486 lines
17 KiB
Text
486 lines
17 KiB
Text
# Copyright (c) 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import("//build/config/nacl/config.gni")
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import("//build/config/sanitizers/sanitizers.gni")
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import("//build/toolchain/cc_wrapper.gni")
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import("//build/toolchain/goma.gni")
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import("//build/toolchain/toolchain.gni")
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# "concurrent_links" is a toolchain variable. By computing it here rather than
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# inside the toolchain, the exec_script will only get run once rather than
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# each time the toolchain template is invoked.
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if (allow_posix_link_time_opt || is_cfi) {
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concurrent_links_ =
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exec_script("get_concurrent_links.py", [ "--lto" ], "value")
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} else {
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concurrent_links_ = exec_script("get_concurrent_links.py", [], "value")
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}
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# This template defines a toolchain for something that works like gcc
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# (including clang).
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#
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# It requires the following variables specifying the executables to run:
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# - cc
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# - cxx
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# - ar
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# - ld
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# and the following which is used in the toolchain_args
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# - toolchain_cpu (What "current_cpu" should be set to when invoking a
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# build using this toolchain.)
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# - toolchain_os (What "current_os" should be set to when invoking a
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# build using this toolchain.)
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#
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# Optional parameters that control the tools:
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#
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# - libs_section_prefix
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# - libs_section_postfix
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# The contents of these strings, if specified, will be placed around
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# the libs section of the linker line. It allows one to inject libraries
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# at the beginning and end for all targets in a toolchain.
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# - solink_libs_section_prefix
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# - solink_libs_section_postfix
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# Same as libs_section_{pre,post}fix except used for solink instead of link.
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# - link_outputs
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# The content of this array, if specified, will be added to the list of
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# outputs from the link command. This can be useful in conjunction with
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# the post_link parameter.
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# - post_link
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# The content of this string, if specified, will be run as a separate
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# command following the the link command.
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# - deps
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# Just forwarded to the toolchain definition.
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# - executable_extension
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# If this string is specified it will be used for the file extension
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# for an executable, rather than using no extension; targets will
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# still be able to override the extension using the output_extension
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# variable.
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# - rebuild_define
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# The contents of this string, if specified, will be passed as a #define
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# to the toolchain. It can be used to force recompiles whenever a
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# toolchain is updated.
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# - shlib_extension
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# If this string is specified it will be used for the file extension
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# for a shared library, rather than default value specified in
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# toolchain.gni
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# - strip
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# Location of the strip executable. When specified, strip will be run on
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# all shared libraries and executables as they are built. The pre-stripped
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# artifacts will be put in lib.unstripped/ and exe.unstripped/.
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#
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# Optional build argument contols.
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#
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# - clear_sanitizers
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# When set to true, is_asan, is_msan, etc.will all be set to false. Often
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# secondary toolchains do not want to run with sanitizers.
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# - is_clang
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# Whether to use clang instead of gcc.
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# - is_component_build
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# Whether to forcibly enable or disable component builds for this
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# toolchain; if not specified, the toolchain will inherit the
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# default setting.
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# - is_nacl_glibc
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# Whether NaCl code is built using Glibc instead of Newlib.
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# - cc_wrapper
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# Override the global cc_wrapper setting. e.g. "ccache" or "icecc".
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# useful to opt-out of cc_wrapper in a particular toolchain by setting
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# cc_wrapper = "" in it.
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# - use_goma
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# Override the global use_goma setting, useful to opt-out of goma in a
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# particular toolchain by setting use_gome = false in it.
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# - use_gold
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# Override the global use_gold setting, useful if the particular
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# toolchain has a custom link step that is not actually using Gold.
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template("gcc_toolchain") {
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toolchain(target_name) {
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assert(defined(invoker.cc), "gcc_toolchain() must specify a \"cc\" value")
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assert(defined(invoker.cxx), "gcc_toolchain() must specify a \"cxx\" value")
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assert(defined(invoker.ar), "gcc_toolchain() must specify a \"ar\" value")
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assert(defined(invoker.ld), "gcc_toolchain() must specify a \"ld\" value")
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assert(defined(invoker.toolchain_cpu),
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"gcc_toolchain() must specify a \"toolchain_cpu\"")
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assert(defined(invoker.toolchain_os),
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"gcc_toolchain() must specify a \"toolchain_os\"")
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concurrent_links = concurrent_links_
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if (defined(invoker.cc_wrapper)) {
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cc_wrapper = invoker.cc_wrapper
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}
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if (defined(invoker.use_goma)) {
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use_goma = invoker.use_goma
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}
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if (use_goma) {
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assert(cc_wrapper == "", "Goma and cc_wrapper can't be used together.")
