unittests/linuxliketests.py

# SPDX-License-Identifier: Apache-2.0
# Copyright 2016-2022 The Meson development team

import stat
import subprocess
import re
import tempfile
import textwrap
import os
import shutil
import hashlib
from unittest import mock, skipUnless, SkipTest
from glob import glob
from pathlib import Path
import typing as T

import mesonbuild.mlog
import mesonbuild.depfile
import mesonbuild.dependencies.base
import mesonbuild.dependencies.factory
import mesonbuild.envconfig
import mesonbuild.environment
import mesonbuild.coredata
import mesonbuild.modules.gnome
from mesonbuild.mesonlib import (
    MachineChoice, is_windows, is_osx, is_cygwin, is_openbsd, is_haiku,
    is_sunos, windows_proof_rmtree, version_compare, is_linux,
    OptionKey, EnvironmentException
)
from mesonbuild.compilers import (
    detect_c_compiler, detect_cpp_compiler, compiler_from_language,
)
from mesonbuild.compilers.c import AppleClangCCompiler
from mesonbuild.compilers.cpp import AppleClangCPPCompiler
from mesonbuild.compilers.objc import AppleClangObjCCompiler
from mesonbuild.compilers.objcpp import AppleClangObjCPPCompiler
from mesonbuild.dependencies.pkgconfig import PkgConfigDependency, PkgConfigCLI, PkgConfigInterface
import mesonbuild.modules.pkgconfig

PKG_CONFIG = os.environ.get('PKG_CONFIG', 'pkg-config')


from run_tests import (
    get_fake_env
)

from .baseplatformtests import BasePlatformTests
from .helpers import *

def _prepend_pkg_config_path(path: str) -> str:
    """Prepend a string value to pkg_config_path

    :param path: The path to prepend
    :return: The path, followed by any PKG_CONFIG_PATH already in the environment
    """
    pkgconf = os.environ.get('PKG_CONFIG_PATH')
    if pkgconf:
        return f'{path}{os.path.pathsep}{pkgconf}'
    return path


def _clang_at_least(compiler: 'Compiler', minver: str, apple_minver: T.Optional[str]) -> bool:
    """
    check that Clang compiler is at least a specified version, whether AppleClang or regular Clang

    Parameters
    ----------
    compiler:
        Meson compiler object
    minver: str
        Clang minimum version
    apple_minver: str
        AppleCLang minimum version

    Returns
    -------
    at_least: bool
        Clang is at least the specified version
    """
    if isinstance(compiler, (AppleClangCCompiler, AppleClangCPPCompiler)):
        if apple_minver is None:
            return False
        return version_compare(compiler.version, apple_minver)
    return version_compare(compiler.version, minver)

@skipUnless(not is_windows(), "requires something Unix-like")
class LinuxlikeTests(BasePlatformTests):
    '''
    Tests that should run on Linux, macOS, and *BSD
    '''

    def test_basic_soname(self):
        '''
        Test that the soname is set correctly for shared libraries. This can't
        be an ordinary test case because we need to run `readelf` and actually
        check the soname.
        https://github.com/mesonbuild/meson/issues/785
        '''
        testdir = os.path.join(self.common_test_dir, '4 shared')
        self.init(testdir)
        self.build()
        lib1 = os.path.join(self.builddir, 'libmylib.so')
        soname = get_soname(lib1)
        self.assertEqual(soname, 'libmylib.so')

    def test_custom_soname(self):
        '''
        Test that the soname is set correctly for shared libraries when
        a custom prefix and/or suffix is used. This can't be an ordinary test
        case because we need to run `readelf` and actually check the soname.
        https://github.com/mesonbuild/meson/issues/785
        '''
        testdir = os.path.join(self.common_test_dir, '24 library versions')
        self.init(testdir)
        self.build()
        lib1 = os.path.join(self.builddir, 'prefixsomelib.suffix')
        soname = get_soname(lib1)
        self.assertEqual(soname, 'prefixsomelib.suffix')

    def test_pic(self):
        '''
        Test that -fPIC is correctly added to static libraries when b_staticpic
        is true and not when it is false. This can't be an ordinary test case
        because we need to inspect the compiler database.
        '''
        if is_windows() or is_cygwin() or is_osx():
            raise SkipTest('PIC not relevant')

        testdir = os.path.join(self.common_test_dir, '3 static')
        self.init(testdir)
        compdb = self.get_compdb()
        self.assertIn('-fPIC', compdb[0]['command'])
        self.setconf('-Db_staticpic=false')
        # Regenerate build
        self.build()
        compdb = self.get_compdb()
        self.assertNotIn('-fPIC', compdb[0]['command'])

    @mock.patch.dict(os.environ)
    def test_pkgconfig_gen(self):
        '''
        Test that generated pkg-config files can be found and have the correct
        version and link args. This can't be an ordinary test case because we
        need to run pkg-config outside of a Meson build file.
        https://github.com/mesonbuild/meson/issues/889
        '''
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen')
        self.init(testdir)
        env = get_fake_env(testdir, self.builddir, self.prefix)
        kwargs = {'required': True, 'silent': True}
        os.environ['PKG_CONFIG_LIBDIR'] = self.privatedir
        foo_dep = PkgConfigDependency('libfoo', env, kwargs)
        self.assertTrue(foo_dep.found())
        self.assertEqual(foo_dep.get_version(), '1.0')
        self.assertIn('-lfoo', foo_dep.get_link_args())
        self.assertEqual(foo_dep.get_variable(pkgconfig='foo'), 'bar')
        self.assertPathEqual(foo_dep.get_variable(pkgconfig='datadir'), '/usr/data')

        libhello_nolib = PkgConfigDependency('libhello_nolib', env, kwargs)
        self.assertTrue(libhello_nolib.found())
        self.assertEqual(libhello_nolib.get_link_args(), [])
        self.assertEqual(libhello_nolib.get_compile_args(), [])
        self.assertEqual(libhello_nolib.get_variable(pkgconfig='foo'), 'bar')
        self.assertEqual(libhello_nolib.get_variable(pkgconfig='prefix'), self.prefix)
        impl = libhello_nolib.pkgconfig
        if not isinstance(impl, PkgConfigCLI) or version_compare(impl.pkgbin_version, ">=0.29.1"):
            self.assertEqual(libhello_nolib.get_variable(pkgconfig='escaped_var'), r'hello\ world')
        self.assertEqual(libhello_nolib.get_variable(pkgconfig='unescaped_var'), 'hello world')

        cc = detect_c_compiler(env, MachineChoice.HOST)
        if cc.get_id() in {'gcc', 'clang'}:
            for name in {'ct', 'ct0'}:
                ct_dep = PkgConfigDependency(name, env, kwargs)
                self.assertTrue(ct_dep.found())
                self.assertIn('-lct', ct_dep.get_link_args(raw=True))

    def test_pkgconfig_gen_deps(self):
        '''
        Test that generated pkg-config files correctly handle dependencies
        '''
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen')
        self.init(testdir)
        privatedir1 = self.privatedir

        self.new_builddir()
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen', 'dependencies')
        self.init(testdir, override_envvars={'PKG_CONFIG_LIBDIR': privatedir1})
        privatedir2 = self.privatedir

        env = {
            'PKG_CONFIG_LIBDIR': os.pathsep.join([privatedir1, privatedir2]),
            'PKG_CONFIG_SYSTEM_LIBRARY_PATH': '/usr/lib',
        }
        self._run([PKG_CONFIG, 'dependency-test', '--validate'], override_envvars=env)

        # pkg-config strips some duplicated flags so we have to parse the
        # generated file ourself.
        expected = {
            'Requires': 'libexposed',
            'Requires.private': 'libfoo >= 1.0',
            'Libs': '-L${libdir} -llibmain -pthread -lcustom',
            'Libs.private': '-lcustom2 -L${libdir} -llibinternal',
            'Cflags': '-I${includedir} -pthread -DCUSTOM',
        }
        if is_osx() or is_haiku():
            expected['Cflags'] = expected['Cflags'].replace('-pthread ', '')
        with open(os.path.join(privatedir2, 'dependency-test.pc'), encoding='utf-8') as f:
            matched_lines = 0
            for line in f:
                parts = line.split(':', 1)
                if parts[0] in expected:
                    key = parts[0]
                    val = parts[1].strip()
                    expected_val = expected[key]
                    self.assertEqual(expected_val, val)
                    matched_lines += 1
            self.assertEqual(len(expected), matched_lines)

        cmd = [PKG_CONFIG, 'requires-test']
        out = self._run(cmd + ['--print-requires'], override_envvars=env).strip().split('\n')
        if not is_openbsd():
            self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo >= 1.0', 'libhello']))
        else:
            self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo>=1.0', 'libhello']))

        cmd = [PKG_CONFIG, 'requires-private-test']
        out = self._run(cmd + ['--print-requires-private'], override_envvars=env).strip().split('\n')
        if not is_openbsd():
            self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo >= 1.0', 'libhello']))
        else:
            self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo>=1.0', 'libhello']))

        cmd = [PKG_CONFIG, 'pub-lib-order']
        out = self._run(cmd + ['--libs'], override_envvars=env).strip().split()
        self.assertEqual(out, ['-llibmain2', '-llibinternal'])

        # See common/44 pkgconfig-gen/meson.build for description of the case this test
        with open(os.path.join(privatedir1, 'simple2.pc'), encoding='utf-8') as f:
            content = f.read()
            self.assertIn('Libs: -L${libdir} -lsimple2 -lsimple1', content)
            self.assertIn('Libs.private: -lz', content)

        with open(os.path.join(privatedir1, 'simple3.pc'), encoding='utf-8') as f:
            content = f.read()
            self.assertEqual(1, content.count('-lsimple3'))

        with open(os.path.join(privatedir1, 'simple5.pc'), encoding='utf-8') as f:
            content = f.read()
            self.assertNotIn('-lstat2', content)

