguments.')
        srcdir = os.path.join(state.build_to_src, state.subdir)
        outdir = state.subdir

        cmd = [self.interpreter.find_program_impl('glib-compile-schemas')]
        cmd += ['--targetdir', outdir, srcdir]
        kwargs['command'] = cmd
        kwargs['input'] = []
        kwargs['output'] = 'gschemas.compiled'
        if state.subdir == '':
            targetname = 'gsettings-compile'
        else:
            targetname = 'gsettings-compile-' + state.subdir.replace('/', '_')
        target_g = build.CustomTarget(targetname, state.subdir, state.subproject, kwargs)
        return ModuleReturnValue(target_g, [target_g])

    @permittedKwargs({'sources', 'media', 'symlink_media', 'languages'})
    def yelp(self, state, args, kwargs):
        if len(args) < 1:
            raise MesonException('Yelp requires a project id')

        project_id = args[0]
        sources = mesonlib.stringlistify(kwargs.pop('sources', []))
        if not sources:
            if len(args) > 1:
                sources = mesonlib.stringlistify(args[1:])
            if not sources:
                raise MesonException('Yelp requires a list of sources')
        source_str = '@@'.join(sources)

        langs = mesonlib.stringlistify(kwargs.pop('languages', []))
        if langs:
            mlog.deprecation('''The "languages" argument of gnome.yelp() is deprecated.
Use a LINGUAS file in the sources directory instead.
This will become a hard error in the future.''')

        media = mesonlib.stringlistify(kwargs.pop('media', []))
        symlinks = kwargs.pop('symlink_media', True)

        if not isinstance(symlinks, bool):
            raise MesonException('symlink_media must be a boolean')

        if kwargs:
            raise MesonException('Unknown arguments passed: {}'.format(', '.join(kwargs.keys())))

        script = state.environment.get_build_command()
        args = ['--internal',
                'yelphelper',
                'install',
                '--subdir=' + state.subdir,
                '--id=' + project_id,
                '--installdir=' + os.path.join(state.environment.get_datadir(), 'help'),
                '--sources=' + source_str]
        if symlinks:
            args.append('--symlinks=true')
        if media:
            args.append('--media=' + '@@'.join(media))
        if langs:
            args.append('--langs=' + '@@'.join(langs))
        inscript = build.RunScript(script, args)

        potargs = state.environment.get_build_command() + [
            '--internal', 'yelphelper', 'pot',
            '--subdir=' + state.subdir,
            '--id=' + project_id,
            '--sources=' + source_str,
        ]
        pottarget = build.RunTarget('help-' + project_id + '-pot', potargs[0],
                                    potargs[1:], [], state.subdir, state.subproject)

        poargs = state.environment.get_build_command() + [
            '--internal', 'yelphelper', 'update-po',
            '--subdir=' + state.subdir,
            '--id=' + project_id,
            '--sources=' + source_str,
            '--langs=' + '@@'.join(langs),
        ]
        potarget = build.RunTarget('help-' + project_id + '-update-po', poargs[0],
                                   poargs[1:], [], state.subdir, state.subproject)

        rv = [inscript, pottarget, potarget]
        return ModuleReturnValue(None, rv)

    @FeatureNewKwargs('gnome.gtkdoc', '0.48.0', ['c_args'])
    @FeatureNewKwargs('gnome.gtkdoc', '0.48.0', ['module_version'])
    @FeatureNewKwargs('gnome.gtkdoc', '0.37.0', ['namespace', 'mode'])
    @permittedKwargs({'main_xml', 'main_sgml', 'src_dir', 'dependencies', 'install',
                      'install_dir', 'scan_args', 'scanobjs_args', 'gobject_typesfile',
                      'fixxref_args', 'html_args', 'html_assets', 'content_files',
                      'mkdb_args', 'ignore_headers', 'include_directories',
                      'namespace', 'mode', 'expand_content_files', 'module_version',
                      'c_args'})
    def gtkdoc(self, state, args, kwargs):
        if len(args) != 1:
            raise MesonException('Gtkdoc must have one positional argument.')
        modulename = args[0]
        if not isinstance(modulename, str):
            raise MesonException('Gtkdoc arg must be string.')
        if 'src_dir' not in kwargs:
            raise MesonException('Keyword argument src_dir missing.')
        main_file = kwargs.get('main_sgml', '')
        if not isinstance(main_file, str):
            raise MesonException('Main sgml keyword argument must be a string.')
        main_xml = kwargs.get('main_xml', '')
        if not isinstance(main_xml, str):
            raise MesonException('Main xml keyword argument must be a string.')
        moduleversion = kwargs.get('module_version', '')
        if not isinstance(moduleversion, str):
            raise MesonException('Module version keyword argument must be a string.')
        if main_xml != '':
            if main_file != '':
                raise MesonException('You can only specify main_xml or main_sgml, not both.')
            main_file = main_xml
        targetname = modulename + ('-' + moduleversion if moduleversion else '') + '-doc'
        command = state.environment.get_build_command()

