mozilla
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gecko-dev
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gecko-dev/build/moz.configure/toolchain.configure

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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# Code optimization
# ==============================================================
option("--disable-optimize", nargs="?", help="Disable optimizations via compiler flags")
@depends("--enable-optimize")
def moz_optimize(option):
flags = None
if len(option):
val = "2"
flags = option[0]
elif option:
val = "1"
else:
val = None
return namespace(
optimize=val,
flags=flags,
)
set_config("MOZ_OPTIMIZE", moz_optimize.optimize)
add_old_configure_assignment("MOZ_OPTIMIZE", moz_optimize.optimize)
add_old_configure_assignment("MOZ_CONFIGURE_OPTIMIZE_FLAGS", moz_optimize.flags)
# Android NDK
# ==============================================================
@depends("--disable-compile-environment", target)
def compiling_android(compile_env, target):
return compile_env and target.os == "Android"
include("android-ndk.configure", when=compiling_android)
with only_when(target_is_osx):
# MacOS deployment target version
# ==============================================================
# This needs to happen before any compilation test is done.
option(
"--enable-macos-target",
env="MACOSX_DEPLOYMENT_TARGET",
nargs=1,
default=depends(target)(lambda t: "11.0" if t.cpu == "aarch64" else "10.12"),
help="Set the minimum MacOS version needed at runtime{|}",
)
@depends("--enable-macos-target")
@imports(_from="os", _import="environ")
def macos_target(value):
if value:
# Ensure every compiler process we spawn uses this value.
environ["MACOSX_DEPLOYMENT_TARGET"] = value[0]
return value[0]
set_config("MACOSX_DEPLOYMENT_TARGET", macos_target)
add_old_configure_assignment("MACOSX_DEPLOYMENT_TARGET", macos_target)
@depends(host)
def host_is_osx(host):
if host.os == "OSX":
return True
with only_when(host_is_osx | target_is_osx):
# MacOS SDK
# =========
option(
"--with-macos-sdk",
env="MACOS_SDK_DIR",
nargs=1,
help="Location of platform SDK to use",
)
@depends("--with-macos-sdk", host)
@imports(_from="__builtin__", _import="open")
@imports(_from="os.path", _import="isdir")
@imports("plistlib")
def macos_sdk(sdk, host):
# When we change the SDK we build with, please update the manual SDK
# installation docs:
# https://firefox-source-docs.mozilla.org/setup/macos_build.html#macos-sdk-is-unsupported
sdk_min_version = Version("10.12")
sdk_max_version = Version("11.1")
if sdk:
sdk = sdk[0]
elif host.os == "OSX":
sdk = check_cmd_output(
"xcrun", "--show-sdk-path", onerror=lambda: ""
).rstrip()
if not sdk:
die(
"Could not find the macOS SDK. Please use --with-macos-sdk to give "
"the path to a macOS SDK."
)
else:
die(
"Need a macOS SDK when targeting macOS. Please use --with-macos-sdk "
"to give the path to a macOS SDK."
)
if not isdir(sdk):
die(
"SDK not found in %s. When using --with-macos-sdk, you must specify a "
"valid SDK. SDKs are installed when the optional cross-development "
"tools are selected during the Xcode/Developer Tools installation."
% sdk
)
with open(os.path.join(sdk, "SDKSettings.plist"), "rb") as plist:
obj = plistlib.load(plist)
if not obj:
die("Error parsing SDKSettings.plist in the SDK directory: %s" % sdk)
if "Version" not in obj:
die(
"Error finding Version information in SDKSettings.plist from the SDK: %s"
% sdk
)
version = Version(obj["Version"])
sdk_installation_docs_url = "https://firefox-source-docs.mozilla.org/setup/macos_build.html#macos-sdk-is-unsupported"
if version < sdk_min_version:
die(
'SDK version "%s" is too old. Please upgrade to at least %s. Try '
"updating your system Xcode. If that's not sufficient, see the manual "
"SDK installation docs: %s"
% (version, sdk_min_version, sdk_installation_docs_url)
)
if version > sdk_max_version:
die(
'SDK version "%s" is unsupported. Please downgrade to version '
"%s. See the manual SDK installation docs: %s"
% (version, sdk_max_version, sdk_installation_docs_url)
)
return sdk
set_config("MACOS_SDK_DIR", macos_sdk)
with only_when(target_is_osx):
with only_when(cross_compiling):
option(
"--with-macos-private-frameworks",
env="MACOS_PRIVATE_FRAMEWORKS_DIR",
nargs=1,
help="Location of private frameworks to use",
)
@depends_if("--with-macos-private-frameworks")
@imports(_from="os.path", _import="isdir")
def macos_private_frameworks(value):
if value and not isdir(value[0]):
die(
"PrivateFrameworks not found not found in %s. When using "
"--with-macos-private-frameworks, you must specify a valid "
"directory",
value[0],
)
return value[0]
@depends(macos_private_frameworks, macos_sdk)
def macos_private_frameworks(value, sdk):
if value:
return value
return os.path.join(sdk or "/", "System/Library/PrivateFrameworks")
set_config("MACOS_PRIVATE_FRAMEWORKS_DIR", macos_private_frameworks)
# GC rooting and hazard analysis.
# ==============================================================
option(env="MOZ_HAZARD", help="Build for the GC rooting hazard analysis")
@depends("MOZ_HAZARD")
def hazard_analysis(value):
if value:
return True
set_config("MOZ_HAZARD", hazard_analysis)
# Cross-compilation related things.
# ==============================================================
option(
"--with-toolchain-prefix",
env="TOOLCHAIN_PREFIX",
nargs=1,
help="Prefix for the target toolchain",
)
@depends("--with-toolchain-prefix", host, target, cross_compiling)
def toolchain_prefix(value, host, target, cross_compiling):
if value:
return tuple(value)
# We don't want a toolchain prefix by default when building on mac for mac.
if cross_compiling and not (target.os == "OSX" and host.os == "OSX"):
return ("%s-" % target.toolchain, "%s-" % target.alias)
@depends(toolchain_prefix, target)
def first_toolchain_prefix(toolchain_prefix, target):
# Pass TOOLCHAIN_PREFIX down to the build system if it was given from the
# command line/environment (in which case there's only one value in the tuple),
# or when cross-compiling for Android or OSX.
if toolchain_prefix and (
target.os in ("Android", "OSX") or len(toolchain_prefix) == 1
):
return toolchain_prefix[0]
set_config("TOOLCHAIN_PREFIX", first_toolchain_prefix)
add_old_configure_assignment("TOOLCHAIN_PREFIX", first_toolchain_prefix)
# Compilers
# ==============================================================
include("compilers-util.configure")
def try_preprocess(compiler, language, source, onerror=None):
return try_invoke_compiler(compiler, language, source, ["-E"], onerror)
@imports(_from="mozbuild.configure.constants", _import="CompilerType")
@imports(_from="mozbuild.configure.constants", _import="CPU_preprocessor_checks")
@imports(_from="mozbuild.configure.constants", _import="kernel_preprocessor_checks")
@imports(_from="mozbuild.configure.constants", _import="OS_preprocessor_checks")
@imports(_from="six", _import="iteritems")
@imports(_from="textwrap", _import="dedent")
@imports(_from="__builtin__", _import="Exception")
def get_compiler_info(compiler, language):
"""Returns information about the given `compiler` (command line in the
form of a list or tuple), in the given `language`.
The returned information includes:
- the compiler type (clang-cl, clang or gcc)
- the compiler version
- the compiler supported language
- the compiler supported language version
"""
# Xcode clang versions are different from the underlying llvm version (they
# instead are aligned with the Xcode version). Fortunately, we can tell
# apart plain clang from Xcode clang, and convert the Xcode clang version
# into the more or less corresponding plain clang version.
check = dedent(
"""\
#if defined(_MSC_VER) && defined(__clang__) && defined(_MT)
%COMPILER "clang-cl"
%VERSION __clang_major__.__clang_minor__.__clang_patchlevel__
#elif defined(__clang__)
%COMPILER "clang"
%VERSION __clang_major__.__clang_minor__.__clang_patchlevel__
# ifdef __apple_build_version__
%XCODE 1
# endif
#elif defined(__GNUC__) && !defined(__MINGW32__)
%COMPILER "gcc"
%VERSION __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
#endif
#if __cplusplus
%cplusplus __cplusplus
#elif __STDC_VERSION__
%STDC_VERSION __STDC_VERSION__
#endif
"""
)
# While we're doing some preprocessing, we might as well do some more
# preprocessor-based tests at the same time, to check the toolchain
# matches what we want.
for name, preprocessor_checks in (
("CPU", CPU_preprocessor_checks),
("KERNEL", kernel_preprocessor_checks),
("OS", OS_preprocessor_checks),
):
for n, (value, condition) in enumerate(iteritems(preprocessor_checks)):
check += dedent(
"""\
#%(if)s %(condition)s
%%%(name)s "%(value)s"
"""
% {
"if": "elif" if n else "if",
"condition": condition,
"name": name,
"value": value,
}
)
check += "#endif\n"
# Also check for endianness. The advantage of living in modern times is
# that all the modern compilers we support now have __BYTE_ORDER__ defined
# by the preprocessor.
check += dedent(
"""\
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
%ENDIANNESS "little"
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
%ENDIANNESS "big"
#endif
"""
)
result = try_preprocess(compiler, language, check)
if not result:
raise FatalCheckError("Unknown compiler or compiler not supported.")