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compiler_prefix = "$goma_dir/gomacc "
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} else if (cc_wrapper != "") {
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compiler_prefix = cc_wrapper + " "
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} else {
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compiler_prefix = ""
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}
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# This define changes when the toolchain changes, forcing a rebuild.
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# Nothing should ever use this define.
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if (defined(invoker.rebuild_define)) {
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rebuild_string = "-D" + invoker.rebuild_define + " "
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} else {
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rebuild_string = ""
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}
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cc = compiler_prefix + invoker.cc
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cxx = compiler_prefix + invoker.cxx
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ar = invoker.ar
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ld = invoker.ld
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if (defined(invoker.readelf)) {
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readelf = invoker.readelf
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} else {
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readelf = "readelf"
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}
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if (defined(invoker.nm)) {
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nm = invoker.nm
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} else {
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nm = "nm"
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}
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if (defined(invoker.shlib_extension)) {
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default_shlib_extension = invoker.shlib_extension
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} else {
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default_shlib_extension = shlib_extension
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}
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if (defined(invoker.executable_extension)) {
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default_executable_extension = invoker.executable_extension
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} else {
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default_executable_extension = ""
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}
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# Bring these into our scope for string interpolation with default values.
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if (defined(invoker.libs_section_prefix)) {
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libs_section_prefix = invoker.libs_section_prefix
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} else {
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libs_section_prefix = ""
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}
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if (defined(invoker.libs_section_postfix)) {
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libs_section_postfix = invoker.libs_section_postfix
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} else {
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libs_section_postfix = ""
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}
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if (defined(invoker.solink_libs_section_prefix)) {
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solink_libs_section_prefix = invoker.solink_libs_section_prefix
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} else {
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solink_libs_section_prefix = ""
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}
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if (defined(invoker.solink_libs_section_postfix)) {
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solink_libs_section_postfix = invoker.solink_libs_section_postfix
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} else {
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solink_libs_section_postfix = ""
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}
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# These library switches can apply to all tools below.
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lib_switch = "-l"
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lib_dir_switch = "-L"
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# Object files go in this directory.
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object_subdir = "{{target_out_dir}}/{{label_name}}"
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tool("cc") {
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depfile = "{{output}}.d"
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command = "$cc -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "CC {{output}}"
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outputs = [
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"$object_subdir/{{source_name_part}}.o",
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]
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}
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tool("cxx") {
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depfile = "{{output}}.d"
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command = "$cxx -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "CXX {{output}}"
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outputs = [
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"$object_subdir/{{source_name_part}}.o",
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]
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}
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tool("asm") {
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# For GCC we can just use the C compiler to compile assembly.
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depfile = "{{output}}.d"
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command = "$cc -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "ASM {{output}}"
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outputs = [
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"$object_subdir/{{source_name_part}}.o",
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]
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}
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tool("alink") {
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rspfile = "{{output}}.rsp"
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# This needs a Python script to avoid using simple sh features in this
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# command, in case the host does not use a POSIX shell (e.g. compiling
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# POSIX-like toolchains such as NaCl on Windows).
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ar_wrapper =
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rebase_path("//build/toolchain/gcc_ar_wrapper.py", root_build_dir)
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command = "$python_path \"$ar_wrapper\" --output={{output}} --ar=\"$ar\" {{arflags}} rcsD @\"$rspfile\""
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description = "AR {{output}}"
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rspfile_content = "{{inputs}}"
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outputs = [
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"{{output_dir}}/{{target_output_name}}{{output_extension}}",
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]
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# Shared libraries go in the target out directory by default so we can
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# generate different targets with the same name and not have them collide.
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default_output_dir = "{{target_out_dir}}"
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default_output_extension = ".a"
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output_prefix = "lib"
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}
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tool("solink") {
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soname = "{{target_output_name}}{{output_extension}}" # e.g. "libfoo.so".
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sofile = "{{output_dir}}/$soname" # Possibly including toolchain dir.