        namespace = kwargs.get('namespace', '')
        mode = kwargs.get('mode', 'auto')
        VALID_MODES = ('xml', 'sgml', 'none', 'auto')
        if mode not in VALID_MODES:
            raise MesonException('gtkdoc: Mode {} is not a valid mode: {}'.format(mode, VALID_MODES))

        src_dirs = mesonlib.extract_as_list(kwargs, 'src_dir')
        header_dirs = []
        for src_dir in src_dirs:
            if hasattr(src_dir, 'held_object'):
                src_dir = src_dir.held_object
                if not isinstance(src_dir, build.IncludeDirs):
                    raise MesonException('Invalid keyword argument for src_dir.')
                for inc_dir in src_dir.get_incdirs():
                    header_dirs.append(os.path.join(state.environment.get_source_dir(),
                                                    src_dir.get_curdir(), inc_dir))
                    header_dirs.append(os.path.join(state.environment.get_build_dir(),
                                                    src_dir.get_curdir(), inc_dir))
            else:
                header_dirs.append(src_dir)

        args = ['--internal', 'gtkdoc',
                '--sourcedir=' + state.environment.get_source_dir(),
                '--builddir=' + state.environment.get_build_dir(),
                '--subdir=' + state.subdir,
                '--headerdirs=' + '@@'.join(header_dirs),
                '--mainfile=' + main_file,
                '--modulename=' + modulename,
                '--moduleversion=' + moduleversion,
                '--mode=' + mode]
        if namespace:
            args.append('--namespace=' + namespace)
        args += self._unpack_args('--htmlargs=', 'html_args', kwargs)
        args += self._unpack_args('--scanargs=', 'scan_args', kwargs)
        args += self._unpack_args('--scanobjsargs=', 'scanobjs_args', kwargs)
        args += self._unpack_args('--gobjects-types-file=', 'gobject_typesfile', kwargs, state)
        args += self._unpack_args('--fixxrefargs=', 'fixxref_args', kwargs)
        args += self._unpack_args('--mkdbargs=', 'mkdb_args', kwargs)
        args += self._unpack_args('--html-assets=', 'html_assets', kwargs, state)

        depends = []
        content_files = []
        for s in mesonlib.extract_as_list(kwargs, 'content_files'):
            if hasattr(s, 'held_object'):
                s = s.held_object
            if isinstance(s, (build.CustomTarget, build.CustomTargetIndex)):
                depends.append(s)
                for o in s.get_outputs():
                    content_files.append(os.path.join(state.environment.get_build_dir(),
                                                      state.backend.get_target_dir(s),
                                                      o))
            elif isinstance(s, mesonlib.File):
                content_files.append(s.absolute_path(state.environment.get_source_dir(),
                                                     state.environment.get_build_dir()))
            elif isinstance(s, build.GeneratedList):
                depends.append(s)
                for gen_src in s.get_outputs():
                    content_files.append(os.path.join(state.environment.get_source_dir(),
                                                      state.subdir,
                                                      gen_src))
            elif isinstance(s, str):
                content_files.append(os.path.join(state.environment.get_source_dir(),
                                                  state.subdir,
                                                  s))
            else:
                raise MesonException(
                    'Invalid object type: {!r}'.format(s.__class__.__name__))
        args += ['--content-files=' + '@@'.join(content_files)]

        args += self._unpack_args('--expand-content-files=', 'expand_content_files', kwargs, state)
        args += self._unpack_args('--ignore-headers=', 'ignore_headers', kwargs)
        args += self._unpack_args('--installdir=', 'install_dir', kwargs)
        args += self._get_build_args(kwargs, state, depends)
        res = [build.RunTarget(targetname, command[0], command[1:] + args, depends, state.subdir, state.subproject)]
        if kwargs.get('install', True):
            res.append(build.RunScript(command, args))
        return ModuleReturnValue(None, res)

    def _get_build_args(self, kwargs, state, depends):
        args = []
        deps = extract_as_list(kwargs, 'dependencies', unholder=True)
        cflags = OrderedSet()
        cflags.update(mesonlib.stringlistify(kwargs.pop('c_args', [])))
        deps_cflags, internal_ldflags, external_ldflags, gi_includes = \
            self._get_dependencies_flags(deps, state, depends, include_rpath=True)
        inc_dirs = mesonlib.extract_as_list(kwargs, 'include_directories')
        for incd in inc_dirs:
            if not isinstance(incd.held_object, (str, build.IncludeDirs)):
                raise MesonException(
                    'Gir include dirs should be include_directories().')

