Skip to content

[clang] document that by default FP turned off for ARM baremetal #122881

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
stuij wants to merge 2 commits into
base: main
Choose a base branch
from
Open

[clang] document that by default FP turned off for ARM baremetal #122881

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7865fd2
[clang] document that by default FP turned off for ARM baremetal
stuij Jan 14, 2025
6966960
Address review comment by moving text up and expanding on it
stuij Jan 14, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions clang/docs/ReleaseNotes.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1076,6 +1076,8 @@ Arm and AArch64 Support
in leaf functions after enabling ``-fno-omit-frame-pointer``, you can do so by adding
the ``-momit-leaf-frame-pointer`` option.

- For ARM baremetal targets, the frame pointer (FP) is now turned off by default.
Copy link
Collaborator

@DavidSpickett DavidSpickett Jan 14, 2025 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I would move this before the one above and add to this "To enable the frame pointer use the -fno-omit-frame-pointer option.". I know it's stated again in the second one, but it answers the "how do I get the old way" question more obviously.

If I am not someone who ever cared to disable FP, I won't understand / care to understand what the leaf function stuff means.

Copy link
Member Author

@stuij stuij Jan 14, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

done


- Support has been added for the following processors (-mcpu identifiers in parenthesis):

For AArch64:
Expand Down
Loading