76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "tools/gn/build_settings.h"
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#include "tools/gn/functions.h"
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#include "tools/gn/parse_tree.h"
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#include "tools/gn/scope.h"
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#include "tools/gn/settings.h"
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#include "tools/gn/toolchain_manager.h"
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namespace functions {
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const char kSetDefaultToolchain[] = "set_default_toolchain";
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const char kSetDefaultToolchain_Help[] =
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"set_default_toolchain: Sets the default toolchain name.\n"
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"\n"
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" set_default_toolchain(toolchain_label)\n"
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"\n"
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" The given label should identify a toolchain definition (see\n"
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" \"help toolchain\"). This toolchain will be used for all targets\n"
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" unless otherwise specified.\n"
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"\n"
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" This function is only valid to call during the processing of the build\n"
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" configuration file. Since the build configuration file is processed\n"
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" separately for each toolchain, this function will be a no-op when\n"
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" called under any non-default toolchains.\n"
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"\n"
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" For example, the default toolchain should be appropriate for the\n"
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" current environment. If the current environment is 32-bit and \n"
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" somebody references a target with a 64-bit toolchain, we wouldn't\n"
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" want processing of the build config file for the 64-bit toolchain to\n"
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" reset the default toolchain to 64-bit, we want to keep it 32-bits.\n"
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"\n"
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"Argument:\n"
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"\n"
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" toolchain_label\n"
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" Toolchain name.\n"
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"\n"
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"Example:\n"
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"\n"
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" set_default_toolchain(\"//build/config/win:vs32\")";
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Value RunSetDefaultToolchain(Scope* scope,
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const FunctionCallNode* function,
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const std::vector<Value>& args,
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Err* err) {
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if (!scope->IsProcessingBuildConfig()) {
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*err = Err(function->function(), "Must be called from build config.",
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"set_default_toolchain can only be called from the build configuration "
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"file.");
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return Value();
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}
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// Ignore non-default-build-config invocations.
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if (!scope->IsProcessingDefaultBuildConfig())
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return Value();
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const SourceDir& current_dir = SourceDirForFunctionCall(function);
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const Label& default_toolchain = ToolchainLabelForScope(scope);
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if (!EnsureSingleStringArg(function, args, err))
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return Value();
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Label toolchain_label(
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Label::Resolve(current_dir, default_toolchain, args[0], err));
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if (toolchain_label.is_null())
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return Value();
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ToolchainManager& mgr =
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scope->settings()->build_settings()->toolchain_manager();
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mgr.SetDefaultToolchainUnlocked(toolchain_label, function->GetRange(), err);
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return Value();
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}
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} // namespace functions
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