[openssl-dev] [openssl.org #3738] [PATCH] tell make running subcommands are make based

[Mike Frysinger via RT]

On 08 Mar 2015 20:26, Salz, Rich wrote:
> > Lets add + to the rules we know are make based.
> 
> Isn't that a gnu-make-only thing?

looks to me like POSIX specifies it:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html#tag_20_76_13_03
-mike