Make LTO opt-in by default instead of opt-out #167
Merged
Conversation
This file contains hidden or 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
LTO has caused problems to a few users (see issues linked at the bottom). The problem is the runtime is built as a static library by default unless otherwise specified via CMake flags, and also LTO is enabled by default. Those two things combined means the user must turn on LTO when they build their application if they're using GCC. Since we don't have evidence that LTO is making a substantial difference in the runtime, it seems prudent to leave the option but turn if off by default. Issues where this has been reported: awslabs#151 awslabs#128
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.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.
LTO has caused problems to a few users (see issues linked at the bottom).
The problem is the runtime is built as a static library by default unless otherwise specified via CMake flags, and also LTO is enabled by default. Those two things combined means the user must turn on LTO when they build their application if they're using GCC.
Since we don't have evidence that LTO is making a substantial difference in the runtime, it seems prudent to leave the option but turn if off by default.
Issues where this has been reported:
#151
#128
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.