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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "tools/gn/build_settings.h" |
| 6 #include "tools/gn/functions.h" |
| 7 #include "tools/gn/parse_tree.h" |
| 8 #include "tools/gn/scope.h" |
| 9 #include "tools/gn/settings.h" |
| 10 #include "tools/gn/toolchain_manager.h" |
| 11 |
| 12 /* |
| 13 set_default_toolchain: Sets the default toolchain name. |
| 14 |
| 15 set_default_toolchain(toolchain_label) |
| 16 |
| 17 The given label should identify a toolchain definition (see "toolchain"). |
| 18 This toolchain will be used for all targets unless otherwise specified. |
| 19 |
| 20 This function is only valid to call during the processing of the build |
| 21 configuration file. Since the build configuration file is processed |
| 22 separately for each toolchain, this function will be a no-op when called |
| 23 under any non-default toolchains. |
| 24 |
| 25 For example, the default toolchain should be appropriate for the current |
| 26 environment. If the current environment is 32-bit and somebody references |
| 27 a target with a 64-bit toolchain, we wouldn't want processing of the build |
| 28 config file for the 64-bit toolchain to reset the default toolchain to |
| 29 64-bit, we want to keep it 32-bits. |
| 30 |
| 31 Argument: |
| 32 |
| 33 toolchain_label: |
| 34 Toolchain name. |
| 35 |
| 36 Example: |
| 37 |
| 38 set_default_toolchain("//build/config/win:vs32") |
| 39 */ |
| 40 |
| 41 Value ExecuteSetDefaultToolchain(Scope* scope, |
| 42 const FunctionCallNode* function, |
| 43 const std::vector<Value>& args, |
| 44 Err* err) { |
| 45 if (!scope->IsProcessingBuildConfig()) { |
| 46 *err = Err(function->function(), "Must be called from build config.", |
| 47 "set_default_toolchain can only be called from the build configuration " |
| 48 "file."); |
| 49 return Value(); |
| 50 } |
| 51 |
| 52 // Ignore non-default-build-config invocations. |
| 53 if (!scope->IsProcessingDefaultBuildConfig()) |
| 54 return Value(); |
| 55 |
| 56 const SourceDir& current_dir = SourceDirForFunctionCall(function); |
| 57 const Label& default_toolchain = ToolchainLabelForScope(scope); |
| 58 |
| 59 if (!EnsureSingleStringArg(function, args, err)) |
| 60 return Value(); |
| 61 Label toolchain_label( |
| 62 Label::Resolve(current_dir, default_toolchain, args[0], err)); |
| 63 if (toolchain_label.is_null()) |
| 64 return Value(); |
| 65 |
| 66 ToolchainManager& mgr = |
| 67 scope->settings()->build_settings()->toolchain_manager(); |
| 68 mgr.SetDefaultToolchainUnlocked(toolchain_label, function->GetRange(), err); |
| 69 return Value(); |
| 70 } |
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