        cflags.update(deps_cflags)
        cflags.update(get_include_args(inc_dirs))
        ldflags = OrderedSet()
        ldflags.update(internal_ldflags)
        ldflags.update(external_ldflags)

        cflags.update(state.environment.coredata.get_external_args(MachineChoice.HOST, 'c'))
        ldflags.update(state.environment.coredata.get_external_link_args(MachineChoice.HOST, 'c'))
        if state.environment.is_cross_build():
            compiler = state.environment.coredata.cross_compilers.get('c')
        else:
            compiler = state.environment.coredata.compilers.get('c')

        compiler_flags = self._get_langs_compilers_flags(state, [('c', compiler)])
        cflags.update(compiler_flags[0])
        ldflags.update(compiler_flags[1])
        ldflags.update(compiler_flags[2])
        if compiler:
            args += ['--cc=%s' % ' '.join([shlex.quote(x) for x in compiler.get_exelist()])]
            args += ['--ld=%s' % ' '.join([shlex.quote(x) for x in compiler.get_linker_exelist()])]
        if cflags:
            args += ['--cflags=%s' % ' '.join([shlex.quote(x) for x in cflags])]
        if ldflags:
            args += ['--ldflags=%s' % ' '.join([shlex.quote(x) for x in ldflags])]

        return args

    @noKwargs
    def gtkdoc_html_dir(self, state, args, kwargs):
        if len(args) != 1:
            raise MesonException('Must have exactly one argument.')
        modulename = args[0]
        if not isinstance(modulename, str):
            raise MesonException('Argument must be a string')
        return ModuleReturnValue(os.path.join('share/gtk-doc/html', modulename), [])

    @staticmethod
    def _unpack_args(arg, kwarg_name, kwargs, expend_file_state=None):
        if kwarg_name not in kwargs:
            return []

        new_args = mesonlib.extract_as_list(kwargs, kwarg_name)
        args = []
        for i in new_args:
            if expend_file_state and isinstance(i, mesonlib.File):
                i = i.absolute_path(expend_file_state.environment.get_source_dir(), expend_file_state.environment.get_build_dir())
            elif expend_file_state and isinstance(i, str):
                i = os.path.join(expend_file_state.environment.get_source_dir(), expend_file_state.subdir, i)
            elif not isinstance(i, str):
                raise MesonException(kwarg_name + ' values must be strings.')
            args.append(i)

        if args:
            return [arg + '@@'.join(args)]

        return []

    def _get_autocleanup_args(self, kwargs, glib_version):
        if not mesonlib.version_compare(glib_version, '>= 2.49.1'):
            # Warn if requested, silently disable if not
            if 'autocleanup' in kwargs:
                mlog.warning('Glib version ({}) is too old to support the \'autocleanup\' '
                             'kwarg, need 2.49.1 or newer'.format(glib_version))
            return []
        autocleanup = kwargs.pop('autocleanup', 'all')
        values = ('none', 'objects', 'all')
        if autocleanup not in values:
            raise MesonException('gdbus_codegen does not support {!r} as an autocleanup value, '
                                 'must be one of: {!r}'.format(autocleanup, ', '.join(values)))
        return ['--c-generate-autocleanup', autocleanup]

    @FeatureNewKwargs('build target', '0.46.0', ['install_header', 'install_dir', 'sources'])
    @FeatureNewKwargs('build target', '0.40.0', ['build_by_default'])
    @FeatureNewKwargs('build target', '0.47.0', ['extra_args', 'autocleanup'])
    @permittedKwargs({'interface_prefix', 'namespace', 'extra_args', 'autocleanup', 'object_manager', 'build_by_default',
                      'annotations', 'docbook', 'install_header', 'install_dir', 'sources'})
    def gdbus_codegen(self, state, args, kwargs):
        if len(args) not in (1, 2):
            raise MesonException('gdbus_codegen takes at most two arguments, name and xml file.')
        namebase = args[0]
        xml_files = args[1:]
        cmd = [self.interpreter.find_program_impl('gdbus-codegen')]
        extra_args = mesonlib.stringlistify(kwargs.pop('extra_args', []))
        cmd += extra_args
        # Autocleanup supported?
        glib_version = self._get_native_glib_version(state)
        cmd += self._get_autocleanup_args(kwargs, glib_version)
        if 'interface_prefix' in kwargs:
            cmd += ['--interface-prefix', kwargs.pop('interface_prefix')]
        if 'namespace' in kwargs:
            cmd += ['--c-namespace', kwargs.pop('namespace')]
        if kwargs.get('object_manager', False):
            cmd += ['--c-generate-object-manager']
        if 'sources' in kwargs:
            xml_files += mesonlib.listify(kwargs.pop('sources'))
        build_by_default = kwargs.get('build_by_default', False)

