| # Copyright (c) 2013 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. |
| |
| if (is_starboard) { |
| is_component_build = false |
| } |
| |
| # A helper for forwarding testonly and visibility. |
| # Forwarding "*" does not include variables from outer scopes (to avoid copying |
| # all globals into each template invocation), so it will not pick up |
| # file-scoped or outer-template-scoped variables. Normally this behavior is |
| # desired, but "visibility" and "testonly" are commonly defined in outer scopes. |
| # Explicitly forwarding them in forward_variables_from() works around this |
| # nuance. See //build/docs/writing_gn_templates.md#using-forward_variables_from |
| TESTONLY_AND_VISIBILITY = [ |
| "testonly", |
| "visibility", |
| ] |
| |
| # ============================================================================== |
| # COMPONENT SETUP |
| # ============================================================================== |
| |
| # Defines a component, which equates to a shared_library when |
| # is_component_build == true and a static_library otherwise. |
| # |
| # Use static libraries for the static build rather than source sets because |
| # many of of our test binaries link many large dependencies but often don't |
| # use large portions of them. The static libraries are much more efficient to |
| # link in this situation since only the necessary object files are linked. |
| # |
| # The invoker can override the type of the target in the non-component-build |
| # case by setting static_component_type to either "source_set" or |
| # "static_library". If unset, the default will be used. |
| template("component") { |
| if (is_component_build) { |
| _component_mode = "shared_library" |
| } else if (defined(invoker.static_component_type)) { |
| assert(invoker.static_component_type == "static_library" || |
| invoker.static_component_type == "source_set") |
| _component_mode = invoker.static_component_type |
| } else if (!defined(invoker.sources) || invoker.sources == []) { |
| # When there are no sources defined, use a source set to avoid creating |
| # an empty static library (which generally don't work). |
| _component_mode = "source_set" |
| } else { |
| _component_mode = "static_library" |
| } |
| target(_component_mode, target_name) { |
| forward_variables_from(invoker, TESTONLY_AND_VISIBILITY) |
| forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY) |
| } |
| } |
| |
| # Component defaults |
| set_defaults("component") { |
| if (is_component_build) { |
| configs = default_shared_library_configs |
| if (is_android) { |
| configs -= [ "//build/config/android:hide_all_but_jni_onload" ] |
| } |
| } else { |
| configs = default_compiler_configs |
| } |
| } |