    @mock.patch.dict(os.environ)
    def test_pkgconfig_uninstalled(self):
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen')
        self.init(testdir)
        self.build()

        os.environ['PKG_CONFIG_LIBDIR'] = os.path.join(self.builddir, 'meson-uninstalled')
        if is_cygwin():
            os.environ['PATH'] += os.pathsep + self.builddir

        self.new_builddir()
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen', 'dependencies')
        self.init(testdir)
        self.build()
        self.run_tests()

    def test_pkg_unfound(self):
        testdir = os.path.join(self.unit_test_dir, '23 unfound pkgconfig')
        self.init(testdir)
        with open(os.path.join(self.privatedir, 'somename.pc'), encoding='utf-8') as f:
            pcfile = f.read()
        self.assertNotIn('blub_blob_blib', pcfile)

    def test_symlink_builddir(self) -> None:
        '''
        Test using a symlink as either the builddir for "setup" or
        the argument for "-C".
        '''
        testdir = os.path.join(self.common_test_dir, '1 trivial')

        symdir = f'{self.builddir}-symlink'
        os.symlink(self.builddir, symdir)
        self.addCleanup(os.unlink, symdir)
        self.change_builddir(symdir)

        self.init(testdir)
        self.build()
        self._run(self.mtest_command)

    @skipIfNoPkgconfig
    def test_qtdependency_pkgconfig_detection(self):
        '''
        Test that qt4 and qt5 detection with pkgconfig works.
        '''
        # Verify Qt4 or Qt5 can be found with pkg-config
        qt4 = subprocess.call([PKG_CONFIG, '--exists', 'QtCore'])
        qt5 = subprocess.call([PKG_CONFIG, '--exists', 'Qt5Core'])
        testdir = os.path.join(self.framework_test_dir, '4 qt')
        self.init(testdir, extra_args=['-Dmethod=pkg-config'])
        # Confirm that the dependency was found with pkg-config
        mesonlog = self.get_meson_log_raw()
        if qt4 == 0:
            self.assertRegex(mesonlog,
                             r'Run-time dependency qt4 \(modules: Core\) found: YES 4.* \(pkg-config\)')
        if qt5 == 0:
            self.assertRegex(mesonlog,
                             r'Run-time dependency qt5 \(modules: Core\) found: YES 5.* \(pkg-config\)')

    @skip_if_not_base_option('b_sanitize')
    def test_generate_gir_with_address_sanitizer(self):
        if is_cygwin():
            raise SkipTest('asan not available on Cygwin')
        if is_openbsd():
            raise SkipTest('-fsanitize=address is not supported on OpenBSD')

        testdir = os.path.join(self.framework_test_dir, '7 gnome')
        self.init(testdir, extra_args=['-Db_sanitize=address', '-Db_lundef=false'])
        self.build()

    def test_qt5dependency_qmake_detection(self):
        '''
        Test that qt5 detection with qmake works. This can't be an ordinary
        test case because it involves setting the environment.
        '''
        # Verify that qmake is for Qt5
        if not shutil.which('qmake-qt5'):
            if not shutil.which('qmake'):
                raise SkipTest('QMake not found')
            output = subprocess.getoutput('qmake --version')
            if 'Qt version 5' not in output:
                raise SkipTest('Qmake found, but it is not for Qt 5.')
        # Disable pkg-config codepath and force searching with qmake/qmake-qt5
        testdir = os.path.join(self.framework_test_dir, '4 qt')
        self.init(testdir, extra_args=['-Dmethod=qmake'])
        # Confirm that the dependency was found with qmake
        mesonlog = self.get_meson_log_raw()
        self.assertRegex(mesonlog,
                         r'Run-time dependency qt5 \(modules: Core\) found: YES .* \(qmake\)\n')

    def test_qt6dependency_qmake_detection(self):
        '''
        Test that qt6 detection with qmake works. This can't be an ordinary
        test case because it involves setting the environment.
        '''
        # Verify that qmake is for Qt6
        if not shutil.which('qmake6'):
            if not shutil.which('qmake'):
                raise SkipTest('QMake not found')
            output = subprocess.getoutput('qmake --version')
            if 'Qt version 6' not in output:
                raise SkipTest('Qmake found, but it is not for Qt 6.')
        # Disable pkg-config codepath and force searching with qmake/qmake-qt6
        testdir = os.path.join(self.framework_test_dir, '4 qt')
        self.init(testdir, extra_args=['-Dmethod=qmake'])
        # Confirm that the dependency was found with qmake
        mesonlog = self.get_meson_log_raw()
        self.assertRegex(mesonlog,
                         r'Run-time dependency qt6 \(modules: Core\) found: YES .* \(qmake\)\n')

    def glob_sofiles_without_privdir(self, g):
        files = glob(g)
        return [f for f in files if not f.endswith('.p')]

    def _test_soname_impl(self, libpath, install):
        if is_cygwin() or is_osx():
            raise SkipTest('Test only applicable to ELF and linuxlike sonames')

        testdir = os.path.join(self.unit_test_dir, '1 soname')
        self.init(testdir)
        self.build()
        if install:
            self.install()

        # File without aliases set.
        nover = os.path.join(libpath, 'libnover.so')
        self.assertPathExists(nover)
        self.assertFalse(os.path.islink(nover))
        self.assertEqual(get_soname(nover), 'libnover.so')
        self.assertEqual(len(self.glob_sofiles_without_privdir(nover[:-3] + '*')), 1)

        # File with version set
        verset = os.path.join(libpath, 'libverset.so')
        self.assertPathExists(verset + '.4.5.6')
        self.assertEqual(os.readlink(verset), 'libverset.so.4')
        self.assertEqual(get_soname(verset), 'libverset.so.4')
        self.assertEqual(len(self.glob_sofiles_without_privdir(verset[:-3] + '*')), 3)

        # File with soversion set
        soverset = os.path.join(libpath, 'libsoverset.so')
        self.assertPathExists(soverset + '.1.2.3')
        self.assertEqual(os.readlink(soverset), 'libsoverset.so.1.2.3')
        self.assertEqual(get_soname(soverset), 'libsoverset.so.1.2.3')
        self.assertEqual(len(self.glob_sofiles_without_privdir(soverset[:-3] + '*')), 2)

        # File with version and soversion set to same values
        settosame = os.path.join(libpath, 'libsettosame.so')
        self.assertPathExists(settosame + '.7.8.9')
        self.assertEqual(os.readlink(settosame), 'libsettosame.so.7.8.9')
        self.assertEqual(get_soname(settosame), 'libsettosame.so.7.8.9')
        self.assertEqual(len(self.glob_sofiles_without_privdir(settosame[:-3] + '*')), 2)

        # File with version and soversion set to different values
        bothset = os.path.join(libpath, 'libbothset.so')
        self.assertPathExists(bothset + '.1.2.3')
        self.assertEqual(os.readlink(bothset), 'libbothset.so.1.2.3')
        self.assertEqual(os.readlink(bothset + '.1.2.3'), 'libbothset.so.4.5.6')
        self.assertEqual(get_soname(bothset), 'libbothset.so.1.2.3')
        self.assertEqual(len(self.glob_sofiles_without_privdir(bothset[:-3] + '*')), 3)

        # A shared_module that is not linked to anything
        module = os.path.join(libpath, 'libsome_module.so')
        self.assertPathExists(module)
        self.assertFalse(os.path.islink(module))
        self.assertEqual(get_soname(module), None)

        # A shared_module that is not linked to an executable with link_with:
        module = os.path.join(libpath, 'liblinked_module1.so')
        self.assertPathExists(module)
        self.assertFalse(os.path.islink(module))
        self.assertEqual(get_soname(module), 'liblinked_module1.so')

        # A shared_module that is not linked to an executable with dependencies:
        module = os.path.join(libpath, 'liblinked_module2.so')
        self.assertPathExists(module)
        self.assertFalse(os.path.islink(module))
        self.assertEqual(get_soname(module), 'liblinked_module2.so')

    def test_soname(self):
        self._test_soname_impl(self.builddir, False)

    def test_installed_soname(self):
        libdir = self.installdir + os.path.join(self.prefix, self.libdir)
        self._test_soname_impl(libdir, True)

    def test_compiler_check_flags_order(self):
        '''
        Test that compiler check flags override all other flags. This can't be
        an ordinary test case because it needs the environment to be set.
        '''
        testdir = os.path.join(self.common_test_dir, '36 has function')
        env = get_fake_env(testdir, self.builddir, self.prefix)
        cpp = detect_cpp_compiler(env, MachineChoice.HOST)
        Oflag = '-O3'
        OflagCPP = Oflag
        if cpp.get_id() in ('clang', 'gcc'):
            # prevent developers from adding "int main(int argc, char **argv)"
            # to small Meson checks unless these parameters are actually used
            OflagCPP += ' -Werror=unused-parameter'
        env = {'CFLAGS': Oflag,
               'CXXFLAGS': OflagCPP}
        self.init(testdir, override_envvars=env)
        cmds = self.get_meson_log_compiler_checks()
        for cmd in cmds:
            if cmd[0] == 'ccache':
                cmd = cmd[1:]
            # Verify that -I flags from the `args` kwarg are first
            # This is set in the '36 has function' test case
            self.assertEqual(cmd[1], '-I/tmp')
            # Verify that -O3 set via the environment is overridden by -O0
            Oargs = [arg for arg in cmd if arg.startswith('-O')]
            self.assertEqual(Oargs, [Oflag, '-O0'])