        # Annotations are a bit ugly in that they are a list of lists of strings...
        annotations = kwargs.pop('annotations', [])
        if not isinstance(annotations, list):
            raise MesonException('annotations takes a list')
        if annotations and isinstance(annotations, list) and not isinstance(annotations[0], list):
            annotations = [annotations]

        for annotation in annotations:
            if len(annotation) != 3 or not all(isinstance(i, str) for i in annotation):
                raise MesonException('Annotations must be made up of 3 strings for ELEMENT, KEY, and VALUE')
            cmd += ['--annotate'] + annotation

        targets = []
        install_header = kwargs.get('install_header', False)
        install_dir = kwargs.get('install_dir', state.environment.coredata.get_builtin_option('includedir'))

        output = namebase + '.c'
        # Added in https://gitlab.gnome.org/GNOME/glib/commit/e4d68c7b3e8b01ab1a4231bf6da21d045cb5a816 (2.55.2)
        # Fixed in https://gitlab.gnome.org/GNOME/glib/commit/cd1f82d8fc741a2203582c12cc21b4dacf7e1872 (2.56.2)
        if mesonlib.version_compare(glib_version, '>= 2.56.2'):
            custom_kwargs = {'input': xml_files,
                             'output': output,
                             'command': cmd + ['--body', '--output', '@OUTPUT@', '@INPUT@'],
                             'build_by_default': build_by_default
                             }
        else:
            if 'docbook' in kwargs:
                docbook = kwargs['docbook']
                if not isinstance(docbook, str):
                    raise MesonException('docbook value must be a string.')

                cmd += ['--generate-docbook', docbook]

            # https://git.gnome.org/browse/glib/commit/?id=ee09bb704fe9ccb24d92dd86696a0e6bb8f0dc1a
            if mesonlib.version_compare(glib_version, '>= 2.51.3'):
                cmd += ['--output-directory', '@OUTDIR@', '--generate-c-code', namebase, '@INPUT@']
            else:
                self._print_gdbus_warning()
                cmd += ['--generate-c-code', '@OUTDIR@/' + namebase, '@INPUT@']

            custom_kwargs = {'input': xml_files,
                             'output': output,
                             'command': cmd,
                             'build_by_default': build_by_default
                             }

        cfile_custom_target = build.CustomTarget(output, state.subdir, state.subproject, custom_kwargs)
        targets.append(cfile_custom_target)

        output = namebase + '.h'
        if mesonlib.version_compare(glib_version, '>= 2.56.2'):
            custom_kwargs = {'input': xml_files,
                             'output': output,
                             'command': cmd + ['--header', '--output', '@OUTPUT@', '@INPUT@'],
                             'build_by_default': build_by_default,
                             'install': install_header,
                             'install_dir': install_dir
                             }
        else:
            custom_kwargs = {'input': xml_files,
                             'output': output,
                             'command': cmd,
                             'build_by_default': build_by_default,
                             'install': install_header,
                             'install_dir': install_dir,
                             'depends': cfile_custom_target
                             }

        hfile_custom_target = build.CustomTarget(output, state.subdir, state.subproject, custom_kwargs)
        targets.append(hfile_custom_target)

        if 'docbook' in kwargs:
            docbook = kwargs['docbook']
            if not isinstance(docbook, str):
                raise MesonException('docbook value must be a string.')

            docbook_cmd = cmd + ['--output-directory', '@OUTDIR@', '--generate-docbook', docbook, '@INPUT@']

            # The docbook output is always ${docbook}-${name_of_xml_file}
            output = namebase + '-docbook'
            outputs = []
            for f in xml_files:
                outputs.append('{}-{}'.format(docbook, os.path.basename(str(f))))

            if mesonlib.version_compare(glib_version, '>= 2.56.2'):
                custom_kwargs = {'input': xml_files,
                                 'output': outputs,
                                 'command': docbook_cmd,
                                 'build_by_default': build_by_default
                                 }
            else:
                custom_kwargs = {'input': xml_files,
                                 'output': outputs,
                                 'command': cmd,
                                 'build_by_default': build_by_default,
                                 'depends': cfile_custom_target
                                 }

            docbook_custom_target = build.CustomTarget(output, state.subdir, state.subproject, custom_kwargs)
            targets.append(docbook_custom_target)

        return ModuleReturnValue(targets, targets)

