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# Copyright 2013-2019 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This file contains the detection logic for external dependencies useful for
# development purposes, such as testing, debugging, etc..
import glob
import os
import re
import typing as T
from .. import mesonlib, mlog
from ..mesonlib import version_compare, stringlistify, extract_as_list, MachineChoice
from ..environment import get_llvm_tool_names
from .base import (
DependencyException, DependencyMethods, ExternalDependency, PkgConfigDependency,
strip_system_libdirs, ConfigToolDependency, CMakeDependency, DependencyFactory,
)
from .misc import threads_factory
if T.TYPE_CHECKING:
from .. environment import Environment
def get_shared_library_suffix(environment, for_machine: MachineChoice):
"""This is only guaranteed to work for languages that compile to machine
code, not for languages like C# that use a bytecode and always end in .dll
"""
m = environment.machines[for_machine]
if m.is_windows():
return '.dll'
elif m.is_darwin():
return '.dylib'
return '.so'
class GTestDependencySystem(ExternalDependency):
def __init__(self, name: str, environment, kwargs):
super().__init__(name, environment, kwargs, language='cpp')
self.main = kwargs.get('main', False)
self.src_dirs = ['/usr/src/gtest/src', '/usr/src/googletest/googletest/src']
if not self._add_sub_dependency(threads_factory(environment, self.for_machine, {})):
self.is_found = False
return
self.detect()
def detect(self):
gtest_detect = self.clib_compiler.find_library("gtest", self.env, [])
gtest_main_detect = self.clib_compiler.find_library("gtest_main", self.env, [])
if gtest_detect and (not self.main or gtest_main_detect):
self.is_found = True
self.compile_args = []
self.link_args = gtest_detect
if self.main:
self.link_args += gtest_main_detect
self.sources = []
self.prebuilt = True
elif self.detect_srcdir():
self.is_found = True
self.compile_args = ['-I' + d for d in self.src_include_dirs]
self.link_args = []
if self.main:
self.sources = [self.all_src, self.main_src]
else:
self.sources = [self.all_src]
self.prebuilt = False
else:
self.is_found = False
def detect_srcdir(self):
for s in self.src_dirs:
if os.path.exists(s):
self.src_dir = s
self.all_src = mesonlib.File.from_absolute_file(
os.path.join(self.src_dir, 'gtest-all.cc'))
self.main_src = mesonlib.File.from_absolute_file(
os.path.join(self.src_dir, 'gtest_main.cc'))
self.src_include_dirs = [os.path.normpath(os.path.join(self.src_dir, '..')),
os.path.normpath(os.path.join(self.src_dir, '../include')),
]
return True
return False
def log_info(self):
if self.prebuilt:
return 'prebuilt'
else:
return 'building self'
def log_tried(self):
return 'system'
@staticmethod
def get_methods():
return [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM]
class GTestDependencyPC(PkgConfigDependency):
def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
assert name == 'gtest'
if kwargs.get('main'):
name = 'gtest_main'
super().__init__(name, environment, kwargs)
class GMockDependencySystem(ExternalDependency):
def __init__(self, name: str, environment, kwargs):
super().__init__(name, environment, kwargs, language='cpp')
self.main = kwargs.get('main', False)
if not self._add_sub_dependency(threads_factory(environment, self.for_machine, {})):
self.is_found = False
return
# If we are getting main() from GMock, we definitely
# want to avoid linking in main() from GTest
gtest_kwargs = kwargs.copy()
if self.main:
gtest_kwargs['main'] = False
# GMock without GTest is pretty much useless
# this also mimics the structure given in WrapDB,
# where GMock always pulls in GTest
found = self._add_sub_dependency(gtest_factory(environment, self.for_machine, gtest_kwargs))
if not found:
self.is_found = False
return
# GMock may be a library or just source.
# Work with both.
gmock_detect = self.clib_compiler.find_library("gmock", self.env, [])
gmock_main_detect = self.clib_compiler.find_library("gmock_main", self.env, [])
if gmock_detect and (not self.main or gmock_main_detect):
self.is_found = True
self.link_args += gmock_detect
if self.main:
self.link_args += gmock_main_detect
self.prebuilt = True
return
for d in ['/usr/src/googletest/googlemock/src', '/usr/src/gmock/src', '/usr/src/gmock']:
if os.path.exists(d):
self.is_found = True
# Yes, we need both because there are multiple
# versions of gmock that do different things.
d2 = os.path.normpath(os.path.join(d, '..'))
self.compile_args += ['-I' + d, '-I' + d2, '-I' + os.path.join(d2, 'include')]
all_src = mesonlib.File.from_absolute_file(os.path.join(d, 'gmock-all.cc'))
main_src = mesonlib.File.from_absolute_file(os.path.join(d, 'gmock_main.cc'))
if self.main:
self.sources += [all_src, main_src]
else:
self.sources += [all_src]
self.prebuilt = False
return
self.is_found = False
def log_info(self):
if self.prebuilt:
return 'prebuilt'
else:
return 'building self'
def log_tried(self):
return 'system'
@staticmethod
def get_methods():
return [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM]
class GMockDependencyPC(PkgConfigDependency):
def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
assert name == 'gmock'
if kwargs.get('main'):
name = 'gmock_main'
super().__init__(name, environment, kwargs)
class LLVMDependencyConfigTool(ConfigToolDependency):
"""
LLVM uses a special tool, llvm-config, which has arguments for getting
c args, cxx args, and ldargs as well as version.
