Pico build size improvements #810
Merged
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
This is where the pico-sdk sets things like -fno-exceptions. Saves a few kb. Requires enabling a policy from CMake 3.13, which the pico-sdk already requires
This is specified in pico_standard_link for the executables. Reduces the size of the logo example by ~17k (as an example)
Removes another 4k from logo and gets rid of a load of unwind code from RAM. Also consistent with 32blit-stm32
|
Interesting, same libstdc++ issue I was seeing with my MicroPython builds? |
|
Similar, but not as huge as the verbose stuff. The standard linker script ends up putting anything unwind related in RAM... and any c++ compiled with exceptions support (including the non-nano libstdc++) pulls all of it in. |
|
Wow, .uf2 size differences say it all. Nice work, thanks! |
|
Mostly 12bc110 I think. This was all discovered by accident while digging into low-level pico stuff for... other reasons. |
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Outdated suggestions cannot be applied.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.
Adds some flags to the BlitEngine library as the pico sdk does not set things globally. Also switches to nano stdlibs, mostly to avoid exceptions related code getting pulled in through libstdc++.
Saves ~24k of flash for the logo example and some RAM too.
The enabled policy requires CMake 3.13, but the pico-sdk requires that itself.