    @permittedKwargs({'sources', 'c_template', 'h_template', 'install_header', 'install_dir',
                      'comments', 'identifier_prefix', 'symbol_prefix', 'eprod', 'vprod',
                      'fhead', 'fprod', 'ftail', 'vhead', 'vtail', 'depends'})
    def mkenums(self, state, args, kwargs):
        if len(args) != 1:
            raise MesonException('Mkenums requires one positional argument.')
        basename = args[0]

        if 'sources' not in kwargs:
            raise MesonException('Missing keyword argument "sources".')
        sources = kwargs.pop('sources')
        if isinstance(sources, str):
            sources = [sources]
        elif not isinstance(sources, list):
            raise MesonException(
                'Sources keyword argument must be a string or array.')

        cmd = []
        known_kwargs = ['comments', 'eprod', 'fhead', 'fprod', 'ftail',
                        'identifier_prefix', 'symbol_prefix', 'template',
                        'vhead', 'vprod', 'vtail']
        known_custom_target_kwargs = ['install_dir', 'build_always',
                                      'depends', 'depend_files']
        c_template = h_template = None
        install_header = False
        for arg, value in kwargs.items():
            if arg == 'sources':
                raise AssertionError("sources should've already been handled")
            elif arg == 'c_template':
                c_template = value
                if isinstance(c_template, mesonlib.File):
                    c_template = c_template.absolute_path(state.environment.source_dir, state.environment.build_dir)
                if 'template' in kwargs:
                    raise MesonException('Mkenums does not accept both '
                                         'c_template and template keyword '
                                         'arguments at the same time.')
            elif arg == 'h_template':
                h_template = value
                if isinstance(h_template, mesonlib.File):
                    h_template = h_template.absolute_path(state.environment.source_dir, state.environment.build_dir)
                if 'template' in kwargs:
                    raise MesonException('Mkenums does not accept both '
                                         'h_template and template keyword '
                                         'arguments at the same time.')
            elif arg == 'install_header':
                install_header = value
            elif arg in known_kwargs:
                cmd += ['--' + arg.replace('_', '-'), value]
            elif arg not in known_custom_target_kwargs:
                raise MesonException(
                    'Mkenums does not take a %s keyword argument.' % (arg, ))
        cmd = [self.interpreter.find_program_impl(['glib-mkenums', 'mkenums'])] + cmd
        custom_kwargs = {}
        for arg in known_custom_target_kwargs:
            if arg in kwargs:
                custom_kwargs[arg] = kwargs[arg]

        targets = []

        if h_template is not None:
            h_output = os.path.basename(os.path.splitext(h_template)[0])
            # We always set template as the first element in the source array
            # so --template consumes it.
            h_cmd = cmd + ['--template', '@INPUT@']
            h_sources = [h_template] + sources
            custom_kwargs['install'] = install_header
            if 'install_dir' not in custom_kwargs:
                custom_kwargs['install_dir'] = \
                    state.environment.coredata.get_builtin_option('includedir')
            h_target = self._make_mkenum_custom_target(state, h_sources,
                                                       h_output, h_cmd,
                                                       custom_kwargs)
            targets.append(h_target)

        if c_template is not None:
            c_output = os.path.basename(os.path.splitext(c_template)[0])
            # We always set template as the first element in the source array
            # so --template consumes it.
            c_cmd = cmd + ['--template', '@INPUT@']
            c_sources = [c_template] + sources
            # Never install the C file. Complain on bug tracker if you need it.
            custom_kwargs['install'] = False
            if h_template is not None:
                if 'depends' in custom_kwargs:
                    custom_kwargs['depends'] += [h_target]
                else:
                    custom_kwargs['depends'] = h_target
            c_target = self._make_mkenum_custom_target(state, c_sources,
                                                       c_output, c_cmd,
                                                       custom_kwargs)
            targets.insert(0, c_target)

        if c_template is None and h_template is None:
            generic_cmd = cmd + ['@INPUT@']
            custom_kwargs['install'] = install_header
            if 'install_dir' not in custom_kwargs:
                custom_kwargs['install_dir'] = \
                    state.environment.coredata.get_builtin_option('includedir')
            target = self._make_mkenum_custom_target(state, sources, basename,
                                                     generic_cmd, custom_kwargs)
            return ModuleReturnValue(target, [target])
        elif len(targets) == 1:
            return ModuleReturnValue(targets[0], [targets[0]])
        else:
            return ModuleReturnValue(targets, targets)