    def _test_stds_impl(self, testdir: str, compiler: 'Compiler') -> None:
        has_cpp17 = (compiler.get_id() not in {'clang', 'gcc'} or
                     compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=5.0.0', '>=9.1') or
                     compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=5.0.0'))
        has_cpp2a_c17 = (compiler.get_id() not in {'clang', 'gcc'} or
                         compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=6.0.0', '>=10.0') or
                         compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=8.0.0'))
        has_cpp20 = (compiler.get_id() not in {'clang', 'gcc'} or
                     compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=10.0.0', None) or
                     compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=10.0.0'))
        has_cpp2b = (compiler.get_id() not in {'clang', 'gcc'} or
                     compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=12.0.0', None) or
                     compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=11.0.0'))
        has_cpp23 = (compiler.get_id() not in {'clang', 'gcc'} or
                     compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=17.0.0', None) or
                     compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=11.0.0'))
        has_cpp26 = (compiler.get_id() not in {'clang', 'gcc'} or
                     compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=17.0.0', None) or
                     compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=14.0.0'))
        has_c18 = (compiler.get_id() not in {'clang', 'gcc'} or
                   compiler.get_id() == 'clang' and _clang_at_least(compiler, '>=8.0.0', '>=11.0') or
                   compiler.get_id() == 'gcc' and version_compare(compiler.version, '>=8.0.0'))
        # Check that all the listed -std=xxx options for this compiler work just fine when used
        # https://en.wikipedia.org/wiki/Xcode#Latest_versions
        # https://www.gnu.org/software/gcc/projects/cxx-status.html
        key = OptionKey('std', lang=compiler.language)
        for v in compiler.get_options()[key].choices:
            # we do it like this to handle gnu++17,c++17 and gnu17,c17 cleanly
            # thus, C++ first
            if '++17' in v and not has_cpp17:
                continue
            elif '++2a' in v and not has_cpp2a_c17:  # https://en.cppreference.com/w/cpp/compiler_support
                continue
            elif '++20' in v and not has_cpp20:
                continue
            elif '++2b' in v and not has_cpp2b:
                continue
            elif '++23' in v and not has_cpp23:
                continue
            elif ('++26' in v or '++2c' in v) and not has_cpp26:
                continue
            # now C
            elif '17' in v and not has_cpp2a_c17:
                continue
            elif '18' in v and not has_c18:
                continue
            self.init(testdir, extra_args=[f'-D{key!s}={v}'])
            cmd = self.get_compdb()[0]['command']
            # c++03 and gnu++03 are not understood by ICC, don't try to look for them
            skiplist = frozenset([
                ('intel', 'c++03'),
                ('intel', 'gnu++03')])
            if v != 'none' and not (compiler.get_id(), v) in skiplist:
                cmd_std = f" -std={v} "
                self.assertIn(cmd_std, cmd)
            try:
                self.build()
            except Exception:
                print(f'{key!s} was {v!r}')
                raise
            self.wipe()
        # Check that an invalid std option in CFLAGS/CPPFLAGS fails
        # Needed because by default ICC ignores invalid options
        cmd_std = '-std=FAIL'
        if compiler.language == 'c':
            env_flag_name = 'CFLAGS'
        elif compiler.language == 'cpp':
            env_flag_name = 'CXXFLAGS'
        else:
            raise NotImplementedError(f'Language {compiler.language} not defined.')
        env = {}
        env[env_flag_name] = cmd_std
        with self.assertRaises((subprocess.CalledProcessError, EnvironmentException),
                               msg='C compiler should have failed with -std=FAIL'):
            self.init(testdir, override_envvars = env)
            # ICC won't fail in the above because additional flags are needed to
            # make unknown -std=... options errors.
            self.build()

    def test_compiler_c_stds(self):
        '''
        Test that C stds specified for this compiler can all be used. Can't be
        an ordinary test because it requires passing options to meson.
        '''
        testdir = os.path.join(self.common_test_dir, '1 trivial')
        env = get_fake_env(testdir, self.builddir, self.prefix)
        cc = detect_c_compiler(env, MachineChoice.HOST)
        self._test_stds_impl(testdir, cc)

    def test_compiler_cpp_stds(self):
        '''
        Test that C++ stds specified for this compiler can all be used. Can't
        be an ordinary test because it requires passing options to meson.
        '''
        testdir = os.path.join(self.common_test_dir, '2 cpp')
        env = get_fake_env(testdir, self.builddir, self.prefix)
        cpp = detect_cpp_compiler(env, MachineChoice.HOST)
        self._test_stds_impl(testdir, cpp)

    def test_unity_subproj(self):
        testdir = os.path.join(self.common_test_dir, '42 subproject')
        self.init(testdir, extra_args='--unity=subprojects')
        pdirs = glob(os.path.join(self.builddir, 'subprojects/sublib/simpletest*.p'))
        self.assertEqual(len(pdirs), 1)
        self.assertPathExists(os.path.join(pdirs[0], 'simpletest-unity0.c'))
        sdirs = glob(os.path.join(self.builddir, 'subprojects/sublib/*sublib*.p'))
        self.assertEqual(len(sdirs), 1)
        self.assertPathExists(os.path.join(sdirs[0], 'sublib-unity0.c'))
        self.assertPathDoesNotExist(os.path.join(self.builddir, 'user@exe/user-unity.c'))
        self.build()

    def test_installed_modes(self):
        '''
        Test that files installed by these tests have the correct permissions.
        Can't be an ordinary test because our installed_files.txt is very basic.
        '''
        if is_cygwin():
            self.new_builddir_in_tempdir()
        # Test file modes
        testdir = os.path.join(self.common_test_dir, '12 data')
        self.init(testdir)
        self.install()

        f = os.path.join(self.installdir, 'etc', 'etcfile.dat')
        found_mode = stat.filemode(os.stat(f).st_mode)
        want_mode = 'rw-------'
        self.assertEqual(want_mode, found_mode[1:])

        f = os.path.join(self.installdir, 'usr', 'bin', 'runscript.sh')
        statf = os.stat(f)
        found_mode = stat.filemode(statf.st_mode)
        want_mode = 'rwxr-sr-x'
        self.assertEqual(want_mode, found_mode[1:])
        if os.getuid() == 0:
            # The chown failed nonfatally if we're not root
            self.assertEqual(0, statf.st_uid)
            self.assertEqual(0, statf.st_gid)

        f = os.path.join(self.installdir, 'usr', 'share', 'progname',
                         'fileobject_datafile.dat')
        orig = os.path.join(testdir, 'fileobject_datafile.dat')
        statf = os.stat(f)
        statorig = os.stat(orig)
        found_mode = stat.filemode(statf.st_mode)
        orig_mode = stat.filemode(statorig.st_mode)
        self.assertEqual(orig_mode[1:], found_mode[1:])
        self.assertEqual(os.getuid(), statf.st_uid)
        if os.getuid() == 0:
            # The chown failed nonfatally if we're not root
            self.assertEqual(0, statf.st_gid)

        self.wipe()
        # Test directory modes
        testdir = os.path.join(self.common_test_dir, '59 install subdir')
        self.init(testdir)
        self.install()

        f = os.path.join(self.installdir, 'usr', 'share', 'sub1', 'second.dat')
        statf = os.stat(f)
        found_mode = stat.filemode(statf.st_mode)
        want_mode = 'rwxr-x--x'
        self.assertEqual(want_mode, found_mode[1:])
        if os.getuid() == 0:
            # The chown failed nonfatally if we're not root
            self.assertEqual(0, statf.st_uid)

    def test_installed_modes_extended(self):
        '''
        Test that files are installed with correct permissions using install_mode.
        '''
        if is_cygwin():
            self.new_builddir_in_tempdir()
        testdir = os.path.join(self.common_test_dir, '190 install_mode')
        self.init(testdir)
        self.build()
        self.install()

        for fsobj, want_mode in [
                ('bin', 'drwxr-x---'),
                ('bin/runscript.sh', '-rwxr-sr-x'),
                ('bin/trivialprog', '-rwxr-sr-x'),
                ('include', 'drwxr-x---'),
                ('include/config.h', '-rw-rwSr--'),
                ('include/rootdir.h', '-r--r--r--'),
                ('lib', 'drwxr-x---'),
                ('lib/libstat.a', '-rw---Sr--'),
                ('share', 'drwxr-x---'),
                ('share/man', 'drwxr-x---'),
                ('share/man/man1', 'drwxr-x---'),
                ('share/man/man1/foo.1', '-r--r--r--'),
                ('share/sub1', 'drwxr-x---'),
                ('share/sub1/second.dat', '-rwxr-x--x'),
                ('subdir', 'drwxr-x---'),
                ('subdir/data.dat', '-rw-rwSr--'),
        ]:
            f = os.path.join(self.installdir, 'usr', *fsobj.split('/'))
            found_mode = stat.filemode(os.stat(f).st_mode)
            self.assertEqual(want_mode, found_mode,
                             msg=('Expected file %s to have mode %s but found %s instead.' %
                                  (fsobj, want_mode, found_mode)))
        # Ensure that introspect --installed works on all types of files
        # FIXME: also verify the files list
        self.introspect('--installed')

    def test_install_umask(self):
        '''
        Test that files are installed with correct permissions using default
        install umask of 022, regardless of the umask at time the worktree
        was checked out or the build was executed.
        '''
        if is_cygwin():
            self.new_builddir_in_tempdir()
        # Copy source tree to a temporary directory and change permissions
        # there to simulate a checkout with umask 002.
        orig_testdir = os.path.join(self.unit_test_dir, '26 install umask')
        # Create a new testdir under tmpdir.
        tmpdir = os.path.realpath(tempfile.mkdtemp())
        self.addCleanup(windows_proof_rmtree, tmpdir)
        testdir = os.path.join(tmpdir, '26 install umask')
        # Copy the tree using shutil.copyfile, which will use the current umask
        # instead of preserving permissions of the old tree.
        save_umask = os.umask(0o002)
        self.addCleanup(os.umask, save_umask)
        shutil.copytree(orig_testdir, testdir, copy_function=shutil.copyfile)
        # Preserve the executable status of subdir/sayhello though.
        os.chmod(os.path.join(testdir, 'subdir', 'sayhello'), 0o775)
        self.init(testdir)
        # Run the build under a 027 umask now.
        os.umask(0o027)
        self.build()
        # And keep umask 027 for the install step too.
        self.install()

        for executable in [
                'bin/prog',
                'share/subdir/sayhello',
        ]:
            f = os.path.join(self.installdir, 'usr', *executable.split('/'))
            found_mode = stat.filemode(os.stat(f).st_mode)
            want_mode = '-rwxr-xr-x'
            self.assertEqual(want_mode, found_mode,
                             msg=('Expected file %s to have mode %s but found %s instead.' %
                                  (executable, want_mode, found_mode)))

