common-mk/toolchain/BUILD.gn

# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

declare_args() {
  # C++ compiler/linker to use.
  cxx = ""

  # C compiler to use.
  cc = ""

  # C/C++ archiver to use.
  ar = ""
}

assert(cxx != "", "cxx must be set")
assert(cc != "", "cc must be set")
assert(ar != "", "ar must be set")

toolchain("toolchain") {
  lib_switch = "-l"
  lib_dir_switch = "-L"

  tool("cc") {
    depfile = "{{output}}.d"
    command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
    depsformat = "gcc"
    description = "CC {{output}}"
    outputs =
        [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
  }

  tool("cxx") {
    depfile = "{{output}}.d"
    command = "$cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
    depsformat = "gcc"
    description = "CXX {{output}}"
    outputs =
        [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
  }

  tool("alink") {
    rspfile = "{{output}}.rsp"
    command = "rm -f {{output}} && $ar {{arflags}} {{output}} @$rspfile"
    description = "AR {{target_output_name}}{{output_extension}}"

    rspfile_content = "{{inputs}}"
    outputs = [ "{{root_out_dir}}/{{target_output_name}}{{output_extension}}" ]
    default_output_extension = ".a"
    output_prefix = "lib"
  }

  tool("solink") {
    soname = "{{target_output_name}}{{output_extension}}"
    sofile = "{{output_dir}}/lib/$soname"
    rspfile = "lib/" + soname + ".rsp"

    command =
        "$cxx -shared {{ldflags}} -o $sofile -Wl,-soname=$soname @$rspfile"
    rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive {{libs}}"

    description = "SOLINK $soname"

    default_output_extension = ".so"
    default_output_dir = "{{root_out_dir}}"

    outputs = [ sofile ]
    link_output = sofile
    depend_output = sofile
    output_prefix = "lib"
  }

  tool("link") {
    outfile = "{{target_output_name}}{{output_extension}}"

    command = "$cxx {{ldflags}} -o $outfile -Wl,--start-group {{inputs}} -Wl,--end-group {{solibs}} {{libs}}"
    description = "LINK $outfile"
    default_output_dir = "{{root_out_dir}}"
    outputs = [ outfile ]
  }

  tool("stamp") {
    command = "touch {{output}}"
    description = "STAMP {{output}}"
  }

  tool("copy") {
    command = "cp -af {{source}} {{output}}"
    description = "COPY {{source}} {{output}}"
  }
}