config/gcc-stl-wrapper.template.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=8 et :
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef mozilla_${HEADER}_h
   9 #define mozilla_${HEADER}_h
  10
  11 // For some reason, Apple's GCC refuses to honor -fno-exceptions when
  12 // compiling ObjC.
  13 #if __EXCEPTIONS && !(__OBJC__ && __GNUC__ && XP_IOS)
  14 #  error "STL code can only be used with -fno-exceptions"
  15 #endif
  16
  17 // Silence "warning: #include_next is a GCC extension"
  18 #pragma GCC system_header
  19
  20 // mozalloc.h wants <new>; break the cycle by always explicitly
  21 // including <new> here.  NB: this is a tad sneaky.  Sez the gcc docs:
  22 //
  23 //    `#include_next' does not distinguish between <file> and "file"
  24 //    inclusion, nor does it check that the file you specify has the
  25 //    same name as the current file. It simply looks for the file
  26 //    named, starting with the directory in the search path after the
  27 //    one where the current file was found.
  28 #include_next <new>
  29
  30 // See if we're in code that can use mozalloc.  NB: this duplicates
  31 // code in nscore.h because nscore.h pulls in prtypes.h, and chromium
  32 // can't build with that being included before base/basictypes.h.
  33 #if !defined(XPCOM_GLUE) && !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
  34 #  include "mozilla/mozalloc.h"
  35 #else
  36 #  error "STL code can only be used with infallible ::operator new()"
  37 #endif
  38
  39 #if defined(DEBUG) && !defined(_GLIBCXX_DEBUG)
  40 // Enable checked iterators and other goodies
  41 //
  42 // FIXME/bug 551254: gcc's debug STL implementation requires -frtti.
  43 // Figure out how to resolve this with -fno-rtti.  Maybe build with
  44 // -frtti in DEBUG builds?
  45 //
  46 //  # define _GLIBCXX_DEBUG 1
  47 #endif
  48
  49 #pragma GCC visibility push(default)
  50 #include_next <${HEADER}>
  51 #pragma GCC visibility pop
  52
  53 // gcc calls a __throw_*() function from bits/functexcept.h when it
  54 // wants to "throw an exception".  functexcept exists nominally to
  55 // support -fno-exceptions, but since we'll always use the system
  56 // libstdc++, and it's compiled with exceptions, then in practice
  57 // these __throw_*() functions will always throw exceptions (shades of
  58 // -fshort-wchar).  We don't want that and so define our own inlined
  59 // __throw_*().
  60 #ifndef mozilla_throw_gcc_h
  61 #  include "mozilla/throw_gcc.h"
  62 #endif
  63
  64 #endif  // if mozilla_${HEADER}_h