        for directory in [
                'usr',
                'usr/bin',
                'usr/include',
                'usr/share',
                'usr/share/man',
                'usr/share/man/man1',
                'usr/share/subdir',
        ]:
            f = os.path.join(self.installdir, *directory.split('/'))
            found_mode = stat.filemode(os.stat(f).st_mode)
            want_mode = 'drwxr-xr-x'
            self.assertEqual(want_mode, found_mode,
                             msg=('Expected directory %s to have mode %s but found %s instead.' %
                                  (directory, want_mode, found_mode)))

        for datafile in [
                'include/sample.h',
                'share/datafile.cat',
                'share/file.dat',
                'share/man/man1/prog.1',
                'share/subdir/datafile.dog',
        ]:
            f = os.path.join(self.installdir, 'usr', *datafile.split('/'))
            found_mode = stat.filemode(os.stat(f).st_mode)
            want_mode = '-rw-r--r--'
            self.assertEqual(want_mode, found_mode,
                             msg=('Expected file %s to have mode %s but found %s instead.' %
                                  (datafile, want_mode, found_mode)))

    def test_cpp_std_override(self):
        testdir = os.path.join(self.unit_test_dir, '6 std override')
        self.init(testdir)
        compdb = self.get_compdb()
        # Don't try to use -std=c++03 as a check for the
        # presence of a compiler flag, as ICC does not
        # support it.
        for i in compdb:
            if 'prog98' in i['file']:
                c98_comp = i['command']
            if 'prog11' in i['file']:
                c11_comp = i['command']
            if 'progp' in i['file']:
                plain_comp = i['command']
        self.assertNotEqual(len(plain_comp), 0)
        self.assertIn('-std=c++98', c98_comp)
        self.assertNotIn('-std=c++11', c98_comp)
        self.assertIn('-std=c++11', c11_comp)
        self.assertNotIn('-std=c++98', c11_comp)
        self.assertNotIn('-std=c++98', plain_comp)
        self.assertNotIn('-std=c++11', plain_comp)
        # Now werror
        self.assertIn('-Werror', plain_comp)
        self.assertNotIn('-Werror', c98_comp)

    def test_run_installed(self):
        if is_cygwin() or is_osx():
            raise SkipTest('LD_LIBRARY_PATH and RPATH not applicable')

        testdir = os.path.join(self.unit_test_dir, '7 run installed')
        self.init(testdir)
        self.build()
        self.install()
        installed_exe = os.path.join(self.installdir, 'usr/bin/prog')
        installed_libdir = os.path.join(self.installdir, 'usr/foo')
        installed_lib = os.path.join(installed_libdir, 'libfoo.so')
        self.assertTrue(os.path.isfile(installed_exe))
        self.assertTrue(os.path.isdir(installed_libdir))
        self.assertTrue(os.path.isfile(installed_lib))
        # Must fail when run without LD_LIBRARY_PATH to ensure that
        # rpath has been properly stripped rather than pointing to the builddir.
        self.assertNotEqual(subprocess.call(installed_exe, stderr=subprocess.DEVNULL), 0)
        # When LD_LIBRARY_PATH is set it should start working.
        # For some reason setting LD_LIBRARY_PATH in os.environ fails
        # when all tests are run (but works when only this test is run),
        # but doing this explicitly works.
        env = os.environ.copy()
        env['LD_LIBRARY_PATH'] = ':'.join([installed_libdir, env.get('LD_LIBRARY_PATH', '')])
        self.assertEqual(subprocess.call(installed_exe, env=env), 0)
        # Ensure that introspect --installed works
        installed = self.introspect('--installed')
        for v in installed.values():
            self.assertTrue('prog' in v or 'foo' in v)

    @skipIfNoPkgconfig
    def test_order_of_l_arguments(self):
        testdir = os.path.join(self.unit_test_dir, '8 -L -l order')
        self.init(testdir, override_envvars={'PKG_CONFIG_PATH': testdir})
        # NOTE: .pc file has -Lfoo -lfoo -Lbar -lbar but pkg-config reorders
        # the flags before returning them to -Lfoo -Lbar -lfoo -lbar
        # but pkgconf seems to not do that. Sigh. Support both.
        expected_order = [('-L/me/first', '-lfoo1'),
                          ('-L/me/second', '-lfoo2'),
                          ('-L/me/first', '-L/me/second'),
                          ('-lfoo1', '-lfoo2'),
                          ('-L/me/second', '-L/me/third'),
                          ('-L/me/third', '-L/me/fourth',),
                          ('-L/me/third', '-lfoo3'),
                          ('-L/me/fourth', '-lfoo4'),
                          ('-lfoo3', '-lfoo4'),
                          ]
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as ifile:
            for line in ifile:
                if expected_order[0][0] in line:
                    for first, second in expected_order:
                        self.assertLess(line.index(first), line.index(second))
                    return
        raise RuntimeError('Linker entries not found in the Ninja file.')

    def test_introspect_dependencies(self):
        '''
        Tests that mesonintrospect --dependencies returns expected output.
        '''
        testdir = os.path.join(self.framework_test_dir, '7 gnome')
        self.init(testdir)
        glib_found = False
        gobject_found = False
        deps = self.introspect('--dependencies')
        self.assertIsInstance(deps, list)
        for dep in deps:
            self.assertIsInstance(dep, dict)
            self.assertIn('name', dep)
            self.assertIn('compile_args', dep)
            self.assertIn('link_args', dep)
            if dep['name'] == 'glib-2.0':
                glib_found = True
            elif dep['name'] == 'gobject-2.0':
                gobject_found = True
        self.assertTrue(glib_found)
        self.assertTrue(gobject_found)
        if subprocess.call([PKG_CONFIG, '--exists', 'glib-2.0 >= 2.56.2']) != 0:
            raise SkipTest('glib >= 2.56.2 needed for the rest')
        targets = self.introspect('--targets')
        docbook_target = None
        for t in targets:
            if t['name'] == 'generated-gdbus-docbook':
                docbook_target = t
                break
        self.assertIsInstance(docbook_target, dict)
        self.assertEqual(os.path.basename(t['filename'][0]), 'generated-gdbus-doc-' + os.path.basename(t['target_sources'][0]['sources'][0]))

    def test_introspect_installed(self):
        testdir = os.path.join(self.linuxlike_test_dir, '7 library versions')
        self.init(testdir)

        install = self.introspect('--installed')
        install = {os.path.basename(k): v for k, v in install.items()}
        print(install)
        if is_osx():
            the_truth = {
                'libmodule.dylib': '/usr/lib/libmodule.dylib',
                'libnoversion.dylib': '/usr/lib/libnoversion.dylib',
                'libonlysoversion.5.dylib': '/usr/lib/libonlysoversion.5.dylib',
                'libonlysoversion.dylib': '/usr/lib/libonlysoversion.dylib',
                'libonlyversion.1.dylib': '/usr/lib/libonlyversion.1.dylib',
                'libonlyversion.dylib': '/usr/lib/libonlyversion.dylib',
                'libsome.0.dylib': '/usr/lib/libsome.0.dylib',
                'libsome.dylib': '/usr/lib/libsome.dylib',
            }
            the_truth_2 = {'/usr/lib/libsome.dylib',
                           '/usr/lib/libsome.0.dylib',
            }
        else:
            the_truth = {
                'libmodule.so': '/usr/lib/libmodule.so',
                'libnoversion.so': '/usr/lib/libnoversion.so',
                'libonlysoversion.so': '/usr/lib/libonlysoversion.so',
                'libonlysoversion.so.5': '/usr/lib/libonlysoversion.so.5',
                'libonlyversion.so': '/usr/lib/libonlyversion.so',
                'libonlyversion.so.1': '/usr/lib/libonlyversion.so.1',
                'libonlyversion.so.1.4.5': '/usr/lib/libonlyversion.so.1.4.5',
                'libsome.so': '/usr/lib/libsome.so',
                'libsome.so.0': '/usr/lib/libsome.so.0',
                'libsome.so.1.2.3': '/usr/lib/libsome.so.1.2.3',
            }
            the_truth_2 = {'/usr/lib/libsome.so',
                           '/usr/lib/libsome.so.0',
                           '/usr/lib/libsome.so.1.2.3'}
        self.assertDictEqual(install, the_truth)

        targets = self.introspect('--targets')
        for t in targets:
            if t['name'] != 'some':
                continue
            self.assertSetEqual(the_truth_2, set(t['install_filename']))

    def test_build_rpath(self):
        if is_cygwin():
            raise SkipTest('Windows PE/COFF binaries do not use RPATH')
        testdir = os.path.join(self.unit_test_dir, '10 build_rpath')
        self.init(testdir)
        self.build()
        build_rpath = get_rpath(os.path.join(self.builddir, 'prog'))
        self.assertEqual(build_rpath, '$ORIGIN/sub:/foo/bar')
        build_rpath = get_rpath(os.path.join(self.builddir, 'progcxx'))
        self.assertEqual(build_rpath, '$ORIGIN/sub:/foo/bar')
        self.install()
        install_rpath = get_rpath(os.path.join(self.installdir, 'usr/bin/prog'))
        self.assertEqual(install_rpath, '/baz')
        install_rpath = get_rpath(os.path.join(self.installdir, 'usr/bin/progcxx'))
        self.assertEqual(install_rpath, 'baz')

    @skipIfNoPkgconfig
    def test_build_rpath_pkgconfig(self):
        '''
        Test that current build artefacts (libs) are found first on the rpath,
        manually specified rpath comes second and additional rpath elements (from
        pkg-config files) come last
        '''
        if is_cygwin():
            raise SkipTest('Windows PE/COFF binaries do not use RPATH')
        testdir = os.path.join(self.unit_test_dir, '89 pkgconfig build rpath order')
        self.init(testdir, override_envvars={'PKG_CONFIG_PATH': testdir})
        self.build()
        build_rpath = get_rpath(os.path.join(self.builddir, 'prog'))
        self.assertEqual(build_rpath, '$ORIGIN/sub:/foo/bar:/foo/dummy')
        build_rpath = get_rpath(os.path.join(self.builddir, 'progcxx'))
        self.assertEqual(build_rpath, '$ORIGIN/sub:/foo/bar:/foo/dummy')
        self.install()
        install_rpath = get_rpath(os.path.join(self.installdir, 'usr/bin/prog'))
        self.assertEqual(install_rpath, '/baz:/foo/dummy')
        install_rpath = get_rpath(os.path.join(self.installdir, 'usr/bin/progcxx'))
        self.assertEqual(install_rpath, 'baz:/foo/dummy')

