[issue40878] Use c99 on the aixtools bot

[Stefan Krah]

Change by Stefan Krah <stefan at bytereef.org>:


----------
assignee:  -> skrah
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
type:  -> compile error

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40878>
_______________________________________