toolchain("mac") {
  object_subdir = "{{target_out_dir}}/{{label_name}}"

  cc = "gcc"
  cxx = "g++"
  ar = "ar"
  ld = cxx

  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_subdir/{{source_name_part}}.o"
    ]
  }

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

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

  tool("link") {
    outputs = [
      "{{root_out_dir}}/{{target_output_name}}{{output_extension}}",
    ]
    command = "$ld {{ldflags}} -o {{output}} {{inputs}} {{solibs}} {{libs}}"
    description = "LINK {{output}}"
  }

  tool("solink") {
    dylib = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"
    rspfile = dylib + ".rsp"
    tocname = dylib + ".TOC"
    temporary_tocname = dylib + ".tmp"

    does_reexport_command = "[ ! -e \"$dylib\" -o ! -e \"$tocname\" ] || otool -l \"$dylib\" | grep -q LC_REEXPORT_DYLIB"
    link_command = "$ld -shared -Wl,-install_name,@rpath/\"{{target_output_name}}{{output_extension}}\""
    link_command += " {{ldflags}} -o \"$dylib\" -Wl,-filelist,\"$rspfile\" {{libs}} {{solibs}}"

    replace_command = "if ! cmp -s \"$temporary_tocname\" \"$tocname\"; then mv \"$temporary_tocname\" \"$tocname\""
    extract_toc_command = "{ otool -l \"$dylib\" | grep LC_ID_DYLIB -A 5; nm -gP \"$dylib\" | cut -f1-2 -d' ' | grep -v U\$\$; true; }"

    command = "if $does_reexport_command ; then $link_command && $extract_toc_command > \"$tocname\"; else $link_command && $extract_toc_command > \"$temporary_tocname\" && $replace_command ; fi; fi"

    rspfile_content = "{{inputs_newline}}"

    description = "LINK {{output}}"

    default_output_dir = "{{root_out_dir}}"
    default_output_extension = ".dylib"
    output_prefix = "lib"

    restat = true
    outputs = [
      dylib,
      tocname,
    ]
    link_output = dylib
    depend_output = tocname
  }
}