    @skipIfNoPkgconfig
    def test_global_rpath(self):
        if is_cygwin():
            raise SkipTest('Windows PE/COFF binaries do not use RPATH')
        if is_osx():
            raise SkipTest('Global RPATHs via LDFLAGS not yet supported on MacOS (does anybody need it?)')

        testdir = os.path.join(self.unit_test_dir, '79 global-rpath')
        oldinstalldir = self.installdir

        # Build and install an external library without DESTDIR.
        # The external library generates a .pc file without an rpath.
        yonder_dir = os.path.join(testdir, 'yonder')
        yonder_prefix = os.path.join(oldinstalldir, 'yonder')
        yonder_libdir = os.path.join(yonder_prefix, self.libdir)
        self.prefix = yonder_prefix
        self.installdir = yonder_prefix
        self.init(yonder_dir)
        self.build()
        self.install(use_destdir=False)

        # Since rpath has multiple valid formats we need to
        # test that they are all properly used.
        rpath_formats = [
            ('-Wl,-rpath=', False),
            ('-Wl,-rpath,', False),
            ('-Wl,--just-symbols=', True),
            ('-Wl,--just-symbols,', True),
            ('-Wl,-R', False),
            ('-Wl,-R,', False)
        ]
        for rpath_format, exception in rpath_formats:
            # Build an app that uses that installed library.
            # Supply the rpath to the installed library via LDFLAGS
            # (as systems like buildroot and guix are wont to do)
            # and verify install preserves that rpath.
            self.new_builddir()
            env = {'LDFLAGS': rpath_format + yonder_libdir,
                   'PKG_CONFIG_PATH': os.path.join(yonder_libdir, 'pkgconfig')}
            if exception:
                with self.assertRaises(subprocess.CalledProcessError):
                    self.init(testdir, override_envvars=env)
                continue
            self.init(testdir, override_envvars=env)
            self.build()
            self.install(use_destdir=False)
            got_rpath = get_rpath(os.path.join(yonder_prefix, 'bin/rpathified'))
            self.assertEqual(got_rpath, yonder_libdir, rpath_format)

    @skip_if_not_base_option('b_sanitize')
    def test_pch_with_address_sanitizer(self):
        if is_cygwin():
            raise SkipTest('asan not available on Cygwin')
        if is_openbsd():
            raise SkipTest('-fsanitize=address is not supported on OpenBSD')

        testdir = os.path.join(self.common_test_dir, '13 pch')
        self.init(testdir, extra_args=['-Db_sanitize=address', '-Db_lundef=false'])
        self.build()
        compdb = self.get_compdb()
        for i in compdb:
            self.assertIn("-fsanitize=address", i["command"])

    def test_cross_find_program(self):
        testdir = os.path.join(self.unit_test_dir, '11 cross prog')
        crossfile = tempfile.NamedTemporaryFile(mode='w', encoding='utf-8')
        print(os.path.join(testdir, 'some_cross_tool.py'))

        tool_path = os.path.join(testdir, 'some_cross_tool.py')

        crossfile.write(textwrap.dedent(f'''\
            [binaries]
            c = '{shutil.which('gcc' if is_sunos() else 'cc')}'
            ar = '{shutil.which('ar')}'
            strip = '{shutil.which('strip')}'
            sometool.py = ['{tool_path}']
            someothertool.py = '{tool_path}'

            [properties]

            [host_machine]
            system = 'linux'
            cpu_family = 'arm'
            cpu = 'armv7' # Not sure if correct.
            endian = 'little'
            '''))
        crossfile.flush()
        self.meson_cross_files = [crossfile.name]
        self.init(testdir)

    def test_reconfigure(self):
        testdir = os.path.join(self.unit_test_dir, '13 reconfigure')
        self.init(testdir, extra_args=['-Db_coverage=true'], default_args=False)
        self.build('reconfigure')

    def test_vala_generated_source_buildir_inside_source_tree(self):
        '''
        Test that valac outputs generated C files in the expected location when
        the builddir is a subdir of the source tree.
        '''
        if not shutil.which('valac'):
            raise SkipTest('valac not installed.')

        testdir = os.path.join(self.vala_test_dir, '8 generated sources')
        newdir = os.path.join(self.builddir, 'srctree')
        shutil.copytree(testdir, newdir)
        testdir = newdir
        # New builddir
        builddir = os.path.join(testdir, 'subdir/_build')
        os.makedirs(builddir, exist_ok=True)
        self.change_builddir(builddir)
        self.init(testdir)
        self.build()

    def test_old_gnome_module_codepaths(self):
        '''
        A lot of code in the GNOME module is conditional on the version of the
        glib tools that are installed, and breakages in the old code can slip
        by once the CI has a newer glib version. So we force the GNOME module
        to pretend that it's running on an ancient glib so the fallback code is
        also tested.
        '''
        testdir = os.path.join(self.framework_test_dir, '7 gnome')
        with mock.patch('mesonbuild.modules.gnome.GnomeModule._get_native_glib_version', mock.Mock(return_value='2.20')):
            env = {'MESON_UNIT_TEST_PRETEND_GLIB_OLD': "1"}
            self.init(testdir,
                      inprocess=True,
                      override_envvars=env)
            self.build(override_envvars=env)

    @skipIfNoPkgconfig
    def test_pkgconfig_usage(self):
        testdir1 = os.path.join(self.unit_test_dir, '27 pkgconfig usage/dependency')
        testdir2 = os.path.join(self.unit_test_dir, '27 pkgconfig usage/dependee')
        if subprocess.call([PKG_CONFIG, '--cflags', 'glib-2.0'],
                           stdout=subprocess.DEVNULL,
                           stderr=subprocess.DEVNULL) != 0:
            raise SkipTest('Glib 2.0 dependency not available.')
        with tempfile.TemporaryDirectory() as tempdirname:
            self.init(testdir1, extra_args=['--prefix=' + tempdirname, '--libdir=lib'], default_args=False)
            self.install(use_destdir=False)
            shutil.rmtree(self.builddir)
            os.mkdir(self.builddir)
            pkg_dir = os.path.join(tempdirname, 'lib/pkgconfig')
            self.assertTrue(os.path.exists(os.path.join(pkg_dir, 'libpkgdep.pc')))
            lib_dir = os.path.join(tempdirname, 'lib')
            myenv = os.environ.copy()
            myenv['PKG_CONFIG_PATH'] = pkg_dir
            # Private internal libraries must not leak out.
            pkg_out = subprocess.check_output([PKG_CONFIG, '--static', '--libs', 'libpkgdep'], env=myenv)
            self.assertNotIn(b'libpkgdep-int', pkg_out, 'Internal library leaked out.')
            # Dependencies must not leak to cflags when building only a shared library.
            pkg_out = subprocess.check_output([PKG_CONFIG, '--cflags', 'libpkgdep'], env=myenv)
            self.assertNotIn(b'glib', pkg_out, 'Internal dependency leaked to headers.')
            # Test that the result is usable.
            self.init(testdir2, override_envvars=myenv)
            self.build(override_envvars=myenv)
            myenv = os.environ.copy()
            myenv['LD_LIBRARY_PATH'] = ':'.join([lib_dir, myenv.get('LD_LIBRARY_PATH', '')])
            if is_cygwin():
                bin_dir = os.path.join(tempdirname, 'bin')
                myenv['PATH'] = bin_dir + os.pathsep + myenv['PATH']
            self.assertTrue(os.path.isdir(lib_dir))
            test_exe = os.path.join(self.builddir, 'pkguser')
            self.assertTrue(os.path.isfile(test_exe))
            subprocess.check_call(test_exe, env=myenv)

    @skipIfNoPkgconfig
    def test_pkgconfig_relative_paths(self):
        testdir = os.path.join(self.unit_test_dir, '61 pkgconfig relative paths')
        pkg_dir = os.path.join(testdir, 'pkgconfig')
        self.assertPathExists(os.path.join(pkg_dir, 'librelativepath.pc'))

        env = get_fake_env(testdir, self.builddir, self.prefix)
        env.coredata.set_options({OptionKey('pkg_config_path'): pkg_dir}, subproject='')
        kwargs = {'required': True, 'silent': True}
        relative_path_dep = PkgConfigDependency('librelativepath', env, kwargs)
        self.assertTrue(relative_path_dep.found())

        # Ensure link_args are properly quoted
        libpath = Path(self.builddir) / '../relativepath/lib'
        link_args = ['-L' + libpath.as_posix(), '-lrelativepath']
        self.assertEqual(relative_path_dep.get_link_args(), link_args)

    @skipIfNoPkgconfig
    def test_pkgconfig_duplicate_path_entries(self):
        testdir = os.path.join(self.unit_test_dir, '111 pkgconfig duplicate path entries')
        pkg_dir = os.path.join(testdir, 'pkgconfig')

        env = get_fake_env(testdir, self.builddir, self.prefix)
        env.coredata.set_options({OptionKey('pkg_config_path'): pkg_dir}, subproject='')

        # Regression test: This used to modify the value of `pkg_config_path`
        # option, adding the meson-uninstalled directory to it.
        PkgConfigInterface.setup_env({}, env, MachineChoice.HOST, uninstalled=True)

        pkg_config_path = env.coredata.options[OptionKey('pkg_config_path')].value
        self.assertEqual(pkg_config_path, [pkg_dir])

    @skipIfNoPkgconfig
    def test_pkgconfig_internal_libraries(self):
        '''
        '''
        with tempfile.TemporaryDirectory() as tempdirname:
            # build library
            testdirbase = os.path.join(self.unit_test_dir, '32 pkgconfig use libraries')
            testdirlib = os.path.join(testdirbase, 'lib')
            self.init(testdirlib, extra_args=['--prefix=' + tempdirname,
                                              '--libdir=lib',
                                              '--default-library=static'], default_args=False)
            self.build()
            self.install(use_destdir=False)

