# -*- 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/. # PGO # ============================================================== option(env='MOZ_PGO', help='Build with profile guided optimizations') set_config('MOZ_PGO', depends('MOZ_PGO')(lambda x: bool(x))) add_old_configure_assignment('MOZ_PGO', depends('MOZ_PGO')(lambda x: bool(x))) # yasm detection # ============================================================== yasm = check_prog('YASM', ['yasm'], allow_missing=True) @depends_if(yasm) @checking('yasm version') def yasm_version(yasm): version = check_cmd_output( yasm, '--version', onerror=lambda: die('Failed to get yasm version.') ).splitlines()[0].split()[1] return Version(version) # Until we move all the yasm consumers out of old-configure. # bug 1257904 add_old_configure_assignment('_YASM_MAJOR_VERSION', delayed_getattr(yasm_version, 'major')) add_old_configure_assignment('_YASM_MINOR_VERSION', delayed_getattr(yasm_version, 'minor')) @depends(yasm, target) def yasm_asflags(yasm, target): if yasm: asflags = { ('OSX', 'x86'): '-f macho32', ('OSX', 'x86_64'): '-f macho64', ('WINNT', 'x86'): '-f win32', ('WINNT', 'x86_64'): '-f x64', }.get((target.os, target.cpu), None) if asflags is None: # We're assuming every x86 platform we support that's # not Windows or Mac is ELF. if target.cpu == 'x86': asflags = '-f elf32' elif target.cpu == 'x86_64': asflags = '-f elf64' if asflags: asflags += ' -rnasm -pnasm' return asflags set_config('YASM_ASFLAGS', yasm_asflags) @depends(yasm_asflags) def have_yasm(value): if value: return True set_config('HAVE_YASM', have_yasm) # Until the YASM variable is not necessary in old-configure. add_old_configure_assignment('YASM', have_yasm) @dependable def extra_toolchain_flags(): # This value will be overriden for android builds, where # extra flags are required to do basic checks. return [] # Android NDK # ============================================================== @depends('--disable-compile-environment', build_project, gonkdir, '--help') def compiling_android(compile_env, build_project, gonkdir, _): return compile_env and (gonkdir or build_project in ('mobile/android', 'js')) include_when('android-ndk.configure', when=compiling_android) # 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='10.7', help='Set the minimum MacOS version needed at runtime') @depends('--enable-macos-target', target) @imports(_from='os', _import='environ') def macos_target(value, target): if value and target.os == 'OSX': # Ensure every compiler process we spawn uses this value. environ['MACOSX_DEPLOYMENT_TARGET'] = value[0] return value[0] if value and value.origin != 'default': die('--enable-macos-target cannot be used when targeting %s', target.os) set_config('MACOSX_DEPLOYMENT_TARGET', macos_target) add_old_configure_assignment('MACOSX_DEPLOYMENT_TARGET', macos_target) # Compiler wrappers # ============================================================== # Normally, we'd use js_option and automatically have those variables # propagated to js/src, but things are complicated by possible additional # wrappers in CC/CXX, and by other subconfigures that do not handle those # options and do need CC/CXX altered. 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) @depends_if(ccache) def using_ccache(ccache): return True set_config('MOZ_USING_CCACHE', using_ccache) @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) add_old_configure_assignment('COMPILER_WRAPPER', compiler_wrapper) @depends_if(compiler_wrapper) def using_compiler_wrapper(compiler_wrapper): return True set_config('MOZ_USING_COMPILER_WRAPPER', using_compiler_wrapper) # Cross-compilation related things. # ============================================================== js_option('--with-toolchain-prefix', env='TOOLCHAIN_PREFIX', nargs=1, help='Prefix for the target toolchain') @depends('--with-toolchain-prefix', target, host, cross_compiling) def toolchain_prefix(value, target, host, cross_compiling): if value: return value[0] # Special case x86-64 <-> x86 cross compiling until we have the right tests # in moz.configure land. if cross_compiling and not all(i.cpu in ('x86_64', 'x86') for i in (target, host)): return '%s-' % target.toolchain set_config('TOOLCHAIN_PREFIX', toolchain_prefix) add_old_configure_assignment('TOOLCHAIN_PREFIX', toolchain_prefix) # Compilers # ============================================================== include('compilers-util.configure') def try_preprocess(compiler, language, source): return try_invoke_compiler(compiler, language, source, ['-E']) @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='textwrap', _import='dedent') 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 (msvc, clang-cl, clang or gcc) - the compiler version - the compiler supported language - the compiler supported language version ''' # Note: MSVC doesn't expose __STDC_VERSION__. It does expose __STDC__, # but only when given the -Za option, which disables compiler # extensions. # Note: We'd normally do a version check for clang, but versions of clang # in Xcode have a completely different versioning scheme despite exposing # the version with the same defines. # So instead, we make things such that the version is missing when the # clang used is below the minimum supported version (currently clang 3.6). # We then only include the version information when the C++ compiler # matches the feature check, so that an unsupported version of clang would # have no version number. check = dedent('''\ #if defined(_MSC_VER) #if defined(__clang__) %COMPILER "clang-cl" %VERSION _MSC_FULL_VER #else %COMPILER "msvc" %VERSION _MSC_FULL_VER #endif #elif defined(__clang__) %COMPILER "clang" # if !__cplusplus || __has_feature(cxx_alignof) %VERSION __clang_major__.__clang_minor__.__clang_patchlevel__ # endif #elif defined(__GNUC__) %COMPILER "gcc" %VERSION __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__ #endif #if __cplusplus %cplusplus __cplusplus #elif __STDC_VERSION__ %STDC_VERSION __STDC_VERSION__ #elif __STDC__ %STDC_VERSION 198900L #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), ): for n, (value, condition) in enumerate(preprocessor_checks.iteritems()): 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, except MSVC, which only supports little endian. check += dedent('''\ #if _MSC_VER || __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(b'%'): 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: 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 and type in ('msvc', 'clang-cl'): msc_ver = version version = msc_ver[0:2] if len(msc_ver) > 2: version += '.' + msc_ver[2:4] if len(msc_ver) > 4: version += '.' + msc_ver[4:] if version: version = Version(version) return namespace( type=type, version=version, cpu=data.get('CPU'), kernel=data.get('KERNEL'), endianness=data.get('ENDIANNESS'), language='C++' if cplusplus else 'C', language_version=cplusplus if cplusplus else stdc_version, ) @imports(_from='mozbuild.shellutil', _import='quote') def check_compiler(compiler, language, target): info = get_compiler_info(compiler, language) flags = [] def append_flag(flag): if flag not in flags: if info.type == 'clang-cl': flags.append('-Xclang') flags.append(flag) # 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 in ('clang-cl', 'clang', 'gcc'): append_flag('-std=gnu99') # Note: MSVC, while supporting C++11, still reports 199711L for __cplusplus. # Note: this is a strict version check because we used to always add # -std=gnu++11. if info.language == 'C++': if info.type in ('clang', 'gcc') and info.language_version != 201103: append_flag('-std=gnu++11') # MSVC 2015 headers include C++14 features, but don't guard them # with appropriate checks. if info.type == 'clang-cl' and info.language_version != 201402: append_flag('-std=c++14') # We force clang-cl to emulate Visual C++ 2015 Update 2 with fallback to # cl.exe. if info.type == 'clang-cl' and info.version != '19.00.23918': # Those flags are direct clang-cl flags that don't need -Xclang, add # them directly. flags.append('-fms-compatibility-version=19.00.23918') flags.append('-fallback') # Check compiler target # -------------------------------------------------------------------- if not info.cpu or info.cpu != target.cpu: if info.type == 'clang': append_flag('--target=%s' % target.toolchain) elif info.type == 'gcc': same_arch_different_bits = ( ('x86', 'x86_64'), ('ppc', 'ppc64'), ('sparc', 'sparc64'), ) if (target.cpu, info.cpu) in same_arch_different_bits: append_flag('-m32') elif (info.cpu, target.cpu) in same_arch_different_bits: append_flag('-m64') if not info.kernel or info.kernel != target.kernel: if info.type == 