    @FeatureNew('gnome.mkenums_simple', '0.42.0')
    def mkenums_simple(self, state, args, kwargs):
        hdr_filename = args[0] + '.h'
        body_filename = args[0] + '.c'

        # not really needed, just for sanity checking
        forbidden_kwargs = ['c_template', 'h_template', 'eprod', 'fhead',
                            'fprod', 'ftail', 'vhead', 'vtail', 'comments']
        for arg in forbidden_kwargs:
            if arg in kwargs:
                raise MesonException('mkenums_simple() does not take a %s keyword argument' % (arg, ))

        # kwargs to pass as-is from mkenums_simple() to mkenums()
        shared_kwargs = ['sources', 'install_header', 'install_dir',
                         'identifier_prefix', 'symbol_prefix']
        mkenums_kwargs = {}
        for arg in shared_kwargs:
            if arg in kwargs:
                mkenums_kwargs[arg] = kwargs[arg]

        # .c file generation
        c_file_kwargs = copy.deepcopy(mkenums_kwargs)
        if 'sources' not in kwargs:
            raise MesonException('Missing keyword argument "sources".')
        sources = kwargs['sources']
        if isinstance(sources, str):
            sources = [sources]
        elif not isinstance(sources, list):
            raise MesonException(
                'Sources keyword argument must be a string or array.')

        # The `install_header` argument will be used by mkenums() when
        # not using template files, so we need to forcibly unset it
        # when generating the C source file, otherwise we will end up
        # installing it
        c_file_kwargs['install_header'] = False

        header_prefix = kwargs.get('header_prefix', '')
        decl_decorator = kwargs.get('decorator', '')
        func_prefix = kwargs.get('function_prefix', '')
        body_prefix = kwargs.get('body_prefix', '')

        # Maybe we should write our own template files into the build dir
        # instead, but that seems like much more work, nice as it would be.
        fhead = ''
        if body_prefix != '':
            fhead += '%s\n' % body_prefix
        fhead += '#include "%s"\n' % hdr_filename
        for hdr in sources:
            fhead += '#include "%s"\n' % os.path.basename(str(hdr))
        fhead += '''
#define C_ENUM(v) ((gint) v)
#define C_FLAGS(v) ((guint) v)
'''
        c_file_kwargs['fhead'] = fhead

        c_file_kwargs['fprod'] = '''
/* enumerations from "@basename@" */
'''

        c_file_kwargs['vhead'] = '''
GType
%s@enum_name@_get_type (void)
{
  static volatile gsize gtype_id = 0;
  static const G@Type@Value values[] = {''' % func_prefix

        c_file_kwargs['vprod'] = '    { C_@TYPE@(@VALUENAME@), "@VALUENAME@", "@valuenick@" },'

        c_file_kwargs['vtail'] = '''    { 0, NULL, NULL }
  };
  if (g_once_init_enter (&gtype_id)) {
    GType new_type = g_@type@_register_static ("@EnumName@", values);
    g_once_init_leave (&gtype_id, new_type);
  }
  return (GType) gtype_id;
}'''

        rv = self.mkenums(state, [body_filename], c_file_kwargs)
        c_file = rv.return_value

        # .h file generation
        h_file_kwargs = copy.deepcopy(mkenums_kwargs)

        h_file_kwargs['fhead'] = '''#pragma once

#include <glib-object.h>
{}

G_BEGIN_DECLS
'''.format(header_prefix)

        h_file_kwargs['fprod'] = '''
/* enumerations from "@basename@" */
'''

        h_file_kwargs['vhead'] = '''
{}
GType {}@enum_name@_get_type (void);
#define @ENUMPREFIX@_TYPE_@ENUMSHORT@ ({}@enum_name@_get_type())'''.format(decl_decorator, func_prefix, func_prefix)

        h_file_kwargs['ftail'] = '''
G_END_DECLS'''

        rv = self.mkenums(state, [hdr_filename], h_file_kwargs)
        h_file = rv.return_value

        return ModuleReturnValue([c_file, h_file], [c_file, h_file])

    @staticmethod
    def _make_mkenum_custom_target(state, sources, output, cmd, kwargs):
        custom_kwargs = {
            'input': sources,
            'output': output,
            'capture': True,
            'command': cmd
        }
        custom_kwargs.update(kwargs)
        return build.CustomTarget(output, state.subdir, state.subproject, custom_kwargs,
                                  # https://github.com/mesonbuild/meson/issues/973
                                  absolute_paths=True)

