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emscripten-core
GitHub Repository: emscripten-core/emscripten
 Path: blob/main/system/lib/llvm-libc/hdr/fcntl_overlay.h
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//===-- Including fcntl.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_FCNTL_OVERLAY_H

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#define LLVM_LIBC_HDR_FCNTL_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 <fcntl.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_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_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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#include <fcntl.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_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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#endif // LLVM_LIBC_HDR_FCNTL_OVERLAY_H

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