| // 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" |
| "\n" |
| " set_default_toolchain(toolchain_label)\n" |
| "\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" |
| "\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" |
| "\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" |
| "\n" |
| "Argument:\n" |
| "\n" |
| " toolchain_label\n" |
| " Toolchain name.\n" |
| "\n" |
| "Example:\n" |
| "\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 " |
| "file."); |
| 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 |