build/toolchain/linux/BUILD.gn

# Copyright 2018 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.

template("gcc_toolchain") {
  toolchain(target_name) {
    assert(defined(invoker.ar), "Caller must define ar command.")
    assert(defined(invoker.cc), "Caller must define cc command.")
    assert(defined(invoker.cxx), "Caller must define cxx command.")
    assert(defined(invoker.ld), "Caller must define ld command.")
    forward_variables_from(invoker,
                           [
                             "ar",
                             "cc",
                             "cxx",
                             "ld",
                           ])

    toolchain_args = {
      forward_variables_from(invoker.toolchain_args, "*")

      # The host toolchain needs to be preserved by all secondary toolchains.
      # For futher explanation, see
      # https://gn.googlesource.com/gn/+/refs/heads/master/docs/reference.md#toolchain-overview
      host_toolchain = host_toolchain
    }

    lib_switch = "-l"
    lib_dir_switch = "-L"

    object_prefix = "{{source_out_dir}}/{{label_name}}."

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

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

    tool("asm") {
      depfile = "{{output}}.d"
      command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
      depsformat = "gcc"
      description = "ASM {{output}}"
      outputs = [
        "$object_prefix{{source_name_part}}.o",
      ]
    }

    tool("alink") {
      rspfile = "{{output}}.rsp"
      command = "rm -f {{output}} && $ar rcs {{output}} @$rspfile"
      description = "AR {{target_output_name}}{{output_extension}}"
      rspfile_content = "{{inputs}}"
      outputs = [
        "{{output_dir}}/{{target_output_name}}{{output_extension}}",
      ]
      default_output_dir = "{{target_out_dir}}"
      default_output_extension = ".a"
      output_prefix = "lib"
    }

    tool("solink") {
      soname = "{{target_output_name}}{{output_extension}}"  # e.g. "libfoo.so".
      sofile = "{{output_dir}}/$soname"
      rspfile = soname + ".rsp"

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

      description = "SOLINK {{output}}"

      # Use this for {{output_extension}} expansions unless a target manually
      # overrides it (in which case {{output_extension}} will be what the target
      # specifies).
      default_output_extension = ".so"

      # Use this for {{output_dir}} expansions unless a target manually overrides
      # it (in which case {{output_dir}} will be what the target specifies).
      default_output_dir = "{{root_out_dir}}"

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

    tool("link") {
      outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
      rspfile = "$outfile.rsp"

      # These extra ldflags allow an executable to search for shared libraries in
      # the current working directory.
      additional_executable_ldflags = "-Wl,-rpath=\$ORIGIN/ -Wl,-rpath-link="
      command = "$ld {{ldflags}} $additional_executable_ldflags -o $outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group {{libs}}"
      description = "LINK $outfile"
      default_output_dir = "{{root_out_dir}}"
      rspfile_content = "{{inputs}}"
      outputs = [
        outfile,
      ]
    }

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

    tool("copy") {
      command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
      description = "COPY {{source}} {{output}}"
    }
  }
}

template("clang_toolchain") {
  prefix = rebase_path("$clang_base_path/bin", root_build_dir)

  gcc_toolchain(target_name) {
    ar = "$prefix/llvm-ar"
    cc = "$prefix/clang"
    cxx = "$prefix/clang++"
    ld = cxx
    toolchain_args = {
      forward_variables_from(invoker.toolchain_args, "*")
      is_clang = true
    }
  }
}

clang_toolchain("clang_x64") {
  toolchain_args = {
    current_cpu = "x64"
    current_os = "linux"
  }
}

clang_toolchain("clang_x86") {
  toolchain_args = {
    current_cpu = "x86"
    current_os = "linux"
  }
}

clang_toolchain("clang_arm") {
  toolchain_args = {
    current_cpu = "arm"
    current_os = "linux"
  }
}

clang_toolchain("clang_arm64") {
  toolchain_args = {
    current_cpu = "arm64"
    current_os = "linux"
  }
}

gcc_toolchain("gcc_x64") {
  ar = "ar"
  cc = "gcc"
  cxx = "g++"
  ld = cxx
  toolchain_args = {
    current_cpu = "x64"
    current_os = "linux"
    is_gcc = true
  }
}

gcc_toolchain("gcc_x86") {
  ar = "ar"
  cc = "gcc"
  cxx = "g++"
  ld = cxx
  toolchain_args = {
    current_cpu = "x86"
    current_os = "linux"
    is_gcc = true
  }
}

gcc_toolchain("gcc_arm") {
  ar = "ar"
  cc = "gcc"
  cxx = "g++"
  ld = cxx
  toolchain_args = {
    current_cpu = "arm"
    current_os = "linux"
    is_gcc = true
  }
}

gcc_toolchain("gcc_arm64") {
  ar = "ar"
  cc = "gcc"
  cxx = "g++"
  ld = cxx
  toolchain_args = {
    current_cpu = "arm64"
    current_os = "linux"
    is_gcc = true
  }
}