blob: 1eb5ee09b818ffa26334a9cb61b56d7e0dbddecb [file] [log] [blame]
// 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.
#include "tools/gn/build_settings.h"
#include "tools/gn/functions.h"
#include "tools/gn/loader.h"
#include "tools/gn/parse_tree.h"
#include "tools/gn/scope.h"
#include "tools/gn/settings.h"
namespace functions {
const char kSetDefaultToolchain[] = "set_default_toolchain";
const char kSetDefaultToolchain_HelpShort[] =
"set_default_toolchain: Sets the default toolchain name.";
const char kSetDefaultToolchain_Help[] =
"set_default_toolchain: Sets the default toolchain name.\n"
" set_default_toolchain(toolchain_label)\n"
" The given label should identify a toolchain definition (see\n"
" \"help toolchain\"). This toolchain will be used for all targets\n"
" unless otherwise specified.\n"
" This function is only valid to call during the processing of the build\n"
" configuration file. Since the build configuration file is processed\n"
" separately for each toolchain, this function will be a no-op when\n"
" called under any non-default toolchains.\n"
" For example, the default toolchain should be appropriate for the\n"
" current environment. If the current environment is 32-bit and \n"
" somebody references a target with a 64-bit toolchain, we wouldn't\n"
" want processing of the build config file for the 64-bit toolchain to\n"
" reset the default toolchain to 64-bit, we want to keep it 32-bits.\n"
" toolchain_label\n"
" Toolchain name.\n"
" set_default_toolchain(\"//build/config/win:vs32\")";
Value RunSetDefaultToolchain(Scope* scope,
const FunctionCallNode* function,
const std::vector<Value>& args,
Err* err) {
if (!scope->IsProcessingBuildConfig()) {
*err = Err(function->function(), "Must be called from build config.",
"set_default_toolchain can only be called from the build configuration "
return Value();
// When the loader is expecting the default toolchain to be set, it will set
// this key on the scope to point to the destination.
Label* default_toolchain_dest = static_cast<Label*>(
scope->GetProperty(Loader::kDefaultToolchainKey, NULL));
if (!default_toolchain_dest)
return Value();
const SourceDir& current_dir = scope->GetSourceDir();
const Label& default_toolchain = ToolchainLabelForScope(scope);
if (!EnsureSingleStringArg(function, args, err))
return Value();
Label toolchain_label(
Label::Resolve(current_dir, default_toolchain, args[0], err));
if (toolchain_label.is_null())
return Value();
*default_toolchain_dest = toolchain_label;
return Value();
} // namespace functions