| # Copyright 2016 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. |
| |
| import("//build/config/compiler/compiler.gni") |
| |
| template("split_static_library") { |
| assert(defined(invoker.split_count), |
| "Must define split_count for split_static_library") |
| |
| # In many conditions the number of inputs will be 1 (because the |
| # count will be conditional on platform or configuration) and for |
| # some build configurations it's unnecessary to split libraries |
| # since the tooling will never create files of a problematic size. |
| if (invoker.split_count == 1 || use_lld) { |
| static_library(target_name) { |
| forward_variables_from(invoker, "*") |
| } |
| } else { |
| group_name = target_name |
| |
| generated_static_libraries = [] |
| current_library_index = 0 |
| foreach(current_sources, split_list(invoker.sources, invoker.split_count)) { |
| current_name = "${target_name}_$current_library_index" |
| assert( |
| current_sources != [], |
| "Your values for splitting a static library generate one that has no sources.") |
| generated_static_libraries += [ ":$current_name" ] |
| |
| static_library(current_name) { |
| # Generated static library shard gets everything but sources (which |
| # we're redefining) and visibility (which is set to be the group |
| # below). |
| forward_variables_from(invoker, |
| "*", |
| [ |
| "check_includes", |
| "sources", |
| "visibility", |
| ]) |
| sources = current_sources |
| visibility = [ ":$group_name" ] |
| |
| # When splitting a target's sources up into a series of static |
| # libraries, those targets will naturally include headers from each |
| # other arbitrarily. We could theoretically generate a web of |
| # dependencies and allow_circular_includes_from between all pairs of |
| # targets, but that's very cumbersome. Typical usage in Chrome is that |
| # only official Windows builds use split static libraries due to the |
| # Visual Studio size limits, and this means we'll still get header |
| # checking coverage for the other configurations. |
| check_includes = false |
| |
| # Uniquify the output name if one is specified. |
| if (defined(invoker.output_name)) { |
| output_name = "${invoker.output_name}_$current_library_index" |
| } |
| } |
| |
| current_library_index = current_library_index + 1 |
| } |
| |
| group(group_name) { |
| public_deps = generated_static_libraries |
| forward_variables_from(invoker, |
| [ |
| "testonly", |
| "visibility", |
| ]) |
| } |
| } |
| } |
| |
| set_defaults("split_static_library") { |
| configs = default_compiler_configs |
| } |