# Metadata emitted by preprocessors such as GCC with LANG=ja_JP.utf-8 may
# have non-ASCII characters. Treat the output as bytearray.
data = {}
for line in result.splitlines():
if line.startswith("%"):
k, _, v = line.partition(" ")
k = k.lstrip("%")
data[k] = v.replace(" ", "").lstrip('"').rstrip('"')
log.debug("%s = %s", k, data[k])
try:
type = CompilerType(data["COMPILER"])
except Exception:
raise FatalCheckError("Unknown compiler or compiler not supported.")
cplusplus = int(data.get("cplusplus", "0L").rstrip("L"))
stdc_version = int(data.get("STDC_VERSION", "0L").rstrip("L"))
version = data.get("VERSION")
if version:
version = Version(version)
if data.get("XCODE"):
# Derived from https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
# with enough granularity for major.minor version checks further
# down the line
if version < "9.1":
version = Version("4.0.0.or.less")
elif version < "10.0":
version = Version("5.0.2")
elif version < "10.0.1":
version = Version("6.0.1")
elif version < "11.0":
version = Version("7.0.0")
elif version < "11.0.3":
version = Version("8.0.0")
elif version < "12.0":
version = Version("9.0.0")
elif version < "12.0.1":
version = Version("10.0.0")
else:
version = Version("10.0.0.or.more")
return namespace(
type=type,
version=version,
cpu=data.get("CPU"),
kernel=data.get("KERNEL"),
endianness=data.get("ENDIANNESS"),
os=data.get("OS"),
language="C++" if cplusplus else "C",
language_version=cplusplus if cplusplus else stdc_version,
xcode=bool(data.get("XCODE")),
)
def same_arch_different_bits():
return (
("x86", "x86_64"),
("ppc", "ppc64"),
("sparc", "sparc64"),
)
@imports(_from="mozbuild.shellutil", _import="quote")
@imports(_from="mozbuild.configure.constants", _import="OS_preprocessor_checks")
def check_compiler(compiler, language, target):
info = get_compiler_info(compiler, language)
flags = []
# Check language standards
# --------------------------------------------------------------------
if language != info.language:
raise FatalCheckError(
"`%s` is not a %s compiler." % (quote(*compiler), language)
)
# Note: We do a strict version check because there sometimes are backwards
# incompatible changes in the standard, and not all code that compiles as
# C99 compiles as e.g. C11 (as of writing, this is true of libnestegg, for
# example)
if info.language == "C" and info.language_version != 199901:
if info.type == "clang-cl":
flags.append("-Xclang")
flags.append("-std=gnu99")
cxx17_version = 201703
if info.language == "C++":
if info.language_version != cxx17_version:
# MSVC headers include C++17 features, but don't guard them
# with appropriate checks.
if info.type == "clang-cl":
flags.append("-Xclang")
flags.append("-std=c++17")
else:
flags.append("-std=gnu++17")
# Check compiler target
# --------------------------------------------------------------------
has_target = False
if info.type == "clang":
# Add the target explicitly when the target is aarch64 macosx, because
# the Xcode clang target is named differently, and we need to work around
# https://github.com/rust-lang/rust-bindgen/issues/1871 and
# https://github.com/alexcrichton/cc-rs/issues/542 so we always want
# the target on the command line, even if the compiler would default to
# that.
if info.xcode and target.os == "OSX" and target.cpu == "aarch64":
if "--target=arm64-apple-darwin" not in compiler:
flags.append("--target=arm64-apple-darwin")
has_target = True
elif (
not info.kernel
or info.kernel != target.kernel
or not info.endianness
or info.endianness != target.endianness
):
flags.append("--target=%s" % target.toolchain)
has_target = True
# Add target flag when there is an OS mismatch (e.g. building for Android on
# Linux). However, only do this if the target OS is in our whitelist, to
# keep things the same on other platforms.
elif target.os in OS_preprocessor_checks and (
not info.os or info.os != target.os
):
flags.append("--target=%s" % target.toolchain)
has_target = True
if not has_target and (not info.cpu or info.cpu != target.cpu):
same_arch = same_arch_different_bits()
if (target.cpu, info.cpu) in same_arch:
flags.append("-m32")
elif (info.cpu, target.cpu) in same_arch:
flags.append("-m64")
elif info.type == "clang-cl" and target.cpu == "aarch64":
flags.append("--target=%s" % target.toolchain)
elif info.type == "clang":
flags.append("--target=%s" % target.toolchain)
return namespace(
type=info.type,
version=info.version,
target_cpu=info.cpu,
target_kernel=info.kernel,
target_endianness=info.endianness,
target_os=info.os,
flags=flags,
)
@imports(_from="__builtin__", _import="open")
@imports("json")
@imports("os")
def get_vc_paths(topsrcdir):
def vswhere(args):
program_files = os.environ.get("PROGRAMFILES(X86)") or os.environ.get(
"PROGRAMFILES"
)
if not program_files:
return []
vswhere = os.path.join(
program_files, "Microsoft Visual Studio", "Installer", "vswhere.exe"
)
if not os.path.exists(vswhere):
return []
return json.loads(check_cmd_output(vswhere, "-format", "json", *args))
for install in vswhere(
[
"-products",
"*",
"-requires",
"Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
]
):
path = install["installationPath"]
tools_version = (
open(
os.path.join(
path, r"VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt"
),
"r",
)
.read()
.strip()
)
tools_path = os.path.join(path, r"VC\Tools\MSVC", tools_version)
yield (Version(install["installationVersion"]), tools_path)
@depends(host)
def host_is_windows(host):
if host.kernel == "WINNT":
return True
option(
"--with-visual-studio-version",
nargs=1,
choices=("2017",),
when=host_is_windows,
help="Select a specific Visual Studio version to use",
)
@depends("--with-visual-studio-version", when=host_is_windows)
def vs_major_version(value):
if value:
return {"2017": 15}[value[0]]
option(
env="VC_PATH",
nargs=1,
when=host_is_windows,
help="Path to the Microsoft Visual C/C++ compiler",
)
@depends(
host,
vs_major_version,
check_build_environment,
"VC_PATH",
"--with-visual-studio-version",
when=host_is_windows,
)
@imports(_from="operator", _import="itemgetter")
def vc_compiler_paths_for_version(
host, vs_major_version, env, vc_path, vs_release_name
):
if vc_path and vs_release_name:
die("VC_PATH and --with-visual-studio-version cannot be used together.")
if vc_path:
# Use an arbitrary version, it doesn't matter.
all_versions = [(Version("15"), vc_path[0])]
else:
all_versions = sorted(get_vc_paths(env.topsrcdir), key=itemgetter(0))
if not all_versions:
return
if vs_major_version:
versions = [d for (v, d) in all_versions if v.major == vs_major_version]
if not versions:
die("Visual Studio %s could not be found!" % vs_release_name)
path = versions[0]
else:
# Choose the newest version.
path = all_versions[-1][1]
host_dir = {
"x86_64": "HostX64",
"x86": "HostX86",
}.get(host.cpu)
if host_dir:
path = os.path.join(path, "bin", host_dir)
return {
"x64": [os.path.join(path, "x64")],
# The cross toolchains require DLLs from the native x64 toolchain.
"x86": [os.path.join(path, "x86"), os.path.join(path, "x64")],
"arm64": [os.path.join(path, "arm64"), os.path.join(path, "x64")],
}
@depends(target, vc_compiler_paths_for_version, when=host_is_windows)
def vc_compiler_path(target, paths):
vc_target = {
"x86": "x86",
"x86_64": "x64",
"arm": "arm",
"aarch64": "arm64",
}.get(target.cpu)
if not paths:
return
return paths.get(vc_target)
@depends(vc_compiler_path, original_path)
@imports("os")
@imports(_from="os", _import="environ")
def vc_toolchain_search_path(vc_compiler_path, original_path):
result = list(original_path)
if vc_compiler_path:
# The second item, if there is one, is necessary to have in $PATH for
# Windows to load the required DLLs from there.
if len(vc_compiler_path) > 1:
environ["PATH"] = os.pathsep.join(result + vc_compiler_path[1:])
# The first item is where the programs are going to be
result.append(vc_compiler_path[0])
return result
clang_search_path = bootstrap_search_path("clang/bin")
@depends(bootstrap_search_path("rustc/bin", when="MOZ_AUTOMATION"), original_path)
@imports("os")
@imports(_from="os", _import="environ")
def rust_search_path(rust_path, original_path):
result = list(rust_path or original_path)
# Also add the rustup install directory for cargo/rustc.
cargo_home = environ.get("CARGO_HOME", "")
if cargo_home:
cargo_home = os.path.abspath(cargo_home)
else:
cargo_home = os.path.expanduser(os.path.join("~", ".cargo"))
rustup_path = os.path.join(cargo_home, "bin")
result.append(rustup_path)
return result
# As a workaround until bug 1516228 and bug 1516253 are fixed, set the PATH
# variable for the build to contain the toolchain search path.
@depends(vc_toolchain_search_path)
@imports("os")
@imports(_from="os", _import="environ")
def altered_path(vc_toolchain_search_path):
path = environ["PATH"].split(os.pathsep)
altered_path = list(vc_toolchain_search_path)
for p in path:
if p not in altered_path:
altered_path.append(p)
return os.pathsep.join(altered_path)
set_config("PATH", altered_path)
# Compiler wrappers
# ==============================================================
option(
"--with-compiler-wrapper",
env="COMPILER_WRAPPER",
nargs=1,
help="Enable compiling with wrappers such as distcc and ccache",
)
option("--with-ccache", env="CCACHE", nargs="?", help="Enable compiling with ccache")
@depends_if("--with-ccache")
def ccache(value):
if len(value):
return value
# If --with-ccache was given without an explicit value, we default to
# 'ccache'.
return "ccache"
ccache = check_prog(
"CCACHE",
progs=(),
input=ccache,
paths=bootstrap_search_path(
"sccache", when=depends("CCACHE")(lambda c: len(c) and c[0] == "sccache")
),
allow_missing=True,
)
option(env="CCACHE_PREFIX", nargs=1, help="Compiler prefix to use when using ccache")
ccache_prefix = depends_if("CCACHE_PREFIX")(lambda prefix: prefix[0])
set_config("CCACHE_PREFIX", ccache_prefix)
# Distinguish ccache from sccache.
@depends_if(ccache)
def ccache_is_sccache(ccache):
return check_cmd_output(ccache, "--version").startswith("sccache")
@depends(ccache, ccache_is_sccache)
def using_ccache(ccache, ccache_is_sccache):
return ccache and not ccache_is_sccache
@depends_if(ccache, ccache_is_sccache)
def using_sccache(ccache, ccache_is_sccache):
return ccache and ccache_is_sccache
option(env="RUSTC_WRAPPER", nargs=1, help="Wrap rust compilation with given tool")
@depends(ccache, ccache_is_sccache, "RUSTC_WRAPPER")
@imports(_from="textwrap", _import="dedent")
@imports("os")
def check_sccache_version(ccache, ccache_is_sccache, rustc_wrapper):
sccache_min_version = Version("0.2.13")
def check_version(path):
out = check_cmd_output(path, "--version")
version = Version(out.rstrip().split()[-1])
if version < sccache_min_version:
die(
dedent(
"""\
sccache %s or later is required. sccache in use at %s has
version %s.
