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Author	SHA1	Message	Date
Joseph Huber	3c64a98180	[libc] Partially implement 'errno' on the GPU (#97107 ) Summary: The `errno` variable is expected to be `thread_local` by the standard. However, the GPU targets do not support `thread_local` and implementing that would be a large endeavor. Because of that, we previously didn't provide the `errno` symbol at all. However, to build some programs we at least need to be able to link against `errno`. Many things that would normally set `errno` completely ignore it currently (i.e. stdio) but some programs still need to be able to link against correct C programs. For this purpose this patch exports the `errno` symbol as a simple global. Internally, this will be updated atomically so it's at least not racy. Externally, this will be on the user. I've updated the documentation to state as such. This is required to get `libc++` to build.	2024-07-01 06:30:15 -05:00
Joseph Huber	69c0b2febe	[libc][NFC] Remove all trailing spaces from libc (#82831 ) Summary: There are a lot of random training spaces on various lines. This patch just got rid of all of them with `sed 's/\ \+$//g'.	2024-02-23 16:34:00 -06:00
Joseph Huber	70b1c3999c	[libc][Docs] Add some motivation for the GPU libc This provides some basic motivation behind the GPU libc. Suggests are welcome. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D152028	2023-06-16 15:19:45 -05:00

Author

SHA1

Message

Date

Joseph Huber

3c64a98180

[libc] Partially implement 'errno' on the GPU (#97107 )

Summary:
The `errno` variable is expected to be `thread_local` by the standard.
However, the GPU targets do not support `thread_local` and implementing
that would be a large endeavor. Because of that, we previously didn't
provide the `errno` symbol at all. However, to build some programs we at
least need to be able to link against `errno`. Many things that would
normally set `errno` completely ignore it currently (i.e. stdio) but
some programs still need to be able to link against correct C programs.

For this purpose this patch exports the `errno` symbol as a simple
global. Internally, this will be updated atomically so it's at least not
racy. Externally, this will be on the user. I've updated the
documentation to state as such. This is required to get `libc++` to
build.

2024-07-01 06:30:15 -05:00

Joseph Huber

69c0b2febe

[libc][NFC] Remove all trailing spaces from libc (#82831 )

Summary:
There are a lot of random training spaces on various lines. This patch
just got rid of all of them with `sed 's/\ \+$//g'.

2024-02-23 16:34:00 -06:00

Joseph Huber

70b1c3999c

[libc][Docs] Add some motivation for the GPU libc

This provides some basic motivation behind the GPU libc. Suggests are welcome.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D152028

2023-06-16 15:19:45 -05:00

3 Commits