334 lines
12 KiB
Plaintext
Executable File
334 lines
12 KiB
Plaintext
Executable File
# 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/clang/clang.gni")
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import("//build/config/mac/mac_sdk.gni")
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import("//build/config/mac/symbols.gni")
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assert(host_os == "mac")
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import("//build/toolchain/cc_wrapper.gni")
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import("//build/toolchain/clang_static_analyzer.gni")
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import("//build/toolchain/toolchain.gni")
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# When implementing tools using Python scripts, a TOOL_VERSION=N env
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# variable is placed in front of the command. The N should be incremented
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# whenever the script is changed, so that the build system rebuilds all
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# edges that utilize the script. Ideally this should be changed to use
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# proper input-dirty checking, but that could be expensive. Instead, use a
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# script to get the tool scripts' modification time to use as the version.
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# This won't cause a re-generation of GN files when the tool script changes
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# but it will cause edges to be marked as dirty if the ninja files are
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# regenerated. See https://crbug.com/619083 for details. A proper fix
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# would be to have inputs to tools (https://crbug.com/621119).
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tool_versions =
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exec_script("get_tool_mtime.py",
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rebase_path([
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"//build/toolchain/mac/filter_libtool.py",
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"//build/toolchain/mac/linker_driver.py",
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],
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root_build_dir),
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"trim scope")
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# Shared toolchain definition. Invocations should set current_os to set the
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# build args in this definition.
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template("mac_toolchain") {
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toolchain(target_name) {
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if (use_system_xcode) {
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env_wrapper = ""
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} else {
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env_wrapper = "export DEVELOPER_DIR=$hermetic_xcode_path; "
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}
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# When invoking this toolchain not as the default one, these args will be
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# passed to the build. They are ignored when this is the default toolchain.
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assert(defined(invoker.toolchain_args),
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"Toolchains must declare toolchain_args")
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toolchain_args = {
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# Populate toolchain args from the invoker.
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forward_variables_from(invoker.toolchain_args, "*")
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# The host toolchain value computed by the default toolchain's setup
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# needs to be passed through unchanged to all secondary toolchains to
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# ensure that it's always the same, regardless of the values that may be
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# set on those toolchains.
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host_toolchain = host_toolchain
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}
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# Supports building with the version of clang shipped with Xcode when
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# targeting iOS by not respecting clang_base_path.
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if (toolchain_args.current_os == "ios" && use_xcode_clang) {
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prefix = ""
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} else {
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prefix = rebase_path("$clang_base_path/bin/", root_build_dir)
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}
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_cc = "${prefix}clang"
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_cxx = "${prefix}clang++"
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_ar = "${prefix}llvm-ar"
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# When the invoker has explicitly overridden use_goma or cc_wrapper in the
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# toolchain args, use those values, otherwise default to the global one.
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# This works because the only reasonable override that toolchains might
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# supply for these values are to force-disable them.
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if (defined(toolchain_args.cc_wrapper)) {
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toolchain_cc_wrapper = toolchain_args.cc_wrapper
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} else {
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toolchain_cc_wrapper = cc_wrapper
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}
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# Compute the compiler prefix.
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if (toolchain_cc_wrapper != "") {
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compiler_prefix = toolchain_cc_wrapper + " "
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} else {
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compiler_prefix = ""
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}
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cc = compiler_prefix + _cc
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cxx = compiler_prefix + _cxx
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ld = _cxx
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if (use_clang_static_analyzer) {
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analyzer_wrapper =
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rebase_path("//build/toolchain/clang_static_analyzer_wrapper.py",
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root_build_dir) + " --mode=clang"
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cc = analyzer_wrapper + " ${cc}"
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cxx = analyzer_wrapper + " ${cxx}"
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ld = cxx
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}
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linker_driver =
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"TOOL_VERSION=${tool_versions.linker_driver} " +
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rebase_path("//build/toolchain/mac/linker_driver.py", root_build_dir)
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# On iOS, the final applications are assembled using lipo (to support fat
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# builds). The correct flags are passed to the linker_driver.py script
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# directly during the lipo call.
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_save_unstripped_output = false
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# Make these 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. Use label_name instead of
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# target_output_name since labels will generally have no spaces and will be
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# unique in the directory.
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object_subdir = "{{source_out_dir}}/{{label_name}}"
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if (_save_unstripped_output) {
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_unstripped_output = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}.unstripped"
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}
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tool("cc") {
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depfile = "{{output}}.d"
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precompiled_header_type = "gcc"
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command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "CC {{output}}"
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outputs = [ "$object_subdir/{{source_name_part}}.o" ]
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}
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tool("cxx") {
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depfile = "{{output}}.d"
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precompiled_header_type = "gcc"
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command = "$cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "CXX {{output}}"
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outputs = [ "$object_subdir/{{source_name_part}}.o" ]
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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 $depfile {{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "ASM {{output}}"
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outputs = [ "$object_subdir/{{source_name_part}}.o" ]
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}
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tool("objc") {
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depfile = "{{output}}.d"
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precompiled_header_type = "gcc"
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command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{framework_dirs}} {{cflags}} {{cflags_objc}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "OBJC {{output}}"
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outputs = [ "$object_subdir/{{source_name_part}}.o" ]
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}
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tool("objcxx") {
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depfile = "{{output}}.d"
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precompiled_header_type = "gcc"
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command = "$cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{framework_dirs}} {{cflags}} {{cflags_objcc}} -c {{source}} -o {{output}}"
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depsformat = "gcc"
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description = "OBJCXX {{output}}"
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outputs = [ "$object_subdir/{{source_name_part}}.o" ]
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}
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tool("alink") {
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rspfile = "{{output}}.rsp"
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rspfile_content = "{{inputs}}"
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command = "$_ar {{arflags}} -r -c -s -D {{output}} \"@$rspfile\""
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command = "rm -f {{output}} && $command"
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description = "AR {{output}}"
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outputs = [ "{{output_dir}}/{{target_output_name}}{{output_extension}}" ]
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default_output_dir = "{{target_out_dir}}"
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default_output_extension = ".a"
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output_prefix = "lib"
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}
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tool("solink") {
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dylib = "{{output_dir}}/{{target_output_name}}{{output_extension}}" # eg
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# "./libfoo.dylib"
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rspfile = dylib + ".rsp"
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pool = "//build/toolchain:link_pool($default_toolchain)"
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# These variables are not built into GN but are helpers that implement
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# (1) linking to produce a .dylib, (2) extracting the symbols from that
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# file to a temporary file, (3) if the temporary file has differences from
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# the existing .TOC file, overwrite it, otherwise, don't change it.