Please upgrade or acquire a new version with |./mach bootstrap|.
"""
),
sccache_min_version,
path,
version,
)
if ccache and ccache_is_sccache:
check_version(ccache)
if rustc_wrapper and (
os.path.splitext(os.path.basename(rustc_wrapper[0]))[0].lower() == "sccache"
):
check_version(rustc_wrapper[0])
set_config("MOZ_USING_CCACHE", using_ccache)
set_config("MOZ_USING_SCCACHE", using_sccache)
option(env="SCCACHE_VERBOSE_STATS", help="Print verbose sccache stats after build")
@depends(using_sccache, "SCCACHE_VERBOSE_STATS")
def sccache_verbose_stats(using_sccache, verbose_stats):
return using_sccache and bool(verbose_stats)
set_config("SCCACHE_VERBOSE_STATS", sccache_verbose_stats)
@depends("--with-compiler-wrapper", ccache)
@imports(_from="mozbuild.shellutil", _import="split", _as="shell_split")
def compiler_wrapper(wrapper, ccache):
if wrapper:
raw_wrapper = wrapper[0]
wrapper = shell_split(raw_wrapper)
wrapper_program = find_program(wrapper[0])
if not wrapper_program:
die(
"Cannot find `%s` from the given compiler wrapper `%s`",
wrapper[0],
raw_wrapper,
)
wrapper[0] = wrapper_program
if ccache:
if wrapper:
return tuple([ccache] + wrapper)
else:
return (ccache,)
elif wrapper:
return tuple(wrapper)
@depends_if(compiler_wrapper)
def using_compiler_wrapper(compiler_wrapper):
return True
set_config("MOZ_USING_COMPILER_WRAPPER", using_compiler_wrapper)
@template
def default_c_compilers(host_or_target, other_c_compiler=None):
"""Template defining the set of default C compilers for the host and
target platforms.
`host_or_target` is either `host` or `target` (the @depends functions
from init.configure.
`other_c_compiler` is the `target` C compiler when `host_or_target` is `host`.
"""
assert host_or_target in {host, target}
other_c_compiler = () if other_c_compiler is None else (other_c_compiler,)
@depends(host_or_target, target, toolchain_prefix, *other_c_compiler)
def default_c_compilers(
host_or_target, target, toolchain_prefix, *other_c_compiler
):
if host_or_target.kernel == "WINNT":
supported = types = ("clang-cl", "clang")
elif host_or_target.kernel == "Darwin":
types = ("clang",)
supported = ("clang", "gcc")
else:
supported = types = ("clang", "gcc")
info = other_c_compiler[0] if other_c_compiler else None
if info and info.type in supported:
# When getting default C compilers for the host, we prioritize the
# same compiler as the target C compiler.
prioritized = info.compiler
if info.type == "gcc":
same_arch = same_arch_different_bits()
if (
target.cpu != host_or_target.cpu
and (target.cpu, host_or_target.cpu) not in same_arch
and (host_or_target.cpu, target.cpu) not in same_arch
):
# If the target C compiler is GCC, and it can't be used with
# -m32/-m64 for the host, it's probably toolchain-prefixed,
# so we prioritize a raw 'gcc' instead.
prioritized = info.type
types = [prioritized] + [t for t in types if t != info.type]
gcc = ("gcc",)
if toolchain_prefix and host_or_target is target:
gcc = tuple("%sgcc" % p for p in toolchain_prefix) + gcc
result = []
for type in types:
if type == "gcc":
result.extend(gcc)
else:
result.append(type)
return tuple(result)
return default_c_compilers
@template
def default_cxx_compilers(c_compiler, other_c_compiler=None, other_cxx_compiler=None):
"""Template defining the set of default C++ compilers for the host and
target platforms.
`c_compiler` is the @depends function returning a Compiler instance for
the desired platform.
Because the build system expects the C and C++ compilers to be from the
same compiler suite, we derive the default C++ compilers from the C
compiler that was found if none was provided.
We also factor in the target C++ compiler when getting the default host
C++ compiler, using the target C++ compiler if the host and target C
compilers are the same.
"""
assert (other_c_compiler is None) == (other_cxx_compiler is None)
if other_c_compiler is not None:
other_compilers = (other_c_compiler, other_cxx_compiler)
else:
other_compilers = ()
@depends(c_compiler, *other_compilers)
def default_cxx_compilers(c_compiler, *other_compilers):
if other_compilers:
other_c_compiler, other_cxx_compiler = other_compilers
if other_c_compiler.compiler == c_compiler.compiler:
return (other_cxx_compiler.compiler,)
dir = os.path.dirname(c_compiler.compiler)
file = os.path.basename(c_compiler.compiler)
if c_compiler.type == "gcc":
return (os.path.join(dir, file.replace("gcc", "g++")),)
if c_compiler.type == "clang":
return (os.path.join(dir, file.replace("clang", "clang++")),)
return (c_compiler.compiler,)
return default_cxx_compilers
@template
def provided_program(env_var, when=None):
"""Template handling cases where a program can be specified either as a
path or as a path with applicable arguments.
"""
@depends_if(env_var, when=when)
@imports(_from="itertools", _import="takewhile")
@imports(_from="mozbuild.shellutil", _import="split", _as="shell_split")
def provided(cmd):
# Assume the first dash-prefixed item (and any subsequent items) are
# command-line options, the item before the dash-prefixed item is
# the program we're looking for, and anything before that is a wrapper
# of some kind (e.g. sccache).
cmd = shell_split(cmd[0])
without_flags = list(takewhile(lambda x: not x.startswith("-"), cmd))
return namespace(
wrapper=without_flags[:-1],
program=without_flags[-1],
flags=cmd[len(without_flags) :],
)
return provided
# We'll re-evaluate later, but for now, don't use the sysroot automatically
# even if it exists, unless --enable-bootstrap was passed, or when building
# on automation.
@depends(
bootstrap_path("sysroot", context=target, when=target_is_linux),
"--enable-bootstrap",
"MOZ_AUTOMATION",
)
def sysroot_path(path, bootstrap, automation):
if bootstrap or automation:
if path:
log.info("Using sysroot in %s", path)
return path
@template
def sysroot_flags(host_or_target):
@depends(
host_or_target, macos_sdk, sysroot_path if host_or_target is target else never
)
def sysroot_flags(host_or_target, macos_sdk, sysroot_path):
if macos_sdk and host_or_target.os == "OSX":
return ["-isysroot", macos_sdk]
if sysroot_path:
return ["--sysroot", sysroot_path]
return []
return sysroot_flags
host_sysroot_flags = sysroot_flags(host)
target_sysroot_flags = sysroot_flags(target)
@depends(target, when=sysroot_path)
def multiarch_dir(target):
if target.cpu == "x86":
# Turn e.g. i686-linux-gnu into i386-linux-gnu
return target.toolchain.replace(target.raw_cpu, "i386")
return target.toolchain
def minimum_gcc_version():
return Version("7.1.0")
@template
def compiler(
language,
host_or_target,
c_compiler=None,
other_compiler=None,
other_c_compiler=None,
):
"""Template handling the generic base checks for the compiler for the
given `language` on the given platform (`host_or_target`).
`host_or_target` is either `host` or `target` (the @depends functions
from init.configure.
When the language is 'C++', `c_compiler` is the result of the `compiler`
template for the language 'C' for the same `host_or_target`.
When `host_or_target` is `host`, `other_compiler` is the result of the
`compiler` template for the same `language` for `target`.
When `host_or_target` is `host` and the language is 'C++',
`other_c_compiler` is the result of the `compiler` template for the
language 'C' for `target`.
"""
assert host_or_target in {host, target}
assert language in ("C", "C++")
assert language == "C" or c_compiler is not None
assert host_or_target is target or other_compiler is not None
assert language == "C" or host_or_target is target or other_c_compiler is not None
host_or_target_str = {
host: "host",
target: "target",
}[host_or_target]
sysroot_flags = {
host: host_sysroot_flags,
target: target_sysroot_flags,
}[host_or_target]
var = {
("C", target): "CC",
("C++", target): "CXX",
("C", host): "HOST_CC",
("C++", host): "HOST_CXX",
}[language, host_or_target]
default_compilers = {
"C": lambda: default_c_compilers(host_or_target, other_compiler),
"C++": lambda: default_cxx_compilers(
c_compiler, other_c_compiler, other_compiler
),
}[language]()
what = "the %s %s compiler" % (host_or_target_str, language)
option(env=var, nargs=1, help="Path to %s" % what)
# Handle the compiler given by the user through one of the CC/CXX/HOST_CC/
# HOST_CXX variables.
provided_compiler = provided_program(var)
# Normally, we'd use `var` instead of `_var`, but the interaction with
# old-configure complicates things, and for now, we a) can't take the plain
# result from check_prog as CC/CXX/HOST_CC/HOST_CXX and b) have to let
# old-configure AC_SUBST it (because it's autoconf doing it, not us)
compiler = check_prog(
"_%s" % var,
what=what,
progs=default_compilers,
input=provided_compiler.program,
paths=clang_search_path,
)
@depends(
compiler, provided_compiler, compiler_wrapper, host_or_target, sysroot_flags
)
@checking("whether %s can be used" % what, lambda x: bool(x))
@imports(_from="mozbuild.shellutil", _import="quote")
def valid_compiler(
compiler, provided_compiler, compiler_wrapper, host_or_target, sysroot_flags
):
wrapper = list(compiler_wrapper or ())
flags = list(sysroot_flags or ())
if provided_compiler:
provided_wrapper = list(provided_compiler.wrapper)
# When doing a subconfigure, the compiler is set by old-configure
# and it contains the wrappers from --with-compiler-wrapper and
# --with-ccache.
if provided_wrapper[: len(wrapper)] == wrapper:
provided_wrapper = provided_wrapper[len(wrapper) :]
wrapper.extend(provided_wrapper)
flags.extend(provided_compiler.flags)
info = check_compiler(wrapper + [compiler] + flags, language, host_or_target)
# Check that the additional flags we got are enough to not require any
# more flags. If we get an exception, just ignore it; it's liable to be
# invalid command-line flags, which means the compiler we're checking
# doesn't support those command-line flags and will fail one or more of
# the checks below.
try:
if info.flags:
flags += info.flags
info = check_compiler(
wrapper + [compiler] + flags, language, host_or_target
)
except FatalCheckError:
pass
if not info.target_cpu or info.target_cpu != host_or_target.cpu:
raise FatalCheckError(
"%s %s compiler target CPU (%s) does not match --%s CPU (%s)"
% (
host_or_target_str.capitalize(),
language,
info.target_cpu or "unknown",
host_or_target_str,
host_or_target.raw_cpu,
)
)
if not info.target_kernel or (info.target_kernel != host_or_target.kernel):
raise FatalCheckError(
"%s %s compiler target kernel (%s) does not match --%s kernel (%s)"
% (
host_or_target_str.capitalize(),
language,
info.target_kernel or "unknown",
host_or_target_str,
host_or_target.kernel,
)
)
if not info.target_endianness or (
info.target_endianness != host_or_target.endianness
):
raise FatalCheckError(
"%s %s compiler target endianness (%s) does not match --%s "
"endianness (%s)"
% (
host_or_target_str.capitalize(),
language,
info.target_endianness or "unknown",
host_or_target_str,
host_or_target.endianness,
)
)
# Compiler version checks
# ===================================================
# Check the compiler version here instead of in `compiler_version` so
# that the `checking` message doesn't pretend the compiler can be used
# to then bail out one line later.
if info.type == "gcc":
if host_or_target.os == "Android":
raise FatalCheckError(
"GCC is not supported on Android.\n"
"Please use clang from the Android NDK instead."
