mirror of
https://review.haiku-os.org/haiku
synced 2025-02-07 14:25:58 +01:00
34 lines
1.2 KiB
C
34 lines
1.2 KiB
C
|
/*
|
||
|
|
* Copyright 2023, Haiku Inc. All Rights Reserved.
|
||
|
|
* Distributed under the terms of the MIT License.
|
||
|
|
*/
|
||
|
|
#ifndef _KERNEL_STDLIB_H
|
||
|
|
#define _KERNEL_STDLIB_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
When building the kernel, the bootloader or kernel add-ons, the Haiku build system passes the
|
||
|
|
`-ffreestanding` argument to GCC, in order to make sure that only the C++ language features can
|
||
|
|
be used that do not require the C/C++ standard library.
|
||
|
|
The Haiku kernel and boot loaders include part of the standard library in the kernel/boot
|
||
|
|
loader. It uses the C/C++ standard library headers (like this one) to expose the
|
||
|
|
functions/features that are included.
|
||
|
|
|
||
|
|
If we are building for the kernel or the boot loader, the logic below will tell GCC's C++
|
||
|
|
headers to include the underlying posix headers, so that the kernel, the boot loader and kernel
|
||
|
|
add-ons can link to the symbols defined in them.
|
||
|
|
|
||
|
|
When we are NOT building for the kernel or the boot loader, we fall back to GCC's default
|
||
|
|
behaviour.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if (defined(_KERNEL_MODE) || defined(_BOOT_MODE)) && !defined(_GLIBCXX_INCLUDE_NEXT_C_HEADERS)
|
||
|
|
# define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
|
||
|
|
# include_next <stdlib.h>
|
||
|
|
# undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
|
||
|
|
#else
|
||
|
|
# include_next <stdlib.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#endif // _KERNEL_STDLIB_H
|