src/tint/BUILD.gn

# Copyright 2021 The Tint Authors
#
# 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.

# GEN_BUILD:DO_NOT_GENERATE - Don't regenerate this file with `./tools run gen`

import("//build_overrides/build.gni")

import("../../scripts/dawn_overrides_with_defaults.gni")
import("../../scripts/tint_overrides_with_defaults.gni")

if (tint_build_unittests) {
  import("//testing/test.gni")
}

import("tint.gni")

###############################################################################
# Common - Configs, etc. shared across targets
###############################################################################

config("tint_common_config") {
  include_dirs = [
    "${target_gen_dir}",
    "${tint_root_dir}/",
    "${tint_spirv_headers_dir}/include",
    "${tint_spirv_tools_dir}/",
    "${tint_spirv_tools_dir}/include",
  ]
}

config("tint_public_config") {
  defines = []
  if (tint_build_spv_reader) {
    defines += [ "TINT_BUILD_SPV_READER=1" ]
  } else {
    defines += [ "TINT_BUILD_SPV_READER=0" ]
  }

  if (tint_build_spv_writer) {
    defines += [ "TINT_BUILD_SPV_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_SPV_WRITER=0" ]
  }

  if (tint_build_wgsl_reader) {
    defines += [ "TINT_BUILD_WGSL_READER=1" ]
  } else {
    defines += [ "TINT_BUILD_WGSL_READER=0" ]
  }

  if (tint_build_wgsl_writer) {
    defines += [ "TINT_BUILD_WGSL_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_WGSL_WRITER=0" ]
  }

  if (tint_build_msl_writer) {
    defines += [ "TINT_BUILD_MSL_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_MSL_WRITER=0" ]
  }

  if (tint_build_hlsl_writer) {
    defines += [ "TINT_BUILD_HLSL_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_HLSL_WRITER=0" ]
  }

  if (tint_build_glsl_writer) {
    defines += [ "TINT_BUILD_GLSL_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_GLSL_WRITER=0" ]
  }

  if (tint_build_syntax_tree_writer) {
    defines += [ "TINT_BUILD_SYNTAX_TREE_WRITER=1" ]
  } else {
    defines += [ "TINT_BUILD_SYNTAX_TREE_WRITER=0" ]
  }

  include_dirs = [
    "${tint_root_dir}/",
    "${tint_root_dir}/include/",
    "${tint_spirv_headers_dir}/include",
  ]
}

config("tint_config") {
  include_dirs = []
  if (tint_build_spv_reader || tint_build_spv_writer) {
    include_dirs += [ "${tint_spirv_tools_dir}/include/" ]
  }
}

source_set("thread") {
  # GN doesn't appear to need to depend on any thread libraries.
}

source_set("metal") {
  frameworks = [
    "CoreGraphics.framework",
    "Foundation.framework",
    "Metal.framework",
  ]
}

config("tint_unittests_config") {
  include_dirs = [
    "${tint_googletest_dir}/googlemock/include",
    "${tint_googletest_dir}/googletest/include",
  ]

  configs = [
    ":tint_common_config",
    ":tint_public_config",
  ]

  if (is_win && is_debug) {
    # TODO(crbug.com/tint/1749): both msvc and clang builds stack overflow on debug builds.
    # Increase the initial stack size to 4 MB (default is 1MB).
    ldflags = [ "/STACK:4194304" ]
  }
}

if (tint_build_unittests) {
  ###############################################################################
  # Gtest Gmock - Handle building inside and outside of Chromium.
  ###############################################################################
  # When building outside of Chromium we need to define our own targets for GTest
  # and GMock. However when compiling inside of Chromium we need to reuse the
  # existing targets, both because Chromium has a special harness for swarming
  # and because otherwise the "gn check" fails.

  if (build_with_chromium) {
    # When we are in Chromium we reuse its targets, and also add some deps that
    # are needed to launch the test in swarming mode.
    group("gmock_and_gtest") {
      testonly = true
      public_deps = [
        "//base",
        "//base/test:test_support",
        "//testing/gmock",
        "//testing/gtest",
        "//third_party/googletest:gmock",
      ]
    }
  } else {
    # When we aren't in Chromium we define out own targets based on the location
    # of the googletest repo.
    config("gtest_config") {
      include_dirs = [
        "${tint_googletest_dir}/googletest",
        "${tint_googletest_dir}/googletest/include",
      ]
    }
    static_library("gtest") {
      testonly = true
      sources = [ "${tint_googletest_dir}/googletest/src/gtest-all.cc" ]
      public_configs = [ ":gtest_config" ]
    }

    config("gmock_config") {
      include_dirs = [
        "${tint_googletest_dir}/googlemock",
        "${tint_googletest_dir}/googlemock/include",
        "${tint_googletest_dir}/googletest/include",
      ]
    }

    static_library("gmock") {
      testonly = true
      sources = [ "${tint_googletest_dir}/googlemock/src/gmock-all.cc" ]
      public_configs = [ ":gmock_config" ]
    }

    group("gmock_and_gtest") {
      testonly = true
      public_deps = [
        ":gmock",
        ":gtest",
      ]
    }
  }
}

group("abseil") {
  # When build_with_chromium=true we need to include "//third_party/abseil-cpp:absl" while
  # it's beneficial to be more specific with standalone Dawn, especially when it comes to
  # including it as a dependency in other projects (such as Skia).
  if (build_with_chromium) {
    public_deps = [ "$dawn_abseil_dir:absl" ]
  } else {
    public_deps = [ "${dawn_root}/third_party/gn/abseil-cpp:strings" ]
  }
}

source_set("winsock") {
  libs = [ "ws2_32.lib" ]
}

###############################################################################
# Aliases.
###############################################################################
if (tint_build_unittests) {
  group("tint_unittests") {
    testonly = true
    public_deps = [ "${tint_src_dir}/cmd/test" ]
  }
}