)
gcc_version = minimum_gcc_version()
if info.version < gcc_version:
raise FatalCheckError(
"Only GCC %d.%d or newer is supported (found version %s)."
% (gcc_version.major, gcc_version.minor, info.version)
)
if info.type == "clang-cl":
if info.version < "8.0.0":
raise FatalCheckError(
"Only clang-cl 8.0 or newer is supported (found version %s)"
% info.version
)
# If you want to bump the version check here ensure the version
# is known for Xcode in get_compiler_info.
if info.type == "clang" and info.version < "5.0":
raise FatalCheckError(
"Only clang/llvm 5.0 or newer is supported (found version %s)."
% info.version
)
if info.flags:
raise FatalCheckError("Unknown compiler or compiler not supported.")
return namespace(
wrapper=wrapper,
compiler=compiler,
flags=flags,
type=info.type,
version=info.version,
language=language,
)
@depends(valid_compiler)
@checking("%s version" % what)
def compiler_version(compiler):
return compiler.version
if language == "C++":
@depends(valid_compiler, c_compiler)
def valid_compiler(compiler, c_compiler):
if compiler.type != c_compiler.type:
die(
"The %s C compiler is %s, while the %s C++ compiler is "
"%s. Need to use the same compiler suite.",
host_or_target_str,
c_compiler.type,
host_or_target_str,
compiler.type,
)
if compiler.version != c_compiler.version:
die(
"The %s C compiler is version %s, while the %s C++ "
"compiler is version %s. Need to use the same compiler "
"version.",
host_or_target_str,
c_compiler.version,
host_or_target_str,
compiler.version,
)
return compiler
# Set CC/CXX/HOST_CC/HOST_CXX for old-configure, which needs the wrapper
# and the flags that were part of the user input for those variables to
# be provided.
add_old_configure_assignment(
var,
depends_if(valid_compiler)(
lambda x: list(x.wrapper) + [x.compiler] + list(x.flags)
),
)
if host_or_target is target:
add_old_configure_assignment(
"ac_cv_prog_%s" % var,
depends_if(valid_compiler)(
lambda x: list(x.wrapper) + [x.compiler] + list(x.flags)
),
)
# We check that it works in python configure already.
add_old_configure_assignment("ac_cv_prog_%s_works" % var.lower(), "yes")
add_old_configure_assignment(
"ac_cv_prog_%s_cross" % var.lower(),
depends(cross_compiling)(lambda x: "yes" if x else "no"),
)
gcc_like = depends(valid_compiler.type)(
lambda x: "yes" if x in ("gcc", "clang") else "no"
)
add_old_configure_assignment("ac_cv_prog_%s_g" % var.lower(), gcc_like)
if language == "C":
add_old_configure_assignment("ac_cv_prog_gcc", gcc_like)
if language == "C++":
add_old_configure_assignment("ac_cv_prog_gxx", gcc_like)
# Set CC_TYPE/CC_VERSION/HOST_CC_TYPE/HOST_CC_VERSION to allow
# old-configure to do some of its still existing checks.
if language == "C":
set_config("%s_TYPE" % var, valid_compiler.type)
add_old_configure_assignment("%s_TYPE" % var, valid_compiler.type)
set_config(
"%s_VERSION" % var, depends(valid_compiler.version)(lambda v: str(v))
)
valid_compiler = compiler_class(valid_compiler, host_or_target)
def compiler_error():
raise FatalCheckError(
"Failed compiling a simple %s source with %s" % (language, what)
)
valid_compiler.try_compile(check_msg="%s works" % what, onerror=compiler_error)
set_config("%s_BASE_FLAGS" % var, valid_compiler.flags)
# Set CPP/CXXCPP for both the build system and old-configure. We don't
# need to check this works for preprocessing, because we already relied
# on $CC -E/$CXX -E doing preprocessing work to validate the compiler
# in the first place.
if host_or_target is target:
pp_var = {
"C": "CPP",
"C++": "CXXCPP",
}[language]
preprocessor = depends_if(valid_compiler)(
lambda x: list(x.wrapper) + [x.compiler, "-E"] + list(x.flags)
)
set_config(pp_var, preprocessor)
add_old_configure_assignment(pp_var, preprocessor)
if language == "C":
linker_var = {
target: "LD",
host: "HOST_LD",
}[host_or_target]
@deprecated_option(env=linker_var, nargs=1)
def linker(value):
if value:
return value[0]
@depends(linker)
def unused_linker(linker):
if linker:
log.warning(
"The value of %s is not used by this build system." % linker_var
)
return valid_compiler
c_compiler = compiler("C", target)
cxx_compiler = compiler("C++", target, c_compiler=c_compiler)
host_c_compiler = compiler("C", host, other_compiler=c_compiler)
host_cxx_compiler = compiler(
"C++",
host,
c_compiler=host_c_compiler,
other_compiler=cxx_compiler,
other_c_compiler=c_compiler,
)
# Generic compiler-based conditions.
building_with_gcc = depends(c_compiler)(lambda info: info.type == "gcc")
@depends(cxx_compiler, ccache_prefix)
@imports("os")
def cxx_is_icecream(info, ccache_prefix):
if (
os.path.islink(info.compiler)
and os.path.basename(os.readlink(info.compiler)) == "icecc"
):
return True
if ccache_prefix and os.path.basename(ccache_prefix) == "icecc":
return True
set_config("CXX_IS_ICECREAM", cxx_is_icecream)
@depends(c_compiler)
def msvs_version(info):
# clang-cl emulates the same version scheme as cl. And MSVS_VERSION needs to
# be set for GYP on Windows.
if info.type == "clang-cl":
return "2017"
return ""
set_config("MSVS_VERSION", msvs_version)
include("compile-checks.configure")
include("arm.configure", when=depends(target.cpu)(lambda cpu: cpu == "arm"))
@depends(host, host_os_kernel_major_version, target)
def needs_macos_sdk_headers_check(host, version, target):
# Only an issue on Mac OS X 10.14 (and probably above).
if host.kernel != "Darwin" or target.kernel != "Darwin" or version < "18":
return
return True
@depends(
cxx_compiler.try_run(
header="#include_next <inttypes.h>",
check_msg="for macOS SDK headers",
when=needs_macos_sdk_headers_check,
),
when=needs_macos_sdk_headers_check,
)
def check_have_mac_10_14_sdk(value):
if value:
return
die(
"System inttypes.h not found. Please try running "
"`open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg` "
"and following the instructions to install the necessary headers"
)
@depends(
have_64_bit,
try_compile(
body='static_assert(sizeof(void *) == 8, "")', check_msg="for 64-bit OS"
),
)
def check_have_64_bit(have_64_bit, compiler_have_64_bit):
if have_64_bit != compiler_have_64_bit:
configure_error(
"The target compiler does not agree with configure "
"about the target bitness."
)
@depends(cxx_compiler, target)
def needs_libstdcxx_newness_check(cxx_compiler, target):
# We only have to care about this on Linux and MinGW.
if cxx_compiler.type == "clang-cl":
return
if target.kernel not in ("Linux", "WINNT"):
return
if target.os == "Android":
return
return True
def die_on_old_libstdcxx():
die(
"The libstdc++ in use is not new enough. Please run "
"./mach bootstrap to update your compiler, or update your system "
"libstdc++ installation."
)
try_compile(
includes=["cstddef"],
body="\n".join(
[
# _GLIBCXX_RELEASE showed up in libstdc++ 7.
"#if defined(__GLIBCXX__) && !defined(_GLIBCXX_RELEASE)",
"# error libstdc++ not new enough",
"#endif",
"#if defined(_GLIBCXX_RELEASE)",
"# if _GLIBCXX_RELEASE < %d" % minimum_gcc_version().major,
"# error libstdc++ not new enough",
"# else",
" (void) 0",
"# endif",
"#endif",
]
),
check_msg="for new enough STL headers from libstdc++",
when=needs_libstdcxx_newness_check,
onerror=die_on_old_libstdcxx,
)
@depends(c_compiler, target)
def default_debug_flags(compiler_info, target):
# Debug info is ON by default.
if compiler_info.type == "clang-cl":
return "-Z7"
elif target.kernel == "WINNT" and compiler_info.type == "clang":
return "-g -gcodeview"
return "-g"
option(env="MOZ_DEBUG_FLAGS", nargs=1, help="Debug compiler flags")
imply_option("--enable-debug-symbols", depends_if("--enable-debug")(lambda v: v))
option(
"--disable-debug-symbols",
nargs="?",
help="Disable debug symbols using the given compiler flags",
)
set_config("MOZ_DEBUG_SYMBOLS", depends_if("--enable-debug-symbols")(lambda _: True))
@depends("MOZ_DEBUG_FLAGS", "--enable-debug-symbols", default_debug_flags)
def debug_flags(env_debug_flags, enable_debug_flags, default_debug_flags):
# If MOZ_DEBUG_FLAGS is set, and --enable-debug-symbols is set to a value,
# --enable-debug-symbols takes precedence. Note, the value of
# --enable-debug-symbols may be implied by --enable-debug.
if len(enable_debug_flags):
return enable_debug_flags[0]
if env_debug_flags:
return env_debug_flags[0]
return default_debug_flags
set_config("MOZ_DEBUG_FLAGS", debug_flags)
add_old_configure_assignment("MOZ_DEBUG_FLAGS", debug_flags)
@depends(c_compiler)
def color_cflags(info):