            # build user of library
            pkg_dir = os.path.join(tempdirname, 'lib/pkgconfig')
            self.new_builddir()
            self.init(os.path.join(testdirbase, 'app'),
                      override_envvars={'PKG_CONFIG_PATH': pkg_dir})
            self.build()

    @skipIfNoPkgconfig
    def test_static_archive_stripping(self):
        '''
        Check that Meson produces valid static archives with --strip enabled
        '''
        with tempfile.TemporaryDirectory() as tempdirname:
            testdirbase = os.path.join(self.unit_test_dir, '65 static archive stripping')

            # build lib
            self.new_builddir()
            testdirlib = os.path.join(testdirbase, 'lib')
            testlibprefix = os.path.join(tempdirname, 'libprefix')
            self.init(testdirlib, extra_args=['--prefix=' + testlibprefix,
                                              '--libdir=lib',
                                              '--default-library=static',
                                              '--buildtype=debug',
                                              '--strip'], default_args=False)
            self.build()
            self.install(use_destdir=False)

            # build executable (uses lib, fails if static archive has been stripped incorrectly)
            pkg_dir = os.path.join(testlibprefix, 'lib/pkgconfig')
            self.new_builddir()
            self.init(os.path.join(testdirbase, 'app'),
                      override_envvars={'PKG_CONFIG_PATH': pkg_dir})
            self.build()

    @skipIfNoPkgconfig
    def test_pkgconfig_formatting(self):
        testdir = os.path.join(self.unit_test_dir, '38 pkgconfig format')
        self.init(testdir)
        myenv = os.environ.copy()
        myenv['PKG_CONFIG_PATH'] = _prepend_pkg_config_path(self.privatedir)
        stdo = subprocess.check_output([PKG_CONFIG, '--libs-only-l', 'libsomething'], env=myenv)
        deps = [b'-lgobject-2.0', b'-lgio-2.0', b'-lglib-2.0', b'-lsomething']
        if is_windows() or is_cygwin() or is_osx() or is_openbsd():
            # On Windows, libintl is a separate library
            deps.append(b'-lintl')
        self.assertEqual(set(deps), set(stdo.split()))

    @skipIfNoPkgconfig
    @skip_if_not_language('cs')
    def test_pkgconfig_csharp_library(self):
        testdir = os.path.join(self.unit_test_dir, '49 pkgconfig csharp library')
        self.init(testdir)
        myenv = os.environ.copy()
        myenv['PKG_CONFIG_PATH'] = _prepend_pkg_config_path(self.privatedir)
        stdo = subprocess.check_output([PKG_CONFIG, '--libs', 'libsomething'], env=myenv)

        self.assertEqual("-r/usr/lib/libsomething.dll", str(stdo.decode('ascii')).strip())

    @skipIfNoPkgconfig
    def test_pkgconfig_link_order(self):
        '''
        Test that libraries are listed before their dependencies.
        '''
        testdir = os.path.join(self.unit_test_dir, '52 pkgconfig static link order')
        self.init(testdir)
        myenv = os.environ.copy()
        myenv['PKG_CONFIG_PATH'] = _prepend_pkg_config_path(self.privatedir)
        stdo = subprocess.check_output([PKG_CONFIG, '--libs', 'libsomething'], env=myenv)
        deps = stdo.split()
        self.assertLess(deps.index(b'-lsomething'), deps.index(b'-ldependency'))

    def test_deterministic_dep_order(self):
        '''
        Test that the dependencies are always listed in a deterministic order.
        '''
        testdir = os.path.join(self.unit_test_dir, '42 dep order')
        self.init(testdir)
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as bfile:
            for line in bfile:
                if 'build myexe:' in line or 'build myexe.exe:' in line:
                    self.assertIn('liblib1.a liblib2.a', line)
                    return
        raise RuntimeError('Could not find the build rule')

    def test_deterministic_rpath_order(self):
        '''
        Test that the rpaths are always listed in a deterministic order.
        '''
        if is_cygwin():
            raise SkipTest('rpath are not used on Cygwin')
        testdir = os.path.join(self.unit_test_dir, '41 rpath order')
        self.init(testdir)
        if is_osx():
            rpathre = re.compile(r'-rpath,.*/subprojects/sub1.*-rpath,.*/subprojects/sub2')
        else:
            rpathre = re.compile(r'-rpath,\$\$ORIGIN/subprojects/sub1:\$\$ORIGIN/subprojects/sub2')
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as bfile:
            for line in bfile:
                if '-rpath' in line:
                    self.assertRegex(line, rpathre)
                    return
        raise RuntimeError('Could not find the rpath')

    def test_override_with_exe_dep(self):
        '''
        Test that we produce the correct dependencies when a program is overridden with an executable.
        '''
        testdir = os.path.join(self.src_root, 'test cases', 'native', '9 override with exe')
        self.init(testdir)
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as bfile:
            for line in bfile:
                if 'main1.c:' in line or 'main2.c:' in line:
                    self.assertIn('| subprojects/sub/foobar', line)

    @skipIfNoPkgconfig
    def test_usage_external_library(self):
        '''
        Test that uninstalled usage of an external library (from the system or
        PkgConfigDependency) works. On macOS, this workflow works out of the
        box. On Linux, BSDs, Windows, etc, you need to set extra arguments such
        as LD_LIBRARY_PATH, etc, so this test is skipped.

        The system library is found with cc.find_library() and pkg-config deps.
        '''
        oldprefix = self.prefix
        # Install external library so we can find it
        testdir = os.path.join(self.unit_test_dir, '39 external, internal library rpath', 'external library')
        # install into installdir without using DESTDIR
        installdir = self.installdir
        self.prefix = installdir
        self.init(testdir)
        self.prefix = oldprefix
        self.build()
        self.install(use_destdir=False)
        ## New builddir for the consumer
        self.new_builddir()
        env = {'LIBRARY_PATH': os.path.join(installdir, self.libdir),
               'PKG_CONFIG_PATH': _prepend_pkg_config_path(os.path.join(installdir, self.libdir, 'pkgconfig'))}
        testdir = os.path.join(self.unit_test_dir, '39 external, internal library rpath', 'built library')
        # install into installdir without using DESTDIR
        self.prefix = self.installdir
        self.init(testdir, override_envvars=env)
        self.prefix = oldprefix
        self.build(override_envvars=env)
        # test uninstalled
        self.run_tests(override_envvars=env)
        if not (is_osx() or is_linux()):
            return
        # test running after installation
        self.install(use_destdir=False)
        prog = os.path.join(self.installdir, 'bin', 'prog')
        self._run([prog])
        if not is_osx():
            # Rest of the workflow only works on macOS
            return
        out = self._run(['otool', '-L', prog])
        self.assertNotIn('@rpath', out)
        ## New builddir for testing that DESTDIR is not added to install_name
        self.new_builddir()
        # install into installdir with DESTDIR
        self.init(testdir, override_envvars=env)
        self.build(override_envvars=env)
        # test running after installation
        self.install(override_envvars=env)
        prog = self.installdir + os.path.join(self.prefix, 'bin', 'prog')
        lib = self.installdir + os.path.join(self.prefix, 'lib', 'libbar_built.dylib')
        for f in prog, lib:
            out = self._run(['otool', '-L', f])
            # Ensure that the otool output does not contain self.installdir
            self.assertNotRegex(out, self.installdir + '.*dylib ')

    @skipIfNoPkgconfig
    def test_link_arg_fullname(self):
        '''
        Test for  support of -l:libfullname.a
        see: https://github.com/mesonbuild/meson/issues/9000
             https://stackoverflow.com/questions/48532868/gcc-library-option-with-a-colon-llibevent-a
        '''
        testdir = os.path.join(self.unit_test_dir, '98 link full name','libtestprovider')
        oldprefix = self.prefix
        # install into installdir without using DESTDIR
        installdir = self.installdir
        self.prefix = installdir
        self.init(testdir)
        self.prefix=oldprefix
        self.build()
        self.install(use_destdir=False)

        self.new_builddir()
        env = {'LIBRARY_PATH': os.path.join(installdir, self.libdir),
               'PKG_CONFIG_PATH': _prepend_pkg_config_path(os.path.join(installdir, self.libdir, 'pkgconfig'))}
        testdir = os.path.join(self.unit_test_dir, '98 link full name','proguser')
        self.init(testdir,override_envvars=env)

        # test for link with full path
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as bfile:
            for line in bfile:
                if 'build dprovidertest:' in line:
                    self.assertIn('/libtestprovider.a', line)

        if is_osx():
            # macOS's ld do not supports `--whole-archive`, skip build & run
            return

        self.build(override_envvars=env)

        # skip test if pkg-config is too old.
        #   before v0.28, Libs flags like -Wl will not kept in context order with -l flags.
        #   see https://gitlab.freedesktop.org/pkg-config/pkg-config/-/blob/master/NEWS
        pkgconfigver = subprocess.check_output([PKG_CONFIG, '--version'])
        if b'0.28' > pkgconfigver:
            raise SkipTest('pkg-config is too old to be correctly done this.')
        self.run_tests()

    @skipIfNoPkgconfig
    def test_usage_pkgconfig_prefixes(self):
        '''
        Build and install two external libraries, to different prefixes,
        then build and install a client program that finds them via pkgconfig,
        and verify the installed client program runs.
        '''
        oldinstalldir = self.installdir

        # Build and install both external libraries without DESTDIR
        val1dir = os.path.join(self.unit_test_dir, '74 pkgconfig prefixes', 'val1')
        val1prefix = os.path.join(oldinstalldir, 'val1')
        self.prefix = val1prefix
        self.installdir = val1prefix
        self.init(val1dir)
        self.build()
        self.install(use_destdir=False)
        self.new_builddir()

        env1 = {}
        env1['PKG_CONFIG_PATH'] = os.path.join(val1prefix, self.libdir, 'pkgconfig')
        val2dir = os.path.join(self.unit_test_dir, '74 pkgconfig prefixes', 'val2')
        val2prefix = os.path.join(oldinstalldir, 'val2')
        self.prefix = val2prefix
        self.installdir = val2prefix
        self.init(val2dir, override_envvars=env1)
        self.build()
        self.install(use_destdir=False)
        self.new_builddir()