"""
tool_name = 'llvm-config'
__cpp_blacklist = {'-DNDEBUG'}
def __init__(self, name: str, environment, kwargs):
self.tools = get_llvm_tool_names('llvm-config')
# Fedora starting with Fedora 30 adds a suffix of the number
# of bits in the isa that llvm targets, for example, on x86_64
# and aarch64 the name will be llvm-config-64, on x86 and arm
# it will be llvm-config-32.
if environment.machines[self.get_for_machine_from_kwargs(kwargs)].is_64_bit:
self.tools.append('llvm-config-64')
else:
self.tools.append('llvm-config-32')
# It's necessary for LLVM <= 3.8 to use the C++ linker. For 3.9 and 4.0
# the C linker works fine if only using the C API.
super().__init__(name, environment, kwargs, language='cpp')
self.provided_modules = []
self.required_modules = set()
self.module_details = []
if not self.is_found:
return
self.provided_modules = self.get_config_value(['--components'], 'modules')
modules = stringlistify(extract_as_list(kwargs, 'modules'))
self.check_components(modules)
opt_modules = stringlistify(extract_as_list(kwargs, 'optional_modules'))
self.check_components(opt_modules, required=False)
cargs = set(self.get_config_value(['--cppflags'], 'compile_args'))
self.compile_args = list(cargs.difference(self.__cpp_blacklist))
if version_compare(self.version, '>= 3.9'):
self._set_new_link_args(environment)
else:
self._set_old_link_args()
self.link_args = strip_system_libdirs(environment, self.for_machine, self.link_args)
self.link_args = self.__fix_bogus_link_args(self.link_args)
if not self._add_sub_dependency(threads_factory(environment, self.for_machine, {})):
self.is_found = False
return
def __fix_bogus_link_args(self, args):
"""This function attempts to fix bogus link arguments that llvm-config
generates.
Currently it works around the following:
- FreeBSD: when statically linking -l/usr/lib/libexecinfo.so will
be generated, strip the -l in cases like this.
- Windows: We may get -LIBPATH:... which is later interpreted as
"-L IBPATH:...", if we're using an msvc like compilers convert
that to "/LIBPATH", otherwise to "-L ..."
"""
cpp = self.env.coredata.compilers[self.for_machine]['cpp']
new_args = []
for arg in args:
if arg.startswith('-l') and arg.endswith('.so'):
new_args.append(arg.lstrip('-l'))
elif arg.startswith('-LIBPATH:'):
new_args.extend(cpp.get_linker_search_args(arg.lstrip('-LIBPATH:')))
else:
new_args.append(arg)
return new_args
def __check_libfiles(self, shared):
"""Use llvm-config's --libfiles to check if libraries exist."""
mode = '--link-shared' if shared else '--link-static'
# Set self.required to true to force an exception in get_config_value
# if the returncode != 0
restore = self.required
self.required = True
try:
# It doesn't matter what the stage is, the caller needs to catch
# the exception anyway.
self.link_args = self.get_config_value(['--libfiles', mode], '')
finally:
self.required = restore
def _set_new_link_args(self, environment):
"""How to set linker args for LLVM versions >= 3.9"""
mode = self.get_config_value(['--shared-mode'], 'link_args')[0]
if not self.static and mode == 'static':
# If llvm is configured with LLVM_BUILD_LLVM_DYLIB but not with
# LLVM_LINK_LLVM_DYLIB and not LLVM_BUILD_SHARED_LIBS (which
# upstream doesn't recommend using), then llvm-config will lie to
# you about how to do shared-linking. It wants to link to a a bunch
# of individual shared libs (which don't exist because llvm wasn't
# built with LLVM_BUILD_SHARED_LIBS.
#
# Therefore, we'll try to get the libfiles, if the return code is 0
# or we get an empty list, then we'll try to build a working
# configuration by hand.
try:
self.__check_libfiles(True)
except DependencyException:
lib_ext = get_shared_library_suffix(environment, self.for_machine)
libdir = self.get_config_value(['--libdir'], 'link_args')[0]
# Sort for reproducibility
matches = sorted(glob.iglob(os.path.join(libdir, 'libLLVM*{}'.format(lib_ext))))
if not matches:
if self.required:
raise
self.is_found = False
return
self.link_args = self.get_config_value(['--ldflags'], 'link_args')
libname = os.path.basename(matches[0]).rstrip(lib_ext).lstrip('lib')
self.link_args.append('-l{}'.format(libname))
return
elif self.static and mode == 'shared':
# If, however LLVM_BUILD_SHARED_LIBS is true # (*cough* gentoo *cough*)
# then this is correct. Building with LLVM_BUILD_SHARED_LIBS has a side
# effect, it stops the generation of static archives. Therefore we need
# to check for that and error out on static if this is the case
try:
self.__check_libfiles(False)
except DependencyException:
if self.required:
raise
self.is_found = False
return
link_args = ['--link-static', '--system-libs'] if self.static else ['--link-shared']
self.link_args = self.get_config_value(
['--libs', '--ldflags'] + link_args + list(self.required_modules),
'link_args')
def _set_old_link_args(self):
"""Setting linker args for older versions of llvm.
