1# Copyright (c) 2013 The Chromium Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5import("//build/config/c++/c++.gni") 6import("//build/config/mac/mac_sdk.gni") 7import("//build/config/mac/symbols.gni") 8import("//build/config/sysroot.gni") 9 10# This is included by reference in the //build/config/compiler config that 11# is applied to all targets. It is here to separate out the logic. 12config("compiler") { 13 # These flags are shared between the C compiler and linker. 14 common_mac_flags = [] 15 16 # CPU architecture. 17 if (current_cpu == "x64") { 18 common_mac_flags += [ 19 "-arch", 20 "x86_64", 21 ] 22 } else if (current_cpu == "x86") { 23 common_mac_flags += [ 24 "-arch", 25 "i386", 26 ] 27 } 28 29 # This is here so that all files get recompiled after an Xcode update. 30 # (defines are passed via the command line, and build system rebuild things 31 # when their commandline changes). Nothing should ever read this define. 32 defines = [ "CR_XCODE_VERSION=$xcode_version" ] 33 34 defines += [ 35 "_LIBCPP_CONFIG_SITE", 36 "_LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT=0", 37 ] 38 39 asmflags = common_mac_flags 40 cflags = common_mac_flags 41 42 # Without this, the constructors and destructors of a C++ object inside 43 # an Objective C struct won't be called, which is very bad. 44 cflags_objcc = [ "-fobjc-call-cxx-cdtors" ] 45 46 ldflags = common_mac_flags 47 48 # Create a new read-only segment for protected memory. The default segments 49 # (__TEXT and __DATA) are mapped read-execute and read-write by default. 50 ldflags += [ 51 "-segprot", 52 "PROTECTED_MEMORY", 53 "rw", 54 "r", 55 ] 56 57 if (save_unstripped_output) { 58 ldflags += [ "-Wcrl,unstripped," + rebase_path(root_out_dir) ] 59 } 60 61 if (export_libcxxabi_from_executables) { 62 ldflags += [ "-Wl,-undefined,dynamic_lookup" ] 63 } 64} 65 66# This is included by reference in the //build/config/compiler:runtime_library 67# config that is applied to all targets. It is here to separate out the logic 68# that is Mac-only. Please see that target for advice on what should go in 69# :runtime_library vs. :compiler. 70config("runtime_library") { 71 common_flags = [ 72 "-isysroot", 73 sysroot, 74 "-mmacosx-version-min=$mac_deployment_target", 75 ] 76 77 asmflags = common_flags 78 cflags = common_flags 79 ldflags = common_flags 80 framework_dirs = [ sysroot ] 81 82 # Prevent Mac OS X AssertMacros.h (included by system header) from defining 83 # macros that collide with common names, like 'check', 'require', and 84 # 'verify'. 85 # http://opensource.apple.com/source/CarbonHeaders/CarbonHeaders-18.1/AssertMacros.h 86 defines = [ "__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0" ] 87} 88 89# On Mac, this is used for everything except static libraries. 90config("mac_dynamic_flags") { 91 ldflags = [ "-Wl,-ObjC" ] # Always load Objective-C categories and classes. 92 93 if (is_component_build) { 94 ldflags += [ 95 # Path for loading shared libraries for unbundled binaries. 96 "-Wl,-rpath,@loader_path/.", 97 98 # Path for loading shared libraries for bundled binaries. Get back from 99 # Binary.app/Contents/MacOS. 100 "-Wl,-rpath,@loader_path/../../..", 101 ] 102 } 103} 104 105# The ldflags referenced below are handled by 106# //build/toolchain/mac/linker_driver.py. 107# Remove this config if a target wishes to change the arguments passed to the 108# strip command during linking. This config by default strips all symbols 109# from a binary, but some targets may wish to specify an exports file to 110# preserve specific symbols. 111config("strip_all") { 112 if (enable_stripping) { 113 ldflags = [ "-Wcrl,strip,-x,-S" ] 114 } 115} 116