mirror of
https://github.com/mozilla/gecko-dev.git
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151 lines
4.6 KiB
Python
151 lines
4.6 KiB
Python
# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
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# vim: set filetype=python:
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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@template
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def check_clock_monotonic_support(lib=None, when=None):
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check_msg = "for clock_gettime(CLOCK_MONOTONIC)"
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flags = []
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if lib is not None:
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check_msg += f" in {lib}"
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flags.append(f"-l{lib}")
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check_when = building_with_gnu_compatible_cc
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if when is not None:
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check_when &= when
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return try_link(
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includes=["time.h"],
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body="struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);",
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check_msg=check_msg,
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flags=flags,
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when=check_when,
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)
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have_raw_clock_monotonic_support = check_clock_monotonic_support()
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have_rt_clock_monotonic_support = check_clock_monotonic_support(
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lib="rt", when=~have_raw_clock_monotonic_support
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)
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set_define(
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"HAVE_CLOCK_MONOTONIC",
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have_raw_clock_monotonic_support | have_rt_clock_monotonic_support,
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)
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set_config(
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"HAVE_CLOCK_MONOTONIC",
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have_raw_clock_monotonic_support | have_rt_clock_monotonic_support,
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)
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set_config("REALTIME_LIBS", ["-lrt"], when=have_rt_clock_monotonic_support)
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have_res_ninit = try_link(
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includes=["sys/types.h", "netinet/in.h", "arpa/nameser.h", "resolv.h"],
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body="int foo = res_ninit(&_res);",
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check_msg="for res_ninit()",
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flags=depends(when=building_linux)(["-D_BSD_SOURCE=1"]),
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when=building_with_gnu_compatible_cc & ~target_is_netbsd & ~target_is_openbsd,
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)
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set_define("HAVE_RES_NINIT", have_res_ninit)
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# We don't want to link with libdl even if it's present on OS X, since
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# it's not used and not part of the default installation.
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# We don't want to link against libm or libpthread on Darwin since
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# they both are just symlinks to libSystem and explicitly linking
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# against libSystem causes issues when debugging (see bug 299601).
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with only_when(building_with_gnu_compatible_cc):
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dladdr_check = check_symbol_in_libs([None, "dl"], symbol="dladdr")
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set_define(
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"HAVE_DLADDR", depends(dladdr_check)(lambda check: "1" if check.found else "0")
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)
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with only_when(~target_is_darwin):
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check_header("dlfcn.h")
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dlopen_check = check_symbol_in_libs(["dl", None], symbol="dlopen")
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set_config(
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"DL_LIBS", ["-ldl"], when=depends(dlopen_check)(lambda check: check.lib)
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)
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set_config(
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"C_R_LIBS",
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["-lc_r"],
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when=check_symbol_in_lib(
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"c_r", symbol="gethostbyname_r", when=building_with_gnu_compatible_cc
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),
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)
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set_config(
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"SOCKET_LIBS",
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["-lsocket"],
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when=check_symbol_in_lib(
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"socket", symbol="socket", when=building_with_gnu_compatible_cc
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),
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)
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moz_use_pthreads = (
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target_is_darwin
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| check_symbol_in_libs(
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[None, "pthread"],
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symbol="pthread_create",
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when=building_with_gnu_compatible_cc & ~target_is_darwin,
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).found
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)
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with only_when(moz_use_pthreads):
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check_header("pthread.h")
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pthread_flags = dependable(lambda: namespace(cflags=[]))
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(have_pthread_cflag,) = check_and_add_flags(
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"-pthread",
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pthread_flags,
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["-Werror", "-pthread"],
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compiler=c_compiler,
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)
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@depends(pthread_flags, compilation_flags)
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def add_pthread_linker_flags(pthread_flags, compilation_flags):
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# Handle compilation flags update
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compilation_flags.cflags.extend(pthread_flags.cflags)
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compilation_flags.cxxflags.extend(pthread_flags.cflags)
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set_config("MOZ_USE_PTHREADS", True)
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with only_when(building_with_gnu_compatible_cc):
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@template
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def check_std_atomic_requirements(flag=None, when=None):
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return try_link(
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includes=["cstdint", "atomic"],
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body="std::atomic<uint64_t> foo; foo = 1;",
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flags=flag or [],
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when=when,
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)
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is_libatomic_optional = check_std_atomic_requirements()
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is_libatomic_required = check_std_atomic_requirements(
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flag="-latomic", when=~is_libatomic_optional
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)
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@depends(is_libatomic_optional, is_libatomic_required)
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@checking("whether 64-bits std::atomic requires -latomic")
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def checking_needs_libatomic(is_libatomic_optional, is_libatomic_required):
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if is_libatomic_optional:
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return False
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if is_libatomic_required:
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return True
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return "do not know; assuming no"
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set_config(
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"LIBATOMIC_LIBS",
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["-latomic"],
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when=depends(checking_needs_libatomic)(lambda c: c is True),
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)
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