'clang': append_flag('--target=%s' % target.toolchain) if not info.endianness or info.endianness != target.endianness: if info.type == 'clang': append_flag('--target=%s' % target.toolchain) return namespace( type=info.type, version=info.version, target_cpu=info.cpu, target_kernel=info.kernel, target_endianness=info.endianness, flags=flags, ) @imports(_from='collections', _import='defaultdict') @imports(_from='__builtin__', _import='sorted') def get_vc_paths(base): vc = defaultdict(lambda: defaultdict(dict)) subkey = r'Microsoft\VisualStudio\VC\*\*\*\Compiler' for v, h, t, p in get_registry_values(base + '\\' + subkey): vc[v][h][t] = p if not vc: return version, data = sorted(vc.iteritems(), key=lambda x: Version(x[0]))[-1] return data @depends(host) @imports('platform') def vc_compiler_path(host): if host.kernel != 'WINNT': return vc_host = { 'x86': 'x86', 'AMD64': 'x64', }.get(platform.machine()) if vc_host is None: return vc_target = { 'x86': 'x86', 'x86_64': 'x64', 'arm': 'arm', }.get(host.cpu) if vc_target is None: return base_key = r'HKEY_LOCAL_MACHINE\SOFTWARE' data = get_vc_paths(base_key) if not data: data = get_vc_paths(base_key + r'\Wow6432Node') if not data: return path = data.get(vc_host, {}).get(vc_target) if not path and vc_host == 'x64': vc_host = 'x86' path = data.get(vc_host, {}).get(vc_target) if not path: return path = os.path.dirname(path) if vc_host != vc_target: other_path = data.get(vc_host, {}).get(vc_host) if other_path: return (path, os.path.dirname(other_path)) return (path,) @depends(vc_compiler_path) @imports('os') def toolchain_search_path(vc_compiler_path): if vc_compiler_path: result = [os.environ.get('PATH')] result.extend(vc_compiler_path) # We're going to alter PATH for good in windows.configure, but we also # need to do it for the valid_compiler() check below. os.environ['PATH'] = os.pathsep.join(result) return result @template def default_c_compilers(host_or_target): '''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. ''' assert host_or_target in (host, target) @depends(host_or_target, host, toolchain_prefix) def default_c_compilers(host_or_target, host, toolchain_prefix): if host_or_target.kernel == 'WINNT': return ('cl', 'clang-cl', 'gcc', 'clang') if host_or_target.kernel == 'Darwin': return ('clang',) if host_or_target != host: # cross compilation return ('%sgcc' % toolchain_prefix, 'gcc', 'clang') return ('gcc', 'clang') return default_c_compilers @template def default_cxx_compilers(c_compiler): '''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. ''' @depends(c_compiler) def default_cxx_compilers(c_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 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 assert host_or_target == target or other_compiler assert language == 'C' or host_or_target == target or other_c_compiler host_or_target_str = { host: 'host', target: 'target', }[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), 'C++': lambda: default_cxx_compilers(c_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. @depends_if(var) @imports(_from='itertools', _import='takewhile') @imports(_from='mozbuild.shellutil', _import='split', _as='shell_split') def provided_compiler(cmd): # Historically, the compiler variables have contained more than the # path to the compiler itself. So for backwards compatibility, try to # find what is what in there, assuming the first dash-prefixed item is # a compiler option, the item before that is the compiler, and anything # before that is a compiler wrapper. cmd = shell_split(cmd[0]) without_flags = list(takewhile(lambda x: not x.startswith('-'), cmd)) return namespace( wrapper=without_flags[:-1], compiler=without_flags[-1], flags=cmd[len(without_flags):], ) # Derive the host compiler from the corresponding target compiler when no # explicit compiler was given and we're not cross compiling. For the C++ # compiler, though, prefer to derive from the host C compiler when it # doesn't match the target C compiler. # As a special case, since clang supports all kinds of targets in the same # executable, when cross compiling with clang, default to the same compiler # as the target compiler, resetting flags. if host_or_target == host: args = (c_compiler, other_c_compiler) if other_c_compiler else () @depends(provided_compiler, other_compiler, cross_compiling, *args) def provided_compiler(value, other_compiler, cross_compiling, *args): if value: return value c_compiler, other_c_compiler = args if args else (None, None) if not cross_compiling and c_compiler == other_c_compiler: return other_compiler if cross_compiling and other_compiler.type == 'clang': return namespace(**{ k: [] if k == 'flags' else v for k, v in other_compiler.