        # Build, install, and run the client program
        env2 = {}
        env2['PKG_CONFIG_PATH'] = os.path.join(val2prefix, self.libdir, 'pkgconfig')
        testdir = os.path.join(self.unit_test_dir, '74 pkgconfig prefixes', 'client')
        testprefix = os.path.join(oldinstalldir, 'client')
        self.prefix = testprefix
        self.installdir = testprefix
        self.init(testdir, override_envvars=env2)
        self.build()
        self.install(use_destdir=False)
        prog = os.path.join(self.installdir, 'bin', 'client')
        env3 = {}
        if is_cygwin():
            env3['PATH'] = os.path.join(val1prefix, 'bin') + \
                os.pathsep + \
                os.path.join(val2prefix, 'bin') + \
                os.pathsep + os.environ['PATH']
        out = self._run([prog], override_envvars=env3).strip()
        # Expected output is val1 + val2 = 3
        self.assertEqual(out, '3')

    def install_subdir_invalid_symlinks(self, testdir, subdir_path):
        '''
        Test that installation of broken symlinks works fine.
        https://github.com/mesonbuild/meson/issues/3914
        '''
        testdir = os.path.join(self.common_test_dir, testdir)
        subdir = os.path.join(testdir, subdir_path)
        with chdir(subdir):
            # Can't distribute broken symlinks in the source tree because it breaks
            # the creation of zipapps. Create it dynamically and run the test by
            # hand.
            src = '../../nonexistent.txt'
            os.symlink(src, 'invalid-symlink.txt')
            try:
                self.init(testdir)
                self.build()
                self.install()
                install_path = subdir_path.split(os.path.sep)[-1]
                link = os.path.join(self.installdir, 'usr', 'share', install_path, 'invalid-symlink.txt')
                self.assertTrue(os.path.islink(link), msg=link)
                self.assertEqual(src, os.readlink(link))
                self.assertFalse(os.path.isfile(link), msg=link)
            finally:
                os.remove(os.path.join(subdir, 'invalid-symlink.txt'))

    def test_install_subdir_symlinks(self):
        self.install_subdir_invalid_symlinks('59 install subdir', os.path.join('sub', 'sub1'))

    def test_install_subdir_symlinks_with_default_umask(self):
        self.install_subdir_invalid_symlinks('190 install_mode', 'sub2')

    def test_install_subdir_symlinks_with_default_umask_and_mode(self):
        self.install_subdir_invalid_symlinks('190 install_mode', 'sub1')

    @skipIfNoPkgconfigDep('gmodule-2.0')
    def test_ldflag_dedup(self):
        testdir = os.path.join(self.unit_test_dir, '51 ldflagdedup')
        if is_cygwin() or is_osx():
            raise SkipTest('Not applicable on Cygwin or OSX.')
        env = get_fake_env()
        cc = detect_c_compiler(env, MachineChoice.HOST)
        linker = cc.linker
        if not linker.export_dynamic_args(env):
            raise SkipTest('Not applicable for linkers without --export-dynamic')
        self.init(testdir)
        build_ninja = os.path.join(self.builddir, 'build.ninja')
        max_count = 0
        search_term = '-Wl,--export-dynamic'
        with open(build_ninja, encoding='utf-8') as f:
            for line in f:
                max_count = max(max_count, line.count(search_term))
        self.assertEqual(max_count, 1, 'Export dynamic incorrectly deduplicated.')

    def test_compiler_libs_static_dedup(self):
        testdir = os.path.join(self.unit_test_dir, '55 dedup compiler libs')
        self.init(testdir)
        build_ninja = os.path.join(self.builddir, 'build.ninja')
        with open(build_ninja, encoding='utf-8') as f:
            lines = f.readlines()
        for lib in ('-ldl', '-lm', '-lc', '-lrt'):
            for line in lines:
                if lib not in line:
                    continue
                # Assert that
                self.assertEqual(len(line.split(lib)), 2, msg=(lib, line))

    @skipIfNoPkgconfig
    def test_noncross_options(self):
        # C_std defined in project options must be in effect also when native compiling.
        testdir = os.path.join(self.unit_test_dir, '50 noncross options')
        self.init(testdir, extra_args=['-Dpkg_config_path=' + testdir])
        compdb = self.get_compdb()
        self.assertEqual(len(compdb), 2)
        self.assertRegex(compdb[0]['command'], '-std=c99')
        self.assertRegex(compdb[1]['command'], '-std=c99')
        self.build()

    def test_identity_cross(self):
        testdir = os.path.join(self.unit_test_dir, '60 identity cross')

        constantsfile = tempfile.NamedTemporaryFile(mode='w', encoding='utf-8')
        constantsfile.write(textwrap.dedent('''\
            [constants]
            py_ext = '.py'
            '''))
        constantsfile.flush()

        nativefile = tempfile.NamedTemporaryFile(mode='w', encoding='utf-8')
        nativefile.write(textwrap.dedent('''\
            [binaries]
            c = ['{}' + py_ext]
            '''.format(os.path.join(testdir, 'build_wrapper'))))
        nativefile.flush()
        self.meson_native_files = [constantsfile.name, nativefile.name]

        crossfile = tempfile.NamedTemporaryFile(mode='w', encoding='utf-8')
        crossfile.write(textwrap.dedent('''\
            [binaries]
            c = ['{}' + py_ext]
            '''.format(os.path.join(testdir, 'host_wrapper'))))
        crossfile.flush()
        self.meson_cross_files = [constantsfile.name, crossfile.name]

        # TODO should someday be explicit about build platform only here
        self.init(testdir)

    def test_identity_cross_env(self):
        testdir = os.path.join(self.unit_test_dir, '60 identity cross')
        env = {
            'CC_FOR_BUILD': '"' + os.path.join(testdir, 'build_wrapper.py') + '"',
            'CC': '"' + os.path.join(testdir, 'host_wrapper.py') + '"',
        }
        crossfile = tempfile.NamedTemporaryFile(mode='w', encoding='utf-8')
        crossfile.write('')
        crossfile.flush()
        self.meson_cross_files = [crossfile.name]
        # TODO should someday be explicit about build platform only here
        self.init(testdir, override_envvars=env)

    @skipIfNoPkgconfig
    def test_static_link(self):
        if is_cygwin():
            raise SkipTest("Cygwin doesn't support LD_LIBRARY_PATH.")

        # Build some libraries and install them
        testdir = os.path.join(self.unit_test_dir, '66 static link/lib')
        libdir = os.path.join(self.installdir, self.libdir)
        oldprefix = self.prefix
        self.prefix = self.installdir
        self.init(testdir)
        self.install(use_destdir=False)

        # Test that installed libraries works
        self.new_builddir()
        self.prefix = oldprefix
        meson_args = [f'-Dc_link_args=-L{libdir}',
                      '--fatal-meson-warnings']
        testdir = os.path.join(self.unit_test_dir, '66 static link')
        env = {'PKG_CONFIG_LIBDIR': os.path.join(libdir, 'pkgconfig')}
        self.init(testdir, extra_args=meson_args, override_envvars=env)
        self.build()
        self.run_tests()

    def _check_ld(self, check: str, name: str, lang: str, expected: str) -> None:
        if is_sunos():
            raise SkipTest('Solaris currently cannot override the linker.')
        if not shutil.which(check):
            raise SkipTest(f'Could not find {check}.')
        envvars = [mesonbuild.envconfig.ENV_VAR_PROG_MAP[f'{lang}_ld']]

        # Also test a deprecated variable if there is one.
        if f'{lang}_ld' in mesonbuild.envconfig.DEPRECATED_ENV_PROG_MAP:
            envvars.append(
                mesonbuild.envconfig.DEPRECATED_ENV_PROG_MAP[f'{lang}_ld'])

        for envvar in envvars:
            with mock.patch.dict(os.environ, {envvar: name}):
                env = get_fake_env()
                comp = compiler_from_language(env, lang, MachineChoice.HOST)
                if isinstance(comp, (AppleClangCCompiler, AppleClangCPPCompiler,
                                     AppleClangObjCCompiler, AppleClangObjCPPCompiler)):
                    raise SkipTest('AppleClang is currently only supported with ld64')
                if lang != 'rust' and comp.use_linker_args('bfd', '') == []:
                    raise SkipTest(
                        f'Compiler {comp.id} does not support using alternative linkers')
                self.assertEqual(comp.linker.id, expected)

    def test_ld_environment_variable_bfd(self):
        self._check_ld('ld.bfd', 'bfd', 'c', 'ld.bfd')

    def test_ld_environment_variable_gold(self):
        self._check_ld('ld.gold', 'gold', 'c', 'ld.gold')

    def test_ld_environment_variable_lld(self):
        self._check_ld('ld.lld', 'lld', 'c', 'ld.lld')

    @skip_if_not_language('rust')
    @skipIfNoExecutable('ld.gold')  # need an additional check here because _check_ld checks for gcc
    def test_ld_environment_variable_rust(self):
        self._check_ld('gcc', 'gcc -fuse-ld=gold', 'rust', 'ld.gold')

    def test_ld_environment_variable_cpp(self):
        self._check_ld('ld.gold', 'gold', 'cpp', 'ld.gold')

    @skip_if_not_language('objc')
    def test_ld_environment_variable_objc(self):
        self._check_ld('ld.gold', 'gold', 'objc', 'ld.gold')

    @skip_if_not_language('objcpp')
    def test_ld_environment_variable_objcpp(self):
        self._check_ld('ld.gold', 'gold', 'objcpp', 'ld.gold')

    @skip_if_not_language('fortran')
    def test_ld_environment_variable_fortran(self):
        self._check_ld('ld.gold', 'gold', 'fortran', 'ld.gold')