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rspfile = sofile + ".rsp"
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if (defined(invoker.strip)) {
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unstripped_sofile = "{{root_out_dir}}/lib.unstripped/$soname"
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} else {
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unstripped_sofile = sofile
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}
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# These variables are not built into GN but are helpers that
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# implement (1) linking to produce a .so, (2) extracting the symbols
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# from that file (3) if the extracted list differs from the existing
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# .TOC file, overwrite it, otherwise, don't change it.
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tocfile = sofile + ".TOC"
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link_command = "$ld -shared {{ldflags}} -o \"$unstripped_sofile\" -Wl,-soname=\"$soname\" @\"$rspfile\""
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assert(defined(readelf), "to solink you must have a readelf")
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assert(defined(nm), "to solink you must have an nm")
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strip_switch = ""
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if (defined(invoker.strip)) {
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strip_switch = "--strip=${invoker.strip}"
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}
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# This needs a Python script to avoid using a complex shell command
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# requiring sh control structures, pipelines, and POSIX utilities.
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# The host might not have a POSIX shell and utilities (e.g. Windows).
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solink_wrapper = rebase_path("//build/toolchain/gcc_solink_wrapper.py")
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command = "$python_path \"$solink_wrapper\" --readelf=\"$readelf\" --nm=\"$nm\" $strip_switch --sofile=\"$unstripped_sofile\" --tocfile=\"$tocfile\" --output=\"$sofile\" -- $link_command"
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rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive $solink_libs_section_prefix {{libs}} $solink_libs_section_postfix"
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description = "SOLINK $sofile"
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# Use this for {{output_extension}} expansions unless a target manually
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# overrides it (in which case {{output_extension}} will be what the target
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# specifies).
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default_output_extension = default_shlib_extension
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default_output_dir = "{{root_out_dir}}"
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if (shlib_subdir != ".") {
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default_output_dir += "/$shlib_subdir"
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}
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output_prefix = "lib"
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# Since the above commands only updates the .TOC file when it changes, ask
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# Ninja to check if the timestamp actually changed to know if downstream
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# dependencies should be recompiled.
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restat = true
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# Tell GN about the output files. It will link to the sofile but use the
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# tocfile for dependency management.
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outputs = [
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sofile,
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tocfile,
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]
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if (sofile != unstripped_sofile) {
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outputs += [ unstripped_sofile ]
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}
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link_output = sofile
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depend_output = tocfile
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}
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tool("solink_module") {
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soname = "{{target_output_name}}{{output_extension}}" # e.g. "libfoo.so".
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sofile = "{{output_dir}}/$soname"
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rspfile = sofile + ".rsp"
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if (defined(invoker.strip)) {
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unstripped_sofile = "{{root_out_dir}}/lib.unstripped/$soname"
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} else {
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unstripped_sofile = sofile
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}
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command = "$ld -shared {{ldflags}} -o \"$unstripped_sofile\" -Wl,-soname=\"$soname\" @\"$rspfile\""
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if (defined(invoker.strip)) {
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strip_command = "${invoker.strip} --strip-unneeded -o \"$sofile\" \"$unstripped_sofile\""
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command += " && " + strip_command
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}
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rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive $solink_libs_section_prefix {{libs}} $solink_libs_section_postfix"
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description = "SOLINK_MODULE $sofile"
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# Use this for {{output_extension}} expansions unless a target manually
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# overrides it (in which case {{output_extension}} will be what the target
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# specifies).
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if (defined(invoker.loadable_module_extension)) {
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default_output_extension = invoker.loadable_module_extension
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} else {
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default_output_extension = default_shlib_extension
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}
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default_output_dir = "{{root_out_dir}}"
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if (shlib_subdir != ".") {
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default_output_dir += "/$shlib_subdir"
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}
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output_prefix = "lib"
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outputs = [
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sofile,
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]
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if (sofile != unstripped_sofile) {
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outputs += [ unstripped_sofile ]
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}
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}
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tool("link") {
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exename = "{{target_output_name}}{{output_extension}}"
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outfile = "{{output_dir}}/$exename"
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rspfile = "$outfile.rsp"
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unstripped_outfile = outfile
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# Use this for {{output_extension}} expansions unless a target manually
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# overrides it (in which case {{output_extension}} will be what the target
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# specifies).
