picolibc: Disable exceptions for picolibc libstdc++ #873
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Picolibc is targeted for smaller embedded systems. It brings improvement over newlib-nano in case of pure C applications. However when used with C++ applications all gains from smaller size of libc are wasted by exception handling support in libstdc++. This change disables exception support in picolibc libstdc++. It results in decreased flash usage - ~9.5kB for ARM target. Signed-off-by: Adrian Gielniewski <[email protected]>
maciejbaczmanski
approved these changes
Feb 27, 2025
|
Should this wait until we figure out a plan to support libstdc++ as a module so that apps needing exceptions can use that instead? |
Sure, makes sense. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Picolibc is targeted for smaller embedded systems. It brings improvement over newlib-nano in case of pure C applications. However when used with C++ applications all gains from smaller size of libc are wasted by exception handling support in libstdc++.
This change disables exception support in picolibc libstdc++. It results in decreased flash usage - ~9.5kB for ARM target.
crosstool-ng PR: zephyrproject-rtos/crosstool-ng#33
Fixes #860