Old versions of LLVM bring an extra level of insanity with them.
llvm-config will provide the correct arguments for static linking, but
not for shared-linnking, we have to figure those out ourselves, because
of course we do.
"""
if self.static:
self.link_args = self.get_config_value(
['--libs', '--ldflags', '--system-libs'] + list(self.required_modules),
'link_args')
else:
# llvm-config will provide arguments for static linking, so we get
# to figure out for ourselves what to link with. We'll do that by
# checking in the directory provided by --libdir for a library
# called libLLVM-<ver>.(so|dylib|dll)
libdir = self.get_config_value(['--libdir'], 'link_args')[0]
expected_name = 'libLLVM-{}'.format(self.version)
re_name = re.compile(r'{}.(so|dll|dylib)$'.format(expected_name))
for file_ in os.listdir(libdir):
if re_name.match(file_):
self.link_args = ['-L{}'.format(libdir),
'-l{}'.format(os.path.splitext(file_.lstrip('lib'))[0])]
break
else:
raise DependencyException(
'Could not find a dynamically linkable library for LLVM.')
def check_components(self, modules, required=True):
"""Check for llvm components (modules in meson terms).
The required option is whether the module is required, not whether LLVM
is required.
"""
for mod in sorted(set(modules)):
status = ''
if mod not in self.provided_modules:
if required:
self.is_found = False
if self.required:
raise DependencyException(
'Could not find required LLVM Component: {}'.format(mod))
status = '(missing)'
else:
status = '(missing but optional)'
else:
self.required_modules.add(mod)
self.module_details.append(mod + status)
def log_details(self):
if self.module_details:
return 'modules: ' + ', '.join(self.module_details)
return ''
class LLVMDependencyCMake(CMakeDependency):
def __init__(self, name: str, env, kwargs):
self.llvm_modules = stringlistify(extract_as_list(kwargs, 'modules'))
self.llvm_opt_modules = stringlistify(extract_as_list(kwargs, 'optional_modules'))
super().__init__(name, env, kwargs, language='cpp')
# Cmake will always create a statically linked binary, so don't use
# cmake if dynamic is required
if not self.static:
self.is_found = False
return
if self.traceparser is None:
return
# Extract extra include directories and definitions
inc_dirs = self.traceparser.get_cmake_var('PACKAGE_INCLUDE_DIRS')
defs = self.traceparser.get_cmake_var('PACKAGE_DEFINITIONS')
temp = ['-I' + x for x in inc_dirs] + defs
self.compile_args += [x for x in temp if x not in self.compile_args]
if not self._add_sub_dependency(threads_factory(env, self.for_machine, {})):
self.is_found = False
return
def _main_cmake_file(self) -> str:
# Use a custom CMakeLists.txt for LLVM
return 'CMakeListsLLVM.txt'
def _extra_cmake_opts(self) -> T.List[str]:
return ['-DLLVM_MESON_MODULES={}'.format(';'.join(self.llvm_modules + self.llvm_opt_modules))]
def _map_module_list(self, modules: T.List[T.Tuple[str, bool]]) -> T.List[T.Tuple[str, bool]]:
res = []
for mod, required in modules:
cm_targets = self.traceparser.get_cmake_var('MESON_LLVM_TARGETS_{}'.format(mod))
if not cm_targets:
if required:
raise self._gen_exception('LLVM module {} was not found'.format(mod))
else:
mlog.warning('Optional LLVM module', mlog.bold(mod), 'was not found')
continue
for i in cm_targets:
res += [(i, required)]
return res
def _original_module_name(self, module: str) -> str:
orig_name = self.traceparser.get_cmake_var('MESON_TARGET_TO_LLVM_{}'.format(module))
if orig_name:
return orig_name[0]
return module
class ValgrindDependency(PkgConfigDependency):
'''
Consumers of Valgrind usually only need the compile args and do not want to
link to its (static) libraries.
'''
def __init__(self, env, kwargs):
super().__init__('valgrind', env, kwargs)
def get_link_args(self, **kwargs):
return []
llvm_factory = DependencyFactory(
'LLVM',
[DependencyMethods.CMAKE, DependencyMethods.CONFIG_TOOL],
cmake_class=LLVMDependencyCMake,
configtool_class=LLVMDependencyConfigTool,
)
gtest_factory = DependencyFactory(
'gtest',
[DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM],
pkgconfig_class=GTestDependencyPC,
system_class=GTestDependencySystem,
)
gmock_factory = DependencyFactory(
'gmock',
[DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM],
pkgconfig_class=GMockDependencyPC,
system_class=GMockDependencySystem,
)