Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
emscripten-core
GitHub Repository: emscripten-core/emscripten
 Path: blob/main/system/lib/llvm-libc/hdr/stdio_overlay.h
6168 views
1
//===-- Including stdio.h in overlay mode ---------------------------------===//

2
//

3
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

4
// See https://llvm.org/LICENSE.txt for license information.

5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

6
//

7
//===----------------------------------------------------------------------===//

8


9
#ifndef LLVM_LIBC_HDR_STDIO_OVERLAY_H

10
#define LLVM_LIBC_HDR_STDIO_OVERLAY_H

11


12
#ifdef LIBC_FULL_BUILD

13
#error "This header should only be included in overlay mode"

14
#endif

15


16
// Overlay mode

17


18
// glibc <stdio.h> header might provide extern inline definitions for few

19
// functions, causing external alias errors.  They are guarded by

20
// `__USE_EXTERN_INLINES` macro.  We temporarily disable `__USE_EXTERN_INLINES`

21
// macro by defining `__NO_INLINE__` before including <stdio.h>.

22
// And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled

23
// with `_FORTIFY_SOURCE`.

24


25
#ifdef _FORTIFY_SOURCE

26
#define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE

27
#undef _FORTIFY_SOURCE

28
#endif

29


30
#ifdef __USE_EXTERN_INLINES

31
#define LIBC_OLD_USE_EXTERN_INLINES

32
#undef __USE_EXTERN_INLINES

33
#endif

34


35
#ifdef __USE_FORTIFY_LEVEL

36
#define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL

37
#undef __USE_FORTIFY_LEVEL

38
#define __USE_FORTIFY_LEVEL 0

39
#endif

40


41
#ifndef __NO_INLINE__

42
#define __NO_INLINE__ 1

43
#define LIBC_SET_NO_INLINE

44
#endif

45


46
#include <stdio.h>

47


48
#ifdef LIBC_OLD_FORTIFY_SOURCE

49
#define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE

50
#undef LIBC_OLD_FORTIFY_SOURCE

51
#endif

52


53
#ifdef LIBC_SET_NO_INLINE

54
#undef __NO_INLINE__

55
#undef LIBC_SET_NO_INLINE

56
#endif

57


58
#ifdef LIBC_OLD_USE_FORTIFY_LEVEL

59
#undef __USE_FORTIFY_LEVEL

60
#define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL

61
#undef LIBC_OLD_USE_FORTIFY_LEVEL

62
#endif

63


64
#ifdef LIBC_OLD_USE_EXTERN_INLINES

65
#define __USE_EXTERN_INLINES

66
#undef LIBC_OLD_USE_EXTERN_INLINES

67
#endif

68


69
#endif // LLVM_LIBC_HDR_STDIO_OVERLAY_H

70


71