The linker uses an opt-in system for non-executable stack: if all object files
opt into a non-executable stack, the binary will have a non-executable stack,
which is very desirable for security. The compiler cooperates by opting into
a non-executable stack whenever possible (always for our code).
However, we also have an assembly file (for fast power crc32 computations).
Since it doesn't opt into a non-executable stack, we get a binary with
executable stack, which Gentoo's build system rightly complains about.
Fix by adding the correct incantation to the file.
Fixes#3799.
Reported-by: Alexys Jacob <ultrabug@gmail.com>
Message-Id: <20181002151251.26383-1-avi@scylladb.com>
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