    @skip_if_not_language('d')
    def test_ld_environment_variable_d(self):
        # At least for me, ldc defaults to gold, and gdc defaults to bfd, so
        # let's pick lld, which isn't the default for either (currently)
        if is_osx():
            expected = 'ld64'
        else:
            expected = 'ld.lld'
        self._check_ld('ld.lld', 'lld', 'd', expected)

    def compute_sha256(self, filename):
        with open(filename, 'rb') as f:
            return hashlib.sha256(f.read()).hexdigest()

    def test_wrap_with_file_url(self):
        testdir = os.path.join(self.unit_test_dir, '72 wrap file url')
        source_filename = os.path.join(testdir, 'subprojects', 'foo.tar.xz')
        patch_filename = os.path.join(testdir, 'subprojects', 'foo-patch.tar.xz')
        wrap_filename = os.path.join(testdir, 'subprojects', 'foo.wrap')
        source_hash = self.compute_sha256(source_filename)
        patch_hash = self.compute_sha256(patch_filename)
        wrap = textwrap.dedent("""\
            [wrap-file]
            directory = foo

            source_url = http://server.invalid/foo
            source_fallback_url = file://{}
            source_filename = foo.tar.xz
            source_hash = {}

            patch_url = http://server.invalid/foo
            patch_fallback_url = file://{}
            patch_filename = foo-patch.tar.xz
            patch_hash = {}
            """.format(source_filename, source_hash, patch_filename, patch_hash))
        with open(wrap_filename, 'w', encoding='utf-8') as f:
            f.write(wrap)
        self.init(testdir)
        self.build()
        self.run_tests()

        windows_proof_rmtree(os.path.join(testdir, 'subprojects', 'packagecache'))
        windows_proof_rmtree(os.path.join(testdir, 'subprojects', 'foo'))
        os.unlink(wrap_filename)

    def test_no_rpath_for_static(self):
        testdir = os.path.join(self.common_test_dir, '5 linkstatic')
        self.init(testdir)
        self.build()
        build_rpath = get_rpath(os.path.join(self.builddir, 'prog'))
        self.assertIsNone(build_rpath)

    def test_lookup_system_after_broken_fallback(self):
        # Just to generate libfoo.pc so we can test system dependency lookup.
        testdir = os.path.join(self.common_test_dir, '44 pkgconfig-gen')
        self.init(testdir)
        privatedir = self.privatedir

        # Write test project where the first dependency() returns not-found
        # because 'broken' subproject does not exit, but that should not prevent
        # the 2nd dependency() to lookup on system.
        self.new_builddir()
        with tempfile.TemporaryDirectory() as d:
            with open(os.path.join(d, 'meson.build'), 'w', encoding='utf-8') as f:
                f.write(textwrap.dedent('''\
                    project('test')
                    dependency('notfound', fallback: 'broken', required: false)
                    dependency('libfoo', fallback: 'broken', required: true)
                    '''))
            self.init(d, override_envvars={'PKG_CONFIG_LIBDIR': privatedir})

    def test_as_link_whole(self):
        testdir = os.path.join(self.unit_test_dir, '76 as link whole')
        self.init(testdir)
        with open(os.path.join(self.privatedir, 'bar1.pc'), encoding='utf-8') as f:
            content = f.read()
            self.assertIn('-lfoo', content)
        with open(os.path.join(self.privatedir, 'bar2.pc'), encoding='utf-8') as f:
            content = f.read()
            self.assertNotIn('-lfoo', content)

    def test_prelinking(self):
        # Prelinking currently only works on recently new GNU toolchains.
        # Skip everything else. When support for other toolchains is added,
        # remove limitations as necessary.
        if is_osx():
            raise SkipTest('Prelinking not supported on Darwin.')
        if 'clang' in os.environ.get('CC', 'dummy'):
            raise SkipTest('Prelinking not supported with Clang.')
        testdir = os.path.join(self.unit_test_dir, '86 prelinking')
        env = get_fake_env(testdir, self.builddir, self.prefix)
        cc = detect_c_compiler(env, MachineChoice.HOST)
        if cc.id == "gcc" and not version_compare(cc.version, '>=9'):
            raise SkipTest('Prelinking not supported with gcc 8 or older.')
        self.init(testdir)
        self.build()
        outlib = os.path.join(self.builddir, 'libprelinked.a')
        ar = shutil.which('ar')
        self.assertPathExists(outlib)
        self.assertIsNotNone(ar)
        p = subprocess.run([ar, 't', outlib],
                           stdout=subprocess.PIPE,
                           stderr=subprocess.DEVNULL,
                           text=True, timeout=1)
        obj_files = p.stdout.strip().split('\n')
        self.assertEqual(len(obj_files), 1)
        self.assertTrue(obj_files[0].endswith('-prelink.o'))

    def do_one_test_with_nativefile(self, testdir, args):
        testdir = os.path.join(self.common_test_dir, testdir)
        with tempfile.TemporaryDirectory() as d:
            p = Path(d) / 'nativefile'
            with p.open('wt', encoding='utf-8') as f:
                f.write(f'''[binaries]
                    c = {args}
                    ''')
            self.init(testdir, extra_args=['--native-file=' + str(p)])
            self.build()

    def test_cmake_multilib(self):
        '''
        Test that the cmake module handles multilib paths correctly.
        '''
        # Verify that "gcc -m32" works
        try:
            self.do_one_test_with_nativefile('1 trivial', "['gcc', '-m32']")
        except subprocess.CalledProcessError as e:
            raise SkipTest('Not GCC, or GCC does not have the -m32 option')
        self.wipe()

        # Verify that cmake works
        try:
            self.do_one_test_with_nativefile('../cmake/1 basic', "['gcc']")
        except subprocess.CalledProcessError as e:
            raise SkipTest('Could not build basic cmake project')
        self.wipe()

        # If so, we can test that cmake works with "gcc -m32"
        self.do_one_test_with_nativefile('../cmake/1 basic', "['gcc', '-m32']")

    @skipUnless(is_linux() or is_osx(), 'Test only applicable to Linux and macOS')
    def test_install_strip(self):
        testdir = os.path.join(self.unit_test_dir, '104 strip')
        self.init(testdir)
        self.build()

        destdir = self.installdir + self.prefix
        if is_linux():
            lib = os.path.join(destdir, self.libdir, 'liba.so')
        else:
            lib = os.path.join(destdir, self.libdir, 'liba.dylib')
        install_cmd = self.meson_command + ['install', '--destdir', self.installdir]

        # Check we have debug symbols by default
        self._run(install_cmd, workdir=self.builddir)
        if is_linux():
            # file can detect stripped libraries on linux
            stdout = self._run(['file', '-b', lib])
            self.assertIn('not stripped', stdout)
        else:
            # on macOS we need to query dsymutil instead.
            # Alternatively, check if __dyld_private is defined
            # in the output of nm liba.dylib, but that is not
            # 100% reliable, it needs linking to an external library
            stdout = self._run(['dsymutil', '--dump-debug-map', lib])
            self.assertIn('symbols:', stdout)

        # Check debug symbols got removed with --strip
        self._run(install_cmd + ['--strip'], workdir=self.builddir)
        if is_linux():
            stdout = self._run(['file', '-b', lib])
            self.assertNotIn('not stripped', stdout)
        else:
            stdout = self._run(['dsymutil', '--dump-debug-map', lib])
            self.assertNotIn('symbols:', stdout)

    def test_isystem_default_removal_with_symlink(self):
        env = get_fake_env()
        cpp = detect_cpp_compiler(env, MachineChoice.HOST)
        default_dirs = cpp.get_default_include_dirs()
        default_symlinks = []
        with tempfile.TemporaryDirectory() as tmpdir:
            for i in range(len(default_dirs)):
                symlink = f'{tmpdir}/default_dir{i}'
                default_symlinks.append(symlink)
                os.symlink(default_dirs[i], symlink)
            self.assertFalse(cpp.compiler_args([f'-isystem{symlink}' for symlink in default_symlinks]).to_native())

    def test_freezing(self):
        testdir = os.path.join(self.unit_test_dir, '110 freeze')
        self.init(testdir)
        self.build()
        with self.assertRaises(subprocess.CalledProcessError) as e:
            self.run_tests()
        self.assertNotIn('Traceback', e.exception.output)

    @skipUnless(is_linux(), "Ninja file differs on different platforms")
    def test_complex_link_cases(self):
        testdir = os.path.join(self.unit_test_dir, '114 complex link cases')
        self.init(testdir)
        self.build()
        with open(os.path.join(self.builddir, 'build.ninja'), encoding='utf-8') as f:
            content = f.read()
        # Verify link dependencies, see comments in meson.build.
        self.assertIn('build libt1-s3.a: STATIC_LINKER libt1-s2.a.p/s2.c.o libt1-s3.a.p/s3.c.o\n', content)
        self.assertIn('build t1-e1: c_LINKER t1-e1.p/main.c.o | libt1-s1.a libt1-s3.a\n', content)
        self.assertIn('build libt2-s3.a: STATIC_LINKER libt2-s2.a.p/s2.c.o libt2-s1.a.p/s1.c.o libt2-s3.a.p/s3.c.o\n', content)
        self.assertIn('build t2-e1: c_LINKER t2-e1.p/main.c.o | libt2-s3.a\n', content)
        self.assertIn('build t3-e1: c_LINKER t3-e1.p/main.c.o | libt3-s3.so.p/libt3-s3.so.symbols\n', content)
        self.assertIn('build t4-e1: c_LINKER t4-e1.p/main.c.o | libt4-s2.so.p/libt4-s2.so.symbols libt4-s3.a\n', content)
        self.assertIn('build t5-e1: c_LINKER t5-e1.p/main.c.o | libt5-s1.so.p/libt5-s1.so.symbols libt5-s3.a\n', content)
        self.assertIn('build t6-e1: c_LINKER t6-e1.p/main.c.o | libt6-s2.a libt6-s3.a\n', content)
        self.assertIn('build t7-e1: c_LINKER t7-e1.p/main.c.o | libt7-s3.a\n', content)
        self.assertIn('build t8-e1: c_LINKER t8-e1.p/main.c.o | libt8-s1.a libt8-s2.a libt8-s3.a\n', content)
        self.assertIn('build t9-e1: c_LINKER t9-e1.p/main.c.o | libt9-s1.a libt9-s2.a libt9-s3.a\n', content)
        self.assertIn('build t12-e1: c_LINKER t12-e1.p/main.c.o | libt12-s1.a libt12-s2.a libt12-s3.a\n', content)
        self.assertIn('build t13-e1: c_LINKER t13-e1.p/main.c.o | libt12-s1.a libt13-s3.a\n', content)