# We could test compiling with flags. By why incur the overhead when
# color support should always be present in a specific toolchain
# version?
# Code for auto-adding this flag to compiler invocations needs to
# determine if an existing flag isn't already present. That is likely
# using exact string matching on the returned value. So if the return
# value changes to e.g. "<x>=always", exact string match may fail and
# multiple color flags could be added. So examine downstream consumers
# before adding flags to return values.
if info.type == "gcc":
return "-fdiagnostics-color"
elif info.type == "clang":
return "-fcolor-diagnostics"
else:
return ""
set_config("COLOR_CFLAGS", color_cflags)
# Some standard library headers (notably bionic on Android) declare standard
# functions (e.g. getchar()) and also #define macros for those standard
# functions. libc++ deals with this by doing something like the following
# (explanatory comments added):
#
# #ifdef FUNC
# // Capture the definition of FUNC.
# inline _LIBCPP_INLINE_VISIBILITY int __libcpp_FUNC(...) { return FUNC(...); }
# #undef FUNC
# // Use a real inline definition.
# inline _LIBCPP_INLINE_VISIBILITY int FUNC(...) { return _libcpp_FUNC(...); }
# #endif
#
# _LIBCPP_INLINE_VISIBILITY is typically defined as:
#
# __attribute__((__visibility__("hidden"), __always_inline__))
#
# Unfortunately, this interacts badly with our system header wrappers, as the:
#
# #pragma GCC visibility push(default)
#
# that they do prior to including the actual system header is treated by the
# compiler as an explicit declaration of visibility on every function declared
# in the header. Therefore, when the libc++ code above is encountered, it is
# as though the compiler has effectively seen:
#
# int FUNC(...) __attribute__((__visibility__("default")));
# int FUNC(...) __attribute__((__visibility__("hidden")));
#
# and the compiler complains about the mismatched visibility declarations.
#
# However, libc++ will only define _LIBCPP_INLINE_VISIBILITY if there is no
# existing definition. We can therefore define it to the empty string (since
# we are properly managing visibility ourselves) and avoid this whole mess.
# Note that we don't need to do this with gcc, as libc++ detects gcc and
# effectively does the same thing we are doing here.
#
# _LIBCPP_ALWAYS_INLINE needs a similar workarounds, since it too declares
# hidden visibility.
#
# _LIBCPP_HIDE_FROM_ABI is a macro in libc++ versions in NDKs >=r19. It too
# declares hidden visibility, but it also declares functions as excluded from
# explicit instantiation (roughly: the function can be unused in the current
# compilation, but does not then trigger an actual definition of the function;
# it is assumed the real definition comes from elsewhere). We need to replicate
# this setup.
@depends(c_compiler, target)
def libcxx_override_visibility(c_compiler, target):
if c_compiler.type == "clang" and target.os == "Android":
return namespace(
empty="",
hide_from_abi="__attribute__((__exclude_from_explicit_instantiation__))",
)
set_define("_LIBCPP_INLINE_VISIBILITY", libcxx_override_visibility.empty)
set_define("_LIBCPP_ALWAYS_INLINE", libcxx_override_visibility.empty)
set_define("_LIBCPP_HIDE_FROM_ABI", libcxx_override_visibility.hide_from_abi)
@depends(target, check_build_environment)
def visibility_flags(target, env):
if target.os != "WINNT":
if target.kernel == "Darwin":
return ("-fvisibility=hidden", "-fvisibility-inlines-hidden")
return (
"-I%s/system_wrappers" % os.path.join(env.dist),
"-include",
"%s/config/gcc_hidden.h" % env.topsrcdir,
)
@depends(target, visibility_flags)
def wrap_system_includes(target, visibility_flags):
if visibility_flags and target.kernel != "Darwin":
return True
set_define(
"HAVE_VISIBILITY_HIDDEN_ATTRIBUTE",
depends(visibility_flags)(lambda v: bool(v) or None),
)
set_define(
"HAVE_VISIBILITY_ATTRIBUTE", depends(visibility_flags)(lambda v: bool(v) or None)
)
set_config("WRAP_SYSTEM_INCLUDES", wrap_system_includes)
set_config("VISIBILITY_FLAGS", visibility_flags)
@template
def depend_cflags(host_or_target_c_compiler):
@depends(host_or_target_c_compiler)
def depend_cflags(host_or_target_c_compiler):
if host_or_target_c_compiler.type != "clang-cl":
return ["-MD", "-MP", "-MF $(MDDEPDIR)/$(@F).pp"]
else:
# clang-cl doesn't accept the normal -MD -MP -MF options that clang
# does, but the underlying cc1 binary understands how to generate
# dependency files. These options are based on analyzing what the
# normal clang driver sends to cc1 when given the "correct"
# dependency options.
return [
"-Xclang",
"-MP",
"-Xclang",
"-dependency-file",
"-Xclang",
"$(MDDEPDIR)/$(@F).pp",
"-Xclang",
"-MT",
"-Xclang",
"$@",
]
return depend_cflags
set_config("_DEPEND_CFLAGS", depend_cflags(c_compiler))
set_config("_HOST_DEPEND_CFLAGS", depend_cflags(host_c_compiler))
@depends(c_compiler)
def preprocess_option(compiler):
# The uses of PREPROCESS_OPTION depend on the spacing for -o/-Fi.
if compiler.type in ("gcc", "clang"):
return "-E -o "
else:
return "-P -Fi"
set_config("PREPROCESS_OPTION", preprocess_option)
# We only want to include windows.configure when we are compiling on
# Windows, or for Windows.
@depends(target, host)
def is_windows(target, host):
return host.kernel == "WINNT" or target.kernel == "WINNT"
include("windows.configure", when=is_windows)
# On Power ISA, determine compiler flags for VMX, VSX and VSX-3.
set_config(
"PPC_VMX_FLAGS",
["-maltivec"],
when=depends(target.cpu)(lambda cpu: cpu.startswith("ppc")),
)
set_config(
"PPC_VSX_FLAGS",
["-mvsx"],
when=depends(target.cpu)(lambda cpu: cpu.startswith("ppc")),
)
set_config(
"PPC_VSX3_FLAGS",
["-mvsx", "-mcpu=power9"],
when=depends(target.cpu)(lambda cpu: cpu.startswith("ppc")),
)
# ASAN
# ==============================================================
option("--enable-address-sanitizer", help="Enable Address Sanitizer")
@depends(when="--enable-address-sanitizer")
def asan():
return True
add_old_configure_assignment("MOZ_ASAN", asan)
# MSAN
# ==============================================================
option("--enable-memory-sanitizer", help="Enable Memory Sanitizer")
@depends(when="--enable-memory-sanitizer")
def msan():
return True
add_old_configure_assignment("MOZ_MSAN", msan)
# TSAN
# ==============================================================
option("--enable-thread-sanitizer", help="Enable Thread Sanitizer")
@depends(when="--enable-thread-sanitizer")
def tsan():
return True
add_old_configure_assignment("MOZ_TSAN", tsan)
# UBSAN
# ==============================================================
option(
"--enable-undefined-sanitizer", nargs="*", help="Enable UndefinedBehavior Sanitizer"
)
@depends_if("--enable-undefined-sanitizer")
def ubsan(options):
default_checks = [
"bool",
"bounds",
"enum",
"integer-divide-by-zero",
"object-size",
"pointer-overflow",
"return",
"vla-bound",
]
checks = options if len(options) else default_checks
return ",".join(checks)
add_old_configure_assignment("MOZ_UBSAN_CHECKS", ubsan)
option(
"--enable-signed-overflow-sanitizer",
help="Enable UndefinedBehavior Sanitizer (Signed Integer Overflow Parts)",
)
@depends(when="--enable-signed-overflow-sanitizer")
def ub_signed_overflow_san():
return True
add_old_configure_assignment("MOZ_SIGNED_OVERFLOW_SANITIZE", ub_signed_overflow_san)
option(
"--enable-unsigned-overflow-sanitizer",
help="Enable UndefinedBehavior Sanitizer (Unsigned Integer Overflow Parts)",
)
@depends(when="--enable-unsigned-overflow-sanitizer")
def ub_unsigned_overflow_san():
return True
add_old_configure_assignment("MOZ_UNSIGNED_OVERFLOW_SANITIZE", ub_unsigned_overflow_san)
# Security Hardening
# ==============================================================
option(
"--enable-hardening",
env="MOZ_SECURITY_HARDENING",
help="Enables security hardening compiler options",
)
# This function is a bit confusing. It adds or removes hardening flags in
# three stuations: if --enable-hardening is passed; if --disable-hardening
# is passed, and if no flag is passed.
#
# At time of this comment writing, all flags are actually added in the
# default no-flag case; making --enable-hardening the same as omitting the
# flag. --disable-hardening will omit the security flags. (However, not all
# possible security flags will be omitted by --disable-hardening, as many are
# compiler-default options we do not explicitly enable.)
@depends(
"--enable-hardening",
"--enable-address-sanitizer",
"--enable-debug",
"--enable-optimize",
c_compiler,
target,
)
def security_hardening_cflags(
hardening_flag, asan, debug, optimize, c_compiler, target
):
compiler_is_gccish = c_compiler.type in ("gcc", "clang")
mingw_clang = c_compiler.type == "clang" and target.os == "WINNT"
flags = []
ldflags = []
js_flags = []
js_ldflags = []
# ----------------------------------------------------------
# If hardening is explicitly enabled, or not explicitly disabled
if hardening_flag.origin == "default" or hardening_flag:
# FORTIFY_SOURCE ------------------------------------
# Require optimization for FORTIFY_SOURCE. See Bug 1417452
# Also, undefine it before defining it just in case a distro adds it, see Bug 1418398
if compiler_is_gccish and optimize and not asan:
# Don't enable FORTIFY_SOURCE on Android on the top-level, but do enable in js/
if target.os != "Android":
flags.append("-U_FORTIFY_SOURCE")
flags.append("-D_FORTIFY_SOURCE=2")
js_flags.append("-U_FORTIFY_SOURCE")
js_flags.append("-D_FORTIFY_SOURCE=2")
if mingw_clang:
# mingw-clang needs to link in ssp which is not done by default
ldflags.append("-lssp")
js_ldflags.append("-lssp")
# fstack-protector ------------------------------------
# Enable only if hardening is not disabled and ASAN is
# not on as ASAN will catch the crashes for us
if compiler_is_gccish and not asan:
flags.append("-fstack-protector-strong")
ldflags.append("-fstack-protector-strong")
js_flags.append("-fstack-protector-strong")
js_ldflags.append("-fstack-protector-strong")
if (
c_compiler.type == "clang"
and c_compiler.version >= "11.0.1"
and target.os not in ("WINNT", "OSX")
and target.cpu in ("x86", "x86_64", "ppc64", "s390x")
):
flags.append("-fstack-clash-protection")
ldflags.append("-fstack-clash-protection")
js_flags.append("-fstack-clash-protection")
js_ldflags.append("-fstack-clash-protection")
