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Niels Sascha Reedijk 3fb092979e kernel: provide kernel-level equivalents for math.h and stdlib.h
GCC 13 is more strict about what C++ features are available in a freestanding
(= build without standard library) build. The `stdlib.h` and `math.h` headers
are redefined as part of libstdc++. If the object is built as freestanding, it
should be assumed that none of the standard library functions are available.

The solution in Haiku has been to add part of the standard library into the
kernel shared object. The method of exposing them has been to allow the
use of `stdlib.h` and `math.h` in the kernel and in kernel add-ons.

This change allows that approach to continue. What it does, is that it defines
specific headers which will be picked up when a module is built using private
kernel headers. When building for the kernel (or for the boot module), it will
bypass GCC 13's libstdc++ default behaviour of not including the POSIX/platform
header with all the function definitions.

An alternative to be considered for the longer term is to specifically define
the parts of the C/C++ standard library that is available in the kernel in
these headers, or create custom headers when building kernel modules (which is
how Linux approaches it).

Change-Id: Icab4614f642219fa77732b02401570708ee9a963
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6645
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
2023-06-28 07:11:17 +00:00
3rdparty 3rdparty: Fix revision check 2023-06-22 10:02:29 -05:00
build HaikuPortsCross: Correct misaligned bootstrap package versions 2023-06-22 10:03:00 -05:00
data Update translations from Pootle 2023-06-24 08:14:34 +00:00
docs HaikuBook: fix some errors and warnings during documentation generation 2023-06-24 22:00:27 +00:00
headers kernel: provide kernel-level equivalents for math.h and stdlib.h 2023-06-28 07:11:17 +00:00
src src/bin: De-duplicate query.cpp, urlwrapper.cpp and remove clockconfig.cpp 2023-06-28 07:11:17 +00:00
.editorconfig
.gitignore gitignore: Add Visual Studio Code and IntelliJ IDEA configuration directories 2021-05-31 20:15:44 +00:00
.gitreview gerrit: Add .gitreview config 2018-01-04 00:04:02 -06:00
configure cross_tools: allow specifying a custom sysroot path 2022-06-05 09:08:20 +00:00
Jamfile Update build-packages for GCC 11 upgrade. 2021-12-07 14:26:24 -05:00
Jamrules Revert "Jamrules: Include the UserBuildConfig before processing repositories." 2019-09-15 17:33:36 +02:00
lgtm.yml lgtm.yml: disable Wformat-diag when building gcc 2021-12-14 06:06:41 +00:00
License.md
ReadMe.Compiling.md Readme.Compiling.md: Use new build profiles 2023-01-15 16:02:14 +00:00
ReadMe.md ReadMe: Add Getting Involved link 2021-06-13 21:06:58 +00:00

Haiku

Homepage | Mailing Lists | IRC Channels | Issue Tracker | API docs

Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.

Goals

  • Sensible defaults with minimal configuration required.
  • Clean, clear, concise code.
  • Unified desktop environment.

Trying Haiku

Haiku provides pre-built nightly images and release images. Haiku is compatible with a large variety of hardware, but in case you don't want to "take the plunge" and install Haiku on bare metal, you can install it on a virtual machine (VM) instead. If you've never used a VM before, you can follow one of the "Emulating Haiku" guides.

Compiling Haiku

See ReadMe.Compiling.

Contributing

Haiku is a meritocratic open source project with a large variety of tasks. Even if you can't write code, you can still help! Haiku needs designers, (technical) writers, translators, testers... Get involved and help out!

Contributing code

If you're submitting a patch to us, please make sure you're following the patch submitting guidelines.

If you're having trouble finding something in the source tree, you can use one of our web-based source code browsers:

Contributing documentation

The main piece of documentation that still needs work are the API docs (found in the tree at docs/user). Just find an undocumented class, write documentation for it, and submit a patch.

Contributing translations

See wiki:i18n.

Contributing software ports

See HaikuPorts.

Contributing to our infrastructure

See Infrastructure.