    @permittedKwargs({'sources', 'prefix', 'install_header', 'install_dir', 'stdinc',
                      'nostdinc', 'internal', 'skip_source', 'valist_marshallers',
                      'extra_args'})
    def genmarshal(self, state, args, kwargs):
        if len(args) != 1:
            raise MesonException(
                'Genmarshal requires one positional argument.')
        output = args[0]

        if 'sources' not in kwargs:
            raise MesonException('Missing keyword argument "sources".')
        sources = kwargs.pop('sources')
        if isinstance(sources, str):
            sources = [sources]
        elif not isinstance(sources, list):
            raise MesonException(
                'Sources keyword argument must be a string or array.')

        new_genmarshal = mesonlib.version_compare(self._get_native_glib_version(state), '>= 2.53.3')

        cmd = [self.interpreter.find_program_impl('glib-genmarshal')]
        known_kwargs = ['internal', 'nostdinc', 'skip_source', 'stdinc',
                        'valist_marshallers', 'extra_args']
        known_custom_target_kwargs = ['build_always', 'depends',
                                      'depend_files', 'install_dir',
                                      'install_header']
        for arg, value in kwargs.items():
            if arg == 'prefix':
                cmd += ['--prefix', value]
            elif arg == 'extra_args':
                if new_genmarshal:
                    cmd += mesonlib.stringlistify(value)
                else:
                    mlog.warning('The current version of GLib does not support extra arguments \n'
                                 'for glib-genmarshal. You need at least GLib 2.53.3. See ',
                                 mlog.bold('https://github.com/mesonbuild/meson/pull/2049'))
            elif arg in known_kwargs and value:
                cmd += ['--' + arg.replace('_', '-')]
            elif arg not in known_custom_target_kwargs:
                raise MesonException(
                    'Genmarshal does not take a %s keyword argument.' % (
                        arg, ))

        install_header = kwargs.pop('install_header', False)
        install_dir = kwargs.pop('install_dir', None)

        custom_kwargs = {
            'input': sources,
        }

        # https://github.com/GNOME/glib/commit/0fbc98097fac4d3e647684f344e508abae109fdf
        if mesonlib.version_compare(self._get_native_glib_version(state), '>= 2.51.0'):
            cmd += ['--output', '@OUTPUT@']
        else:
            custom_kwargs['capture'] = True

        for arg in known_custom_target_kwargs:
            if arg in kwargs:
                custom_kwargs[arg] = kwargs[arg]

        header_file = output + '.h'
        custom_kwargs['command'] = cmd + ['--body', '@INPUT@']
        if mesonlib.version_compare(self._get_native_glib_version(state), '>= 2.53.4'):
            # Silence any warnings about missing prototypes
            custom_kwargs['command'] += ['--include-header', header_file]
        custom_kwargs['output'] = output + '.c'
        body = build.CustomTarget(output + '_c', state.subdir, state.subproject, custom_kwargs)

        custom_kwargs['install'] = install_header
        if install_dir is not None:
            custom_kwargs['install_dir'] = install_dir
        if new_genmarshal:
            cmd += ['--pragma-once']
        custom_kwargs['command'] = cmd + ['--header', '@INPUT@']
        custom_kwargs['output'] = header_file
        header = build.CustomTarget(output + '_h', state.subdir, state.subproject, custom_kwargs)

        rv = [body, header]
        return ModuleReturnValue(rv, rv)

    @staticmethod
    def _vapi_args_to_command(prefix, variable, kwargs, accept_vapi=False):
        arg_list = mesonlib.extract_as_list(kwargs, variable)
        ret = []
        for arg in arg_list:
            if not isinstance(arg, str):
                types = 'strings' + ' or InternalDependencys' if accept_vapi else ''
                raise MesonException('All {} must be {}'.format(variable, types))
            ret.append(prefix + arg)
        return ret

    def _extract_vapi_packages(self, state, kwargs):
        '''
        Packages are special because we need to:
        - Get a list of packages for the .deps file
        - Get a list of depends for any VapiTargets
        - Get package name from VapiTargets
        - Add include dirs for any VapiTargets
        '''
        arg_list = kwargs.get('packages')
        if not arg_list:
            return [], [], [], []
        arg_list = mesonlib.listify(arg_list)
        vapi_depends = []
        vapi_packages = []
        vapi_includes = []
        ret = []
        remaining_args = []
        for arg in arg_list:
            if hasattr(arg, 'held_object'):
                arg = arg.held_object
            if isinstance(arg, InternalDependency):
                targets = [t for t in arg.sources if isinstance(t, VapiTarget)]
                for target in targets:
                    srcdir = os.path.join(state.environment.get_source_dir(),
                                          target.get_subdir())
                    outdir = os.path.join(state.environment.get_build_dir(),
                                          target.get_subdir())
                    outfile = target.get_outputs()[0][:-5] # Strip .vapi
                    ret.append('--vapidir=' + outdir)
                    ret.append('--girdir=' + outdir)
                    ret.append('--pkg=' + outfile)
                    vapi_depends.append(target)
                    vapi_packages.append(outfile)
                    vapi_includes.append(srcdir)
            else:
                vapi_packages.append(arg)
                remaining_args.append(arg)

