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7477b61b24
Reverts the revert #119295 of #118882 by expanding #118882 with additional fixes which made CI unhappy.
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
//===-- Including unistd.h in overlay mode -------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_HDR_UNISTD_OVERLAY_H
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#define LLVM_LIBC_HDR_UNISTD_OVERLAY_H
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#ifdef LIBC_FULL_BUILD
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#error "This header should only be included in overlay mode"
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#endif
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// Overlay mode
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// glibc <unistd.h> header might provide extern inline definitions for few
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// functions, causing external alias errors. They are guarded by
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// `__USE_EXTERN_INLINES` macro. We temporarily disable `__USE_EXTERN_INLINES`
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// macro by defining `__NO_INLINE__` before including <stdio.h>.
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// And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled
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// with `_FORTIFY_SOURCE`.
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#ifdef _FORTIFY_SOURCE
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#define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE
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#undef _FORTIFY_SOURCE
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#endif
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#ifdef __USE_EXTERN_INLINES
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#define LIBC_OLD_USE_EXTERN_INLINES
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#undef __USE_EXTERN_INLINES
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#endif
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#ifdef __USE_FORTIFY_LEVEL
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#define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL
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#undef __USE_FORTIFY_LEVEL
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#define __USE_FORTIFY_LEVEL 0
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#endif
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#ifndef __NO_INLINE__
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#define __NO_INLINE__ 1
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#define LIBC_SET_NO_INLINE
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#endif
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#include <unistd.h>
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#ifdef LIBC_OLD_FORTIFY_SOURCE
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#define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE
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#undef LIBC_OLD_FORTIFY_SOURCE
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#endif
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#ifdef LIBC_SET_NO_INLINE
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#undef __NO_INLINE__
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#undef LIBC_SET_NO_INLINE
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#endif
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#ifdef LIBC_OLD_USE_FORTIFY_LEVEL
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#undef __USE_FORTIFY_LEVEL
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#define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL
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#undef LIBC_OLD_USE_FORTIFY_LEVEL
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#endif
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#ifdef LIBC_OLD_USE_EXTERN_INLINES
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#define __USE_EXTERN_INLINES
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#undef LIBC_OLD_USE_EXTERN_INLINES
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#endif
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#endif // LLVM_LIBC_HDR_UNISTD_OVERLAY_H
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