# Copyright 2014 The Chromium Authors. All rights reserved. # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. import("//build/config/android/config.gni") import("//build/config/sanitizers/sanitizers.gni") import("//build/config/sysroot.gni") assert(is_android) use_gold = current_cpu == "x86" || current_cpu == "x64" || current_cpu == "arm" # This is included by reference in the //build/config/compiler config that # is applied to all targets. It is here to separate out the logic that is # Android-only. config("compiler") { cflags = [ "-ffunction-sections", "-fno-short-enums", ] defines = [ "ANDROID", # The NDK has these things, but doesn't define the constants to say that it # does. Define them here instead. "HAVE_SYS_UIO_H", ] ldflags = [] if (!is_clang) { # Clang doesn't support these flags. cflags += [ "-finline-limit=64" ] } if (is_clang) { rebased_android_toolchain_root = rebase_path(android_toolchain_root, root_build_dir) assert(rebased_android_toolchain_root != "") # Mark as used. if (current_cpu == "mipsel") { cflags += [ # TODO(gordanac) Enable integrated-as. "-no-integrated-as", "-B${rebased_android_toolchain_root}/bin", # Else /usr/bin/as gets picked up. ] } } # Use gold for Android for most CPU architectures. if (use_gold) { ldflags += [ "-fuse-ld=gold" ] if (is_clang) { # Let clang find the ld.gold in the NDK. ldflags += [ "--gcc-toolchain=$rebased_android_toolchain_root" ] } # Use -mstackrealign due to a bug on ia32 Jelly Bean. # See crbug.com/521527 if (current_cpu == "x86") { cflags += [ "-mstackrealign" ] } } if (current_cpu == "mipsel" && is_clang) { # Let clang find the ld.bfd in the NDK. ldflags += [ "--gcc-toolchain=$rebased_android_toolchain_root" ] } ldflags += [ "-Wl,--build-id=sha1", "-Wl,--no-undefined", # Don't allow visible symbols from libgcc or libc++ to be # re-exported. "-Wl,--exclude-libs=libgcc.a", "-Wl,--exclude-libs=libc++_static.a", # Don't allow visible symbols from libraries that contain # assembly code with symbols that aren't hidden properly. # http://crbug.com/448386 "-Wl,--exclude-libs=libvpx_assembly_arm.a", ] if (current_cpu == "arm" && !use_order_profiling) { ldflags += [ # Enable identical code folding to reduce size. "-Wl,--icf=all", ] } if (is_clang) { if (current_cpu == "arm") { abi_target = "arm-linux-androideabi" } else if (current_cpu == "x86") { abi_target = "i686-linux-androideabi" } else if (current_cpu == "arm64") { # Place holder for arm64 support, not tested. # TODO: Enable clang support for Android Arm64. http://crbug.com/539781 abi_target = "aarch64-linux-android" } else if (current_cpu == "x64") { # Place holder for x64 support, not tested. # TODO: Enable clang support for Android x64. http://crbug.com/539781 abi_target = "x86_64-linux-androideabi" } else if (current_cpu == "mipsel") { abi_target = "mipsel-linux-android" } else if (current_cpu == "mips64el") { # Place holder for mips64 support, not tested. abi_target = "mips64el-linux-androideabi" } else { assert(false, "Architecture not supported") } cflags += [ "--target=$abi_target" ] ldflags += [ "--target=$abi_target" ] } # Assign any flags set for the C compiler to asmflags so that they are sent # to the assembler. asmflags = cflags } # This is included by reference in the //build/config/compiler:runtime_library # config that is applied to all targets. It is here to separate out the logic # that is Android-only. Please see that target for advice on what should go in # :runtime_library vs. :compiler. config("runtime_library") { # NOTE: The libc++ header include paths below are specified in cflags_cc # rather than include_dirs because they need to come after include_dirs. # Think of them like system headers, but don't use '-isystem' because the # arm-linux-androideabi-4.4.3 toolchain (circa Gingerbread) will exhibit # strange errors. The include ordering here is important; change with # caution. cflags_cc = [ "-isystem" + rebase_path("$android_libcpp_root/libcxx/include", root_build_dir), "-isystem" + rebase_path( "$android_ndk_root/sources/cxx-stl/llvm-libc++abi/libcxxabi/include", root_build_dir), "-isystem" + rebase_path("$android_ndk_root/sources/android/support/include", root_build_dir), ] defines = [ "__GNU_SOURCE=1" ] # Necessary for clone(). ldflags = [ "-nostdlib" ] lib_dirs = [ android_libcpp_lib_dir ] # The libc++ runtime library (must come first). # ASan needs to dynamically link to libc++ even in static builds so # that it can interpose operator new. if (is_component_build || is_asan) { libs = [ "c++_shared" ] } else { libs = [ "c++_static" ] } # Manually link the libgcc.a that the cross compiler uses. This is # absolute because the linker will look inside the sysroot if it's not. libs += [ rebase_path(android_libgcc_file), "c", ] # Clang with libc++ does not require an explicit atomic library reference. if (!is_clang) { libs += [ "atomic" ] } if (is_clang) { # Work around incompatibilities between bionic and clang headers. defines += [ "__compiler_offsetof=__builtin_offsetof", "nan=__builtin_nan", ] } # TODO(jdduke) Re-enable on mips after resolving linking # issues with libc++ (crbug.com/456380). if (current_cpu != "mipsel" && current_cpu != "mips64el") { ldflags += [ "-Wl,--warn-shared-textrel" ] } } config("executable_config") { cflags = [ "-fPIE" ] asmflags = [ "-fPIE" ] ldflags = [ "-pie" ] if (!use_gold) { # ld needs help finding libraries when linking. _rebased_sysroot = rebase_path(sysroot, root_build_dir) ldflags += [ "-Wl,-rpath-link=.:$_rebased_sysroot/usr/lib" ] } } config("hide_native_jni_exports") { ldflags = [ "-Wl,--version-script=" + rebase_path("//build/android/android_no_jni_exports.lst") ] } # Instrumentation ------------------------------------------------------------- # # The BUILDCONFIG file sets the "default_cygprofile_instrumentation" config on # targets by default. You can override whether the cygprofile instrumentation is # used on a per-target basis: # # configs -= [ "//build/config/android:default_cygprofile_instrumentation" ] # configs += [ "//build/config/android:no_cygprofile_instrumentation" ] config("default_cygprofile_instrumentation") { if (use_order_profiling) { configs = [ ":cygprofile_instrumentation" ] } else { configs = [ ":no_cygprofile_instrumentation" ] } } config("cygprofile_instrumentation") { defines = [ "CYGPROFILE_INSTRUMENTATION=1" ] cflags = [ "-finstrument-functions" ] if (!is_clang) { cflags += [ # Allow mmx intrinsics to inline, so that the compiler can expand the intrinsics. "-finstrument-functions-exclude-file-list=mmintrin.h", # Avoid errors with current NDK: # "third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/include/arm_neon.h:3426:3: error: argument must be a constant" "-finstrument-functions-exclude-file-list=arm_neon.h", ] } } config("no_cygprofile_instrumentation") { }