![截屏2022-06-20 下午5 40 28](https://user-images.githubusercontent.com/27812116/174631437-d3bb2f77-cf76-4cf7-8324-0e792740b23d.png)


The final solution was to move all c99 variable definitions in the for loop outside the loop, and then upgrade gcc to 4.9. Compilation succeeded.
I want to make a suggestion, I hope the official can verify it on different systems before releasing the code, thank you!!!
Under centos7, compiling Mp4box failed.
This is a GitHub Issue
repo:gpac
owner:gpac
Title : Under centos7, compiling Mp4box failed.
Issue date:

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![截屏2022-06-20 下午5 40 28](https://user-images.githubusercontent.com/27812116/174631437-d3bb2f77-cf76-4cf7-8324-0e792740b23d.png)


The final solution was to move all c99 variable definitions in the for loop outside the loop, and then upgrade gcc to 4.9. Compilation succeeded.
I want to make a suggestion, I hope the official can verify it on different systems before releasing the code, thank you!!!
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