# ftrivial-auto-var-init ------------------------------
# Initialize local variables with a 0xAA pattern in clang debug builds.
# Linux32 fails some xpcshell tests with -ftrivial-auto-var-init
linux32 = target.kernel == "Linux" and target.cpu == "x86"
if (
(c_compiler.type == "clang" or c_compiler.type == "clang-cl")
and c_compiler.version >= "8"
and debug
and not linux32
):
if c_compiler.type == "clang-cl":
flags.append("-Xclang")
js_flags.append("-Xclang")
flags.append("-ftrivial-auto-var-init=pattern")
js_flags.append("-ftrivial-auto-var-init=pattern")
# ASLR ------------------------------------------------
# ASLR (dynamicbase) is enabled by default in clang-cl; but the
# mingw-clang build requires it to be explicitly enabled
if mingw_clang:
ldflags.append("-Wl,--dynamicbase")
js_ldflags.append("-Wl,--dynamicbase")
# Control Flow Guard (CFG) ----------------------------
if (
c_compiler.type == "clang-cl"
and c_compiler.version >= "8"
and (target.cpu != "aarch64" or c_compiler.version >= "8.0.1")
):
if target.cpu == "aarch64" and c_compiler.version >= "10.0.0":
# The added checks in clang 10 make arm64 builds crash. (Bug 1639318)
flags.append("-guard:cf,nochecks")
js_flags.append("-guard:cf,nochecks")
else:
flags.append("-guard:cf")
js_flags.append("-guard:cf")
# nolongjmp is needed because clang doesn't emit the CFG tables of
# setjmp return addresses https://bugs.llvm.org/show_bug.cgi?id=40057
ldflags.append("-guard:cf,nolongjmp")
js_ldflags.append("-guard:cf,nolongjmp")
# ----------------------------------------------------------
# If ASAN _is_ on, undefine FORTIFY_SOURCE just to be safe
if asan:
flags.append("-U_FORTIFY_SOURCE")
js_flags.append("-U_FORTIFY_SOURCE")
# fno-common -----------------------------------------
# Do not merge variables for ASAN; can detect some subtle bugs
if asan:
# clang-cl does not recognize the flag, it must be passed down to clang
if c_compiler.type == "clang-cl":
flags.append("-Xclang")
flags.append("-fno-common")
return namespace(
flags=flags,
ldflags=ldflags,
js_flags=js_flags,
js_ldflags=js_ldflags,
)
set_config("MOZ_HARDENING_CFLAGS", security_hardening_cflags.flags)
set_config("MOZ_HARDENING_LDFLAGS", security_hardening_cflags.ldflags)
set_config("MOZ_HARDENING_CFLAGS_JS", security_hardening_cflags.js_flags)
set_config("MOZ_HARDENING_LDFLAGS_JS", security_hardening_cflags.js_ldflags)
# Frame pointers
# ==============================================================
@depends(c_compiler)
def frame_pointer_flags(compiler):
if compiler.type == "clang-cl":
return namespace(
enable=["-Oy-"],
disable=["-Oy"],
)
return namespace(
enable=["-fno-omit-frame-pointer", "-funwind-tables"],
disable=["-fomit-frame-pointer", "-funwind-tables"],
)
@depends(
moz_optimize.optimize,
moz_debug,
target,
"--enable-memory-sanitizer",
"--enable-address-sanitizer",
"--enable-undefined-sanitizer",
)
def frame_pointer_default(optimize, debug, target, msan, asan, ubsan):
return bool(
not optimize
or debug
or msan
or asan
or ubsan
or (target.os == "WINNT" and target.cpu in ("x86", "aarch64"))
)
option(
"--enable-frame-pointers",
default=frame_pointer_default,
help="{Enable|Disable} frame pointers",
)
@depends("--enable-frame-pointers", frame_pointer_flags)
def frame_pointer_flags(enable, flags):
if enable:
return flags.enable
return flags.disable
set_config("MOZ_FRAMEPTR_FLAGS", frame_pointer_flags)
# Code Coverage
# ==============================================================
option("--enable-coverage", env="MOZ_CODE_COVERAGE", help="Enable code coverage")
@depends("--enable-coverage")
def code_coverage(value):
if value:
return True
set_config("MOZ_CODE_COVERAGE", code_coverage)
set_define("MOZ_CODE_COVERAGE", code_coverage)
@depends(target, c_compiler, vc_path, check_build_environment, when=code_coverage)
@imports("os")
@imports("re")
@imports(_from="__builtin__", _import="open")
def coverage_cflags(target, c_compiler, vc_path, build_env):
cflags = ["--coverage"]
# clang 11 no longer accepts this flag (its behavior became the default)
if c_compiler.type in ("clang", "clang-cl") and c_compiler.version < "11.0.0":
cflags += [
"-Xclang",
"-coverage-no-function-names-in-data",
]
if target.os == "WINNT" and c_compiler.type == "clang-cl":
# The Visual Studio directory is the parent of the Visual C++ directory.
vs_path = os.path.dirname(vc_path)
# We need to get the real path of Visual Studio, which can be in a
# symlinked directory (for example, on automation).
vs_path = os.path.realpath(vs_path)
cflags += [
"-fprofile-exclude-files=^{}.*$".format(re.escape(vs_path)),
]
response_file_path = os.path.join(build_env.topobjdir, "code_coverage_cflags")
with open(response_file_path, "w") as f:
f.write(" ".join(cflags))
return ["@{}".format(response_file_path)]
set_config("COVERAGE_CFLAGS", coverage_cflags)
# ==============================================================
option(env="RUSTFLAGS", nargs=1, help="Rust compiler flags")
set_config("RUSTFLAGS", depends("RUSTFLAGS")(lambda flags: flags))
# Rust compiler flags
# ==============================================================
@depends(moz_optimize)
def rustc_opt_level_default(moz_optimize):
return "2" if moz_optimize.optimize else "0"
option(
env="RUSTC_OPT_LEVEL",
default=rustc_opt_level_default,
nargs=1,
help="Rust compiler optimization level (-C opt-level=%s)",
)
@depends("RUSTC_OPT_LEVEL")
def rustc_opt_level(opt_level_option):
return opt_level_option[0]
@depends(
rustc_opt_level,
debug_rust,
target,
"--enable-debug-symbols",
"--enable-frame-pointers",
)
def rust_compile_flags(opt_level, debug_rust, target, debug_symbols, frame_pointers):
# Cargo currently supports only two interesting profiles for building:
# development and release. Those map (roughly) to --enable-debug and
# --disable-debug in Gecko, respectively.
#
# But we'd also like to support an additional axis of control for
# optimization level. Since Cargo only supports 2 profiles, we're in
# a bit of a bind.
#
# Code here derives various compiler options given other configure options.
# The options defined here effectively override defaults specified in
# Cargo.toml files.
debug_assertions = None
debug_info = None
# opt-level=0 implies -C debug-assertions, which may not be desired
# unless Rust debugging is enabled.
if opt_level == "0" and not debug_rust:
debug_assertions = False
if debug_symbols:
debug_info = "2"
opts = []
if opt_level is not None:
opts.append("opt-level=%s" % opt_level)
if debug_assertions is not None:
opts.append("debug-assertions=%s" % ("yes" if debug_assertions else "no"))
if debug_info is not None:
opts.append("debuginfo=%s" % debug_info)
if frame_pointers:
opts.append("force-frame-pointers=yes")
# CFG for arm64 is crashy, see `def security_hardening_cflags`.
if target.kernel == "WINNT" and target.cpu != "aarch64":
opts.append("control-flow-guard=yes")
flags = []
for opt in opts:
flags.extend(["-C", opt])
return flags
# Rust incremental compilation
# ==============================================================
option("--disable-cargo-incremental", help="Disable incremental rust compilation.")
@depends(
rustc_opt_level,
debug_rust,
"MOZ_AUTOMATION",
code_coverage,
"--disable-cargo-incremental",
using_sccache,
"RUSTC_WRAPPER",
)
@imports("os")
def cargo_incremental(
opt_level,
debug_rust,
automation,
code_coverage,
enabled,
using_sccache,
rustc_wrapper,
):
"""Return a value for the CARGO_INCREMENTAL environment variable."""
