1# Copyright (c) 2014 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# This file is meant to be included to set clang-specific compiler flags.
6# To use this the following variable can be defined:
7#   clang_warning_flags:       list: Compiler flags to pass to clang.
8#   clang_warning_flags_unset: list: Compiler flags to not pass to clang.
9#
10# Only use this in third-party code. In chromium_code, fix your code to not
11# warn instead!
12#
13# Note that the gypi file is included in target_defaults, so it does not need
14# to be explicitly included.
15#
16# Warning flags set by this will be used on all platforms. If you want to set
17# warning flags on only some platforms, you have to do so manually.
18#
19# To use this, create a gyp target with the following form:
20# {
21#   'target_name': 'my_target',
22#   'variables': {
23#     'clang_warning_flags': ['-Wno-awesome-warning'],
24#     'clang_warning_flags_unset': ['-Wpreviously-set-flag'],
25#   }
26# }
27
28{
29  'variables': {
30    'clang_warning_flags_unset%': [],  # Provide a default value.
31  },
32  'conditions': [
33    ['clang==1', {
34      # This uses >@ instead of @< to also see clang_warning_flags set in
35      # targets directly, not just the clang_warning_flags in target_defaults.
36      'cflags': [ '>@(clang_warning_flags)' ],
37      'cflags!': [ '>@(clang_warning_flags_unset)' ],
38      'xcode_settings': {
39        'WARNING_CFLAGS': ['>@(clang_warning_flags)'],
40        'WARNING_CFLAGS!': ['>@(clang_warning_flags_unset)'],
41      },
42      'msvs_settings': {
43        'VCCLCompilerTool': {
44          'AdditionalOptions': [ '>@(clang_warning_flags)' ],
45          'AdditionalOptions!': [ '>@(clang_warning_flags_unset)' ],
46        },
47      },
48    }],
49    ['clang==0 and host_clang==1', {
50      'target_conditions': [
51        ['_toolset=="host"', {
52          'cflags': [ '>@(clang_warning_flags)' ],
53          'cflags!': [ '>@(clang_warning_flags_unset)' ],
54        }],
55      ],
56    }],
57  ],
58}
59