Add clang configuration for ninja build scripts

#  limitations under the License.

#

set_default_toolchain("//build/toolchain/gcc")

set_default_toolchain("//build/toolchain/clang")

set_defaults("executable") {

  configs = [

#

#  Copyright (C) 2016 Android Open Source Project

#

#  Licensed under the Apache License, Version 2.0 (the "License");

#  you may not use this file except in compliance with the License.

#  You may obtain a copy of the License at:

#

#  http://www.apache.org/licenses/LICENSE-2.0

#

#  Unless required by applicable law or agreed to in writing, software

#  distributed under the License is distributed on an "AS IS" BASIS,

#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

#  See the License for the specific language governing permissions and

#  limitations under the License.

#

clang = "clang"

clangxx = "clang++"

toolchain("clang") {

  tool("cc") {

    depfile = "{{output}}.d"

    command = "$clang -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 = "$clangxx -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 rcs {{output}} @$rspfile"

    description = "AR {{target_output_name}}{{output_extension}}"

    rspfile_content = "{{inputs}}"

    outputs = [

      "{{target_out_dir}}/{{target_output_name}}{{output_extension}}",

    ]

    default_output_extension = ".a"

    output_prefix = "lib"

  }

  tool("solink") {

    soname = "{{target_output_name}}{{output_extension}}"  # e.g. "libfoo.so".

    rspfile = soname + ".rsp"

    command =

        "$clangxx -shared {{ldflags}} -o $soname -Wl,-soname=$soname @$rspfile"

    rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive {{libs}}"

    description = "SOLINK $soname"

    # 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"

    outputs = [

      soname,

    ]

    link_output = soname

    depend_output = soname

    output_prefix = "lib"

  }

  tool("link") {

    outfile = "{{target_output_name}}{{output_extension}}"

    rspfile = "$outfile.rsp"

    command = "$clangxx {{ldflags}} -o $outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group {{libs}}"

    description = "LINK $outfile"

    rspfile_content = "{{inputs}}"

    outputs = [

      outfile,

    ]

  }

  tool("stamp") {

    command = "touch {{output}}"

    description = "STAMP {{output}}"

  }

  tool("copy") {

    command = "cp -af {{source}} {{output}}"

    description = "COPY {{source}} {{output}}"

  }

}