if not enabled:
return "0"
# We never want to use incremental compilation in automation. sccache
# handles our automation use case much better than incremental compilation
# would.
if automation:
return "0"
# Coverage instrumentation doesn't play well with incremental compilation
# https://github.com/rust-lang/rust/issues/50203.
if code_coverage:
return "0"
# Incremental compilation doesn't work as well as it should, and if we're
# using sccache, it's better to use sccache than incremental compilation.
if not using_sccache and rustc_wrapper:
rustc_wrapper = os.path.basename(rustc_wrapper[0])
if os.path.splitext(rustc_wrapper)[0].lower() == "sccache":
using_sccache = True
if using_sccache:
return "0"
# Incremental compilation is automatically turned on for debug builds, so
# we don't need to do anything special here.
if debug_rust:
return
# --enable-release automatically sets -O2 for Rust code, and people can
# set RUSTC_OPT_LEVEL to 2 or even 3 if they want to profile Rust code.
# Let's assume that if Rust code is using -O2 or higher, we shouldn't
# be using incremental compilation, because we'd be imposing a
# significant runtime cost.
if opt_level not in ("0", "1"):
return
# We're clear to use incremental compilation!
return "1"
set_config("CARGO_INCREMENTAL", cargo_incremental)
# Linker detection
# ==============================================================
# The policy is as follows:
# For Windows:
# - the linker is picked via the LINKER environment variable per windows.configure,
# but ought to be llvm-lld in any case.
# For macOS:
# - the linker is ld64, either from XCode on macOS, or from cctools-ports when
# cross-compiling. lld can be enabled manually, but as of writing, mach-o support
# for lld is incomplete.
# For other OSes:
# - on local developer builds: lld is used if present. Otherwise gold is used if present
# otherwise, BFD ld is used.
# - on release/official builds: whatever "ld" resolves to is used, except on Android x86/x86_64
# where BFD ld is used. Usually, "ld" resolves to BFD ld, except with the Android NDK,
# where it resolves to gold. lld is not used by default on Linux and Android because
# it introduces layout changes that prevent elfhack from working. See e.g.
# https://bugzilla.mozilla.org/show_bug.cgi?id=1563654#c2.
@depends(target)
def is_linker_option_enabled(target):
if target.kernel not in ("WINNT", "SunOS"):
return True
option(
"--enable-gold",
env="MOZ_FORCE_GOLD",
help="Enable GNU Gold Linker when it is not already the default",
when=is_linker_option_enabled,
)
imply_option("--enable-linker", "gold", when="--enable-gold")
@depends(target, developer_options)
def enable_linker_default(target, developer_options):
# x86-64 gold has bugs in how it lays out .note.* sections. See bug 1573820.
# x86-32 gold has a bug when assembly files are built. See bug 1651699.
# lld is faster, so prefer that for developer builds.
if target.os == "Android" and target.cpu in ("x86", "x86_64"):
return "lld" if developer_options else "bfd"
option(
"--enable-linker",
nargs=1,
help="Select the linker {bfd, gold, ld64, lld, lld-*}{|}",
default=enable_linker_default,
when=is_linker_option_enabled,
)
# No-op to enable depending on --enable-linker from default_elfhack in
# toolkit/moz.configure.
@depends("--enable-linker", when=is_linker_option_enabled)
def enable_linker(linker):
return linker
@depends(
"--enable-linker",
c_compiler,
developer_options,
"--enable-gold",
extra_toolchain_flags,
target,
when=is_linker_option_enabled,
)
@checking("for linker", lambda x: x.KIND)
@imports("os")
@imports("shutil")
def select_linker(
linker, c_compiler, developer_options, enable_gold, toolchain_flags, target
):
if linker:
linker = linker[0]
else:
linker = None
def is_valid_linker(linker):
if target.kernel == "Darwin":
valid_linkers = ("ld64", "lld")
else:
valid_linkers = ("bfd", "gold", "lld")
if linker in valid_linkers:
return True
if "lld" in valid_linkers and linker.startswith("lld-"):
return True
return False
if linker and not is_valid_linker(linker):
# Check that we are trying to use a supported linker
die("Unsupported linker " + linker)
# Check the kind of linker
version_check = ["-Wl,--version"]
cmd_base = c_compiler.wrapper + [c_compiler.compiler] + c_compiler.flags
def try_linker(linker):
# Generate the compiler flag
if linker == "ld64":
linker_flag = ["-fuse-ld=ld"]
elif linker:
linker_flag = ["-fuse-ld=" + linker]
else:
linker_flag = []
cmd = cmd_base + linker_flag + version_check
if toolchain_flags:
cmd += toolchain_flags
# ld64 doesn't have anything to print out a version. It does print out
# "ld64: For information on command line options please use 'man ld'."
# but that would require doing two attempts, one with --version, that
# would fail, and another with --help.
# Instead, abuse its LD_PRINT_OPTIONS feature to detect a message
# specific to it on stderr when it fails to process --version.
env = dict(os.environ)
env["LD_PRINT_OPTIONS"] = "1"
# Some locales might not print out the strings we are looking for, so
# ensure consistent output.
env["LC_ALL"] = "C"
retcode, stdout, stderr = get_cmd_output(*cmd, env=env)
if retcode == 1 and "Logging ld64 options" in stderr:
kind = "ld64"
elif retcode != 0:
return None
elif "GNU ld" in stdout:
# We are using the normal linker
kind = "bfd"
elif "GNU gold" in stdout:
kind = "gold"
elif "LLD" in stdout:
kind = "lld"
else:
kind = "unknown"
return namespace(
KIND=kind,
LINKER_FLAG=linker_flag,
)
result = try_linker(linker)
if result is None and linker:
die("Could not use {} as linker".format(linker))
if (
linker is None
and enable_gold.origin == "default"
and developer_options
and (result is None or result.KIND in ("bfd", "gold"))
):
# try and use lld if available.
tried = try_linker("lld")
if (result is None or result.KIND != "gold") and (
tried is None or tried.KIND != "lld"
):
tried = try_linker("gold")
if tried is None or tried.KIND != "gold":
tried = None
if tried:
result = tried
if result is None:
die("Failed to find a linker")
# If an explicit linker was given, error out if what we found is different.
if linker and not linker.startswith(result.KIND):
die("Could not use {} as linker".format(linker))
return result
set_config("LINKER_KIND", select_linker.KIND)
@depends_if(select_linker, macos_sdk, sysroot_path, multiarch_dir)
def linker_ldflags(linker, macos_sdk, sysroot_path, multiarch_dir):
flags = list((linker and linker.LINKER_FLAG) or [])
if macos_sdk:
if linker and linker.KIND == "ld64":
flags.append("-Wl,-syslibroot,%s" % macos_sdk)
else:
flags.append("-Wl,--sysroot=%s" % macos_sdk)
if sysroot_path and multiarch_dir:
# Non-Debian-patched binutils linkers (both BFD and gold) don't lookup
# in multi-arch directories.
flags.append(
"-Wl,-rpath-link,%s" % os.path.join(sysroot_path, "lib", multiarch_dir)
)
flags.append(
"-Wl,-rpath-link,%s"
% os.path.join(sysroot_path, "usr", "lib", multiarch_dir)
)
return flags
add_old_configure_assignment("LINKER_LDFLAGS", linker_ldflags)
# There's a wrinkle with MinGW: linker configuration is not enabled, so
# `select_linker` is never invoked. Hard-code around it.
@depends(select_linker, target, c_compiler)
def gcc_use_gnu_ld(select_linker, target, c_compiler):
if select_linker is not None:
return select_linker.KIND in ("bfd", "gold", "lld")
if target.kernel == "WINNT" and c_compiler.type == "clang":
return True
return None
# GCC_USE_GNU_LD=1 means the linker is command line compatible with GNU ld.
set_config("GCC_USE_GNU_LD", gcc_use_gnu_ld)
add_old_configure_assignment("GCC_USE_GNU_LD", gcc_use_gnu_ld)
# Assembler detection
# ==============================================================
option(env="AS", nargs=1, help="Path to the assembler")
@depends(target, c_compiler)
def as_info(target, c_compiler):
if c_compiler.type == "clang-cl":
ml = {
"x86": "ml.exe",
"x86_64": "ml64.exe",
"aarch64": "armasm64.exe",
}.get(target.cpu)
return namespace(type="masm", names=(ml,))
# When building with anything but clang-cl, we just use the C compiler as the assembler.
return namespace(type="gcc", names=(c_compiler.compiler,))
# One would expect the assembler to be specified merely as a program. But in
# cases where the assembler is passed down into js/, it can be specified in
# the same way as CC: a program + a list of argument flags. We might as well
# permit the same behavior in general, even though it seems somewhat unusual.
# So we have to do the same sort of dance as we did above with
# `provided_compiler`.
provided_assembler = provided_program("AS")
assembler = check_prog(
"_AS",
input=provided_assembler.program,
what="the assembler",
progs=as_info.names,
paths=vc_toolchain_search_path,
)
@depends(as_info, assembler, provided_assembler, c_compiler)
def as_with_flags(as_info, assembler, provided_assembler, c_compiler):
if provided_assembler:
return provided_assembler.wrapper + [assembler] + provided_assembler.flags
if as_info.type == "masm":
return assembler
assert as_info.type == "gcc"
# Need to add compiler wrappers and flags as appropriate.
return c_compiler.wrapper + [assembler] + c_compiler.flags
add_old_configure_assignment("AS", as_with_flags)
add_old_configure_assignment("ac_cv_prog_AS", as_with_flags)
@depends(assembler, c_compiler, extra_toolchain_flags)
@imports("subprocess")
@imports(_from="os", _import="devnull")
def gnu_as(assembler, c_compiler, toolchain_flags):
# clang uses a compatible GNU assembler.
if c_compiler.type == "clang":
return True
if c_compiler.type == "gcc":
cmd = [assembler] + c_compiler.flags
if toolchain_flags:
cmd += toolchain_flags
cmd += ["-Wa,--version", "-c", "-o", devnull, "-x", "assembler", "-"]
# We don't actually have to provide any input on stdin, `Popen.communicate` will
# close the stdin pipe.
# clang will error if it uses its integrated assembler for this target,
# so handle failures gracefully.
if "GNU" in check_cmd_output(*cmd, stdin=subprocess.PIPE, onerror=lambda: ""):
return True
set_config("GNU_AS", gnu_as)
add_old_configure_assignment("GNU_AS", gnu_as)
@depends(as_info, target)
def as_dash_c_flag(as_info, target):
# armasm64 doesn't understand -c.
if as_info.type == "masm" and target.cpu == "aarch64":
return ""
else:
return "-c"
set_config("AS_DASH_C_FLAG", as_dash_c_flag)
@depends(as_info, target)
def as_outoption(as_info, target):
# The uses of ASOUTOPTION depend on the spacing for -o/-Fo.
if as_info.type == "masm" and target.cpu != "aarch64":
return "-Fo"
return "-o "
set_config("ASOUTOPTION", as_outoption)
# clang plugin handling
# ==============================================================
option(
"--enable-clang-plugin",
env="ENABLE_CLANG_PLUGIN",
help="Enable building with the Clang plugin (gecko specific static analyzers)",
)
add_old_configure_assignment(
"ENABLE_CLANG_PLUGIN", depends_if("--enable-clang-plugin")(lambda _: True)
)
@depends(host_c_compiler, c_compiler, when="--enable-clang-plugin")
def llvm_config(host_c_compiler, c_compiler):
clang = None
for compiler in (host_c_compiler, c_compiler):
if compiler and compiler.type == "clang":
clang = compiler.compiler
break
elif compiler and compiler.type == "clang-cl":
clang = os.path.join(os.path.dirname(compiler.compiler), "clang")
break
if not clang:
die("Cannot --enable-clang-plugin when not building with clang")
llvm_config = "llvm-config"
out = check_cmd_output(clang, "--print-prog-name=llvm-config", onerror=lambda: None)
if out:
llvm_config = out.rstrip()
return (llvm_config,)
llvm_config = check_prog(
"LLVM_CONFIG",
llvm_config,
what="llvm-config",
when="--enable-clang-plugin",
paths=clang_search_path,
)
add_old_configure_assignment("LLVM_CONFIG", llvm_config)
option(
"--enable-clang-plugin-alpha",
env="ENABLE_CLANG_PLUGIN_ALPHA",
help="Enable static analysis with clang-plugin alpha checks.",
)
@depends("--enable-clang-plugin", "--enable-clang-plugin-alpha")
def check_clang_plugin_alpha(enable_clang_plugin, enable_clang_plugin_alpha):
if enable_clang_plugin_alpha:
if enable_clang_plugin:
return True
die("Cannot enable clang-plugin alpha checkers without --enable-clang-plugin.")
