gfx/layers/BuildConstants.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef BUILD_CONSTANTS_H_
   8 #define BUILD_CONSTANTS_H_
   9
  10 /**
  11  * Why not just use ifdefs?
  12  * ifdefs tend to result in code that compiles on one platform but not another.
  13  * Given the number of build and platform configurations we have, it's best to
  14  * aim to compile the same on as many platforms as possible, and let the
  15  * compiler see the constexprs and handle dead-code elision itself.
  16  */
  17
  18 namespace mozilla {
  19
  20 constexpr bool kIsDebug =
  21 #ifdef DEBUG
  22     true;
  23 #else
  24     false;
  25 #endif
  26
  27 constexpr bool kIsWindows =
  28 #ifdef XP_WIN
  29     true;
  30 #else
  31     false;
  32 #endif
  33
  34 constexpr bool kIsMacOS =
  35 #ifdef XP_MACOSX
  36     true;
  37 #else
  38     false;
  39 #endif
  40
  41 constexpr bool kIsLinux =
  42 #ifdef MOZ_WIDGET_GTK
  43     true;
  44 #else
  45     false;
  46 #endif
  47
  48 constexpr bool kIsAndroid =
  49 #ifdef MOZ_WIDGET_ANDROID
  50     true;
  51 #else
  52     false;
  53 #endif
  54
  55 }  // namespace mozilla
  56
  57 #endif  // BUILD_CONSTANTS_H_