docs.mk: use posix arguments for cp #22326
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`cp -a` is a GNU extension. Use an alternate combinaison of POSIX options (`-PRp`) that do nearly the same. The difference is `-a` will preserve context, links and xattr attributes, whereas `-p` not. But as we use it only for copy a file, there is no difference in the current context.
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`cp -a` is a GNU extension. Use an alternate combinaison of POSIX options (`-PRp`) that do nearly the same. The difference is `-a` will preserve context, links and xattr attributes, whereas `-p` not. But as we use it only for copy a file, there is no difference in the current context.
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cp -ais a GNU extension. Use an alternate combinaison of POSIX options(
-PRp) that do nearly the same.The difference is
-awill preserve context, links and xattr attributes,whereas
-pnot. But as we use it only for copy a file, there is nodifference in the current context.