yamt commented on pull request #3170:
URL: https://github.com/apache/incubator-nuttx/pull/3170#issuecomment-806346426


   is it intentional to break standard-conforming apps, which does `extern char 
*optarg;` by itself?
   unfortunately it's how apps are expected to use this api.
   
https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/functions/getopt.html
   


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