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default_output_extension = default_executable_extension
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default_output_dir = "{{root_out_dir}}"
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if (defined(invoker.strip)) {
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unstripped_outfile = "{{root_out_dir}}/exe.unstripped/$exename"
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}
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command = "$ld {{ldflags}} -o \"$unstripped_outfile\" -Wl,--start-group @\"$rspfile\" {{solibs}} -Wl,--end-group $libs_section_prefix {{libs}} $libs_section_postfix"
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if (defined(invoker.strip)) {
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link_wrapper =
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rebase_path("//build/toolchain/gcc_link_wrapper.py", root_build_dir)
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command = "$python_path \"$link_wrapper\" --strip=\"${invoker.strip}\" --unstripped-file=\"$unstripped_outfile\" --output=\"$outfile\" -- $command"
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}
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description = "LINK $outfile"
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rspfile_content = "{{inputs}}"
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outputs = [
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outfile,
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]
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if (outfile != unstripped_outfile) {
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outputs += [ unstripped_outfile ]
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}
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if (defined(invoker.link_outputs)) {
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outputs += invoker.link_outputs
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}
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}
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# These two are really entirely generic, but have to be repeated in
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# each toolchain because GN doesn't allow a template to be used here.
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# See //build/toolchain/toolchain.gni for details.
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tool("stamp") {
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command = stamp_command
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description = stamp_description
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}
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tool("copy") {
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command = copy_command
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description = copy_description
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}
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# When invoking this toolchain not as the default one, these args will be
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# passed to the build. They are ignored when this is the default toolchain.
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toolchain_args() {
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current_cpu = invoker.toolchain_cpu
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current_os = invoker.toolchain_os
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# These values need to be passed through unchanged.
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host_toolchain = host_toolchain
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target_os = target_os
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target_cpu = target_cpu
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if (defined(invoker.is_clang)) {
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is_clang = invoker.is_clang
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}
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if (defined(invoker.is_component_build)) {
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is_component_build = invoker.is_component_build
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}
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if (defined(invoker.is_nacl_glibc)) {
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is_nacl_glibc = invoker.is_nacl_glibc
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}
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if (defined(invoker.symbol_level)) {
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symbol_level = invoker.symbol_level
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}
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if (defined(invoker.use_allocator)) {
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use_allocator = invoker.use_allocator
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}
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if (defined(invoker.use_gold)) {
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use_gold = invoker.use_gold
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}
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if (defined(invoker.clear_sanitizers) && invoker.clear_sanitizers) {
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is_asan = false
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is_cfi = false
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is_lsan = false
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is_msan = false
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is_syzyasan = false
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is_tsan = false
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is_ubsan = false
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is_ubsan_vptr = false
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}
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}
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forward_variables_from(invoker, [ "deps" ])
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}
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}
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# This is a shorthand for gcc_toolchain instances based on the
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# Chromium-built version of Clang. Only the toolchain_cpu and
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# toolchain_os variables need to be specified by the invoker, and
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# optionally toolprefix if it's a cross-compile case. Note that for
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# a cross-compile case this toolchain requires a config to pass the
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# appropriate -target option, or else it will actually just be doing
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# a native compile. The invoker can optionally override use_gold too.
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template("clang_toolchain") {
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assert(defined(invoker.toolchain_cpu),
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"clang_toolchain() must specify a \"toolchain_cpu\"")
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assert(defined(invoker.toolchain_os),
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"clang_toolchain() must specify a \"toolchain_os\"")
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if (defined(invoker.toolprefix)) {
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toolprefix = invoker.toolprefix
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} else {
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toolprefix = ""
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}
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gcc_toolchain(target_name) {
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prefix = rebase_path("//third_party/llvm-build/Release+Asserts/bin",
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root_build_dir)
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cc = "$prefix/clang"
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cxx = "$prefix/clang++"
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ld = cxx
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is_clang = true
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|
|
|
readelf = "${toolprefix}readelf"
|
|
ar = "${toolprefix}ar"
|
|
nm = "${toolprefix}nm"
|
|
|
|
forward_variables_from(invoker,
|
|
[
|
|
"toolchain_cpu",
|
|
"toolchain_os",
|
|
"use_gold",
|
|
"strip",
|
|
])
|
|
}
|
|
}
|