fix -Wno-error=sign-compare warning in gcc8 #21434
Merged
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Outdated suggestions cannot be applied.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.
related #21358
![image](https://user-images.githubusercontent.com/6836917/69815064-7cd0a480-1230-11ea-900e-0b6bb1832a69.png)
It seems the gcc8 check more strict than gcc48.
http://ci.paddlepaddle.org/viewLog.html?tab=buildLog&logTab=tree&filter=debug&expand=all&buildId=231786