__dict__.iteritems() }) # 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=delayed_getattr(provided_compiler, 'compiler'), paths=toolchain_search_path) @depends(compiler, provided_compiler, compiler_wrapper, host_or_target) @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): wrapper = list(compiler_wrapper 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 = provided_compiler.flags else: flags = [] # Ideally, we'd always use the absolute path, but unfortunately, on # Windows, the compiler is very often in a directory containing spaces. # Unfortunately, due to the way autoconf does its compiler tests with # eval, that doesn't work out. So in that case, check that the # compiler can still be found in $PATH, and use the file name instead # of the full path. if quote(compiler) != compiler: full_path = os.path.abspath(compiler) compiler = os.path.basename(compiler) found_compiler = find_program(compiler) if not found_compiler: die('%s is not in your $PATH' % quote(os.path.dirname(full_path))) if os.path.normcase(find_program(compiler)) != os.path.normcase( full_path): die('Found `%s` before `%s` in your $PATH. ' 'Please reorder your $PATH.', quote(os.path.dirname(found_compiler)), quote(os.path.dirname(full_path))) 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 info.flags: flags += info.flags info = check_compiler(wrapper + [compiler] + flags, language, host_or_target) 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)) if info.flags: raise FatalCheckError( 'Unknown compiler or compiler not supported.') # 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' and info.version < '4.8.0': raise FatalCheckError( 'Only GCC 4.8 or newer is supported (found version %s).' % info.version) # If you want to bump the version check here search for # __cpp_static_assert above, and see the associated comment. if info.type == 'clang' and not info.version: raise FatalCheckError( 'Only clang/llvm 3.6 or newer is supported.') if info.type == 'msvc': if info.version < '19.00.23918': raise FatalCheckError( 'This version (%s) of the MSVC compiler is not ' 'supported.\n' 'You must install Visual C++ 2015 Update 2 or newer in ' 'order to build.\n' 'See https://developer.mozilla.org/en/' 'Windows_Build_Prerequisites' % info.version) 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))) # 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': add_old_configure_assignment( '%s_TYPE' % var, delayed_getattr(valid_compiler, 'type')) add_old_configure_assignment( '%s_VERSION' % var, delayed_getattr(valid_compiler, 'version')) valid_compiler = compiler_class(valid_compiler) 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 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 == 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) 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. non_msvc_compiler = depends(c_compiler)(lambda info: info.type != 'msvc') building_with_gcc = depends(c_compiler)(lambda info: info.type == 'gcc') include('compile-checks.configure') @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(c_compiler) def default_debug_flags(compiler_info): # Debug info is ON by default. if compiler_info.type in ('msvc', 'clang-cl'): return '-Zi' 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)) js_option('--enable-debug-symbols', nargs='?', default=True, help='Enable 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) # 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. @depends(c_compiler, target) def libcxx_inline_visibility(c_compiler, target): if c_compiler.type == 'clang' and target.os == 'Android': return '' set_define('_LIBCPP_INLINE_VISIBILITY', libcxx_inline_visibility) set_define('_LIBCPP_INLINE_VISIBILITY_EXCEPT_GCC49', libcxx_inline_visibility) @depends(c_compiler, target, check_build_environment) def visibility_flags(c_compiler, 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) include('windows.configure') include('rust.configure')