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#
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# As a special case, if the library reexports symbols from other dynamic
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# libraries, we always update the .TOC and skip the temporary file and
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# diffing steps, since that library always needs to be re-linked.
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tocname = dylib + ".TOC"
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temporary_tocname = dylib + ".tmp"
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does_reexport_command = "[ ! -e \"$dylib\" -o ! -e \"$tocname\" ] || otool -l \"$dylib\" | grep -q LC_REEXPORT_DYLIB"
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link_command = "$linker_driver $ld -shared "
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if (is_component_build) {
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link_command += " -Wl,-install_name,@rpath/\"{{target_output_name}}{{output_extension}}\" "
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}
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link_command += "{{ldflags}} -o \"$dylib\" -Wl,-filelist,\"$rspfile\" {{libs}} {{solibs}} {{frameworks}}"
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replace_command = "if ! cmp -s \"$temporary_tocname\" \"$tocname\"; then mv \"$temporary_tocname\" \"$tocname\""
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extract_toc_command = "{ otool -l \"$dylib\" | grep LC_ID_DYLIB -A 5; nm -gP \"$dylib\" | cut -f1-2 -d' ' | grep -v U\$\$; true; }"
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command = "$env_wrapper if $does_reexport_command ; then $link_command && $extract_toc_command > \"$tocname\"; else $link_command && $extract_toc_command > \"$temporary_tocname\" && $replace_command ; fi; fi"
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rspfile_content = "{{inputs_newline}}"
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description = "SOLINK {{output}}"
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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_dir = "{{root_out_dir}}"
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default_output_extension = ".dylib"
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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 dylib but use the
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# tocname for dependency management.
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outputs = [
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dylib,
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tocname,
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]
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link_output = dylib
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depend_output = tocname
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if (_save_unstripped_output) {
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outputs += [ _unstripped_output ]
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}
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}
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tool("solink_module") {
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sofile = "{{output_dir}}/{{target_output_name}}{{output_extension}}" # eg
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# "./libfoo.so"
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rspfile = sofile + ".rsp"
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pool = "//build/toolchain:link_pool($default_toolchain)"
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link_command = "$env_wrapper $linker_driver $ld -bundle {{ldflags}} -o \"$sofile\" -Wl,-filelist,\"$rspfile\""
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if (is_component_build) {
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link_command += " -Wl,-install_name,@rpath/{{target_output_name}}{{output_extension}}"
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}
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link_command += " {{solibs}} {{libs}}"
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command = link_command
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rspfile_content = "{{inputs_newline}}"
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description = "SOLINK_MODULE {{output}}"
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# Use this for {{output_extension}} expansions unless a target manually
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# overrides it (in which case {{output_extension}} will be what the target
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# specifies).
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default_output_dir = "{{root_out_dir}}"
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default_output_extension = ".so"
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outputs = [ sofile ]
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if (_save_unstripped_output) {
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outputs += [ _unstripped_output ]
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}
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}
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tool("link") {
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outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
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rspfile = "$outfile.rsp"
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pool = "//build/toolchain:link_pool($default_toolchain)"
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# Note about -filelist: Apple's linker reads the file list file and
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# interprets each newline-separated chunk of text as a file name. It
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# doesn't do the things one would expect from the shell like unescaping
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# or handling quotes. In contrast, when Ninja finds a file name with
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# spaces, it single-quotes them in $inputs_newline as it would normally
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# do for command-line arguments. Thus any source names with spaces, or
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# label names with spaces (which GN bases the output paths on) will be
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# corrupted by this process. Don't use spaces for source files or labels.
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command = "$env_wrapper $linker_driver $ld {{ldflags}} -o \"$outfile\" -Wl,-filelist,\"$rspfile\" {{solibs}} {{libs}} {{frameworks}}"
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description = "LINK $outfile"
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rspfile_content = "{{inputs_newline}}"
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outputs = [ outfile ]
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if (_save_unstripped_output) {
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outputs += [ _unstripped_output ]
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}
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default_output_dir = "{{root_out_dir}}"
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}
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# These two are really entirely generic, but have to be repeated in
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# each toolchain because GN doesn't allow a template to be used here.
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# See //build/toolchain/toolchain.gni for details.
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tool("stamp") {
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command = stamp_command
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description = stamp_description
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}
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tool("copy") {
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command = copy_command
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description = copy_description
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}
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tool("action") {
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pool = "//build/toolchain:action_pool($default_toolchain)"
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}
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}
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}
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mac_toolchain("clang_x64") {
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toolchain_args = {
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current_cpu = "x64"
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current_os = "mac"
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}
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}
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mac_toolchain("clang_x86") {
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toolchain_args = {
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current_cpu = "x86"
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current_os = "mac"
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}
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}
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mac_toolchain("clang_arm64") {
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toolchain_args = {
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current_cpu = "arm64"
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current_os = "mac"
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}
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}
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