        kwargs['packages'] = remaining_args
        vapi_args = ret + self._vapi_args_to_command('--pkg=', 'packages', kwargs, accept_vapi=True)
        return vapi_args, vapi_depends, vapi_packages, vapi_includes

    def _generate_deps(self, state, library, packages, install_dir):
        outdir = state.environment.scratch_dir
        fname = os.path.join(outdir, library + '.deps')
        with open(fname, 'w') as ofile:
            for package in packages:
                ofile.write(package + '\n')
        return build.Data(mesonlib.File(True, outdir, fname), install_dir)

    def _get_vapi_link_with(self, target):
        link_with = []
        for dep in target.get_target_dependencies():
            if isinstance(dep, build.SharedLibrary):
                link_with.append(dep)
            elif isinstance(dep, GirTarget):
                link_with += self._get_vapi_link_with(dep)
        return link_with

    @permittedKwargs({'sources', 'packages', 'metadata_dirs', 'gir_dirs',
                      'vapi_dirs', 'install', 'install_dir'})
    def generate_vapi(self, state, args, kwargs):
        if len(args) != 1:
            raise MesonException('The library name is required')

        if not isinstance(args[0], str):
            raise MesonException('The first argument must be the name of the library')
        created_values = []

        library = args[0]
        build_dir = os.path.join(state.environment.get_build_dir(), state.subdir)
        source_dir = os.path.join(state.environment.get_source_dir(), state.subdir)
        pkg_cmd, vapi_depends, vapi_packages, vapi_includes = self._extract_vapi_packages(state, kwargs)
        if 'VAPIGEN' in os.environ:
            cmd = [self.interpreter.find_program_impl(os.environ['VAPIGEN'])]
        else:
            cmd = [self.interpreter.find_program_impl('vapigen')]
        cmd += ['--quiet', '--library=' + library, '--directory=' + build_dir]
        cmd += self._vapi_args_to_command('--vapidir=', 'vapi_dirs', kwargs)
        cmd += self._vapi_args_to_command('--metadatadir=', 'metadata_dirs', kwargs)
        cmd += self._vapi_args_to_command('--girdir=', 'gir_dirs', kwargs)
        cmd += pkg_cmd
        cmd += ['--metadatadir=' + source_dir]

        if 'sources' not in kwargs:
            raise MesonException('sources are required to generate the vapi file')

        inputs = mesonlib.extract_as_list(kwargs, 'sources')

        link_with = []
        for i in inputs:
            if isinstance(i, str):
                cmd.append(os.path.join(source_dir, i))
            elif hasattr(i, 'held_object') and isinstance(i.held_object, GirTarget):
                link_with += self._get_vapi_link_with(i.held_object)
                subdir = os.path.join(state.environment.get_build_dir(),
                                      i.held_object.get_subdir())
                gir_file = os.path.join(subdir, i.held_object.get_outputs()[0])
                cmd.append(gir_file)
            else:
                raise MesonException('Input must be a str or GirTarget')

        vapi_output = library + '.vapi'
        custom_kwargs = {
            'command': cmd,
            'input': inputs,
            'output': vapi_output,
            'depends': vapi_depends,
        }
        install_dir = kwargs.get('install_dir',
                                 os.path.join(state.environment.coredata.get_builtin_option('datadir'),
                                              'vala', 'vapi'))
        if kwargs.get('install'):
            custom_kwargs['install'] = kwargs['install']
            custom_kwargs['install_dir'] = install_dir

            # We shouldn't need this locally but we install it
            deps_target = self._generate_deps(state, library, vapi_packages, install_dir)
            created_values.append(deps_target)
        vapi_target = VapiTarget(vapi_output, state.subdir, state.subproject, custom_kwargs)

        # So to try our best to get this to just work we need:
        # - link with with the correct library
        # - include the vapi and dependent vapi files in sources
        # - add relevant directories to include dirs
        incs = [build.IncludeDirs(state.subdir, ['.'] + vapi_includes, False)]
        sources = [vapi_target] + vapi_depends
        rv = InternalDependency(None, incs, [], [], link_with, [], sources, [])
        created_values.append(rv)
        return ModuleReturnValue(rv, created_values)

def initialize(*args, **kwargs):
    return GnomeModule(*args, **kwargs)