add_old_configure_assignment("ENABLE_CLANG_PLUGIN_ALPHA", check_clang_plugin_alpha)
set_define("MOZ_CLANG_PLUGIN_ALPHA", check_clang_plugin_alpha)
option(
"--enable-mozsearch-plugin",
env="ENABLE_MOZSEARCH_PLUGIN",
help="Enable building with the mozsearch indexer plugin",
)
add_old_configure_assignment(
"ENABLE_MOZSEARCH_PLUGIN", depends_if("--enable-mozsearch-plugin")(lambda _: True)
)
# Libstdc++ compatibility hacks
# ==============================================================
#
option(
"--enable-stdcxx-compat",
env="MOZ_STDCXX_COMPAT",
help="Enable compatibility with older libstdc++",
)
@template
def libstdcxx_version(var, compiler):
@depends(compiler, when="--enable-stdcxx-compat")
@checking(var, lambda v: v and "GLIBCXX_%s" % v.dotted)
@imports(_from="mozbuild.configure.libstdcxx", _import="find_version")
@imports(_from="__builtin__", _import="Exception")
def version(compiler):
try:
result = find_version(
compiler.wrapper + [compiler.compiler] + compiler.flags
)
except Exception:
die("Couldn't determine libstdc++ version")
if result:
return namespace(
dotted=result[0],
encoded=str(result[1]),
)
set_config(var, version.encoded)
return version
add_gcc_flag(
"-D_GLIBCXX_USE_CXX11_ABI=0",
cxx_compiler,
when=libstdcxx_version("MOZ_LIBSTDCXX_TARGET_VERSION", cxx_compiler),
)
add_gcc_flag(
"-D_GLIBCXX_USE_CXX11_ABI=0",
host_cxx_compiler,
when=libstdcxx_version("MOZ_LIBSTDCXX_HOST_VERSION", host_cxx_compiler),
)
# Support various fuzzing options
# ==============================================================
option("--enable-fuzzing", help="Enable fuzzing support")
@depends("--enable-fuzzing")
def enable_fuzzing(value):
if value:
return True
@depends(
try_compile(
body="__AFL_COMPILER;", check_msg="for AFL compiler", when="--enable-fuzzing"
)
)
def enable_aflfuzzer(afl):
if afl:
return True
@depends(enable_fuzzing, enable_aflfuzzer, c_compiler, target)
def enable_libfuzzer(fuzzing, afl, c_compiler, target):
if fuzzing and not afl and c_compiler.type == "clang" and target.os != "Android":
return True
@depends(enable_fuzzing, enable_aflfuzzer, enable_libfuzzer)
def enable_fuzzing_interfaces(fuzzing, afl, libfuzzer):
if fuzzing and (afl or libfuzzer):
return True
set_config("FUZZING", enable_fuzzing)
set_define("FUZZING", enable_fuzzing)
set_config("LIBFUZZER", enable_libfuzzer)
set_define("LIBFUZZER", enable_libfuzzer)
add_old_configure_assignment("LIBFUZZER", enable_libfuzzer)
set_config("FUZZING_INTERFACES", enable_fuzzing_interfaces)
set_define("FUZZING_INTERFACES", enable_fuzzing_interfaces)
add_old_configure_assignment("FUZZING_INTERFACES", enable_fuzzing_interfaces)
@depends(
c_compiler.try_compile(
flags=["-fsanitize=fuzzer-no-link"],
when=enable_fuzzing,
check_msg="whether the C compiler supports -fsanitize=fuzzer-no-link",
),
tsan,
)
def libfuzzer_flags(value, tsan):
if tsan:
# With ThreadSanitizer, we should not use any libFuzzer instrumentation because
# it is incompatible (e.g. there are races on global sanitizer coverage counters).
# Instead we use an empty set of flags here but still build the fuzzing targets.
# With this setup, we can still run files through these targets in TSan builds,
# e.g. those obtained from regular fuzzing.
# This code can be removed once libFuzzer has been made compatible with TSan.
#
# Also, this code needs to be kept in sync with certain gyp files, currently:
# - dom/media/webrtc/transport/third_party/nICEr/nicer.gyp
return namespace(no_link_flag_supported=False, use_flags=[])
if value:
no_link_flag_supported = True
# recommended for (and only supported by) clang >= 6
use_flags = ["-fsanitize=fuzzer-no-link"]
else:
no_link_flag_supported = False
use_flags = ["-fsanitize-coverage=trace-pc-guard,trace-cmp"]
return namespace(
no_link_flag_supported=no_link_flag_supported,
use_flags=use_flags,
)
set_config("HAVE_LIBFUZZER_FLAG_FUZZER_NO_LINK", libfuzzer_flags.no_link_flag_supported)
set_config("LIBFUZZER_FLAGS", libfuzzer_flags.use_flags)
add_old_configure_assignment("LIBFUZZER_FLAGS", libfuzzer_flags.use_flags)
# Shared library building
# ==============================================================
# XXX: The use of makefile constructs in these variables is awful.
@depends(target, c_compiler)
def make_shared_library(target, compiler):
if target.os == "WINNT":
if compiler.type == "gcc":
return namespace(
mkshlib=["$(CXX)", "$(DSO_LDOPTS)", "-o", "$@"],
mkcshlib=["$(CC)", "$(DSO_LDOPTS)", "-o", "$@"],
)
elif compiler.type == "clang":
return namespace(
mkshlib=[
"$(CXX)",
"$(DSO_LDOPTS)",
"-Wl,-pdb,$(LINK_PDBFILE)",
"-o",
"$@",
],
mkcshlib=[
"$(CC)",
"$(DSO_LDOPTS)",
"-Wl,-pdb,$(LINK_PDBFILE)",
"-o",
"$@",
],
)
else:
linker = [
"$(LINKER)",
"-NOLOGO",
"-DLL",
"-OUT:$@",
"-PDB:$(LINK_PDBFILE)",
"$(DSO_LDOPTS)",
]
return namespace(
mkshlib=linker,
mkcshlib=linker,
)
cc = ["$(CC)", "$(COMPUTED_C_LDFLAGS)"]
cxx = ["$(CXX)", "$(COMPUTED_CXX_LDFLAGS)"]
flags = ["$(PGO_CFLAGS)", "$(DSO_PIC_CFLAGS)", "$(DSO_LDOPTS)"]
output = ["-o", "$@"]
if target.kernel == "Darwin":
soname = []
elif target.os == "NetBSD":
soname = ["-Wl,-soname,$(DSO_SONAME)"]
else:
assert compiler.type in ("gcc", "clang")
soname = ["-Wl,-h,$(DSO_SONAME)"]
return namespace(
mkshlib=cxx + flags + soname + output,
mkcshlib=cc + flags + soname + output,
)
set_config("MKSHLIB", make_shared_library.mkshlib)
set_config("MKCSHLIB", make_shared_library.mkcshlib)
@depends(c_compiler, toolchain_prefix, when=target_is_windows)
def rc_names(c_compiler, toolchain_prefix):
if c_compiler.type in ("gcc", "clang"):
return tuple("%s%s" % (p, "windres") for p in ("",) + (toolchain_prefix or ()))
return ("llvm-rc",)
check_prog("RC", rc_names, paths=clang_search_path, when=target_is_windows)
@depends(toolchain_prefix, c_compiler)
def ar_config(toolchain_prefix, c_compiler):
if c_compiler.type == "clang-cl":
return namespace(
names=("llvm-lib",),
flags=("-llvmlibthin", "-out:$@"),
)
names = tuple("%s%s" % (p, "ar") for p in (toolchain_prefix or ()) + ("",))
if c_compiler.type == "clang":
# Get the llvm-ar path as per the output from clang --print-prog-name=llvm-ar
# so that we directly get the one under the clang directory, rather than one
# that might be in /usr/bin and that might point to one from a different version
# of clang.
out = check_cmd_output(
c_compiler.compiler, "--print-prog-name=llvm-ar", onerror=lambda: None
)
llvm_ar = out.rstrip() if out else "llvm-ar"
names = (llvm_ar,) + names
return namespace(
names=names,
flags=("crs", "$@"),
)
ar = check_prog("AR", ar_config.names, paths=clang_search_path)
add_old_configure_assignment("AR", ar)
set_config("AR_FLAGS", ar_config.flags)
@depends(toolchain_prefix, c_compiler)
def nm_names(toolchain_prefix, c_compiler):
names = tuple("%s%s" % (p, "nm") for p in (toolchain_prefix or ()) + ("",))
if c_compiler.type == "clang":
# Get the llvm-nm path as per the output from clang --print-prog-name=llvm-nm
# so that we directly get the one under the clang directory, rather than one
# that might be in /usr/bin and that might point to one from a different version
# of clang.
out = check_cmd_output(
c_compiler.compiler, "--print-prog-name=llvm-nm", onerror=lambda: None
)
llvm_nm = out.rstrip() if out else "llvm-nm"
names = (llvm_nm,) + names
return names
check_prog("NM", nm_names, paths=clang_search_path, when=target_is_linux)
option("--enable-cpp-rtti", help="Enable C++ RTTI")
add_old_configure_assignment("_MOZ_USE_RTTI", "1", when="--enable-cpp-rtti")
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