diff options
Diffstat (limited to 'lib/ktl/include/__config')
| -rw-r--r-- | lib/ktl/include/__config | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/ktl/include/__config b/lib/ktl/include/__config new file mode 100644 index 0000000..e04573e --- /dev/null +++ b/lib/ktl/include/__config @@ -0,0 +1,53 @@ +// Copyright 2022 The Fuchsia Authors +// +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file or at +// https://opensource.org/licenses/MIT + +#ifndef ZIRCON_KERNEL_LIB_KTL_INCLUDE___CONFIG_ +#define ZIRCON_KERNEL_LIB_KTL_INCLUDE___CONFIG_ + +// The libc++ internal header <__config> unconditionally responds to some +// predefines set in the EFI environment. So this header wraps it and then +// undoes the damage that our __config_site header can't prevent. + +#include_next <__config> + +#undef _LIBCPP_WIN32API +#undef _LIBCPP_MSVCRT_LIKE +#undef _LIBCPP_MSVCRT +#undef _LIBCPP_HAS_OPEN_WITH_WCHAR + +// This prevents libc++ from doing fallback to spin locks and the like for +// cases where is_always_lock_free is not true. In the kernel, we don't want +// any behind-the-scenes help like that, we want to get link errors from +// libcalls if atomics can't be lowered to real hardware instructions. +#undef _LIBCPP_ATOMIC_ONLY_USE_BUILTINS + +// These are used by <__configuration/availability.h> to decide when headers +// should expect things to be defined in the library. For the kernel, there is +// no library and so everything must be defined in headers. +#undef _LIBCPP_INTRODUCED_IN_LLVM_21 +#define _LIBCPP_INTRODUCED_IN_LLVM_21 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_20 +#define _LIBCPP_INTRODUCED_IN_LLVM_20 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_19 +#define _LIBCPP_INTRODUCED_IN_LLVM_19 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_18 +#define _LIBCPP_INTRODUCED_IN_LLVM_18 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_16 +#define _LIBCPP_INTRODUCED_IN_LLVM_16 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_15 +#define _LIBCPP_INTRODUCED_IN_LLVM_15 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_14 +#define _LIBCPP_INTRODUCED_IN_LLVM_14 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_12 +#define _LIBCPP_INTRODUCED_IN_LLVM_12 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_11 +#define _LIBCPP_INTRODUCED_IN_LLVM_11 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_9 +#define _LIBCPP_INTRODUCED_IN_LLVM_9 0 +#undef _LIBCPP_INTRODUCED_IN_LLVM_4 +#define _LIBCPP_INTRODUCED_IN_LLVM_4 0 + +#endif // ZIRCON_KERNEL_LIB_KTL_INCLUDE___CONFIG_ |